Purchase_and_Installation_of_Wastewater_Decanter_Centrifuge.pdf

INVITATION TO BID

ITB #2027-09B

PURCHASE AND INSTALLATION OF WASTEWATER DECANTER

CENTRIFUGE

City of Rosenberg

2110 4th Street

Rosenberg, TX 77471

RELEASE DATE: September 21, 2026

DEADLINE FOR QUESTIONS: October 9, 2026

RESPONSE DEADLINE: October 15, 2026, 2:00 pm

RESPONSES MUST BE SUBMITTED ELECTRONICALLY TO:

https://procurement.opengov.com/portal/rosenbergtx

City of Rosenberg

INVITATION TO BID

Purchase and Installation of Wastewater Decanter Centrifuge

I. Introduction II. Legal Notice

III. Instructions IV. Mandatory Terms & Conditions V. Other Terms & Conditions

VI. Specifications VII. Vendor Questionnaire

VIII. Pricing Proposal

Invitation To Bid #2027-09B Title: Purchase and Installation of Wastewater Decanter Centrifuge

1. Introduction

1.1. Summary

The City of Rosenberg is seeking bids from qualified suppliers for the purchase and installation of a

Wastewater Decanter Centrifuge System to be installed at Wastewater Treatment Plant 1A located at

2630 Avenue A, Rosenberg, TX 77471.

Notice to All Vendors

The City of Rosenberg utilizes OpenGov Procurement as its eProcurement platform. All solicitations, official notices, addenda, other solicitation documents, and contracts will be posted in OpenGov.

Registration is highly encouraged to ensure you receive proper notifications.

Information obtained from any other source is done so solely at your own risk.

The City of Rosenberg takes no responsibility for information posted outside of the OpenGov

Procurement Platform or Legal Notices published in the Fort Bend Herald.

1.2. Contact Information

Blake Skiles

Procurement Manager

2110 4th Street

Rosenberg, TX 77471

Email: tskiles@rosenbergtx.gov

Phone: (832) 595-3363

Department:

Utilities

1.3. Timeline

Advertisement 1 September 20, 2026

Release Project Date September 21, 2026

Advertisement 2 September 27, 2026

Question Submission Deadline October 9, 2026, 5:00pm

Proposal Submission Deadline October 15, 2026, 2:00pm mailto:tskiles@rosenbergtx.gov tel:(832)595-3363

2. Legal Notice

2.1. Notice to Bidders

The City of Rosenberg is soliciting sealed bids from qualified vendors for Purchase and Installation of

Wastewater Decanter Centrifuge.

Sealed Bids must be submitted electronically or received by the City Secretary’s Office no later than:

2:00 pm, Thursday, October 15, 2026.

All sealed bids must be received by the deadline shown. Bids received after the deadline will not be considered for the award of the contract and shall be considered void and unacceptable. All bids will be opened, and bidder’s names publicly read aloud promptly in the City Hall Council Chamber, at 2110 4th

Street, Rosenberg, Texas 77471 on the date and time shown above.

To obtain a copy of the Invitation to Bid or submit an electronic bid please visit:

https://procurement.opengov.com/portal/rosenbergtx

Should you have any questions or require additional information or clarification on information contained in the ITB, please submit your questions via OpenGov Procurement at the website listed above.

Danyel Swint, TRMC, City Secretary

3. Instructions

3.1. General Instructions

The City of Rosenberg will receive sealed bids for the goods/services described in this Invitation to bid

(ITB).

IT IS UNDERSTOOD that the City Council of the City of Rosenberg reserves the right to reject any or all bids for any or all products and/or services covered in this Invitation to Bid and to waive any informalities or defects in such bids.

FACSIMILE AND/OR EMAIL TRANSMITTALS SHALL NOT BE ACCEPTED AND WILL BE VOIDED IF

RECEIVED.

Bidders should carefully examine all terms, conditions, specifications and related documents. Should a bidder find discrepancies in, or omissions from, the specifications or related documents, or should there be a doubt as to their meaning, the City of Rosenberg Procurement Department should be notified immediately for clarification prior to submitting the bid. In the event of any conflict between the terms and conditions of these requirements and the specifications, the specifications shall govern. In the event of any conflict of interpretation of any part of this overall document, the City of Rosenberg’s interpretation shall govern.

3.2. Bidder Responsibility

Bid must be submitted on the pricing forms included for that purpose in this packet. Each bid shall be acknowledged by a person having the authority to bind the firm in a contract.

3.3. Documentation

Bidder shall provide with this bid response all documentation required by this ITB. Failure to provide this information may result in rejection of bid.

3.4. Descriptions

Specifications may reference any catalog, brand name or manufacturers’ model numbers. It is the intent of the City of Rosenberg to be DESCRIPTIVE – NOT RESTRICTIVE and to establish a desired quality level of merchandise or to meet a pre-established standard of quality. Bidders may offer items of equal quality and the burden of proof of such quality rests with them.

3.5. Pricing

Bidders are instructed to bid the unit price on the item(s) specified. Prices for all goods and/or services shall be firm for the initial contract term and shall be stated on the bid sheet. Prices shall be all inclusive.

No price changes, additions or subsequent qualifications will be honored during the course of the contract unless approved by both parties. Additional charges not shown on the bid will not be honored.

