перевод названия детали gen.

[Natalia1707]

Добрый день!

Кто-нибудь может подсказать как перевести на английский "обратноуправляемый клапан"????

Заранее спасибо!

[gni153]

check controlled/back pressure controlled valve

[Liquid_Sun]

The terms "direct" and "reverse" are frequently used when discussing control valves, positioners, and controllers. While the definitions of direct and reverse seem pretty straightforward, they cause quite a bit of confusion - especially when split-ranging is done.
The key to working with control valves and controllers is to remember that there must always be a balance maintained in the system. "Direct" and "reverse" are kind of like "positive" and "negative" in that where you find one you will usually find the other.
While control valve bodies and control valve actuators can be described as being direct acting or reverse acting, thinking about such things when working through a system problem only adds to the confusion. Therefore, it is always best to consider the FAIL SAFE mode of the valve and simply let the control valve be what it may be.
Positioners, 99% of the time, will usually mimic the input signal from the controller. That is, they will be DIRECT ACTING.

Another reason the direct-acting pneumatic positioner is so popular is that it can be by-passed and the control valve will respond to the input signal from the controller as though the positioner were in the control loop. If a positioner malfunction occurs or if the positioner causes the control valve to become unstable, it can be easily by-passed. Many control valves in the field are operating with a by-passed positioner.
Reverse-acting positioners are sometimes used on control valves, but their appearance is rare. Occasionally one will be found in a split-ranging sequence.
Two of the more common control valve uses are for pressure control. In both instances, the controllers are reverse acting. Most pressure-reducing valves will be fail-closed and most back-pressure control valves will be fail-open. If the pressure-reducing valve were fail-open or the back-pressure valve fail-closed, then the controllers would have been direct acting.

[Natalia1707]

Liquid_Sun, большое спасибо!