Control valves

STÖHR ARMATUREN has designed a bellows-driven pneumatic actuator especially for applications with radiation.
This development avoids damage to plastic parts and ensures maintenance-free operation without gas emissions to the environment.

Special feature:

• radiation proof
• maintenance-free
• free of gas emission

Depending on the valve series, our valves can be equipped with a manual drive (handwheel), pneumatic piston actuator, pneumatic diaphragm actuator, electric actuator, hydraulic driven actuator or solenoid actuator. Available combinations can be found in our product catalogue or on this website.

Depending on the requirements of your application, manual override may be required on automated actuators to close the valve in the event of a malfunction, such as power failure or loss of pressure in the pneumatic line. STÖHR ARMATUREN offer manual override as an option for many types of actuators. Please specify your requirements when requesting a quote. 

We use our own pneumatic piston actuator for globe valves of up to size DN 100, and source piston or diaphragm actuators from well-known manufacturers for other applications. The standard operating pressure is 6 bar. 

Our piston actuator can be customised to suit special operating conditions such as non-industry standard operating pressures, stainless steel manufacture for installation in a marine environment, use of radiation-resistant materials, exclusion of non-ferrous metals, or vacuum-tightness to the environment. 

Our valves are available with electric actuators from well-known manufacturers for shut-off. Please specify the required electrical performance parameters (direct or alternating current, voltage, etc) when requesting a quotation.

In addition to actuators using electric motors, valves from STÖHR ARMATUREN can also be equipped with solenoid operated actuators sourced from well-known manufacturers.

We buy diaphragm actuators for control valves from well-known manufacturers. The brands and products we use are listed in our product catalogue or contained in your offer. ATEX-approved types are required for use with flammable media. If you prefer manufacturers or types other than those we offer as standard, please let us know and we will check for alternatives. 

Compressed air is usually used as an operating medium, but nitrogen or intrinsic gas supply may be possible. The standard pressure supply to the pneumatic actuator is 6 bar maximum. If you require another pressure level, please let us know in your quotation request. 

All STÖHR products adhere to the following standards:

• Pressure-bearing parts made of solid material
• Housing and connections made of stainless steel or special steel
• High tightness of the first spindle seal to the outside using a bellows seal
• Additional safety of the second spindle seal using an O-ring or metal ring
• Media-adequate use of materials (steels and seals)
• Fulfillment of the required industry standards according to European regulations
• High operational safety
• Low maintenance and spare parts requirement
• Very low failure rates
• Long lifetime
• Low lifecycle costs

detailed description

Our customers experience the following advantages:

• Expert advice and support from true product specialists
• Bespoke products manufactured to your exact specifications 
• Help to define your requirements to suit your project
• Products supplied ready for installation 
• A fast and effective response to any incidents
• Long-term replacement supply

detailed description