PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18550Valve,safety Relief

Leroi International Inc Dba Compair Leroi · NSN 4820-01-157-5399 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-157-5399 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-157-5399. Primary manufacturer part number: 18550.
Features
  • Valve,safety Relief — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Leroi International Inc Dba Compair Leroi
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-157-5399, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leroi International Inc Dba Compair Leroi. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-157-5399
Primary Part Number18550
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeroi International Inc Dba Compair Leroi
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5360-00-664-787611-414 INTERCHANGEABLE
Spring,helical,compression
Thermo King Corporation Dba Phoenix Global Distirbution.
5935-00-666-1434WK6-21C3-8 INTERCHANGEABLE
Connector,plug,electrical
Pei/genesis, Inc. Div Pei Genesis
6625-00-691-650518550 INTERCHANGEABLE
Plate,clamp
Cec Vibration Products, Llc Dba Cec Vibrations Products
4130-01-459-2412800-48TP240V INTERCHANGEABLE
Vacu-Disc
Dcm Clean Air Products, Inc.
4710-01-496-8480 INTERCHANGEABLE
Tube Assembly,metal
7025-01-499-4333TLS2200 INTERCHANGEABLE
Printer,automatic Data Processin
Brady Worldwide Inc
4820-01-514-169918.5.50 INTERCHANGEABLE
Disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
6515-01-573-2840 INTERCHANGEABLE
Steri-Strip
6515-01-587-6297930103 INTERCHANGEABLE
Applicator,disposable
Becton, Dickinson and Co Dba Becton Dickinson & Co
Cross-Reference Index
Part NumberManufacturer
18550 PRIMARY Leroi International Inc Dba Compair Leroi (USA)
18550 Compair Kellogg Div of Robertshaw Controls Co (USA)
Related Parts
5360-00-664-7876INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
11-414
5935-00-666-1434INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
WK6-21C3-8
6625-00-691-6505INTERCHANGEABLE
PLATE,CLAMP
18550
4130-01-459-2412INTERCHANGEABLE
VACU-DISC
800-48TP240V
4710-01-496-8480INTERCHANGEABLE
TUBE ASSEMBLY,METAL
7025-01-499-4333INTERCHANGEABLE
PRINTER,AUTOMATIC DATA PROCESSIN
TLS2200
4820-01-514-1699INTERCHANGEABLE
DISK,VALVE
18.5.50
6515-01-573-2840INTERCHANGEABLE
STERI-STRIP
6515-01-587-6297INTERCHANGEABLE
APPLICATOR,DISPOSABLE
930103

Frequently Asked Questions

What is NSN 4820-01-157-5399?

NSN 4820-01-157-5399 is a Valve,safety Relief, manufactured by Leroi International Inc Dba Compair Leroi, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-157-5399?

NSN 4820-01-157-5399 has 2 cross-referenced part numbers: 18550 (Leroi International Inc Dba Compair Leroi), 18550 (Compair Kellogg Div of Robertshaw Controls Co).

What NSN replaces 4820-01-157-5399?

There are 9 known substitutes for 4820-01-157-5399: 5360-00-664-7876, 5935-00-666-1434, 6625-00-691-6505 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18550?

Key specifications for 18550: End Item Identification: 1905-01-031-6077. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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