Calculation formula of ammonia pneumatic steam ball valve ④ Limit switch: it transmits the signal of valve switch position remotely. There are mechanical type, proximity type and inductive type.
1. The conductivity of the medium shall not be lower than the specified lower limit value. If it is lower than the lower limit value, measurement error will occur, which will lead to abnormal use. If it exceeds the upper limit value, it can be measured even if it changes, and the indication error changes little.
