# DIBBS #SPE7MC-26-T-270L

DLA Solicitation for Check and Relief Valves for Detroit Diesel Engines

**Posted:** September 11, 2026
**Respond By:** September 21, 2026
**Identifier:** SPE7MC-26-T-270L
**NAICS:** 336310

The Defense Logistics Agency (DLA) Land and Maritime, Maritime Hardware/Electrical office is soliciting bids for check and relief valves for Detroit Diesel Model 3-53 and 6V53T engines.
- Government Buyer:
  - Defense Logistics Agency (DLA)
  - DLA Land and Maritime
  - Maritime Hardware/Electrical office
- OEMs and Vendors:
  - Essex Industries, Inc. (approved source, part number K-2778)
  - Colony Machine and Tool Inc. (approved source, part number CR 501-1)
- Products Requested:
  - Valve, Check and Relief
    - NSN: 4820-00-152-6195
    - Part numbers: K-2778 (Essex Industries), CR 501-1 (Colony Machine and Tool)
    - Quantity: 201 units
    - For Detroit Diesel Model 3-53, 6V53T engines
    - Technical specs: Temperature range -65°F to 200°F; Operating pressure 0-10 PSI; Burst pressure 80 PSI; Back pressure 40 PSI; Cracking pressure check 1.0 PSI max; Relief 3.5-4.5 PSI max; Air flow check 2 CFM min at 4 PSI; Relief 0.5 CFM min at 4.5 PSI
- Unique/Notable Requirements:
  - Strict compliance with domestic sourcing laws (Berry Amendment, Buy American Act)
  - Prohibition on covered defense telecommunications equipment
  - Critical application item
  - Delivery required within 141 days from award, FOB Origin

### Description

VALVE, CHECK (QTY: 201, NSN: 4820-00-152-6195, Purchase Request: 7010938895)
  Approved Sources:
  - CAGE: 55469, Part No: K-2778, Company: ESSEX INDUSTRIES, INC.
  - CAGE: 66465, Part No: CR 501-1
  - CAGE: 83533, Part No: K-2778, Company: ESSEX INDUSTRIES INC
 

[View original listing](https://www.dibbs.bsm.dla.mil/rfq/rfqrec.aspx?sn=SPE7MC26T270L)