B08_-_Attachment_1_-_Specifications.docx

Yellowstone National Park (YELL) is seeking quotes to replace Canyon sewer lift station pumps and control panel.

Existing Yeomans brand pumps have failed, and identical replacement pumps are not available.

Delivery Deadline will November 15, 2023. YELL needs to complete installation work before winter over snow travel begins to this remote park interior location in mid-December.

Delivery address: Attention: Jason Murphy, Mammoth Supply Center 22 Stable Street, Yellowstone National Park, WY 82190 Existing Pumps Specifications and Site electrical conditions:

· Yeoman Chicago Corporation 9812131-C Model #4073

· Frame 140, 3 HP,1734 RPM, 1 phase, 230 Volts, 12.7/6.35 Amps

· Site Voltage is 1 phase/ 240 Volts.

Yellowstone seeks Brand Name or equal to:

· Grundfos SL1 3 HP Submersible Sewer Pumps (Quantity 2) and Pump Control Panel (Quantity 1)

· SL1.30. A40 .30.EX.4.61R.C PUMP (Pump Specification)

(1) Pump will pass 3-inch spherical solids.

(2) Pump outlet will be ANSI 4-inch.

(3) Explosion proof pump casing

· Temporary Ring stand 4” ANSI, NPT 4” connection to Cast Iron (CI)

· 4-inch SL1/SLV to EL (existing dual rail pump system)

· Brand Name or Equal to Grundfos LC241 control panel. Single phase to 3 phase power converting drive (Existing power on site is single phase.) Pump control panel must convert single phase to three phase power.

· Level control will be supplied with primary level control will be pressure transducer with 5 float independent backup, Low Level Alarm, Pump On Lead, Pump On Lag, Pump Off, and High level alarm float.

· Quoted pumps must be compatible with existing pump guide rails.

1) Temporary ring stand will be supplied to be used while guide rail brackets are fabricated. Existing rail systems is a double rail system. YELL will use existing slide rail clamp to fit fabricated bracket for using existing guide rail system.

2) The pump shall be designed to operate continuously for an extended periods at any point in the allowable operating range (AOR) of the curve without cavitation, overheating or excessive vibration. Major pump components including casing, impellers, motor frame shall be of at minimum Class 35B cast iron with smooth surfaces devoid of blowholes or other irregularities.

3) All exposed nuts or bolts shall be 316 stainless steel. All metal surfaces coming into contact with the pumped media, other than stainless steel, shall be protected by a factory applied impact-resistance powder coating finish on the exterior of the pump.

a) Critical mating surfaces where watertight sealing is required shall be machined and fitted with NBR O-rings. Joint sealing will be the result of controlled compression of rubber O-rings in two planes and O-ring contact of four sides without the requirement of a specific torque limit. Rectangular cross-sectioned gaskets requiring specific torque limits to achieve compression shall not be considered as adequate or equal.

4) Pump shaft shall be stainless steel. Pump and motor shall be shipped from the factory as a finished product. Pumps that are assembled outside of the manufacture’s facility are not allowed.

a) The power cable shall be sized in accordance with NEC and IEC standards and shall be 49 feet and available in longer optional sizes. The outer jacket of the cable shall be oil resistant chloroprene rubber.

5) The pump shall be equipped with a leak-proof stainless steel cable plug where the unscreened conductors of the cable are cast into the plug by means of a two-component sealant to prevent moisture from entering the motor via the cable core.

6) The pump cable end (plug) is fastened with a union nut and O-ring to provide sealing against liquid penetration and shall incorporate in its design the ability to quick disconnect the power cable from the pump without the need to enter the pump. This cable plug shall allow the same plug be

a) The pump motor shall be an induction type, Premium Efficient IE3 compliant motor component design with a squirrel cage rotor, shell type design, housed in an air filled, watertight chamber according to IEC class IP 68 and NEMA MG1, part 31 for operation with variable frequency drive. Stator housing to be ASTM A-48 Class 35B. Oil filled motors shall not be considered acceptable or equal. Motors less than IE3 standard rating shall not be acceptable.

b) The motor shall be explosion proof and inverter duty rated Factory Mutual approved for use in Class 1, Division 1, Group C & D T4, T3C hazardous areas. The stator windings and stator leads shall be insulated with moisture resistant Class H insulation rated for 356°F (180°C). UL approved motors shall not be acceptable.

