WIKA IV10 Operating Instructions Manual page 16

5. Commissioning, operation
Models IV10, IV11, IV20, IV21
Model IV10
EN
To avoid pressure surges, open the shut-off valve (blue) slowly.
The pressure is at the instrument connection now.
Models IV30, IV31
1. Open compensating valve (green).
2. To avoid pressure surges, open the shut-off valves (blue) slowly.
The pressure is at the instrument connection now.
3. Close compensating valve (green).
16
Model IV11
WIKA operating instructions, shut-off valves and valve manifolds
Models IV20, IV21