All prices submitted in response to this solicitation shall be firm and inclusive of any and all applicable tariffs, duties, surcharges, import fees, or other trade-related costs in effect at the time of bid submission.

The City will not consider, accept, or approve any additional costs, price increases, claims, or adjustments related to tariffs or trade restrictions that were not expressly included in the bidder’s submitted bid price.

Pricing shall be inclusive of the complete installation of system, hoses, connections, and plumbing. As well as a minimum of 3 days of manufacturers technician and centrifuge operator onsite after installation for start-up and commissioning.

By submitting a bid, the bidder acknowledges and agrees that:

• The bidder has fully accounted for all known and foreseeable tariffs and trade impacts in its pricing; and

• The bidder assumes all risk of tariff changes, new tariffs, or trade actions unless otherwise expressly stated in the solicitation.

• The bidder has ensured all pricing is inclusive of the specifications and will include the required time with a technician and operator after installation.

Failure to include such costs in the bid price shall not constitute grounds for contract modification, price adjustment, or equitable relief.

3.6. Firm Pricing

Pricing and discounts submitted are firm for the initial contract term specified in the solicitation. Price decreases are allowed at any time. Price increases shall only be considered as stipulated below in paragraph, “PRICE ADJUSTMENTS”.

3.7. Price Adjustments

Prices must be firm for a period of one year from date of contract award. Any request for price adjustment must be based on the Houston-The Woodlands-Sugar Land Statistical Area (HWS) Consumer

Price Index (CPI), as determined by US Bureau of Labor Statistics. The price will be increased or decreased based upon the April index, published mid-May for the HWS CPI or the most recent index published, if April index not yet published. The maximum escalation will not exceed +/- 2.5% for any individual year. The escalation will be determined annually at the renewal date. The supplier should provide documentation as percentage of each cost associated with the unit prices quoted for consideration.

Request(s) must be submitted in writing with supporting evidence for need of such increase to the

Procurement Department at least 60 days prior to contract expiration of each year. Respondent must also provide supporting documentation as justification for the request.

Upon receipt of such request, the City of Rosenberg reserves the right to either: accept the escalation as competitive with the general market price at the time and become effective upon the renewal date of the contract award or reject the increases within 30 calendar days after receipt of a properly submitted request. If a properly submitted increase is rejected, the Contractor may request cancellation of such items from the Contract by giving the City of Rosenberg written notice. Cancellation will not go into effect for 15 calendar days after a determination has been issued. Pre- price increase costs must be honored on orders dated up to the official date of the City of Rosenberg approval and/or cancellation.

3.8. Price Decreases/Discount Increases

Vendors are required to immediately implement any price decrease or discount increase that may become available. The City of Rosenberg must be notified in writing for the purposes of updating the contract.

3.9. Sales Tax

City of Rosenberg is exempt by law from payment of Texas Sales Tax and Federal Excise Tax. As such, tax should not be included in bid.

3.10. Addenda

Any interpretations, corrections or changes to this Invitation to Bid and Specifications will be made by addenda. Sole issuing authority of addenda shall also be vested in the City of Rosenberg Procurement

Department.

3.11. Issuance of Addenda

As addenda is issued, it shall be posted via the City's eProcurement Portal. It is the bidder's responsibility as the supplier to review all addenda posted prior to the completion and submission of the bid. All addenda should be reviewed and considered in the submission of the bid as it pertains to the pricing and scope of work outlined herein.

Bidders are responsible for checking the City's eProcurement Portal regularly for any changes to the bid documents, such as addenda, clarifications, and questions. The City can only guarantee the accuracy and completeness of information on the City's eProcurement Portal. If another agency or construction data website references this project, please also refer to the City's eProcurement Portal or contact the City of

Rosenberg Procurement Department at (832) 595-3363 to verify completeness of the data.

3.12. Late Bids

Bids received by the city after the submission deadline will be considered VOID and unacceptable. City of Rosenberg is not responsible for lateness, failure of technology or non-delivery of mail, carrier, etc.

The date/time stamp in the City Secretary’s Office shall be the official time of receipt.

3.13. Bid Withdrawal

Any bid may be withdrawn and/or edited prior to the scheduled time for opening via the City's eProcurement Portal.

3.14. Bid Rejection

City Council may choose to reject all bids and not award any contract.

3.15. Bid Award

The City shall award the contract to the lowest responsive and responsible bidder(s) under each section, providing the best value to the City meeting or exceeding the terms, conditions, and specifications of the bid. The City has the right to award contracts upon the conditions, terms, and specifications contained in a bid submitted to the City for a period of up to one hundred and eighty (180) days following the date specified for the opening of bids.

In determining the lowest responsive and responsible bidder, the City may consider:

1. Whether the bidder has adequate financial resources to comply with the contract awarded;

2. Whether the bidder has a satisfactory record of performance with the City or other entities;

3. Any other factors that could be material to the bidder’s ability to comply with the contract;

4. Principal place of business for bidder(s) whose bid for real property is within three (3) percent of the lowest bid price received from non- resident bidders (Texas Local Government Code

271.905); and

5. Principal place of business for bidder(s) whose bid of construction services in an amount less than $100,000.00, or a contract for purchases less than $500,000.00, is within five (5) percent of the lowest bid price received from non-resident bidders (Texas Local Government Code 271.90).

