The disc check valve is a new type of check valve developed by combining many years of valve production technology with foreign advanced product design. Its main advantage is to overcome the impact of swing check valves and lift-type upper return valves under working conditions. , water hammer phenomenon, achieving impact-free operation.
Design & Manufactured to API 6D, ASME B16.34 or Equivalent.◆ P.T Ratings to ASME B16.34
» Face to Face Dimensions to API 6D or ASME B16.34 ◆ Flanged Ends to ASME B16.5
» Butt-weld Ends to ASME B16.25 ◆ Valves Marking to MSS SP-25
» Inspect & Tested to API 598 or API 6D
» Sizes Ranges from 2" thru 30"
» Pressure Ratings from Class 150 to Class 600, PN16 to PN100
» Ends Connections in Flanged R.F or RTJ, Butt-weld or Hub Ends
» Structured in Two Piece Bolted Body, One Piece Union Pressure Sealed Body
» A variety of body and trim material is offered, including carbon steel ASTM A216 WCB, WCC, Low Carbon Steel LCB, LCC, Alloy Steel WC6, WC9, C5, Stainless Steel CF8, CF8M, CF3, CF3M, Duplex & Super Duplex Steel A890 GR. 4A, 5A or F51, Special Materials in Monel, Alu. Bronze C95800, 95600 etc. Coatings may be provided for added corrosion or wear resistance. Hard-facing and weld overlays may also be supplied. Seats Options with metal-to-metal or bubble-tight resilient.
» Optional Bypass system, Dashpot & Counter-weight Assembly.
- Features
1. Low flow resistance
The streamlined valve body and the flow area of the valve seat are more than 1.4 times the flow area of the pipeline. Therefore, when the valve disc opens at a 40º stroke angle, the full flow area can be reached and the flow resistance is quite small.
2. Low self-closing pressure difference
The fully open flow rate is low. Due to the oblique large eccentric design of the valve disc and the fixed type of the two shafts, the shaft seal is sealed reliably. The valve disc and shaft are hingedly connected and equipped with self-lubricating bearings to minimize friction.
Therefore, the opening and closing pressure difference can be less than 19kPa, and the fully open flow rate is about 2m/s, which is much lower than other swing check valves, and it should not get stuck in the sewage medium.
3. Good sealing
4. Excellent dynamic characteristics
Due to the above structural characteristics, when the water flow reverses, the valve disc responds quickly. Coupled with the small stroke angle of 40º and the large diameter water flow diversion, the impact force of the valve disc on the buffer device is minimized, and the buffer cylinder greatly reduces the impact of the valve disc on the buffer device. Reduces water hammer when pump is stopped and achieves silent shutdown.
5. Long life
The unique metal-to-metal, two-eccentric and tilted design allows the valve disc to quickly detach from the valve seat when it is opened. The friction torque is extremely small and effectively protects the sealing surface. The cone surface sealing design of the valve seat enables the valve disc to self-lock after closing. Moreover, reliable sealing can be achieved under back pressure. After testing, even after opening and closing 100,000 times, its sealing performance still meets and is higher than the leakage index of the check valve. The static shaft design makes the valve disc only friction with the bearing during the opening and closing process, and the shaft seal itself is a static seal, which is very reliable.
Hot Tags: disc check valves, China disc check valves manufacturers, suppliers, factory, duckbill water valve, Stainless Steel Check Valve, check valve retrofit, Piston Check Valve, check valve for pharmaceutical industry, ss non return valve