1/2″-800LB Close Die Forged Lift Check Valve

Valve Type Lift Check Valve
Design Standard API 602 / ASME B16.34 / BS 5352
Nominal Size 1/2 inch (DN15)
Pressure Class Class 800 LB (PN130)
Structure Type Lift Type, Bolted Bonnet
Connection Type NPT Threaded (ASME B1.20.1) or Socket Weld (ASME B16.11)
Installation Horizontal Piping
Body Material ASTM A105N (Forged Carbon Steel)

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API 602 Forged Steel Lift Check Valve Technical Data Sheet

A105N Material 1/2″ 800LB NPT/Welded Ends

General Information

Item	Spesifikasi
Jenis Katup	Lift Check Valve
Design Standard	API 602 / ASME B16.34 / BS 5352
Ukuran Nominal	1/2 inch (DN15)
Pressure Class	Class 800 LB (PN130)
Structure Type	Lift Type, Bolted Bonnet
Connection Type	NPT Threaded (ASME B1.20.1) or Socket Weld (ASME B16.11)
Installation	Horizontal Piping
Bahan Tubuh	ASTM A105N (Forged Carbon Steel)

Applicable Standards

Item	Standard Code
Design & Manufacturing	API 602, ASME B16.34, BS 5352
Face-to-Face / End-to-End	Manufacturer Standard / ASME B16.10
Socket Weld Ends	ASME B16.11
Threaded Ends	ASME B1.20.1 (NPT)
Test & Inspection	API 598
Pressure-Temperature Rating	ASME B16.34
Valve Marking	MSS SP-25

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
Konstruksi Bodi: 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)

Item	Part Name	Bahan	Standard/Remark
1	Tubuh	ASTM A105N	Forged Carbon Steel, suitable for NACE MR0175
2	Bonnet	ASTM A105N	Forged Carbon Steel
3	Cakram	ASTM A276 410 / A105N+STL	13Cr Stainless Steel or Hardfaced
4	Kursi	Integral / STL Hardfaced	Machined directly on body or hardfaced
5	Gasket	304 + Flexible Graphite	Spiral Wound
6	Stud Bolt	ASTM A193 Gr.B7	Alloy Steel
7	Hex Nut	ASTM A194 Gr.2H	Heavy Hex Nut

Technical Parameters & Dimensions

5.1 Pressure-Temperature Ratings

Item	Parameter
Nominal Pressure	Class 800 LB (PN130)
Shell Test Pressure	207 bar (3000 PSI)
Seat Test Pressure	152 bar (2200 PSI)
Low-Pressure Pneumatic Test	5 – 7 bar (Air)
Kisaran Suhu	-29°C ~ 425°C
Applicable Media	Water, steam, oil, etc.

5.2 Dimensions (1/2″ Class 800)

Dimension	Value	Remark
End-to-End Length (L)	73 mm	Socket Weld/Threaded ends, per Sant Valves data
Height (H)	Approx. 53 mm	Reference value
Socket Weld Bore (A)	10 mm	Min. socket weld depth
Socket Weld Dia (B)	21.8 – 22.2 mm	Socket weld bore range
Threaded End	1/2″ NPT	Per ASME B1.20.1
Weight	Approx. 1.0 kg	Reference value, may vary by manufacturer

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)

Test Item	Test Pressure	Medium	Acceptance Criteria
Shell Test	207 bar (Hydrostatic)	Water	No visible leakage
High-Pressure Seat Test	152 bar (Hydrostatic)	Water	No visible leakage
Low-Pressure Seat Test	5 – 7 bar (Air)	Air	No bubbles leakage
Test Duration	Per API 598	—	Hold time conforms to standard

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

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