3.16. Contract Term

Contract shall commence on the latest date executed by both parties and continue until complete. The term of the Contract may extend only by written amendment as mutually agreed between the City and bidder.

4. Mandatory Terms & Conditions

Because the City of Rosenberg is a governmental entity that must follow State and Federal Laws and has an obligation to protect its taxpayers, the City requires that certain terms be included in the contract that results from this solicitation. Your response to this solicitation is an offer to contract with the City based on the terms, conditions and specifications contained in this solicitation. If any of the mandatory contract terms are unacceptable to your firm, please do not respond to this solicitation.

4.1. Conflicting Provisions

The contract consists only of the city-prepared contract and any additional city or vendor contract documents incorporated by reference as a part of the contract. If a conflict or inconsistency exists between the city-prepared contract and a document incorporated by reference, the city-prepared contract controls. If a conflict or inconsistency exists between any additional contract documents incorporated by reference, the city’s additional contract document takes precedence over the contractor’s additional contract document.

4.2. Payment Provisions

The City’s payments are under the Contract, including the time of payment and payment of interest on overdue amounts, are subject to Chapter 2251, Texas Government Code.

4.3. Multi-Year Contracts

If the City Council does not appropriate funds to make any payment for a fiscal year after the City’s fiscal year in which the contract becomes effective and there are no proceeds available for payment from the sale of bonds or other debt instruments, then the Contract automatically terminates at the beginning of the first day of the successive fiscal year. (Section 5, Article XI, Texas Constitution)

4.4. Liability and Indemnity

Any provision of the Contract is void and unenforceable if it:

1. Limits or releases either party from liability that would exist by law in the absence of the provision;

2. Creates liability for either party that would not exist by law in the absence of the provision; or

3. Waives or limits either party’s rights defenses, remedies or immunities that would exist by law in the absence of the provision (Section 5, Article XI, Texas Constitution)

4.5. Insurance Requirements

Successful bidder (as Contractor) must maintain the insurance types and coverages and comply with the insurance requirements shown in the Owner’s Minimum Insurance Policy Limits outlined as part of the

Invitation to Bid.

Within ten (10) days of the initial request; prior to City Council’s award of the contract, the successful bidder must furnish original certificates of insurance and corresponding endorsements that meet these insurance requirements.

4.6. Confidentiality

Any provision in the Contract that attempts to prevent the City’s disclosure of information subject to public disclosure under federal or Texas law or regulation, or court or administrative decision or ruling, is invalid. (Chapter 552, Texas Government Code)

4.7. Tax Exemption

The City is not liable to Vendor for any federal, state, or local taxes for which the City is not liable by law, including state and local sales and use taxes (Section 151.309 and Title 3, Texas Tax Code) and federal excise tax (Subtitle D of the Internal Revenue Code). Accordingly, those taxes may not be added to any item. The city’s Tax Exemption Certificate will be furnished by the city on request of the contractor.

4.8. Contractual Limitations Period

Any provision of the Contract that establishes a limitations period that does not run against the City by law or that is shorter than two years is void. (Sections 16.061 and 16.070, Texas Civil Practice and

Remedies Code)

4.9. Governing Law and Venue

Texas law governs this Contract and any lawsuit on this Contract must be filed in a court that has jurisdiction in Fort Bend County, Texas.

4.10. Termination for Convenience

The City may terminate the Contract and/or any other Agreement(s) for convenience and without cause or further liability, upon no less than thirty (30) calendar day’s written notice to the Successful Bidder.

The City reserves the right to extend this period if it is in the best interest of the City. In the event the

City exercises its right to terminate without cause, it is understood and agreed that only the amounts due to the Successful Bidder for goods, commodities and/or services provided, and expenses incurred to and including the date of termination, will be due and payable. No penalty will be assessed for the City's termination for convenience.

4.11. Termination for Cause

The City of Rosenberg reserves the right to terminate the contract immediately in the event the successful bidder:

1. Fails to meet delivery schedules;

2. Defaults in the payment of any fees;

3. Otherwise fails to perform in accordance with this contract;

4. Becomes insolvent and/or files for protection under bankruptcy laws.

Such termination is in addition to and not in lieu of any other remedies that City of Rosenberg may have in law or equity. Bidder, in submitting this bid, agrees that City of Rosenberg shall not be liable to prosecution for damages in the event that the City declares the bidder in default.

4.12. Force Majeure

If the party obligated to perform is prevented from performance by an act of war, order of legal authority, act of God, or other unavoidable cause not attributable to the fault or negligence of said party, the other party shall grant such party relief from the performance. The burden of proof for the need of such relief shall rest upon the party obligated to perform. To obtain release based on force majeure, the party obligated to perform shall file a written request with the other party.

4.13. Ex-Parte Communication

Please note that to ensure the proper and fair evaluation of a response to a solicitation, the City prohibits ex-parte communication (e.g. unsolicited) initiated by the Respondent to any Department

Head, City Employee or Committee Member evaluating or considering the responses prior to the time a formal decision has been made. Questions and other communication from vendors will be permissible by the means established in the solicitation until the day and time specified as the deadline for questions. Any communication between Respondent and the City after the deadline for questions will be initiated by the appropriate City Employee in order to obtain information or clarification needed to develop a proper and accurate evaluation of the response. Ex-parte communication may be grounds for disqualifying the offending Respondent from consideration or award of the solicitation then in evaluation. If a Respondent violates these provisions more than once in a three (3) year period, the Chief

Procurement Officer may debar the Respondent from the sale of goods or services to the City for a period not to exceed three (3) years.

