供应意大利STI定位器-AL系列气锁阀

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供应意大利STI定位器-AL系列气锁阀
意大利STI http://www.sh-centorisi.com
产品名称：AL系列气锁阀
产品型号：AL102
产品简介：AL系列气锁阀由先导装置和三通阀组成一套，尺寸有1/4",1/2",1",1-1/2"
AL - Air-Lock
The Air Lock pressure static device (AL) is mounted on pneumatic actuators when they are to be isolated from control devices (positioners, electro-pneumatic distributors, etc.) whenever air pressure falls below operating safety point.
The pressure switch device AL has been designed to meet different air-lock systems, to guarantee a specific safety position of actuators, as required by the final control element. The Air-Lock device consists mainly in a pneumatic pressure switch with set point calibration. The hysteresis is 20 kPa (15 PSI) approximately. This item operates one or more 3-way synchronous commutators, depending on the function required.
Switching device operates immediately, also in case of a gradual air-pressure decrease to the set value. The differential avoids a continuous, inopportune commutation when air-pressure swings around the set point.
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