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203-C-303 — PILOT,RELIEF VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

203-C-303: PILOT,RELIEF VALVE.

The PILOT,RELIEF VALVE is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, style_designator: ANGLE, thread_direction: RIGHT-HAND ALL ENDS, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-019-4790, 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
203-C-303
NSN: 4820-01-019-4790
NIINs: 010194790, 010774867
FSC: 4820 — Valves, Nonpowered
CAGE: 09990 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV HYDRAULIC VALVE DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
style_designatorANGLE
thread_directionRIGHT-HAND ALL ENDS
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
flow_control_devicePISTON
nominal_thread_size0.500 INCHES ALL ENDS IN
valve_operation_methodAUTOMATIC
media_for_which_designedOIL SINGLE RESPONSE
thread_series_designatorNPTF ALL ENDS
adjustable_pressure_range+2500.0 TO 3000.0 POUNDS PER SQUARE INCH LBS
NSN4820-01-019-4790
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 203-C-303 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL
SUBSTITUTES & CROSS-REFERENCES 3
203-C-303-ITEM 24Reference document
Same NSN cross-reference
Reference document — Secondary reference
203-C-303-ITEMReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
7-A-117Reference document
Same NSN cross-reference
Reference document — Secondary 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 203-C-303?
203-C-303 is a PILOT,RELIEF VALVE.
What parts can replace 203-C-303?
There are 3 known substitutes for 203-C-303: 203-C-303-ITEM 24, 203-C-303-ITEM, 7-A-117. Substitute compatibility should be verified for your specific system.
What is the NSN for 203-C-303?
203-C-303 is cataloged in the U.S. Government catalog under NSN 4820-01-019-4790. This indicates validated use in U.S. government and defense supply chains.
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