The manufacturer can only produce wedge-shaped double gates; they cannot produce parallel double gates, and it’s not possible to do so for sizes below DN80?
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This post was last edited by security on 2011-4-11 09:18. The specifications for gate valves provided by the design institute require double gates, but the manufacturer can only produce wedge-shaped double gates; parallel double gates are not feasible, and such valves cannot be manufactured for diameters smaller than DN80. Domestic manufacturers are capable of producing parallel double-gate valves.
This post was last edited by security on 2011-4-11 09:18. Regarding the issue of double gates in gate valves, Jiangsu Yuanyang Valve Co., Ltd. can meet your requirements.
This issue is actually a flaw in the design; the person who designed it must have been a bookworm or an experienced engineer without any practical experience, and they simply followed the theories outlined in books. Our company has used parallel gate valves in the past, but this design suffers from significant friction between the two sealing surfaces over long distances during the opening and closing of the valve, which makes it very prone to damage. From a sealing perspective, the elastic wedge-type single gate valve is the best option, but it is difficult to maintain. The most durable type is the wedge-type double gate valve, as it can automatically compensate for wear and is also easy to repair.
Our company’s gate valves are also single-plate wedge gate valves, used in the steam extraction pipelines of power plants. Parallel double-plate gate valves are used in high-temperature conditions. What I would like to know is: at what specific temperatures are these valves used, and is there a defined temperature range?
Reply to 4# speeder1213: The design temperature is 350 degrees, and the pressure is 10.9 MPa
Dear netizen on the 5th floor, do you have any clear guidelines? Or your work experience?
The maximum temperature for the parallel double gate plates is 593 degrees, with a pressure of 4500# . . . . . . .