5. Other Terms & Conditions

5.1. Remedies

The successful bidder and City of Rosenberg agree that both parties have all rights, duties and remedies available as stated in the Uniform Commercial Code.

5.2. Conflict of Interest

No public official shall have interest in this contract except in accordance with Vernon’s Texas Codes

Annotated, Local Government Code Title 5, Subtitle C, Chapter 171.

5.3. Ethics

The respondent shall not offer or accept gifts or anything of value or enter into any business arrangement with any employee, official or agent of City of Rosenberg. More than one proposal on any one contract from a Respondent or individual under different names shall be grounds for rejection of all proposals in which the Respondent or individual has an interest. One or all proposals will be rejected if there is any reason to believe that collusion exists between Respondents.

5.4. Purchase Order

City of Rosenberg shall generate a purchase order to the successful bidder. The Purchase order number must appear on all invoices, packing lists and all related correspondence. City of Rosenberg will not be responsible for any orders placed and / or delivered without a valid Purchase Order number.

5.5. Delivery

Any delivery and freight charges (FOB Rosenberg designated location) are to be included in the bid price.

5.6. Packing Slips

Packing Slips or other suitable shipping documents shall accompany each shipment and shall show:

1. Vendor Company Name and Address

2. Name and address of City of Rosenberg department the shipment is being made to

3. City of Rosenberg purchase order number

4. Descriptive information as to the items delivered, including quantity and part numbers

5.7. Invoices

Invoices of the awarded Contractor shall be itemized and contain detailed description, quantity, and a unit price calculated in accordance with the terms stated on the awarded Contractor’s Pricing Sheet.

The City’s purchase order number must appear on the invoice unless a procurement card is used as payment. The City will not allow any credit card fees to be added when using a procurement card.

Invoices submitted for payment shall be addressed to:

City of Rosenberg - Accounts Payable

P.O. Box 32

Rosenberg, TX 77471

Email: accountspayable@rosenbergtx.gov

5.8. Quality Control

Goods supplied under this contract shall be subject to approval as to quality and must conform to the highest standards of manufacturing practice. Items found defective or not meeting specifications shall be replaced at the supplier’s expense within a reasonable period of time. Payment for defective goods or goods failing to meet specifications is not due until 30 days after satisfactory replacement has been made.

5.9. Warranty

Successful bidder shall warrant that all items or services shall conform to the proposed specifications and all warranties state in the Uniform Commercial Code and be free from all defects in material, workmanship and title.

5.10. Patents/Copyrights

The successful bidder agrees to protect City of Rosenberg from claims involving infringements of patents and/or copyrights.

5.11. Notice

Any notice provided by this bid or required by law to be given to the successful bidder by City of

Rosenberg shall be deemed to have been given and received on the next business day after such written notice has been deposited in the US Mail in Rosenberg, Texas, by Registered or Certified Mail with sufficient postage affixed thereto, addressed to the successful bidder at the address so provided;

provided this shall not prevent the giving of actual notice in any other manner.

5.12. Assignment

The successful bidder shall not sell, assign, transfer or convey this contract, in whole or in part, without the prior written consent of City of Rosenberg.

5.13. Silence of Specifications

The apparent silence of the specifications as to any detail or to the apparent omission from it of a detailed description concerning any point, shall be regarded as meaning that only the best commercial practices are to prevail. All interpretations of the specifications shall be made on the basis of this statement.

5.14. Cooperative Procurement Program

During the term of the Contract resulting from this ITB, the City would like to afford the same prices, terms and conditions to other political subdivisions or public entities. Another entity's participation in the Contract resulting from this ITB is subject to a properly authorized Purchasing Cooperative Inter-local Agreement with the City. Any liability created by purchase orders issued against the Contract shall be the sole responsibility of the governmental agency placing the order.

6. Specifications

6.1. General Requirements

The Contractor shall furnish a new, heavy-duty, continuous-operation decanter centrifuge suitable for the intended solids/liquid separation application. The centrifuge shall be designed for continuous industrial operation and shall incorporate corrosion-resistant materials, abrasion-resistant wear protection, an integrated polymer feed, adjustable process controls, and an integrated electrical/control system.

All equipment shall be new and unused unless otherwise specified.

The equipment proposed shall meet or exceed all minimum performance and dimensional requirements specified herein. Where a manufacturer, model, trade name, proprietary design, or specific product is referenced elsewhere in the solicitation, the reference shall be interpreted as “or equal.”

6.2. Bowl Assembly

Bowl Diameter

Minimum bowl diameter: 24 inches.

Bowl Length

Minimum overall bowl length: 96 inches.

Bowl Geometry

The centrifuge shall incorporate a cylindrical/conical bowl configuration appropriate for continuous solids/liquid separation.

Beach Angle

The conical beach section shall have an angle of approximately 15 degrees, or an alternative configuration demonstrated by the manufacturer to provide equivalent or superior solids conveying and dewatering performance.

