Beschreibung
TECHNICAL DATASHEET
3″ 125LB GATE VALVE (OS&Y)
1. General Specifications
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Item
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Spezifikation
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Ventiltyp
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Rising Stem Gate Valve (OS&Y – Outside Screw and Yoke)
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Nenngröße
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3 inches (3″) / DN80
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Pressure Class
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125 LB (Class 125)
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End Connection
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Flanged Ends
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Flange Standard
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ASME B16.1 (Class 125 Cast Iron Flange – Raised Face / Flat Face)
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Face-to-Face Dimension
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ASME B16.10 / MSS SP-70
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Test Standard
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API 598 / MSS SP-70
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- Design Parameters
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Item
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Unit/Standard
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Parameter
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Design Pressure
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psi
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200 psi (Saturated Steam) / 175 psi (Non-Shock WOG) *
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Service Media
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–
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Water, Oil, Gas (WOG) or Steam (depending on conditions)
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Operating Temp.
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°C / °F
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-29°C to 220°C (-20°F to 430°F) **
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Betrieb
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–
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Handwheel (Manual)
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** 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.)
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Part Name
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Material Required
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Standard / Grade (Ref.)
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1. Body
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DI (Ductile Iron)
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ASTM A536 (60-40-18) or ASTM A395
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2. Bonnet
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Sphäroguss
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ASTM A536
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3. Wedge (Gate)
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DI (Ductile Iron)
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ASTM A536 (Fully Guided)
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4. Seat Ring (Seat Face)
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Bronze (Integral or Ring)
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ASTM B62 (C83600) or ASTM B61
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5. Stem
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Stainless Steel
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ASTM A276 Type 410 / 304 / 316
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6. Stem Nut
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Bronze / Aluminum Bronze
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High-strength wear-resistant alloy
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7. Packing
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Flexible Graphite / PTFE
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–
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8. Gasket
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Compressed Non-Asbestos / Graphite
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–
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9. Bolts/Nuts
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Carbon / Alloy Steel
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ASTM A193 B7 / A194 2H
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10. Handwheel
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Cast Iron / Ductile Iron
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–
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- Main Dimensions (Reference)
Note: Dimensions are for reference only. Final dimensions to be verified per manufacturer’s drawing. (Unit: mm / inch)
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Beschreibung
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Dimension
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Bemerkungen
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Face-to-Face (L)
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203 mm (8.0″)
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Per ASME B16.10 / MSS SP-70
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Flange Diameter (D)
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191 mm (7.5″)
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ASME B16.1 Class 125
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Bolt Circle Diam. (C)
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152.4 mm (6.0″)
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ASME B16.1 Class 125
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Bolt Holes (n-ød)
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4-19 mm (4-0.75″)
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Standard 4 holes
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Flange Thickness (T)
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23.9 mm (0.94″)
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ASME B16.1 Class 125
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Handwheel Diameter (W)
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Approx. 250 mm (10″)
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Varies by manufacturer
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Top-to-Open Height (H)
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Approx. 450 mm (17.7″)
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From stem top to handwheel (Ref.)
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- Inspection & Testing (Per API 598 / MSS SP-70)
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Test Description
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Medium
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Pressure (psi)
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Standard
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Shell (Hydrostatic)
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Water
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300
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API 598
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Seat (High Pressure)
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Water / Air
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220
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API 598
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Backseat Test
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Water / Air
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As required
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API 598
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Low Pressure Pneumatic
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Air
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60 – 80
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Optional / If required
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- Options & Notes
- Stem Upgrade: 304/316 Stainless Steel, Monel.
- Seat Replacement: Renewable Bronze Seat Rings (optional).
- Betrieb: Gear Operator (for higher torque applications).
- Beschichtung: 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:
- Druckbewertung: 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 and 175 psi for cold water/oil/gas (non-shock) .
- Wedge Material: The wedge is specified as Sphäroguss 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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