Gold top valve located in Oubei Town, Wenzhou, China,where can make all kinds of precision balls,including top entry,metal seat and V type balls.On this base,our products range of floating,trunnion,Gate globe check valve ,butterfly valve ,etc.Surely we can design them by customer's special requirements.
|Place of Origin:||中国|
|Brand Name:||GOLD TOP|
|Minimum Order Quantity:||1|
|Packaging Details:||wooden box|
|Structural Length:||ASME B16.10||Connecting End:||RTJ ASME B16.5|
|Test Standard:||API 598、ISO 5208||Pressure:||900LB|
|TYPE:||PRESSURE SEALING BONNET|
lift check valve,
high pressure check valve
API 6D BS1868 SWING CHECK VALVE with counterweight WC6 BODY 900LB TRIM SS304+FULL STL
o avoid slam is essential that the counterweight closes the valve before a flow reversal occurs. That Slam is what causes the “Water Hammer” in piping systems.
The cushion cylinder cannot retard the valve closure and will minimize the slamming tendency when the valve closes too quickly due to its own counterweight.
The counterweight requires an opening force that diminishes as the valve opens and produces the maximum closing force at the seated position where it is most needed. The pressure drop is therefore minimized.
This type of Swing Check valve is designed to produce full pipeline flow area at only 25 to 30 degrees opening. In response to a high demand the disc continues to lift up to a maximum of 60 degrees while other types of swing check valves as the Slantered type cannot absorb this high demand conditions.
ProControl has created the HDD hydraulic damper series bearing in mind the users interests and engineering requirements in order to reduce surge pressure hammer blow, resulting from rapid valve closure typical of non-return valves.
The working principle consists in the dissipation in oil of the energy generated by the valve disc during its closing / opening movement.
SWING CHECK VALVES
In swing check valves, the disc swings on a hinge onto the seat to block reverse flow, or off the seat to allow forward flow.
The seat opening cross-section is perpendicular to the centerline between the two ports.
Forged of cast carbon, alloy and stainless steel, bolted joint between cap and body, renewable or welded seats.
PRESSURE SEAL BONNET
Swing check valves are available assembled with bolted bonnet or with pressure seal bonnet, that allows high pressure service. The main feature about the pressure seal bonnet is that the body-bonnet joints seals improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.
Internal pressure forces the bonnet upwards against the gasket, creating forces in the contact areas between the gasket and the bonnet. As pressure increases, leaks probability decreases, because of the tightening of the contact surface between the gasket and the body. The area where the body is in contact with the joint is covered by stainless steel, improving surface’s quality and avoiding corrosion issues.
Contact Person: sales