If a different beach angle is proposed, the Bidder shall provide supporting technical documentation demonstrating equivalent performance.

Bowl Speed

Maximum bowl operating speed shall be not less than 3,000 RPM.

G-Force

The centrifuge shall be capable of producing a maximum centrifugal force of not less than 3,067 × G, based upon the manufacturer's stated bowl geometry and maximum operating speed.

6.3. Materials of Construction

Bowl

The centrifuge bowl, including the cylindrical section, conical section, and associated bowl heads, shall be constructed of Duplex 2205 stainless steel or a material having equal or superior corrosion resistance, mechanical strength, and service life for the intended application.

Conveyor

The conveyor hub and flights shall be constructed of Duplex 2205 stainless steel or an equal or superior material.

Alternative Materials

Any proposed alternative material shall be documented by the Bidder and shall demonstrate equivalent or superior:

• Corrosion resistance;

• Tensile and mechanical strength;

• Abrasion resistance;

• Operating temperature capability;

• Expected service life; and

• Suitability for the intended process.

6.4. Solids Discharge System

The centrifuge shall provide continuous solids discharge without interruption of normal operation.

Discharge Ports

The centrifuge shall have a minimum of four (4) solids discharge ports, or an alternative discharge configuration demonstrated to provide equivalent or superior solids handling capacity.

Replaceable Wear Components

Solids discharge components subject to abrasion shall incorporate field replaceable wear components or nozzles to facilitate maintenance and minimize equipment downtime.

Wear Protection

The solids discharge area, conveyor, and other components exposed to abrasive solids shall incorporate replaceable or serviceable wear protection suitable for the intended application.

Acceptable wear protection may include tungsten carbide tiles, tungsten carbide hard facing, or other commercially available materials providing equal or superior abrasion resistance.

Conveyor Wear Protection

The conveyor flights shall incorporate continuous or strategically applied abrasion resistant wear protection designed for the anticipated solids loading and service conditions.

The Bidder shall identify the proposed wear-protection material and application method.

Head and Bowl Extension Protection

The centrifuge shall incorporate abrasion resistant protection at the solids discharge head and bowl extension or provide an alternative wear protection design offering equivalent or superior protection.

6.5. Liquid Discharge System

Liquid Discharge

The centrifuge shall provide continuous clarified-liquid discharge suitable for the intended application.

Adjustable Weirs

The liquid discharge system shall incorporate adjustable liquid level control/weir mechanisms permitting adjustment of the liquid pool depth to optimize separation performance.

The system shall provide equivalent operational functionality if an alternative design is proposed.

6.6. Conveyor System

Conveyor Configuration

The centrifuge shall incorporate a continuous internal conveyor/scroll designed to transport separated solids toward the solids discharge area.

Conveyor Pitch

The conveyor shall have a pitch/configuration suitable for the specified bowl dimensions and intended solids loading.

A nominal 8-inch single lead pitch is preferred; however, alternative conveyor geometry shall be acceptable when demonstrated to provide equivalent or superior solids conveying performance.

Axial Flow

The conveyor shall utilize an axial flow or equivalent solids conveying design capable of continuously transporting solids through the centrifuge without unacceptable accumulation or plugging.

Wear Protection

All conveyor surfaces exposed to abrasive material shall be protected by tungsten carbide or an alternative abrasion resistant material providing equivalent or superior performance.

The Bidder shall specify the type, thickness, application method, and expected service life of the proposed wear protection.

6.7. Drive System

Main Drive Motor

The centrifuge shall be equipped with a primary electric drive motor rated at not less than 125 HP, unless the manufacturer demonstrates that a lower-rated motor provides equivalent or superior operating performance.

The motor shall be:

• Three-phase;

• TEFC or equivalent enclosure;

• Rated for 460–480 VAC;

• 60 Hz; and

• Suitable for continuous industrial service.

Back Drive

The centrifuge shall be equipped with an independently controlled differential/back drive system capable of maintaining and controlling conveyor differential speed under varying process loads.

The back drive motor shall be rated at not less than 30 HP, unless the manufacturer demonstrates equivalent or superior performance.

The back drive motor shall be:

• Three-phase;

• TEFC or equivalent enclosure;

• Rated for 460–480 VAC;

• 60 Hz; and

• Suitable for continuous industrial service.

Differential Speed

The centrifuge shall provide a continuously adjustable differential-speed range of approximately 2 to 70

RPM, or a range equal to or greater than this requirement.

The control system shall permit adjustment of differential speed during operation.

6.8. Gearbox

The centrifuge shall be equipped with a heavy-duty gearbox suitable for continuous operation at the maximum rated bowl speed, motor horsepower, and anticipated solids loading.

The gearbox shall provide:

• Minimum rated torque capacity of 11 kNm (approximately 97,000 in-lb) or greater;

• Appropriate reduction ratio for the proposed bowl and drive configuration;

• Continuous duty industrial service;

• Adequate overload capacity; and

• Protection against damage resulting from anticipated operating loads.

The gearbox manufacturer, model, ratio, torque rating, and service factor shall be identified in the

Bidder's proposal.

No specific gearbox manufacturer, model, gear ratio, or proprietary gearbox design is required, provided the proposed equipment meets or exceeds the performance requirements.

