Gas valves are widely used for a variety of city gas pipeline network system media pipeline gas, liquefied petroleum gas, natural gas and oxygen. Drive in the form of a manual, worm gear, electric, pneumatic, hydraulic, electro-hydraulic actuator linkage, enabling remote control and automation.
2015年2月9日星期一
Pneumatic actuators and instrumentation control gas burner valve performance comparison
Meter-off Range Top Burner Valve with remote operation, the Gas Burner Valve off quickly and so on, but the meter Gas Burner Valve cylinder larger, higher installation space requirements, while the high investment, the Gas Burner Valve needs to DCS to operate, require laying of cables, purchase barriers and DCS card parts and other system resources; control Gas Burner Valve failure rate is higher, will be affected by loss of power Gas Burner Valve, solenoid Gas Burner Valve failure, DCS barrier and cards, and many other factors of failure, causing the Gas Burner Valve to malfunction. Author's PTA plant in pot root zone PX tank Gas Burner Valve transformation process, have encountered since the normal discharge Gas Burner Valve solenoid energized, causing the Gas Burner Valve to close and cause the device parking situation.
Pneumatic actuators installed smaller, cost only half of the same caliber instrument control Gas Burner Safety Valve. Pneumatic actuator gas source driver switches are required, after each selection on or off, the Gas Burner Valve is on hold after the action in place, not because of external factors interference caused the sudden closure of the Gas Burner Valve, to avoid production fluctuations. Pneumatic actuators can also be required, with explosion-proof solenoid Gas Burner Valves and back to the hearing, DCS remote access control Gas Burner Valves, Gas Burner Valve echo divided into two type switch and 4 ~ 20mA analog continuous Gas Burner Valve type. Equipped with a Gas Burner Valve controller can achieve 4 ~ 20mA analog input adjustment control.
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