3″-125LB Cast Iron Metal Seated Rising Stem Gate Valve

Valve Type Rising Stem Gate Valve (OS&Y – Outside Screw and Yoke)
Nominal Size 3 inches (3″) / DN80
Pressure Class 125 LB (Class 125)
End Connection Flanged Ends
Flange Standard ASME B16.1 (Class 125 Cast Iron Flange – Raised Face / Flat Face)
Face-to-Face Dimension ASME B16.10 / MSS SP-70
Test Standard API 598 / MSS SP-70

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설명

TECHNICAL DATASHEET

3″ 125LB GATE VALVE (OS&Y)
1. General Specifications

Item	사양
밸브 유형	Rising Stem Gate Valve (OS&Y – Outside Screw and Yoke)
공칭 크기	3 inches (3″) / DN80
Pressure Class	125 LB (Class 125)
End Connection	Flanged Ends
Flange Standard	ASME B16.1 (Class 125 Cast Iron Flange – Raised Face / Flat Face)
Face-to-Face Dimension	ASME B16.10 / MSS SP-70
Test Standard	API 598 / MSS SP-70

Design Parameters

Item	Unit/Standard	매개변수
Design Pressure	psi	200 psi (Saturated Steam) / 175 psi (Non-Shock WOG) *
Service Media	–	Water, Oil, Gas (WOG) or Steam (depending on conditions)
Operating Temp.	°C / °F	-29°C to 220°C (-20°F to 430°F) **
작업	–	Handwheel (Manual)

** Pressure rating per MSS SP-70 / ASME B16.1 for Class 125.*
*** Temperature range depends on trim materials (Seat/Seal).*

Material of Construction (M.O.C.)

Part Name	Material Required	Standard / Grade (Ref.)
1. Body	DI (Ductile Iron)	ASTM A536 (60-40-18) or ASTM A395
2. Bonnet	연성 주철	ASTM A536
3. Wedge (Gate)	DI (Ductile Iron)	ASTM A536 (Fully Guided)
4. Seat Ring (Seat Face)	Bronze (Integral or Ring)	ASTM B62 (C83600) or ASTM B61
5. Stem	Stainless Steel	ASTM A276 Type 410 / 304 / 316
6. Stem Nut	Bronze / Aluminum Bronze	High-strength wear-resistant alloy
7. Packing	Flexible Graphite / PTFE	–
8. Gasket	Compressed Non-Asbestos / Graphite	–
9. Bolts/Nuts	Carbon / Alloy Steel	ASTM A193 B7 / A194 2H
10. Handwheel	Cast Iron / Ductile Iron	–

Main Dimensions (Reference)

Note: Dimensions are for reference only. Final dimensions to be verified per manufacturer’s drawing. (Unit: mm / inch)

설명	Dimension	비고
Face-to-Face (L)	203 mm (8.0″)	Per ASME B16.10 / MSS SP-70
Flange Diameter (D)	191 mm (7.5″)	ASME B16.1 Class 125
Bolt Circle Diam. (C)	152.4 mm (6.0″)	ASME B16.1 Class 125
Bolt Holes (n-ød)	4-19 mm (4-0.75″)	Standard 4 holes
Flange Thickness (T)	23.9 mm (0.94″)	ASME B16.1 Class 125
Handwheel Diameter (W)	Approx. 250 mm (10″)	Varies by manufacturer
Top-to-Open Height (H)	Approx. 450 mm (17.7″)	From stem top to handwheel (Ref.)

Inspection & Testing (Per API 598 / MSS SP-70)

Test Description	Medium	Pressure (psi)	기준
Shell (Hydrostatic)	Water	300	API 598
Seat (High Pressure)	Water / Air	220	API 598
Backseat Test	Water / Air	As required	API 598
Low Pressure Pneumatic	Air	60 – 80	Optional / If required

Options & Notes

Stem Upgrade: 304/316 Stainless Steel, Monel.
Seat Replacement: Renewable Bronze Seat Rings (optional).
작업: Gear Operator (for higher torque applications).
코팅: Epoxy Coated (Internal & External) per AWWA C550 (e.g., RAL 5005 Blue).
Flange Face: Confirm if Flat Face (FF) is required for mating with cast iron flanges (recommended) or Raised Face (RF).

Remarks:

압력 등급: This datasheet is based on Class 125 rating per MSS SP-70 and ASME B16.1 standards. Working pressure is typically 200 psi for saturated steam 그리고 175 psi for cold water/oil/gas (non-shock) .
Wedge Material: The wedge is specified as 연성 주철 with Bronze seating surfaces (integral or welded).
Flange Standard: Flanges are designed per ASME B16.1 Class 125, which is the correct standard for cast iron and ductile iron flanges in this pressure class

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