6.9. Drive Coupling

The connection between the back drive motor and gearbox/pinion shall utilize a flexible coupling or equivalent mechanical connection designed to:

• Accommodate normal shaft misalignment;

• Transmit the required torque;

• Minimize vibration;

• Protect connected equipment; and

• Provide service life appropriate for continuous industrial operation.

A specific coupling manufacturer or model is not required.

6.10. Feed System

The centrifuge shall be equipped with a feed tube having a nominal diameter of 3 inches, or an alternative feed arrangement capable of providing equal or greater flow capacity without adversely affecting separation performance.

The feed system shall be constructed of materials compatible with the process stream and shall be designed to minimize turbulence and premature solids/liquid separation prior to entering the bowl.

6.11. Skid and Structural Assembly

Base

The centrifuge shall be mounted and anchored to new erected concrete pedestal columns, or a rigid structural steel base/skid capable of supporting the complete operating equipment assembly, including dynamic loads and vibration forces.

Structural Material

Painted carbon/mild steel structural members are acceptable for the primary skid unless the application requires an alternative material.

Case

The centrifuge casing shall be designed to provide containment of process material and shall incorporate corrosion resistant materials in areas exposed to process liquids.

The lower and upper case sections shall be constructed of stainless steel or an alternative material providing equal or superior corrosion resistance and durability where exposed to the process stream.

Maintenance Access

The centrifuge shall provide safe and practical access for inspection, cleaning, lubrication, wear component replacement, and routine maintenance.

Case Clamps

The casing shall incorporate a secure and serviceable clamping/fastening system permitting efficient opening and closing for maintenance.

Lifting Assistance

The equipment shall incorporate lifting assistance or an equivalent feature to facilitate safe maintenance access to heavy covers, case sections, or other components requiring removal.

6.12. Electrical and Control System

Variable Frequency Drives

The centrifuge shall be equipped with variable frequency drives or equivalent motor control technology for independent control of the primary and differential/back-drive motors.

Main Drive Control

The primary motor drive shall be rated appropriately for the specified motor horsepower and operating conditions.

Back Drive Control

The differential/back drive system shall provide variable speed control and shall automatically respond to changing torque/load conditions as required to protect the centrifuge and maintain stable operation.

Pump Control

Where a process pump is included as part of the centrifuge package, the pump shall be provided with appropriately sized variable speed control or equivalent motor-control equipment.

A 10 HP pump motor and associated control capacity shall be provided where required by the City's process design.

PLC

The control system shall utilize an industrial programmable logic controller (PLC) or equivalent industrial automation platform capable of:

• Monitoring operating parameters;

• Controlling bowl and differential speed;

• Monitoring motor load and torque;

• Providing equipment alarms and shutdowns;

• Monitoring safety interlocks;

• Recording or displaying operating status; and

• Providing operator-adjustable operating parameters.

No specific PLC manufacturer is required.

Operator Interface

The centrifuge shall include a color touchscreen human-machine interface (HMI) or equivalent operator interface.

The HMI shall provide, at minimum:

• Bowl speed;

• Differential speed;

• Motor status;

• Motor load/torque;

• Alarm conditions;

• Equipment status;

• Start/stop controls;

• Adjustable operating parameters; and

• Fault diagnostics.

A minimum 10-inch display is preferred.

Control Enclosure

The control equipment shall be housed in a rugged industrial enclosure suitable for the installation environment.

A stainless-steel enclosure is preferred where the equipment will be installed in a corrosive or washdown environment.

Environmental Control

The control enclosure shall include heating, cooling, ventilation, or air-conditioning equipment as necessary to maintain manufacturer-specified operating temperatures for all electrical and electronic components.

Audible/Visual Alarms

The system shall provide audible and visual indication of critical faults and equipment shutdown conditions.

Emergency Stop

The centrifuge shall include emergency-stop circuitry and safety interlocks consistent with applicable electrical, machinery, and occupational safety requirements.

Conveyor Reversing

The control system shall provide a means of safely reversing or otherwise clearing the conveyor when required for maintenance or recovery from a solids-loading condition.

The reversing method may utilize a reversing contactor, variable-frequency drive functionality, or an equivalent system capable of safely performing the required function.

6.13. Performance and Protection

The centrifuge shall be capable of continuous operation without unacceptable vibration, overheating, mechanical instability, or loss of process control.

The equipment shall incorporate appropriate protection for:

• Bowl overspeed;

• Excessive differential torque;

• Motor overload;

• Excessive vibration;

• Bearing temperature;

• Gearbox temperature;

• Loss of lubrication where applicable;

• Safety interlock conditions; and

• Other manufacturer-recommended critical operating conditions.

The control system shall automatically initiate an appropriate alarm or shutdown when a critical operating parameter exceeds the manufacturer's safe operating limits.

6.14. Equivalent Equipment

The City will consider equipment manufactured by any qualified manufacturer that meets or exceeds the functional, dimensional, performance, materials, durability, safety, and control requirements contained herein.

The use of a particular manufacturer, product name, proprietary technology, trade name, or component model shall not be required for compliance.

Where the Bidder proposes an alternative design, component, material, or configuration, the Bidder shall provide sufficient technical information for the City to determine whether the proposed equipment provides equal or better performance, functionality, durability, and serviceability.

