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

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

Description

TECHNICAL DATASHEET

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

Item

仕様

バルブタイプ

Rising Stem Gate Valve (OS&Y – Outside Screw and Yoke)

公称サイズ

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

  1. Design Parameters

Item

Unit/Standard

パラメータ

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) **

手術

Handwheel (Manual)

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

  1. 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

ダクタイル鋳鉄

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

  1. Main Dimensions (Reference)

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

Description

Dimension

Remarks

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.)

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

Test Description

Medium

Pressure (psi)

標準

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

  1. Options & Notes
  • Stem Upgrade: 304/316 Stainless Steel, Monel.
  • Seat Replacement: Renewable Bronze Seat Rings (optional).
  • 手術: Gear Operator (for higher torque applications).
  • コーティング: 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:

  1. 圧力定格: 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 そして 175 psi for cold water/oil/gas (non-shock) .
  2. Wedge Material: The wedge is specified as ダクタイル鋳鉄 with Bronze seating surfaces (integral or welded).
  3. 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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