Valve | Symbols / Direction of flow | Flow in control mode | Valve stem | ||
|---|---|---|---|---|---|
VQ..46.. | VQ..46..Q | retracts | extends | ||
On/Off PICV VQP46.. |
|
| constant | closes | opens |
On/Off PICV VQI46.. |
|
| |||
CAUTION
The direction of flow indicated by the arrow on the valve body is mandatory!
The valves should preferably be mounted in the return pipe where temperatures are lower and where the sealing gland is less affected by strain.
Symbols
Symbol used in catalogs and application descriptions | Symbol used in diagrams |
|---|---|
| There are no standard symbols for PICVs in diagrams. |
Recommendation
A strainer or dirt trap should be fitted upstream of the valve to enhance reliability. Remove dirt welding beads, etc. from valves and pipes.
Do not insulate the actuator bracket, as air circulation must be ensured!