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DD421S61-54PC18 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

DD421S61-54PC18: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, flange_shape: ROUND WITH HOLES FIRST END, connection_type: FLANGE FIRST END, style_designator: ANGLE, nominal_thickness: 0.500 INCHES FIRST END IN, bolt_hole_quantity: 6 FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-288-6935, 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
DD421S61-54PC18
NSN: 4820-00-288-6935
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
flange_shapeROUND WITH HOLES FIRST END
connection_typeFLANGE FIRST END
style_designatorANGLE
nominal_thickness0.500 INCHES FIRST END IN
bolt_hole_quantity6 FIRST END
flange_face_designPLAIN FIRST END
operating_pressure100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_devicePOPPET
maximum_operating_temp425.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_methodAUTOMATIC
NSN4820-00-288-6935
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: DD421S61-54PC18 · 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: POPPET
•
FLANGE SHAPE: ROUND WITH HOLES FIRST END
•
FLANGE FACE DESIGN: PLAIN FIRST END
•
BOLT CIRCLE NOMINAL DIAMETER: 4.438 INCHES FIRST END IN
•
CONNECTION TYPE: FLANGE FIRST END
•
STYLE DESIGNATOR: ANGLE
•
BOLT HOLE NOMINAL DIAMETER: 0.562 INCHES FIRST END IN
•
OPERATING PRESSURE: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEPOPPET
FLANGE SHAPEROUND WITH HOLES FIRST END
FLANGE FACE DESIGNPLAIN FIRST END
BOLT CIRCLE NOMINAL DIAMETER4.438 INCHES FIRST END IN
CONNECTION TYPEFLANGE FIRST END
STYLE DESIGNATORANGLE
BOLT HOLE NOMINAL DIAMETER0.562 INCHES FIRST END IN
OPERATING PRESSURE100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
ADJUSTABLE PRESSURE RANGE+4.5 TO 5.5 POUNDS PER SQUARE INCH LBS
MAXIMUM OPERATING TEMP425.0 FAHRENHEIT SINGLE RESPONSE DEGF
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 3
1709FReference document
Same NSN cross-reference
Reference document — Secondary reference
5544110-18Reference document
Same NSN cross-reference
Reference document — Secondary reference
W5544110PC18Reference 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 DD421S61-54PC18?
DD421S61-54PC18 is a VALVE,SAFETY RELIEF.
What parts can replace DD421S61-54PC18?
There are 3 known substitutes for DD421S61-54PC18: 1709F, 5544110-18, W5544110PC18. Substitute compatibility should be verified for your specific system.
What is the NSN for DD421S61-54PC18?
DD421S61-54PC18 is cataloged in the U.S. Government catalog under NSN 4820-00-288-6935. This indicates validated use in U.S. government and defense supply chains.
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