PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

CRXL1.25KRVParts Kit,safety Relief Valve

Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer · NSN 4820-01-478-2874 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-478-2874 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-478-2874. Primary manufacturer part number: CRXL1.25KRV.
Features
  • Parts Kit,safety Relief Valve — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-01-478-2874, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-478-2874
Primary Part NumberCRXL1.25KRV
Item NameParts Kit,safety Relief Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerDover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5950-00-005-2525920011-17 INTERCHANGEABLE
Coil,radio Frequency
Raytheon Company Dba Raytheon
6625-00-938-8099MK827USM118 INTERCHANGEABLE
Test Set,electron Tube
Joint Electronics Type Designation System
4820-01-495-4012100573 INTERCHANGEABLE
Cock,drain
Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba
5330-01-660-8525100573 INTERCHANGEABLE
Seal,plain Encased
A V Technology Llc
Cross-Reference Index
Part NumberManufacturer
100573 Ams Instrumentation & Control Limited (GBR)
CRXL1.25KRV PRIMARY Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA)
Related Parts
5950-00-005-2525INTERCHANGEABLE
COIL,RADIO FREQUENCY
920011-17
6625-00-938-8099INTERCHANGEABLE
TEST SET,ELECTRON TUBE
MK827USM118
4820-01-495-4012INTERCHANGEABLE
COCK,DRAIN
100573
5330-01-660-8525INTERCHANGEABLE
SEAL,PLAIN ENCASED
100573

Frequently Asked Questions

What is NSN 4820-01-478-2874?

NSN 4820-01-478-2874 is a Parts Kit,safety Relief Valve, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-478-2874?

NSN 4820-01-478-2874 has 2 cross-referenced part numbers: 100573 (Ams Instrumentation & Control Limited), CRXL1.25KRV (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).

What NSN replaces 4820-01-478-2874?

There are 4 known substitutes for 4820-01-478-2874: 5950-00-005-2525, 6625-00-938-8099, 4820-01-495-4012 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of CRXL1.25KRV?

Key specifications for CRXL1.25KRV: Special Features: PART OF AVCAT-TEST AND STRIPPING MODULE. 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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