Qualifying_Statement_for_BC4-15_Grit_Blaster_clin1_r2.docx

Qualifying Statement for Goff BC4-15 Grit Blaster (CLIN 1) – Attachment 0001 Dated: 24-Oct-17, Revision: 2

Name: Grit Blaster Model Number: BC4-15 Manufacturer: Goff, Inc.

Qty: 1

Scope This qualifying statement covers the information and requirements for this grit blaster.

System Features

· Blast Cabinet

· Wear resistant enclosure for blast cleaning and surface preparation for bombs up to 8 feet tall

· Collects the abrasive and contaminant for recycling through the reclaim system

· Fully cast lined

· Seals

· Contains blast media within the blast cabinet

· Each vestibule both entry and exit have 3 sets of externally removable finger seals and 2 sets of Urethane curtains

· Dual bucket elevator system

· Vertically conveys the abrasive and contaminants received from the blast cabinet screw conveyor

· Deposits the abrasive into the rotary screen to remove large debris and contaminates into a waste container

· Abrasive passes through the rotary screen and enters the air wash separator for final cleansing and removal of fines and broken down abrasive material

· Abrasive is then discharged into the abrasive storage hopper for reuse

· Heavy duty shaft and bearing with shaft mounted direct drive

· Hollow bore reducer

· Reinforced four-ply elevator belt

· Cast malleable iron elevator buckets

· Airwash separator

· Receives used abrasive and fine contaminants passing from the rotary screen

· Curtain coupled with the vacuum from the dust collector removes dust, mill scale and small abrasive fines from the abrasive operating mix

· Waste particles fed to a refuse container at floor level

· Lighter contaminants and dust are pneumatically conveyed to the dust collector

· Accessible by the service platform

· Abrasive storage hopper

· Stores and provides a sufficient constant and consistent supply of abrasive to supply the blast wheels

· Equipped with a level sensor to automatically detect when abrasive is low

· Automatically actuates a valve in the abrasive adder hopper to meter new abrasive into the mix

· Abrasive feed pipes

· Provides a steady supply of abrasive media to the abrasive feed gates

· Blow off system

· Blows the dust, abrasive and scale off of the flat top of the bomb body

· Includes the hardware, duct, flex hose and mounting clamps and pipes

· Electrical control panel

· Allows the monitoring and control of the machine electrical and electro-mechanical components

· Motor starters and selector switches

· Hour meter for recording total blasting hours

· Fused mainline disconnect switch

· Individual ammeter for each blast wheel

· Line fuses and overload protection

· Pre-wired to terminal strip

· Control Panel Air Conditioner

· Dust collector

· Maintains a negative static pressure in the blasting cleaning system

· Provides ventilation and evacuation of dust from the blast cabinet

· Provides controlled velocity airflow through the airwash separator for removal of fine contaminants from the abrasive operating mix

· Designed for Standard Distance Ductwork runs (<75’)

Equipment Specifications

· Blast Cabinet

· 3/8” thick manganese steel blast chamber

· ½” premium chrome replaceable cast liners in line with the blast streams on the wall opposite blast wheels

· Pit design matches existing pit

· Accepts current single beam loop monorail system and spinner

· 4 blast wheels

· Dual Automatic Split Pneumatic Powered Doors at both Vestibule Ends

· Both doors to be controlled by operator

· Dual bucket elevator system

· 1/8” and 3/16” thick carbon steel construction

· Rugged-lagged head pulleys with integral shaft

· Heavy duty pillow block bearings

· Access doors for ease of access and maintenance

· Airwash separator

· Single 30” airwash separator

· Abrasive storage hopper

· 3/16” thick carbon steel plate

· Abrasive feed pipes

· 3” inside diameter

· Reinforced pure gum rubber hose

· Blast wheels

· Blast wheels

· 8 blades

· 15” blade diameter

· 3” wide

· Chrome alloy construction

· Heat treated for hardness and long life wear

· Motor

· Four total, 20 HP each

· 3600 RPM

· C-Faced direct drive

· Direct mounted

· Variable Speed Controller

· (1) 80 HP VFD to control Blast Wheel RPM of all (4) four Blast Wheels

· Wheel Housing

· ¼” thick steel housing

· Internally lined with premium alloy cast tops and end liners

· Impeller

· Conical inlet type cast of premium alloy

· Control cage

· Adjustable for angular discharge

· Cast of premium alloy

· Blow off system

· 3 air cannons to target the flat surface of the bomb body

· 96” air knife to blow down the side of the bomb body as it rotates

· Dust collector

· Model: DFE 3-12/25 sized for std. distance ducting (<75’)

· 25 HP Backwards Inclined Fan

· Ultra-Web Cartridge Filter Media

· Airflow Controller has Variable Frequency Drive

· Delta P Cleaning Control maintains constant Static Pressure

· Clearance under Hopper Flange 68"

· NEMA 4 Enclosure

· Photohelic Pressure Gauge

· Explosion Relief Panel 34" x 46"

· Leg Extensions

· Hopper Drum Cover w Slide Gate and Latches

· Ground Test Documented

· Aluminum Fan Wheel

· Outlet Silencer Damper

· 8 x 8 Airlock- NFPA 68 (Venting) & NFPA 69 (Isolation)

· 16" EcoMaxx No Return Valve w Locking Mechanism and

· Flanged Ends w Co-Flanges, ATEX Certified EN 16447

· Microswitching for NRV Included

· Control Panel with Status Lights- Green OK/ Red Trouble

· Dust Level Sensor (Capacitive) Ensures NRV is not compromised

· Control Panel NEMA 12 Enclosure

· Motor Starter for Airlock to enable Delay Timer

· Dry set of Contacts for remote Start/Stop

· Shot Trap

· Inline Trap between Blast Cabinet and Dust Collector that captures abrasive that may have been pulled out of cabinet by Dust Collector and prevents it from staying in Ductwork or traveling to Dust Collector

General System Electrical Features and Requirements

· Electrical control panel

· 460 volt, 3 phase, 60 cycle

· Machine electrical wiring

· Prewired prior to installation

· Terminated to the terminal strip in the control panel

· In accordance with NEC standards

· BC4-15 ventilation requirements

· 6,500 CFM at 4,500 FPM @16” W.C.

· Exhaust fan ventilation requirements

· 6,500 CFM at 4,500 FPM at 16” W.G.

Additional Requirements

· All manual documentation to be provided

· Maintenance, operation and spare parts

· Equipment engineering drawings to be provided

· Maintenance platform and ladder access

· 4 meter heavy duty duct between NRV and dust collector

· Installation supervision to be included in quote

· Number of man days required TBD

· Technical assistance upon set-up

· 48” on clearance is required below the rotary valve on the dust collector

Detailed description required prior to award The MCAAP Engineering Support Division will validate and verify/approve the Contractor’s listed equipment concept before award is granted. In order to meet this review requirement, the Offeror shall submit with their proposal a detailed technical description of the grit blaster. The Offeror’s description submittal shall account for each one of the required product features located in this Qualifying Statement. The description shall also clearly portray/describe how the grit blaster will function. Conceptual drawings that are not detail “as built” drawings are recommended but not required for submittal with the detailed description.