casting design key points of a cast steel valves. To facilitate manufacturing model, core box and modelling: 1. Should not be used or reduce casting casting lumen, using core body should support, the fixed and discharge sand, should have enough technology hole when necessary. 2. For inside and outside and strengthening rib structure of castings, in the mold should have certain structure slope initiation direction. 3. Protruding parts and castings cast body should not have too big difference, USES the same height, the distance between the ipsilateral several convex platform, connected to the raised portion. 4. The appearance of the casting should try to be simple, in order to draw, should try to make the casting parting surface is flat, and the number of small. Second, to reduce the production of casting defects bias: 1. Should try to avoid the casting of large plane. 2. Casting of plane wall strengthened with flange casting hole, to reduce the casting wall thickness. 3. The casting cooling should be unhindered shrink as much as possible. ( 4) In the layer of large area should have a lot of connections in the cavity between the column, water, gas, etc. 5. Casting wall and wall connection should strictly prevent sharp corners and metal reunion, thick wall and thin wall should be gradually transition to the thick wall and thin wall, to prevent sudden changes, lest cause heat loose connection and the formation of hot crack, shrinkage and wait for a phenomenon. 6. Casting local thick section should be excavation or casting pore structure, and strengthening rib properly. 7. To maintain the uniform, casting wall thickness should be to prevent shrinkage and thermal cracking. When you need to ensure continuous curing condition, should as far as possible change a direction of wall thickness. When need to make sure that solidification conditions at the same time, should make it as far as possible with the same cross section thickness.

resilient seated gate valve resilient valve, as the name suggests, find extensive use in resilient gate valve institutions. Since cast iron valve has become much dependent on technology in today's world, there is wide use of such wedge valve.
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