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Products: gate valve, stop valve, ball valve, check valve, plug valve, hard seal butterfly valve,

special valve for high temperature and high pressure power station.

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Lift type check valve

GZP Swing check valves are manufactured to the latest edition of API 600/ASME B 16.34 and tested to API 598.
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Product description

Introduction video of Swing Check Valve :  

GZP Swing check valves are manufactured to the latest edition of API 600/ASME B 16.34 and tested to API 598.All valves from GZP VALVE are strictly 100%tested before shipment to guarantee zero leakage.

Swing check valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction and prevent the flow in the opposite direction. They are widely applied in petroleum, chemical, food, medicine, textile, power, marine, metallurgy, energy systems, etc

The disc of swing check valves is round-shaped; it makes rotary movements along the shaft's central line acted by the fluid pressure,the fluid flows from the inlet side to the outlet side. When the inlet pressure is lower than the outlet pressure, its disc can close automatically due to factors like fluid pressure difference and deadweight to prevent the fluid from flowing back;  

The main construction features of GZP Swing check valve are following:
1.Built-in trim structure design
GZP check valve adopts a built-in structure. The valve disc and hinge arm are both inside its inner chamber, thus having no impact on its flow and reducing its leakage points;
2.Integral forged or rolled body seat or seat welded and overlaid in kinds of material
Welded overlay are strictly according to approved WPS procedures. After welding and all required heat treating, the seat ring faces are machined, thoroughly cleaned and inspected before leaving for assembly.
3.The large size is provided with a lifting ring for lifting, thus easier for installation; Swing check valves can be installed in either horizontal or vertical direction.

 

Technical Data

Design Standard

API6D, BS1868, DIN3356,EN10739

Body Material

Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel.etc.

NACE MR-01-75/NACE MR-01-03 Special Requirements

Pressures range

ANSI 150 ~ANSI 2500 ,PN10~PN420

Size range

DN50(2") ~DN1200 (48")

Face to Face

ANSI B16.10,EN 558,DIN3202

Flanged RF, FF, RTJ Ends

ASME B16.5 ≤ DN600 (24") ASME B16.47 A ≥ DN650 (26")

BS 4504,DIN 2543-2545,EN1092

Butt-Weld BW Ends

ASME B16.25 ,DIN 3239,BS 2080, EN 12627

Temperature range

-29°~ 425°C

Design Feature

Construction

Lift type, Swing type,Wafer type,Pressure seal bonnet,Bolted Bonnet

Disc Type

Dual plate, single plate, plug type

Seat Sealing

Integral body seat ,seat welded and overlaid

Fire Safe Design

API 607,BS 6755

Inspection & Test

Visual Inspection

MSS SP-55

Material Inspection

PMI Test----Chemical Analysis

HB Test---Hardness Test

UT---Ultrasonic Test

RT---RadiographicTest

MT---Magnetic Test

NDT Test Non-destructive

Dimention inspcetion

According to drawings

Valve Inspection and Test

API 598,DIN 3230,EN 12266,BS 5146

 

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keyword:gate valve, globe valve, ball valve, check valve, plug valve, hard seal butterfly valve

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