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1870-37 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1870-37: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061, design_type: FRICTION, special_features: PLUG, GEARBOX, features_provided: GASKET AND SHOULDER, end_item_identification: TGRI 50011 RADAR TYPE 93, material_document_and_classification: ASTM B221 ASSN STD SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-678-0268, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
1870-37
NSN: 4820-00-678-0268
NIINs: 006780268, 014922681
FSC: 4820 — Valves, Nonpowered
CAGE: 24658 — GENERAL REGULATOR CORP. DBA ACCUDRIV (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061
design_typeFRICTION
special_featuresPLUG, GEARBOX
features_providedGASKET AND SHOULDER
end_item_identificationTGRI 50011 RADAR TYPE 93
material_document_and_classificationASTM B221 ASSN STD SINGLE MATERIAL RESPONSE
opening_inside_diameter_for_which_designed7.870 INCHES MINIMUM AND 7.874 INCHES MAXIMUM IN
surface_treatment_document_and_classificationMIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE
NSN4820-00-678-0268
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1870-37 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTSIDE DIAMETER: 3.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT
•
MATERIAL THICKNESS: 0.007 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.188 INCHES NOMINAL IN
•
MATERIAL: RUBBER FABRIC REINFORCED
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER3.250 INCHES NOMINAL IN
STYLE DESIGNATORFLAT
MATERIAL THICKNESS0.007 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.188 INCHES NOMINAL IN
MATERIALRUBBER FABRIC REINFORCED
SUBSTITUTES & CROSS-REFERENCES 1
81393-01Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1870-37?
1870-37 is a DIAPHRAGM,VALVE,FLAT.
What parts can replace 1870-37?
There is 1 known substitute for 1870-37: 81393-01. Substitute compatibility should be verified for your specific system.
What is the NSN for 1870-37?
1870-37 is cataloged in the U.S. Government catalog under NSN 4820-00-678-0268. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.