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PartsTable / COMPONENT / 31638 PIECE 4
31638 PIECE 4 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

VALVE,REGULATING,FLUID PRESSURE. Key specifications include guide: NOT INCLUDED, diameter: 0.328 INCHES NOMINAL IN, material: STEEL CUTTING EDGE TIP, lens_type: CONVEX, KNURLED SINGLE LIGHT FIRST POSITION HORIZONTAL, body_width: 2.875 INCHES NOMINAL IN, flute_type: INTEGRAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-216-1126, 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
31638 PIECE 4
NSN: 4820-01-216-1126
FSC: 4820
CAGE: 86184 — GRISWOLD INDUSTRIES DBA CLA-VAL CO (USA)
SPECIFICATIONS
guideNOT INCLUDED
diameter0.328 INCHES NOMINAL IN
materialSTEEL CUTTING EDGE TIP
lens_typeCONVEX, KNURLED SINGLE LIGHT FIRST POSITION HORIZONTAL
body_width2.875 INCHES NOMINAL IN
flute_typeINTEGRAL
lens_colorCOLORLESS SINGLE LIGHT FIRST POSITION HORIZONTAL
shank_typeSTRAIGHT
body_height3.812 INCHES NOMINAL IN
body_length3.094 INCHES NOMINAL IN
reamer_typeFLUTED CHUCKING
flute_designHELICAL
NSN4820-01-216-1126
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 31638 PIECE 4 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
31638Interchangeable
interchangeable cross-reference
interchangeable
51206-117Interchangeable
interchangeable cross-reference
interchangeable
51-0206-0117-301Interchangeable
interchangeable cross-reference
interchangeable
31638-00AInterchangeable
interchangeable cross-reference
interchangeable
73200PC2Interchangeable
interchangeable cross-reference
interchangeable
E2894PC57-62D1A328Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31638 PIECE 4?
31638 PIECE 4 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace 31638 PIECE 4?
There are 19 known substitutes for 31638 PIECE 4: 31638, 51206-117, 51-0206-0117-301 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31638 PIECE 4?
31638 PIECE 4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-216-1126. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026