Pneumatic actuators

Technical data on our current standard actuators is available here. We will be glad to send you information on custom actuators on request.


baelz 373-P11

For control valves/ejectors up to DN 125
Fo: springs at the top

pushing by spring force,
pulling by compressed air

Fu: springs at the bottom

pulling by spring force,
pushing by compressed air

Stroke12 / 16 / 22 mm
Spindle diameter10 / 16 mm
Housing materialaluminium (GD-AlSi9Cu3)
DiaphragmNBR
Weight2.1 kg

 

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baelz 373-P21

For control valves/ejectors up to DN 125
Fo: springs at the top

pushing by spring force,
pulling by compressed air

Fu: springs at the bottom

pulling by spring force,
pushing by compressed air

Stroke8 / 12 / 16 / 22 mm
Spindle diameter10 / 16 mm
Housing materialaluminium (GD-AlSi9Cu3)
DiaphragmNBR (silicone also possible)
Weightfrom 5.3 kg

 

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baelz 373-P22

For control valves/ejectorsup to DN 125
Fo: springs at the top

pushing by spring force,
pulling by compressed air

Fu: springs at the bottom

pulling by spring force,
pushing by compressed air

Stroke40 mm
Spindle diameter10 / 16 mm
Housing materialaluminium (GD-AlSi9Cu3)
DiaphragmNBR (silicone also possible)
Weightfrom 6.1 kg

 

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baelz 373-P31

For control valves/ejectors DN 150
Fo: springs at the top

pushing by spring force,
pulling by compressed air

Fu: springs at the bottom

pulling by spring force,
pushing by compressed air

Stroke44 mm
Spindle diameter22 mm
Housing materialaluminium (GD-AlSi9Cu3)
DiaphragmNBR
Weightfrom 27.7 kg

 

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baelz 373-P32

For control valves/ejectorsfrom DN 200
Fo: springs at the top

pushing by spring force,
pulling by compressed air

Fu: springs at the bottom

pulling by spring force,
pushing by compressed air

Stroke66 mm
Spindle diameter22 mm
Housing materialaluminium (GD-AlSi9Cu3)
DiaphragmNBR
Weightfrom 34.2 kg

 

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baelz 373-P41

For control valves/ejectorsfrom DN 150
Fo: springs at the top

pushing by spring force,
pulling by compressed air

Fu: springs at the bottom

pulling by spring force,
pushing by compressed air

Stroke44 / 66 mm
Spindle diameter22 mm
Housing materialaluminium (GD-AlSi9Cu3)
DiaphragmNBR
Weightfrom 55.5 kg

 

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Digital I/P positioner

baelz 87

The positioner is used to set the position of a valve according to a control signal.

It compares the corrective signal from the control system to the current position of the valve and issues a pneumatic signal.