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50M-203-50S — BELLOWS ASSEMBLY,VALVE,THERMOSTA

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

50M-203-50S: BELLOWS ASSEMBLY,VALVE,THERMOSTA.

BELLOWS ASSEMBLY,VALVE,THERMOSTA. Key specifications include material: NICKEL ALLOY AND COPPER ALLOY, type/model_designation: MODEL 203, end_item_identification: 4820-01-561-1771 REGULATING VALVE; NEW CONSTRUCTION LCS1, part_name_assigned_by_controlling_agency: BELLOWS ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-560-9399, 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
50M-203-50S
NSN: 4820-01-560-9399
FSC: 4820 — Valves, Nonpowered
CAGE: 21013 — METREX VALVE CORP. DBA METREX VALVE CORP (USA)
SPECIFICATIONS
materialNICKEL ALLOY AND COPPER ALLOY
type/model_designationMODEL 203
end_item_identification4820-01-561-1771 REGULATING VALVE; NEW CONSTRUCTION LCS1
part_name_assigned_by_controlling_agencyBELLOWS ASSEMBLY
NSN4820-01-560-9399
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 50M-203-50S · 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
•
MATERIAL: NICKEL ALLOY AND COPPER ALLOY
•
TYPE/MODEL DESIGNATION: MODEL 203
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESASSEMBLY INCLUDES REFRIGERENT CONNECTION 36 INCH LONG CAPILLARY TUBE WITH 1/4-INCH SAE FLANGE NUT CONNECTION; TEMPERATURE RANGE 90-140 DEG F, SET TEMP 120 DEG; APPLICATION: SALT WATER COOLING/11KW HYDRAULIC POWER UNIT IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBELLOWS ASSEMBLY
END ITEM IDENTIFICATION4820-01-561-1771 REGULATING VALVE; NEW CONSTRUCTION LCS1
MATERIALNICKEL ALLOY AND COPPER ALLOY
TYPE/MODEL DESIGNATIONMODEL 203
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

No substitute or cross-reference records for this part.

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 50M-203-50S?
50M-203-50S is a BELLOWS ASSEMBLY,VALVE,THERMOSTA.
What is the NSN for 50M-203-50S?
50M-203-50S is cataloged in the U.S. Government catalog under NSN 4820-01-560-9399. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.