Pneumatic gate valve
Published: June 2, 2016 Author: 【191566.com】
Working principle of pneumatic gate valve
1. The actuator of the pneumatic gate valve has two functions: positive and negative. Therefore, the valve can be opened and closed in two ways: gas on and gas off. The gate valve adopts a unique metal contact type structure, reliable operation, and has extremely high shut-off performance, which is superior to the conventional shut-off valve. The allowable leakage amount reaches 10-8 ¡Á KV. Wide range of use, the temperature can be from -196 ℃ to 500 ℃, the caliber is as small as 40mm, as large as 600mm. The valve seat has three types of parallel, 60 ¡ã V-shaped notch and 90 ¡ã V-shaped notch to meet the needs of different applications.
2. The valve body can be insulated in the form of a jacket, which is used when the medium is easy to be blocked after condensation, condensation or coking.
Main performance parameter
Nominal pressure: 1.6, 184.108.40.206.6.4MPa
Operating temperature: -29 ～ 425 ℃ (carbon steel) -40 ～ + 550 ℃ (stainless steel)
Nominal diameter: DN50 ～ 800mm
Body material: 304.306.316L.WCB.HT200
Connecting flange: JB / T79. GB913. HG20592
Applicable medium: air, water, steam, oil and corrosive fluid such as nitric acid
Mode of action: cut-off, adjustable, manual control
Power supply voltage: 220VAC, 24VAC
Input signal: 4 ～ 20mA / 1 ～ 5VDC
0 ～ 20mA / 0 ～ 10VDC