disc check valve Description
Disc check valve is a type of swing check valve. Its core feature is that it uses a disc-shaped valve disc as the opening and closing part, and realizes one-way flow control by rotating around the rotating shaft of the valve seat channel. This valve is designed for medium and large diameter, low flow rate and stable flow state pipelines, especially for scenes with high risk of medium backflow.
Classification dimensions:
By the number of valve discs: single disc (conventional diameter), double disc (DN≤600), multi-disc (DN>600), multi-disc design can disperse the closing impact force;
By sealing form: metal hard seal (resistant to high temperature and high pressure), elastic soft seal (adaptable to corrosive media).
Core structure and working principle
Structural composition
Valve body: mostly made of cast steel, stainless steel or alloy, suitable for pipe diameters from DN15 to DN3200;Disc disc: made of metal or composite material, with rubber/PTFE surface covering to enhance sealing;Shaft mechanism: supports the rotation of the disc, and requires regular lubrication to reduce wear (some designs integrate self-lubricating bearings);Sealing surface: streamlined channel design to reduce medium flow resistance (flow resistance coefficient ≤ 0.3).
Working principle
Forward flow: The medium pressure pushes the disc to rotate around the shaft to open. The larger the flow, the larger the opening angle (up to 90°);Reverse backflow: The disc closes quickly under the action of gravity, medium reverse thrust and spring assistance (optional) to block backflow
disc check valve Specification
|
Nominal size |
2"~40"(DN50~DN1000) |
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Nominal pressure |
Class 150~Class 2500(PN10~PN250) |
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Standard: |
API 6D, API 594,ASME B16.34 |
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Body material |
Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel |
|
End connection |
RF, BW, RTJ |
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Product Name |
SYNHE Stainless Steel Check Valve |
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Certificate |
API,CE,ISO,EAC,TS |
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Connection End |
FF Thread(G.NPT,BSPT,BSP,DIN259/2999) |
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Suitable Medium |
Water, Oil And Some Corrosive Liquid |
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Working Temperature |
-40 to 300 Degree C |
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MOQ |
10 PC |
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Term of Payment |
30%TT Deposit, the balance is paid before shipping the goods |
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Package |
Plastic Bags-------Paper Boxes-------Cartons-------Plywood Cases |
|
Delivery Time |
15-30 Days According To Order QTY |
|
Shipment Port |
Tianjin, Ningbo, Shanghai |
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Capacity To Produce |
10000Pcs/Week |
disc check valve
Performance characteristics and selection points
Advantages and characteristics
Small flow resistance (about 35% lower than lift check valve), suitable for low flow rate and high flow scenarios;
Flexible vertical/horizontal installation, no strict direction restrictions (when vertically installed, ensure that the medium flows from bottom to top).
Limitations and precautions
Weak sealing performance: Not suitable for occasions with high-precision anti-leakage requirements (such as hydrogen pipelines);
Pulsating flow restriction: Systems with frequent start-stop or drastic flow fluctuations need to be used with buffer devices;
Installation and maintenance: Large-diameter valves (DN≥600) need to be equipped with an inspection platform and the shaft wear should be checked regularly.
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