c) The stator shall be trickle impregnated and heat shrunk fitted into the cast iron stator housing. The use of bolts, pins or other fastening devices requiring penetration of the stator housing is not acceptable. The motor shall be designed for continuous duty handling pumped media of 104°F (40°C) and capable of up to 20 spaced starts per hour.

d) The motor shall have voltage tolerance of plus or minus 10%. The motor shall be designed for operation up to 104°F (40°C) ambient temperature, with a temperature rise of class A.

e) The motor horsepower shall be adequate so that the pump is non-overloading throughout the entire pump performance curve from shut-off through run-out. Service factor shall be 1.15 and indicated on the pump performance data sheet and the nameplate.

7) BEARINGS

a) The pump shaft shall rotate on two bearings. Motor bearings shall be grease lubricated for the life of the bearing. The upper motor bearing and the lower bearings shall compensate for axial thrust and radial forces and shall consist of a roller bearing and angular contact ball bearing.

b) Main bearing is a double-row angular contact ball bearing and support bearing is a single-row deep groove ball bearing.

c) Minimum bearing life shall be L10, 50,000 hours within the AOR.

8) MECHANICAL SEALS

a) The double mechanical seal with primary and secondary seal built into one unit shall be a cartridge style encased in an EN 1.4408/AISI 316 stainless steel housing. Separate upper and lower seals not built together in one unit shall not be acceptable.

b) Primary seal faces shall be silicon carbide / silicon carbide and secondary seal faces shall be

c) carbon / ceramic.

9) PUMP SHAFT

a) Pump shaft must have a short overhang and be dynamically balanced to eliminate shaft deflection. Pump shaft shall be duplex stainless steel EN 1.4462 / UNS S31803 to retain better corrosion resistance and tensile strength. Duplex stainless steel shaft shall have superior chemical resistance properties for Municipal or Industrial applications.

10) IMPELLER

a) The enclosed single channel vaneless tube style impeller shall be of heavy duty cast iron ASTM A48 class 35B. The impeller shall not have any leading edges so clogging is prevented in the impeller. Impellers with leading edges shall not be allowed. The impeller shall be wet balanced by means of the hydraulic forces calculated into the design of the impeller and performed according to the measuring principles of ISO 21940. This balancing is in compliance to ANSI/HI 11.6 Declaration letter can be provided upon request. All other impellers that are dry balanced shall not be acceptable.

b) Single channel tube impellers shall be fitted with a stainless steel removable wear ring that is threaded to improve fiber handling and enhanced wear resistance on the sealing system. Cast iron wear rings or insert rings shall not be acceptable.

11) VOLUTE

a) The pump volute shall be a single piece cast iron, ASTM A48, Class 35B, with stainless steel stationary ring, with smooth passages large enough to pass any solids that may enter the impeller. Minimum thru let shall be inches. Pump housing and motor housing shall be fastened together by a 316 stainless steel clamp in lieu of bolts for easy serviceability. The volute shall have a curved ring on the labyrinth and a threaded sealing system improve wear resistance while leading fibers into the volute and away from the sealing gap. Cast iron wear rings or insert rings shall not be acceptable.

12) LIFTING BAIL

a) Lifting bail shall be cast stainless steel bolted to the top of the pump. Bail shall be constructed so that the pump is in proper position to connect to elbow.

13) 2.12 PUMP PROTECTION

14) Each pump shall incorporate three thermal switches, one per stator phase wind and be connected in series, to monitor the temperature of the motor. Should the thermal switches open, the motor shall be stopped and an alarm indication shall be activated.

15) Pumps shall have one normally closed moisture switch. The moisture switches shall be incorporated into the pump to sense moisture in the bottom of the stator housing. The switch shall be wired in series so that if a switch opens the motor is de-energized and the pump is stopped. Conductive type probes for measuring moisture placed in oil shall not be accepted.

16) SURFACE FINISH

a) Pump is coated with a smooth and easy to clean surface to enable wash off of sedimentation and impurities. The primer to all cast iron surfaces has a Cathodic electro-deposition protection. The surface coating is a two part component powder coating thickness of 100-150 µm. Pump coatings that do not utilize a primer or use water-alkalized base paint shall not be acceptable.