Popis
British Standard Forged Steel Gate Valve Technical Data Sheet (BS Series)
A105N Material DN50 PN16 Welded Flange
- General Information
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Item
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Specifikace
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Typ ventilu
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Forged Steel Gate Valve
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Design Standard
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BS 5352 / API 602 / ASME B16.34
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Jmenovitá velikost
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DN50 (2 inch)
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Pressure Class
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PN16 (Equivalent to Class 150 LB)
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Structure Type
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OS&Y (Outside Screw and Yoke), Bolted Bonnet
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Connection Type
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Welded Flange
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Operace
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Handwheel
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Materiál těla
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ASTM A105N (Forged Carbon Steel, suitable for NACE MR0175)
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- Applicable Standards
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Item
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Standard Code
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Design & Manufacturing
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BS 5352, API 602, ASME B16.34
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Face-to-Face / End-to-End
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BS EN 558-1 (Series 1) / Manufacturer Standard
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Flanged Connections
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ASME B16.5 (Class 150)
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Test & Inspection
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API 598
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Pressure-Temperature Rating
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ASME B16.34
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Valve Marking
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MSS SP-25
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- Main Design Features
- Konstrukce karoserie: One-piece die forged body, dense structure, high strength, eliminates casting defects
- Bonnet Connection: Bolted bonnet design with 304/Flexible Graphite spiral wound gasket sealing
- Wedge Design: Solid wedge, fully guided design, minimizes wear, reliable sealing
- Stem Design: Backseat feature allows packing replacement under pressure when valve is fully open
- Seating Surface: Seat rings hardfaced with Stellite for durability
- Packing: Flexible graphite packing, low emission design
- Seat Rings: Renewable seat rings, made from hardened stainless steel
- Main Component Materials (A105N Material)
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Item
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Part Name
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Materiál
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Standard/Remark
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1
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Tělo
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ASTM A105N
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Forged Carbon Steel, Normalized
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|
2
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Bonnet
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ASTM A105N
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Forged Carbon Steel
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3
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Wedge
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ASTM A276 410 / A105N+STL
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13Cr Stainless Steel or Hardfaced
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4
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Seat Ring
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ASTM A276 410 / STL Hardfaced
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Hardened Stainless Steel, Renewable
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5
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Zastavit
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ASTM A182 F6a (13Cr)
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Stainless Steel
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|
6
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Gasket
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304 + Flexible Graphite
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Spiral Wound
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7
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Packing
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Flexible Graphite
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Low emission design
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8
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Gland Bushing
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ASTM A276 410
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Stainless Steel
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9
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Gland Flange
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ASTM A105
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Carbon Steel
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10
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Bonnet Bolt
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ASTM A193 Gr.B7
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Alloy Steel
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11
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Bonnet Nut
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ASTM A194 Gr.2H
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Heavy Hex Nut
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12
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Handwheel
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ASTM A197
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Malleable Cast Iron
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- Technical Parameters & Dimensions
5.1 Pressure-Temperature Ratings
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Item
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Parametr
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Nominal Pressure
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PN16 (1.6 MPa)
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Shell Test Pressure
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2.4 MPa (Hydrostatic) [API 598]
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High-Pressure Seat Test Pressure
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1.76 MPa (Hydrostatic) [API 598]
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Low-Pressure Pneumatic Test Pressure
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0.5 – 0.7 MPa (Air) [API 598]
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Teplotní rozsah
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-29°C ~ 425°C
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Applicable Media
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Water, steam, oil, etc.
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5.2 Dimensions (DN50 PN16 Welded Flange)
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Dimension
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Value
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Remark
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End-to-End Length (L)
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178 mm
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For PN16/Class 150, per BS EN 558-1 Series 1
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Height (H-OPEN)
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Approx. 284 mm
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Fully open position
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Handwheel Diameter (W)
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180 mm
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Flange Diameter (D)
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152.4 mm
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ASME B16.5 Class 150 2″ RF
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Flange Thickness (T)
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19.1 mm
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ASME B16.5 Class 150 2″ RF
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Bolt Circle Diameter
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120.7 mm
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ASME B16.5 Class 150 2″ RF
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Number of Bolt Holes/Size
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8 / 19 mm
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ASME B16.5 Class 150 2″ RF
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Flange Sealing Face
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Raised Face
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ASME B16.5
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Bore Diameter (d1)
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33 mm
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Reduced bore, typical API 602 design
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Weight
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Approx. 14-18 kg
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Reference value, may vary by manufacturer
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5.3 End Connection Details
- Welded Flange: Flange dimensions per ASME B16.5 Class 150, Raised Face sealing, flange to be welded to pipe
- Flange Type: Integral forged flange or welded flange
- Test & Inspection (API 598)
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Test Item
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Test Pressure
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Medium
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Acceptance Criteria
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Shell Test
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2.4 MPa
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Water
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No visible leakage
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High-Pressure Seat Test
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1.76 MPa
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Water
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No visible leakage
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Low-Pressure Seat Test
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0.5 – 0.7 MPa
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Air
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No bubbles leakage
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Test Duration
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Per API 598
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—
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Hold time conforms to standard
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- Marking & Supply
- Valve Marking: Per MSS SP-25, nameplate to include nominal size, pressure class, material, heat number, design standard, etc.
- Flow Direction: Gate valve has no flow direction restriction
- Cleaning & Protection: Valves internally and externally cleaned, flange faces covered with protectors and coated with rust preventive
- Documentation: Material certificates, pressure test reports, declaration of conformity provided with shipment
ZÁRUKA:
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