Description
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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Specification
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Valve Type
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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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Nominal Size
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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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Operation
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Handwheel
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Body Material
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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
- Body Construction: 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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Material
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Standard/Remark
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1
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Body
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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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Stem
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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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Parameter
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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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Temperature Range
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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
GUATANTEE:
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.
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