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Technical Data Sheet
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GRS50 ✓ 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,LINEAR,DIRECTIONAL CONTROL. Key specifications include body_material: STEEL, special_features: FURNISHED ITEM KNOB. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-986-6972, 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
GRS50
NSN: 4820-00-986-6972
FSC: 4820
CAGE: 02249 — PARKER HANNIFIN CORPORATION DBA GRESEN HYDRAULICS DIV HYDRAULIC VALVE DIVISION (USA)
SPECIFICATIONS
body_materialSTEEL
special_featuresFURNISHED ITEM KNOB
flow_pattern_quantity2
NSN4820-00-986-6972
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: GRS50 · 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
•
FLOW PATTERN QUANTITY: 2
•
BODY MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
FLOW PATTERN QUANTITY2
BODY MATERIALSTEEL
SPECIAL FEATURESFURNISHED ITEM KNOB
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
177039-65Interchangeable
interchangeable cross-reference
interchangeable
F12Interchangeable
interchangeable cross-reference
interchangeable
F12X1Interchangeable
interchangeable cross-reference
interchangeable
G322-050-011Interchangeable
interchangeable cross-reference
interchangeable
S8Interchangeable
interchangeable cross-reference
interchangeable
155971G1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GRS50?
GRS50 is a VALVE,LINEAR,DIRECTIONAL CONTROL.
What parts can replace GRS50?
There are 23 known substitutes for GRS50: 177039-65, F12, F12X1 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GRS50?
GRS50 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-986-6972. 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