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Technical Data Sheet
20138H51SS ✓ 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 VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL SEAT, valve_size: 0.500 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: ANGLE FLANGED ENDS, nominal_thickness: 0.500 INCHES ALL ENDS IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-063-3819, 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
20138H51SS
NSN: 4820-01-063-3819
FSC: 4820
CAGE: 15187 — EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DIV NAVY PRODUCT TEAM (USA)
SPECIFICATIONS
materialSTEEL SEAT
valve_size0.500 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorANGLE FLANGED ENDS
nominal_thickness0.500 INCHES ALL ENDS IN
bolt_hole_quantity4 ALL ENDS
flange_face_designRAISED STRAIGHT ALL ENDS
flow_control_deviceDISK
maximum_operating_temp397.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_methodAUTOMATIC
end_item_identificationSHIP, OHIO CLASS SSN(TRIDENT)
NSN4820-01-063-3819
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 20138H51SS · 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 DOCUMENT AND CLASSIFICATION: ASTM A276,TYPE 304 ASSN STD SINGLE MATERIAL RESPONSE SEAT
FIRST CONNECTION FACE TO CENTERLINE DISTANCE: 3.160 INCHES IN
CONNECTION TYPE: FLANGE ALL ENDS
NOMINAL THICKNESS: 0.500 INCHES ALL ENDS IN
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
VALVE SIZE: 0.500 INCHES IN
NOMINAL OUTSIDE DIAMETER: 3.500 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A276,TYPE 304 ASSN STD SINGLE MATERIAL RESPONSE SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A216,GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE BODY
FIRST CONNECTION FACE TO CENTERLINE DISTANCE3.160 INCHES IN
CONNECTION TYPEFLANGE ALL ENDS
NOMINAL THICKNESS0.500 INCHES ALL ENDS IN
FLANGE SHAPEROUND WITH HOLES ALL ENDS
VALVE SIZE0.500 INCHES IN
NOMINAL OUTSIDE DIAMETER3.500 INCHES ALL ENDS IN
BOLT CIRCLE NOMINAL DIAMETER2.435 INCHES ALL ENDS IN
MEDIA FOR WHICH DESIGNEDSTEAM SINGLE RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
16047Interchangeable
interchangeable cross-reference
interchangeable
ZHVY0083Interchangeable
interchangeable cross-reference
interchangeable
22070Interchangeable
interchangeable cross-reference
interchangeable
121485Interchangeable
interchangeable cross-reference
interchangeable
801024PCHInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20138H51SS?
20138H51SS is a VALVE,SAFETY RELIEF.
What parts can replace 20138H51SS?
There are 5 known substitutes for 20138H51SS: 16047, ZHVY0083, 22070 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20138H51SS?
20138H51SS is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-063-3819. This indicates validated use in U.S. government and defense supply chains.
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