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1856M-OL — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1856M-OL: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY FLOW CONTROL DEVICE, bonnet_type: INSIDE SCREW, connection_type: THREADED INTERNAL PIPE SECOND END, connection_style: PLAIN,OPTIONAL END(PIPE) SECOND END, style_designator: ANGLE, thread_direction: RIGHT-HAND ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-325-6944, 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
1856M-OL
NSN: 4820-01-325-6944
FSC: 4820 — Valves, Nonpowered
CAGE: 72352 — CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS (USA)
SPECIFICATIONS
materialCOPPER ALLOY FLOW CONTROL DEVICE
bonnet_typeINSIDE SCREW
connection_typeTHREADED INTERNAL PIPE SECOND END
connection_stylePLAIN,OPTIONAL END(PIPE) SECOND END
style_designatorANGLE
thread_directionRIGHT-HAND ALL ENDS
flow_control_deviceDISK
nominal_thread_size2.500 INCHES SECOND END IN
valve_operation_methodAUTOMATIC
bonnet_attachment_methodTHREADED
media_for_which_designedAIR SINGLE RESPONSE
thread_series_designatorNPT ALL ENDS
NSN4820-01-325-6944
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1856M-OL · 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 CONTROL DEVICE: DISK
•
CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) SECOND END
•
CONNECTION TYPE: THREADED INTERNAL PIPE SECOND END
•
STYLE DESIGNATOR: ANGLE
•
ADJUSTABLE PRESSURE RANGE: +130.0 TO 144.0 POUNDS PER SQUARE INCH LBS
•
BONNET TYPE: INSIDE SCREW
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) SECOND END
CONNECTION STYLEPLAIN (PIPE) FIRST END
CONNECTION TYPETHREADED INTERNAL PIPE SECOND END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
STYLE DESIGNATORANGLE
ADJUSTABLE PRESSURE RANGE+130.0 TO 144.0 POUNDS PER SQUARE INCH LBS
BONNET TYPEINSIDE SCREW
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE2.000 INCHES FIRST END IN
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 2
18252-F 2IN 130T144PSIReference document
Same NSN cross-reference
Reference document — Secondary reference
1856M-02Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1856M-OL?
1856M-OL is a VALVE,SAFETY RELIEF.
What parts can replace 1856M-OL?
There are 2 known substitutes for 1856M-OL: 18252-F 2IN 130T144PSI, 1856M-02. Substitute compatibility should be verified for your specific system.
What is the NSN for 1856M-OL?
1856M-OL is cataloged in the U.S. Government catalog under NSN 4820-01-325-6944. This indicates validated use in U.S. government and defense supply chains.
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