PartsTable
Technical Data Sheet
203-C-303 ✓ 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

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 product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-019-4790, 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
FSC: 4820
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
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
RP-800-S-2Interchangeable
interchangeable cross-reference
interchangeable
203-C-303Interchangeable
interchangeable cross-reference
interchangeable
RP-800-S-4Interchangeable
interchangeable cross-reference
interchangeable
007117Interchangeable
interchangeable cross-reference
interchangeable
203-C-303-ITEM 24Interchangeable
Same NIIN cross-reference
interchangeable
203-C-303-ITEMInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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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 7 known substitutes for 203-C-303: RP-800-S-2, 203-C-303, RP-800-S-4 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 203-C-303?
203-C-303 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-019-4790. This indicates validated use in U.S. government and defense supply chains.
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