SOW NORTHLAND AUX and ER Supply Fans.pdf
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- Solicitation number
- 52000QR270000033
- Issued by
- Not on record
About this file
This is a Statement of Work (SOW) for the complete overhaul, rewind, mechanical repair, testing, and reconditioning of two vane axial ventilation fans for the USCGC Northland. The contractor must provide all labor, materials, equipment, and transportation for pickup, rebuild, testing, and delivery services. Both fans are located at US Coast Guard Base, 4000 Coast Guard Boulevard, Portsmouth, VA 23703, serving as both pickup and delivery locations.
The SOW specifies two distinct fan assemblies requiring rebuild: the AX3A4W6 auxiliary supply fan (NSN 4140-00-289-8863) with 21.125-inch housing diameter, 3,000 CFM airflow, 3.0 horsepower, 1,750 RPM, and 440V AC three-phase 60 Hz electrical specifications; and the AX28A4W6 engine room fan (NSN 4140-00-289-8894) with 36-inch housing diameter, 28,000 CFM airflow, 25/7 horsepower, 1,800/1,200 RPM dual rating, and matching 440V AC three-phase 60 Hz specifications. Work must follow six logical phases: transportation and initial disassembly; cleaning and detailed inspections; motor rewinding and mechanical repairs (including complete AC stator rewind, dip and bake process, endbell machining, and new bearing installation); balancing and housing reconditioning with dynamic balancing and marine-grade coatings; assembly and testing with full-load run testing and performance monitoring; and final prep and delivery. Deliverables include formal service reports documenting as-received and final electrical/mechanical test results, dynamic balancing certificates, and no-load run test reports with voltage, current, vibration, and temperature data. The period of performance is 19 October 2026 through 4 November 2026. The Coast Guard point of contact is CWO4 Steven Vanhevelingen at Steven.c.vanhevelingen@uscg.mil.
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| SOW NORTHLAND AUX and ER Supply Fans.pdf |
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Text version
STATEMENT OF WORK (SOW)
02 Vane Axial Ventilation Fans Rebuild & Reconditioning for USCGC Northland
1.0 Objective & Scope of Work
The objective of this Statement of Work (SOW) is to define the requirements for the complete overhaul, rewind, mechanical repair, testing, and reconditioning of two (2) Vane Axial Ventilation Fans. The contractor shall provide all labor, materials, equipment, and transportation necessary to pick up, rebuild, test, and deliver the completed fan assemblies back to the Coast Guard.
2.0 Places of Performance & Transportation
Pick-up Location: US Coast Guard Base, 4000 Coast Guard Blvd, Portsmouth, VA. 23703
Drop-off Location: US Coast Guard Base, 4000 Coast Guard Blvd, Portsmouth, VA. 23703
3.0 Technical Requirements & Sequence of Work
References:
2712_512_A
901-WMEC_514_2_1-L
SFLC Std Spec 6310
Aux supply fan follows the characteristics:
The AX3A4W6 vane axial fan has a nominal housing inside diameter of 21.125 inches and a nominal overall length of 29.625 inches.
• Housing Inside Diameter: 21.125 inches nominal
• Overall Length: 29.625 inches nominal
• Air Flow Rate: 3,000 Cubic Feet per Minute (CFM)
• Power Rating: 3.0 Horsepower
• Speed Rating: 1,750 RPM
• Voltage & Electrical: 440V AC, Three-Phase, 60 Hz
• National Stock Number (NSN): 4140-00-289-8863
ENG room fan has the following characteristics:
The AX28A4W6 vane axial fan has a nominal housing inside diameter of 36.000 inches and a nominal length of 50.000 inches.
• Housing Inside Diameter: 36 inches
• Overall Length: 50 inches
• Air Flow Rate: 28,000 Cubic Feet per Minute (CFM)
• Power Rating: 25/7 Horsepower
• Speed Rating: 1,800/1,200 RPM
• Voltage & Current: 440V AC, Three-Phase, 60 Hz
• National Stock Number (NSN): 4140-00-289-8894
The contractor shall perform the rebuilding services in accordance with the following logical phases:
Phase I: Transportation & Initial Disassembly
Pick-up: Safely load and transport the complete vane axial ventilation fan assemblies from Coast Guard Base Portsmouth, VA, to the contractor's repair facility.
Fan Disassembly: Disassemble the external ventilation housing and remove the internal motor and fan blade/rotating assembly.
Motor Disassembly & Initial Electrical Testing: Disassemble the AC motor assembly.
Perform preliminary electrical insulation and winding tests. Document all "as-received" electrical conditions and test results.
Phase II: Cleaning & Detailed Inspections
Electrical Inspection: Perform a detailed electrical inspection of the stator windings, connections, and terminal box. Document all findings.
Mechanical Inspection: Perform a comprehensive mechanical inspection of all physical components. Document all key measurements.
Steam Cleaning & Drying: Clean all disassembled metal parts, housings, stator, and components to remove grease, dirt, and carbon dust. Bake dry all parts in a controlled industrial oven.
Phase III: Motor Rewinding & Mechanical Repairs
AC Stator Rewinding: Perform a complete rewind of the AC stator using high-grade insulation materials to match or exceed original equipment manufacturer (OEM) specifications.
Dip & Bake Process: Submerge (dip) the newly rewound AC stator in high-quality insulating varnish, and bake dry in an oven to ensure optimal environmental sealing and winding stabilization.
Stator Clean-up: Clean up the stator core and frame after the rewind, dip, and bake cycle to remove excess varnish and ensure clean mating surfaces.
Endbell Machining: Bore and sleeve the motor endbells to restore them to the proper OEM tolerances and ensure exact alignment.
Bearing Replacement: Furnish and install brand-new, premium-grade bearings matching the original specifications.
Phase IV: Balancing & Housing Reconditioning
Dynamic Balancing: Dynamically balance the complete rotating assembly. Document the final balancing results.
Housing Preparation & Coating: Prep, prime, and paint the interior and exterior of the ventilation housing with marine-grade industrial coatings.
Phase V: Assembly, Testing, & Finishing
Motor Reassembly & Testing: Reassemble the motor with the new bearings. Perform post-assembly electrical tests and document the results.
Run Testing: Test run the motor at its full rated operating voltage. Monitor and document critical performance results, including no-load current, vibrations, and operating temperature.
Motor Painting: Prep, prime, and paint the exterior of the motor using industrial-grade protective coatings.
Final Assembly: Reinstall and align the reconditioned motor into the prepped ventilation housing. Check overall clearances and rotation.
Phase VI: Prep & Delivery
Delivery: Transport the fully reconditioned vane axial fan assembly to Coast Guard Base Portsmouth, VA.
4.0 Deliverables & Documentation
The contractor must submit a formal Service Report upon delivery of the fans, which must include the following documentation:
"As-Received" & Final Electrical and Mechanical Test Reports.
Dynamic Balancing Certificate
No-Load Run Test Report: Voltage, current draw, vibration levels, and temperature readings.
5.0 Quality Assurance & Standards
New parts, particularly bearings and wiring insulation, must meet or exceed OEM specifications.
6.0 Period of Performance
The contractor shall complete the entire scope of work, including pick-up, overhaul, testing, and final delivery within a PoP of 19 OCT26-04NOV26.
POC on NORTHLAND:
CWO4 Steven Vanhevelingen
Steven.c.vanhevelingen@uscg.mil
File details come from the government source that posted it. Updated .