A brief overview of pneumatic gate valves and their use characteristics
Pneumatic gate valve Product profile:
Pneumatic piston gate valves are called gate valves. Because of its excellent shutdown performance, it has been widely used in industry. Rated pressure is 1.6.6.4MPa, diameter is between 40 and 600 mm, temperature is between -196 ° C and 500 ° C.
Characteristics of the
1 pneumatic gate valve actuator has positive and negative two functions, so the valve switch method including switching air. Compared with traditional globe valves, the disc uses a unique metal contact structure for reliable action and high cut-off performance. Leakage can reach 10-8×KV. Wide application range, temperature up to -196~500℃, diameter as small as 40mm, as large as 600mm. Three types of parallel, 60° V-shaped grooves and 90° V-shaped grooves are adopted to meet the needs of different uses.
2. When the medium is easy to clog, condense or coking after cooling, the valve body can be wrapped with insulation.
Material selection
1. Valve body, cover: ZG230-450 valve plate: 1Cr18Ni9Ti1.Cr18Ni9Ti Gate: 1Cr18Ni9Ti seamless steel tube piston: Cast aluminum alloy seal ring: oil resistant O-rubber.
2. Lining material: PTFE, the main technical parameters of flexible graphite.
3. The gate valve can only be closed under medium pressure to pass through the medium pressure sealing surface.
The sealing face of the sluice should be applied to the seat on the other side to ensure the sealing face is sealed. Most GATE valves use a forced seal, which means that when the valve is closed, the gate must be pushed against the seat by an external force to ensure that the sealing face is sealed.
preventive measure
1. Gate valve is only suitable for all kinds of pipelines or equipment, do not allow throttling.
2. The gate valve with hand wheel or handle should not be added when working. If the seal is not tight, the sealing surface or other parts should be checked and repaired. Turn the handle wheel clockwise to close, otherwise open. According to the product manual, adopt the belt drive gate valve.