The City reserves the right to reject proposed alternatives that do not demonstrate compliance with the minimum requirements.

7. Vendor Questionnaire

7.1. Certification

7.1.1. Bid Certification *

Bidder certifies that neither the bidder nor the firm, corporation, partnership or institution represented by the bidder, or anyone acting for such firm, corporation, or institution has violated the anti-trust laws of this State, codified in Section 15.01, et. Seq., Texas Business and Commerce Code, or the Federal antitrust laws, nor communicated directly or indirectly the bid made to any competitor or any other person engaged in such fine of business.

Bidder has examined the specifications and has fully informed themselves as to all the terms and conditions. Any discrepancies or omissions from the specifications or other documents have been clarified with City representatives and noted on the bid submitted.

Bidder guarantees product offered shall meet or exceed specifications identified in this ITB.

☐ Please confirm

*Response required

7.1.2. Estimated Build/Delivery Time*

Please state the estimated time for build and delivery.

*Response required

7.2. Required Verifications

7.2.1. Anti-Boycott & Anti-Terrorism Verifications*

In the event the ensuing contract has a value of $100,000 or more and the company has 10 or more full-time employees:

Nondiscrimination against firearm and ammunition industries. Company verifies that it does not have a practice, policy, guidance, or directive that discriminates against a firearm entity or firearm trade association and will not discriminate during the term of this contract against a firearm entity or firearm trade association, as those terms are defined by Chapter 2274, Government Code, as enacted by S.B. 19, 87th Legislature, Regular Session.

Anti-Boycott of Israel. Company verifies that it does not boycott Israel and will not boycott Israel during the term of this contract, as those terms are defined by Chapter 2271, Texas Government Code, as enacted by H.B. 4170, 86th Legislature, Regular Session.

Foreign Terrorist Organizations. Company verifies that it is not engaged in business with Iran, Sudan, or a foreign terrorist organization, as those terms are defined by Chapter 2252, Texas Government Code, as enacted by S.B.252, 85th Legislature, Regular Session.

Critical Infrastructure Affirmation. For Contracts concerning Critical infrastructure, as that term is defined by Texas Government Code Chapter 2275; The Engineer certifies (i) that Engineer, including a wholly owned subsidiary, majority-owned subsidiary, parent company, or affiliate of Engineer, is not owned by or the majority of stock or other ownership interest of Engineer is not held or controlled by individuals who are citizens of China, Iran, North Korea, Russia, or a country designated by the Governor as a threat to critical infrastructure; (ii) that Engineer including a wholly owned subsidiary, majority-owned subsidiary, parent company, or affiliate of Engineer, is not owned by or the majority of stock or other ownership interest of Engineer is not held or controlled by a company or other entity, including a governmental entity, that is owned or controlled by citizens of or is directly controlled by the government of China, Iran, North Korea, Russia, or a country designated by the Governor as a threat to critical infrastructure; and (iii) that Engineer including a wholly owned subsidiary, majority-owned subsidiary, parent company, or affiliate of Engineer, is not headquartered in China, Iran, North Korea, Russia, or a country designated by the Governor as a threat to critical infrastructure.

☐ Yes

☐ No

*Response required

7.2.2. COVID-19 Anti-Passport Verification*

In the event the ensuing contract is to be paid in whole or in part with State Funds:

Company Certification Regarding COVID-19 Vaccination. Company certifies that it does not require a customer to provide any documentation certifying the customer's COVID-19 vaccination or post-transmission recovery on entry to, to gain access to, or to receive service from Company’s business during the term of this contract, and will not require such documentation during the term of this contract, as those terms are defined by Section 161.0085, Texas Health and Safety Code, as enacted by

S.B. 968, 87th Legislature, Regular Session.

☐ Yes

☐ No

*Response required

7.3. Conflict of Interest

7.3.1. Conflict of Interest Questionnaire *

Sec. 176.006. DISCLOSURE REQUIREMENTS FOR VENDORS AND OTHER PERSONS; QUESTIONNAIRE. (a) A vendor shall file a completed conflict of interest questionnaire if the vendor has a business relationship with a local governmental entity and:

(1) has an employment or other business relationship with a local government officer of that local governmental entity, or a family member of the officer, described by Section 176.003(a)(2)(A);

(2) has given a local government officer of that local governmental entity, or a family member of the officer, one or more gifts with the aggregate value specified by Section 176.003(a)(2)(B), excluding any gift described by Section 176.003(a-1); or

(3) has a family relationship with a local government officer of that local governmental entity.

Does the vendor have a business relationship with a local government officer of the City of Rosenberg that requires disclosure pursuant to Texas Local Government Code Section 176.006 as defined above?

☐ Yes

☐ No

*Response required

When equals "Yes"

7.3.2. CIQ Form*

If vendor answered YES above. Please download the attached CIQ Form, complete and upload.

• CIQ_Conflict_of_Interest_Qu...

*Response required

7.4. Required Forms

7.4.1. Spec Sheets*

Please upload spec sheets for proposed equipment.

*Response required

7.4.2. Drawings*

Please upload drawings for proposed equipment here.

*Response required

7.4.3. Warranty*

Please upload warranty information for proposed equipment here.

