What are the execution standards for concealed cast iron gate valves
date:2024-07-01 08:53
Cast iron gate valve is a type of valve that has the characteristics of low flow resistance, high height, and long opening and closing time, but the disadvantage is inconvenient maintenance. There are two types of cast iron gate valves: wedge gate valve and parallel gate valve.
Execution standards for cast iron gate valves with concealed rods:
1. Design and manufacturing: in accordance with the provisions of GB/T12234-89
2. Structural length: According to the provisions of GB/T12221-89
3. Dimensions of flange surface: in accordance with JB79 GB/T9112-9131
4. Inspection and testing: According to the provisions of JB/T9092-99 and GB/T13927-92
What are the execution standards for concealed cast iron gate valves
Structural characteristics of concealed cast iron gate valves:
1. The structure is simple and compact, with a reasonable and innovative design. The rigidity of the valve is very good, the flow area of the channel is large, the medium is unobstructed, and the resistance is small;
2. The sealing surface is made of hard alloy and stainless steel, which have reliable sealing performance and long service life;
3. Cast iron concealed stem gate valves are filled with graphite material for easy operation;
4. Multiple driving methods can be used, such as manual, electric, pneumatic, gear transmission, etc;
5. The positions on both sides of the gate valve channel are symmetrical, so the medium can flow freely to both sides, making installation very convenient;
6. The structural length of cast iron concealed stem gate valves is short, and the manufacturing process used is good, with a wide range of applications;
