Wenzhou Goldtop Valve Co.LTD
Wenzhou Goldtop Valve Co.LTD

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.

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SS304 Counter Weight Check Valve TRIM API 6D BS 1868 WC6 BODY 900 LB Pressure

SS304 Counter Weight Check Valve TRIM API 6D BS 1868 WC6 BODY 900 LB Pressure

  • SS304 Counter Weight Check Valve TRIM API 6D BS 1868 WC6 BODY 900 LB Pressure
  • SS304 Counter Weight Check Valve TRIM API 6D BS 1868 WC6 BODY 900 LB Pressure
SS304 Counter Weight Check Valve TRIM API 6D BS 1868 WC6 BODY 900 LB Pressure
Product Details:
Place of Origin: 中国
Brand Name: GOLD TOP
Certification: API6D
Model Number: H41H
Payment & Shipping Terms:
Minimum Order Quantity: 1
Packaging Details: wooden box
Supply Ability: 100+pcs+15days
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Detailed Product Description
Material: WCC Design Standard: BS1868
Structural Length: ASME B16.10 Connecting End: RTJ ASME B16.5
Test Standard: API 598、ISO 5208 Pressure: 900LB
High Light:

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.



  • Sizes: from DN100 to DN1200
  • Rating PN10 / PN16
  • Body GJS – 500 – 7
  • Disc GJS – 500 – 7
  • Body Seat:
    • Stainless Steel A304
    • Or Rubber
  • Shaft Stainless Steel A304



  • Cushion & Counterweight
  • Power Assisted Closing
  • Lever & Weight
  • The swing check valve functions by allowing flow forces to move the disc from the closed position to the fully open position in a sweeping arc motion against the hinge stop inside of the valve body.
  • Due to the weight and center of gravity location of the disc and swing arm assembly, the valve will return to the closed position when the flow become interrupted or reversed.
  • External counterweights mounted on the hinge pin are sometimes used to increase or decrease the reaction time and speed of the disc returning to the closed position.
  • Swing check valves have no requirement for operators, and so the valve is operated automatically by flow reversal.
  • The flow direction of the fluid is indicated by the arrow on the swing check valve body.


  • A swing check valve is recommended for use in systems consisting of gate valves because of the low pressure drop across the valve.
  • Swing check valve also recommended for systems having low velocity flow and should not be used on systems with pulsating flow when the continuous flapping or pounding would damage the seat.


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.



  • Special design of the hydraulic chamber cavities allowing easy and efficient drainage of hydraulic fluid from one chamber to the other through an interconnecting manifold which has an incorporated flow regulator allowing for fine throttling and different speed settings across the valves stroke.
  • Several models available to cover all swing check valves and eccentric butterfly valves without dimensions or torques limitations.

Following available options:

  • Speed control device which allow the adjustment of the operating time in two sequential steps, faster for the first part of the stroke and slower for the last segment.
  • For butterfly valves it is possible to fit the damper with an eccentric counterweight allowing to reach the complete closure of the terminal part.
  • Compact solution consisting of a fully enclosed cylindrical rotational device, consequently ideally suited for heavy duty operation which allows our clients long maintenance free periods due to non-exposed rotating components.


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.


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.


SS304 Counter Weight Check Valve TRIM API 6D BS 1868 WC6 BODY 900 LB Pressure 0


Contact Details
Wenzhou Goldtop Valve Co.LTD

Contact Person: sales

Tel: +8613758447235

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