For pneumatic actuators, our positioners and process controllers are mounted and tested ex works and are supplied as an entire system or as individual components. For motorized actuators, the controller is mostly fully integrated. If required, the positioner(s) in question can also be commissioned at their place of use by GEMÜ service engineers. In addition, other controllers can also be adapted to our pneumatically operated valves; please speak to your contact person or use the contact details listed on the website.

Due to their long stroke, globe valves have the best control characteristics. As well as selecting the appropriate controller, GEMÜ also designs and manufactures the regulating cone, the regulating cage or regulating needle in-house to specific customer requirements.

Depending on the area of application and the type and accuracy of control required, other valves, such as diaphragm valves, butterfly valves or ball valves, can be used for control tasks.

On the page Valve selection, GEMÜ provides various items of information to make it easier to define the "best" valve for open/close controls or automatic control systems. If a globe valve appears to be the best choice, the specification sheet for control valves can be completed in German or English. This information helps the quotation preparation, design and manufacture as well as selection of appropriate components. Alternatively, a control system can also be ordered (see below).

• Linear or modified equal-percentage control characteristics
• Functional safety in accordance with IEC 61508 and IEC 61511 (FMEDA), depending on valve type
• Gland packing suitable for vacuum up to 20 mbar, depending on valve type
• Design in accordance with (EC) no. 1935/2004 (K-no. 1935) optional
• ATEX on request

Scope of delivery of these products is the globe valve including regulating cone, regulating cage or regulating needle. Controller and accessories can be selected and additionally ordered from the extensive GEMÜ modular system.

In addition to the individual control valve, GEMÜ also supplies complete control systems. The valve type is then always preceded with the prefix PCS. For example, PCS 550 refers to a system solution based on the valve type GEMÜ 550. In addition to the control valve, the control system also includes the mounting kit, the appropriate controller and the compressed air line.

• Linear or modified equal-percentage control characteristics
• Three actuators available (plastic, aluminium, stainless steel)
• PI or PID control selectable
• Simple and fast commissioning
• Functional safety in accordance with IEC 61508 and IEC 61511 (FMEDA), depending on valve type
• Gland packing suitable for vacuum up to 20 mbar, depending on valve type
• Design in accordance with (EC) no. 1935/2004 (K-no. 1935) optional
• ATEX on request

Further information on the motorized globe valves with mostly integrated controllers is contained in the datasheets of GEMÜ 538, GEMÜ 548, GEMÜ 563 and GEMÜ 566.

Long-stroke globe valves are particularly well suited to control tasks, however, for some applications, other valve types are more suitable for the process. Examples of this would be for fibrous or abrasive media. For these, a diaphragm valve might be a good possible alternative. GEMÜ actuators and controllers can therefore be adapted to different butterfly, ball and diaphragm valve bodies.

• Wide selection of materials (plastic, metal, stainless steel), depending on valve type, nominal size and connection
• Wide selection of connections, depending on valve type, nominal size and material
• Simple and fast commissioning
• Various body surface grades possible, depending on valve type
• Vacuum-compatible designs possible, depending on valve type

The scope of delivery for these products is the valve in question. Controller and accessories can be selected and additionally ordered from the extensive GEMÜ modular system.