Gas liquid valve industry linkage pneumatic valve _ pneumatic components factory

Description of gas-liquid linkage pneumatic valve: long distance, large diameter high pressure natural gas pipeline in the event of a pipeline rupture of emergency, such as system requires a kind of can automatically shut off valves, such as gas and liquid linkage emergency cut off the pneumatic valve ( Hereinafter referred to as the gas-liquid linkage pneumatic valve) 。 Gas-liquid linkage pneumatic valve can work for the preset fault immediately, without any auxiliary manually, the valve automatically shut off, cut off the downstream piping, prevent gas leakage in great quantities, to avoid the loss of environmental pollution and reduce resource along the. Performance: the linkage pneumatic valve of gas and liquid gas liquid linkage pneumatic valve control system ( FIG. 1) Mainly by the air pipe, test tubes, gas tank, diaphragm mechanism, emergency lift valve, the control module and energy storage tank, etc. The system adopts the pressure drop rate as a control signal, easy to realize remote control and monitoring. If the pipeline rupture gas leak, when detected the pressure drop rate exceeds a given value, gas-liquid linkage pneumatic valve will automatically shut down. Linkage pneumatic valve gas and liquid to gas mains as the power source drive valve opening and closing, without additional power supply, air or hydraulic source. In an emergency without mains power source can also be used when manual pump control its opening. Gas-liquid balance linkage system control principle of pneumatic valve: pipeline rupture protection control principle is based on the diaphragm institutions respond to differential pressure change, through the system in the action of mechanism combination, natural gas as a source of power in the mains switch drive valve shut off. The valve fully open, the adjustable flow holes, diaphragm institutions, on/off gas tank, emergency lift valve, the benchmark cans and directional control valve control, etc. Specific pressure drop rate by completely adjustable flow hole to adjust the setting. Through the adjustment of the drain holes to ensure the normal pipeline diaphragm pressure fluctuation state institutions are not affected. Happen when the head of the online serious last pressure drop to achieve the set pressure drop rate, the institutions of diaphragm chamber of the side ( No spring side) In response. Is conditioned by the adjustable flow holes benchmark tank pressure stable interact with the former, a differential pressure on the diaphragm, diaphragm move outward drives the output shaft, two trigger the three-way switch valve closed, his P with his C from connected to cut off. His O pressure source of emergency lift valve, the valve core to O lateral movement, its his P with his C from cut to connect, power source by means of the shuttle valve shut gas tank into the gas tank, and the high pressure hydraulic oil into the hydraulic cylinder, quickly close the valve. Close the gas tank on the shuttle valve and isolate the control module. ； Retained in the hydraulic cylinder of the hydraulic oil is pressed into the KaiQi tank. When the main valve is closed, can produce pressure difference before and after the valve, make the shuttle valve installed in the main valve reversing, automatically select high side air as power input to the hydraulic cylinder. When the hydraulic cylinder reaches the end of the trip, installed on the valve position on the hydraulic cylinder linkage accordingly triggering ascension emergency valve, forcing the disc close to the seat, its his P with his C is cut off, keep the gas tank and hydraulic cylinder voltage regulator. Hydraulic cylinder in the emergency shut off position, the corresponding main valve also keep close, cut off the downstream piping, allowing for repair work. Hydraulic cylinder only after the two three-way switch valve by manual reset can be opened. Valve position linkage at this time no longer need to keep an emergency valve in the closed position. Gas-liquid linkage pneumatic valve can also be used to manually operate the handle or manual pump control its opening. Linkage pneumatic valve is suitable for the temperature of gas and liquid - 20 ~ + 80 ℃ medium on the pipeline as opening and closing device, purification of gas pressure drop rate set range to 0. 07 ~ 1. 5 mpa/min, mains nominal pressure PN 10 or less. 0MPa。 Gas-liquid linkage pneumatic valve is a kind of self actuated valves, install valve in the pipeline of natural gas energy through the air - medium pressure for driver Liquid device to drive the main valve, the pipeline system operation safety and reliability of plays a central role, when used to regular to power system operation and manual inspection. The machine manufacture outdoor installation, protective measures should be taken. : QV647TC pneumatic pneumatic valve precision ceramic electric pneumatic valve pneumatic spray pulverized coal pneumatic valve adjustment