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MC7543-1 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

MC7543-1: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A FIRST END A, connection_style: FLARED (TUBE) FIRST END, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND FIRST END, operating_pressure: 290.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-034-5877, 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
MC7543-1
NSN: 4820-00-034-5877
FSC: 4820 — Valves, Nonpowered
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES FIRST END
thread_class3A FIRST END A
connection_styleFLARED (TUBE) FIRST END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND FIRST END
operating_pressure290.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_devicePOPPET
nominal_thread_size0.437 INCHES FIRST END IN
valve_operation_methodAUTOMATIC
media_for_which_designedAIR SINGLE RESPONSE
opening_pressure_setting23.0 POUNDS PER SQUARE INCH LBS
NSN4820-00-034-5877
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: MC7543-1 · 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
•
CONNECTION STYLE: FLARED (TUBE) FIRST END
•
STYLE DESIGNATOR: STRAIGHT THRU
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
•
OPERATING PRESSURE: 290.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
NOMINAL THREAD SIZE: 0.437 INCHES FIRST END IN
•
SEAT ANGLE: 37.0 DEGREES FIRST END
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEPOPPET
CONNECTION STYLEFLARED (TUBE) FIRST END
STYLE DESIGNATORSTRAIGHT THRU
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
OPERATING PRESSURE290.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD DIRECTIONRIGHT-HAND FIRST END
NOMINAL THREAD SIZE0.437 INCHES FIRST END IN
SEAT ANGLE37.0 DEGREES FIRST END
DISK LOADING METHODSPRING
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
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 1
53-720057-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is MC7543-1?
MC7543-1 is a VALVE,SAFETY RELIEF.
What parts can replace MC7543-1?
There is 1 known substitute for MC7543-1: 53-720057-1. Substitute compatibility should be verified for your specific system.
What is the NSN for MC7543-1?
MC7543-1 is cataloged in the U.S. Government catalog under NSN 4820-00-034-5877. This indicates validated use in U.S. government and defense supply chains.
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