*Response required

7.4.4. References*

References must be customers/clients of similar size/scope that you have contracted with within the last five (5) years. Please detail work completed for Municipal agencies first.

Please submit a MINIMUM of four (4) references. Reference must include the following:

● Company Name

● Company Address

● Contact Person

● Phone Number

● Email Address

● Description of goods provided/services performed and the size/scope of services

Do not include the City of Rosenberg or any City employees as references.

*Response required

7.4.5. Certificate of Insurance*

Minimum Insurance Requirements https://government-project.s3.us-west-2.amazonaws.com/23967/326c196c-a875-44f6-8260-e76686b1c3f8_CIQ_Conflict_of_Interest_Questionnaire.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA47RIURE4MGRMQNI3%2F20260921%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20260921T123001Z&X-Amz-Expires=72000&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEMP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLXdlc3QtMiJHMEUCIHvTIwFOGrfJy6lgPN943Z9PJ0Cz6rFPcsC1Ff51f2H7AiEAifsTKWizh9KDMzCLY8brLmEJnzEmp7ZjaZt%2F8tuwZOYqlQUIi%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARACGgw4OTIzNjQ2ODc2NzIiDH2WR%2B2UPoUFWEV%2FZSrpBMLFKyQ3xQR8xdYcy1a%2BFkfYEmIvVEJ1dqTpE7ZH30u5plp0zvozgDGm5Ft2ROiJL1AZi%2FuD9OpPEmjHxzsvthFmdaMyOvH5hnWdzFGQt8knvVMO%2B%2FFZ%2BW8jtlUDDBxyryjApZP7jTmu1GgxHEIgd9LVMAR2zW0jEF4NGUkNyJmOuvJhfrAauAZPvY%2F7%2Fk4mHadrV7jzXmB8DW0kS3MijhzSxTOmtLJxc5yXbHVzPJUI%2BgG03UHj3W6UYW2QCQCPtDBicUgF112TEmt40R3GwXi%2BpnMVm6BmNiUp6Rorpng%2FHDVvLLWwG3mTGiAR2OolooHld1%2FUkgk7rkYcNvp4sOyyYLuwOBIWEGAAXedHJ7bPLKLu9SXvgiGwfOgoqjKihosHhfvTYjIdwQoXR5i%2BlVisXx0I%2BBZfZ%2BIJOBN42r5gyeMXTVmfw9ZFLWVQuyAPJ7Kxi0KdylcBo2fzAvRxE2DZYiF3EtnYDY4gt5bq1du1yFg6dZl%2FHG05fXvuIB3rZ%2FOpXRQXjLEKCCUnNX1avVG0Pc9XV%2Bxg5STGjIdimVyC4Xim7C2pXWRa4JNJ5V10HJ95pi9t7kNeCiv5Dm9YsvjeTrgzLJwHuMhqqh1cVpiKWkXxO%2Fv1sGcsTW0DWzze7eiOltmN9IPJf8RNFOZPnC2SSXdoT%2FqMFa7mONbrp7H3%2Frb6VEf2GkuXJOmPZjRXmJzh%2FYBagar64eZIheZzKThxGdhDxxOPRMPm1HqrS2ax2ZCo7a856tdKm7UvWxosYOtMUNJHZKjuYK3%2BG9ER%2F35gDZXvJ3kBcYi8p2WTSlqGslG0sVWz74UxMNWPxNUGOpkBg0GqAF4O7jDk0uY96KsW6HG3X46bOhh08VwOuEmg5gb4gzWxtJWOYU2ZdOWo6%2Bnm24TSC5QzilB58SdNLK6DjpZaHZdVf1AQCJ2NzHudzXvjyot9fDziD0vM7Kg31Utr5AUXN9JGvxZQzWPAyEJPd0ZR04QjRoeRwe%2BVOyzd%2BWanuBz2jbhZrA4oMcaC3Qsqp530zuiHE%2FWz&X-Amz-Signature=bfb15b6f91d2374fcea8f265ad2d827a5fcfe03da774a39b21f2388b9a36acdb&X-Amz-SignedHeaders=host&response-content-disposition=attachment%3B%20filename%3D%22CIQ_Conflict_of_Interest_Questionnaire.pdf%22&x-id=GetObject

Workers Compensation:

● Statutory Limits, State of Texas Employers' Liability:

● Bodily Injury by Accident $500,000 (Each Accident)

● Bodily Injury by Disease $500,000 (Each Employee)

● Bodily Injury by Disease $500,000 (Policy Limit)

Comprehensive General Liability: (including completed operations and contractual liability insurance for bodily injury, death, or property damages)

● $500,000 Per Person

● $500,000 Per Occurrence

● $1,000,000 Aggregate Policy Limits

Comprehensive Automobile and Auto Liability: (covering owned, hired, leased, and non-owned vehicles)

● Bodily Injury (Including Death)

● $500,000 Per Person

● $500,000 Per Occurrence

● Property Damage

● $500,000 Per Person

● $500,000 Per Occurrence

Please upload a copy of your Certificate of insurance here.

*Response required

8. Pricing Proposal

BID FORM

Line Item Description Quantity Unit of

Measure Unit Cost Total

1 Wastewater Decanter Centrifuge, Complete In Place As Specified 1 Lump Sum

TOTAL

8. Pricing Proposal