Description
API 602 Forged Steel Lift Check Valve Technical Data Sheet
A105N Material 1/2″ 800LB NPT/Welded Ends
- General Information
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Item
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Specification
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Valve Type
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Lift Check Valve
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Design Standard
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API 602 / ASME B16.34 / BS 5352
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Nominal Size
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1/2 inch (DN15)
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Pressure Class
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Class 800 LB (PN130)
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Structure Type
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Lift Type, Bolted Bonnet
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Connection Type
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NPT Threaded (ASME B1.20.1) or Socket Weld (ASME B16.11)
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Installation
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Horizontal Piping
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Body Material
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ASTM A105N (Forged Carbon Steel)
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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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API 602, ASME B16.34, BS 5352
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Face-to-Face / End-to-End
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Manufacturer Standard / ASME B16.10
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Socket Weld Ends
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ASME B16.11
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Threaded Ends
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ASME B1.20.1 (NPT)
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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
- Operating Principle: Automatically opens and closes the disc by medium flow. When medium flows in the specified direction, disc opens under medium pressure. When backflow occurs, disc closes against seat to prevent reverse flow
- Disc Structure: Disc moves vertically along the body centerline, reliable operation, suitable for small bore applications
- Body Construction: One-piece die forged body, dense structure, high strength, no casting defects
- Bonnet Connection: Bolted bonnet design with stainless steel/flexible graphite spiral wound gasket sealing
- Sealing Surface: Hardfaced with alloy steel or carbide, reasonable material pairing, long service life
- Installation Requirement: Suitable for horizontal pipelines only, disc closes by gravity
- 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, suitable for NACE MR0175
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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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Disc
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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
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Integral / STL Hardfaced
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Machined directly on body or hardfaced
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5
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Gasket
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304 + Flexible Graphite
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Spiral Wound
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6
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Stud Bolt
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ASTM A193 Gr.B7
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Alloy Steel
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7
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Hex Nut
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ASTM A194 Gr.2H
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Heavy Hex Nut
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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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Class 800 LB (PN130)
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Shell Test Pressure
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207 bar (3000 PSI)
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Seat Test Pressure
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152 bar (2200 PSI)
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Low-Pressure Pneumatic Test
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5 – 7 bar (Air)
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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 (1/2″ Class 800)
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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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73 mm
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Socket Weld/Threaded ends, per Sant Valves data
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Height (H)
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Approx. 53 mm
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Reference value
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Socket Weld Bore (A)
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10 mm
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Min. socket weld depth
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Socket Weld Dia (B)
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21.8 – 22.2 mm
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Socket weld bore range
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Threaded End
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1/2″ NPT
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Per ASME B1.20.1
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Weight
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Approx. 1.0 kg
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Reference value, may vary by manufacturer
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5.3 End Connection Details
- NPT Threaded Ends: Per ASME B1.20.1, 1/2 inch American Standard Taper Pipe Thread
- Socket Weld Ends (SW): Per ASME B16.11, bore diameter and depth conforming to standard
- Flow Direction: Clear flow direction arrow marking on body
- 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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207 bar (Hydrostatic)
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Water
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No visible leakage
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High-Pressure Seat Test
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152 bar (Hydrostatic)
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Water
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No visible leakage
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Low-Pressure Seat Test
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5 – 7 bar (Air)
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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: Clear flow direction arrow marking on body
- Cleaning & Protection: Valves internally and externally cleaned, ends covered with protectors, threaded or weld ends 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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