Zhejiang nitrogen sealed pneumatic valve share downtown pneumatic valve when to use the handwheel institutions?

the development trend of intelligent pneumatic valve is to regulate, intelligent including regulation since the diagnosis of pneumatic valve; To reduce the product type, simplify production process; Intelligent pneumatic valve positioner, in general it is automatic, but when the source signal or electrical failure, or when the main components of the actuator ( Diaphragm, spring, etc. ) Damage, you need to change the automatic operation to manual operation, the need to turn the handwheel for adjustment of pneumatic valve adjustment function; Such institutions, on the other hand, also can adjust as pneumatic valve stroke limiter, when the signal pressure is zero, adjust the pneumatic valve is not fully open, fitted if process requirements regulating the flow of pneumatic valve has a small, can use the handwheel to achieve purpose.
the handwheel institutions have mounted and side mounted, roof mounted only for single direction limit, if the selection or installation, can choose side mounted according to the requirement of the process on the left or right limit.

all in all, the manual institutions can improve the reliability of regulating pneumatic valve operation, especially in regulating pneumatic valve add bypass, the regulating pneumatic valve with large caliber, using the handwheel institutions from investment costs or area are very economical. So when automatic operation to complete the normal and actuator trouble-free, because do not use manual institutions, often have to refuel anti-rust. （ According to tests, pneumatic valve)