Products
Bolted Bonnet Swing Check Valve
Specifications:
Pressure: PN1.6~PN42.0 (Class 150~2500)
Size: DN15~1000 (NPS1/2~NPS40)
Applicable temperature: -29~600℃
Applicable medium: water, oil, steam, etc.
Structure: bolted bonnet, swing type
Standards:
Design: GB/T 12236、API 6D、BS1868
Face to face dimension: GB/T 12221、API 6D、ASME B16.10
Flanged end: GB/T 9113、JB/T 79、ASME B16.5
Test and inspection: GB/T 13927、JB/T 9092、API 598、API 6D、BS 6755
Materials:
Body: WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M
Seat: A105、F11、F22、F5、F9、F304、F316、F321、F304L、F316L
Disc: WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M
Gasket: WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M
Bonnet: WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M
Features:
Check valves are used in pipes under pressure between PN1.6~PN16.0MPa (Class 150~2500Lb), working temperatures -29~600℃. They are used in industries include oil, chemistry, pharmaceutical, fertilizer, and power gene-ration prevent the backward flux of the medium.
The main structure features include:
The products feature a reasonable structure, reliable seal, good performance and nice modeling.
Either soft or hard seal can be selected for the product upon different working conditions. The sealing face is built up with Co-based carbide alloy, leaving a better wearability, corrosion and scrap resistance and a longer duration.
Small opening pressure, the disc can be opened fully with a very small pressure differential.
Inside-set hinge pin structure reduces leakage and reliable use.
PN≥16.0MPa (Class 1500), the middle cavity uses a seal-tightening sealing structure to have the sealing performance reinforced along with the pressure rise so as to ensure the sealing performance.
Different parts materials and different sizes for flange, butt-welding are available for sensible combination according to different working facts and customers’ requirements.
