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Technical Data Sheet

1787 SZ 4 IN — Technical Data Sheet

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— · 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

RESISTOR NETWORK,FIXED,WIRE WOUN. Key specifications include material: COPPER ALLOY 836 DISK, stem_type: NONRISING, valve_size: 4.000 INCHES IN, bonnet_type: INSIDE SCREW, pressure_class: ERR-060, connection_type: FLANGE, ROUND W/HOLES. This part is cataloged in the Federal Logistics Information System under NSN 4820-00-268-8773, 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
1787 SZ 4 IN
NSN: 4820-00-268-8773
FSC: 4820
CAGE: 48422 — WILLIAM POWELL COMPANY, THE DBA POWELL VALVE DIV THE STARFLO CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY 836 DISK
stem_typeNONRISING
valve_size4.000 INCHES IN
bonnet_typeINSIDE SCREW
pressure_classERR-060
connection_typeFLANGE, ROUND W/HOLES
flange_diameter9.000 INCHES IN
features_providedBONNET PACKING
bolt_hole_quantity8
flange_face_designPLAIN
face_to_face_distance9.000 INCHES IN
valve_operation_methodMANUAL
NSN4820-00-268-8773
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1787 SZ 4 IN · 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
•
BONNET TYPE: INSIDE SCREW
•
INLET RELATIONSHIP WITH OUTLET: IDENTICAL
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 450.0 FAHRENHEIT STEAM AND 450.0 FAHRENHEIT WATER-OIL-GAS DEGF
•
MATERIAL: IRON CAST UNS F12102 BODY
•
PRESSURE CLASS: ERR-060
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A126 CLASS B ASSN STD SINGLE MATERIAL RESPONSE BODY
•
FLANGE FACE DESIGN: PLAIN
•
FACE TO FACE DISTANCE: 9.000 INCHES IN
TECHNICAL CHARACTERISTICS
BONNET TYPEINSIDE SCREW
INLET RELATIONSHIP WITH OUTLETIDENTICAL
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED450.0 FAHRENHEIT STEAM AND 450.0 FAHRENHEIT WATER-OIL-GAS DEGF
MATERIALIRON CAST UNS F12102 BODY
PRESSURE CLASSERR-060
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A126 CLASS B ASSN STD SINGLE MATERIAL RESPONSE BODY
FLANGE FACE DESIGNPLAIN
FACE TO FACE DISTANCE9.000 INCHES IN
OPERATING PRESSURE AND TYPE125.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
STEM TYPENONRISING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
B18-2-2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1-4-28InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MSS SP-70InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
0611FLG3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
WWV58InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
DWG5120-00-144-2089InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1787 SZ 4 IN?
1787 SZ 4 IN is a RESISTOR NETWORK,FIXED,WIRE WOUN.
What parts can replace 1787 SZ 4 IN?
There are 30 known substitutes for 1787 SZ 4 IN: B18-2-2, 1-4-28, MSS SP-70 and 27 more. Substitute compatibility should be verified for your specific system.
Is 1787 SZ 4 IN still available?
1787 SZ 4 IN is currently cancelled.
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