WIKA IV10 Mode D'emploi page 22

8. Dismounting, return and disposal
Models IV10, IV11
1. To avoid pressure surges, open the shut-off valve (blue) slowly.
2. In case the valve is equipped with a vent connection, open this
connection with a suitable tool. Remove plug screw/vent screw (if
EN
available).
The valve can be dismounted now.
Models IV20, IV21
1. To avoid pressure surges, open the shut-off valve (blue) slowly.
2. Open the vent connection with a suitable tool. Remove plug screw/
vent screw (if available).
3. Open the vent valve slowly (red) to depressurise the valve.
The valve can be dismounted now.
Models IV30, IV31, IV50, IV51
Models IV5x only
1. Open compensating valve (green).
2. To avoid pressure surges, close the shut-off valves (blue) slowly.
3. Remove plug screws/vent screws (if available).
4. Only for models IV5x: Open vent valves (red) slowly.
The valve can be dismounted now.
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Vent (red)
WIKA operating instructions, shut-off valves and valve manifolds
Compensate
(green)
Vent (red)
Models IV5x only