| Open position only depending on the pressure and not on the flow
|
|
| Bellows as assistance for opening
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| Hydraulically operated control valve
|
|
| Spring loaded control valve with pneumatic supplementary loading
|
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| Spring loaded control valve with magnetic supplementary loading and with magnetic lifting
|
|
| Solenoid control valve as spring loaded control valve with spring with higher adjustment and lifting solenoid in circuit closing connection
|
|
| Spring loaded control valve with magnetic supplementary loading (circuit opening connection)
|
|
| Spring loaded safety valve with limited and adjustable magnetic supplementary loading (circuit opening connection)
|
|
| Spring loaded safety valve
|
|
;)
