Swissfluid (USA), Inc.
10303 Greenland Ct
Stafford, TX 77477 USA
Phone +1 281 565 0097
Fax +1 281 565 0098
info@swissfluid.com |
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Pneumatic Actuators
90° Pneumatic Actuators SPA-R
SPA-R 90° Pneumatic Actuators are used for a wide variety of applications, and are particularly well suited for operating Swissfluid process valves, such as butterfly valves, ball valves or cylindrical plug valves. These actuators can be used for single-acting fail-close or fail-open applications as well as for double-acting setups, and can be fine-tuned at the fully open and fully closed positions. They come properly set up from the factory with the appropriate valve and can be adjusted in the field. The rack and pinion movement is operated by compressed air in both directions for double acting.
Single acting compressed air is used in one direction only, and heavy-duty springs control the movement in the other direction. In the event of a sudden lack of air pressure these actuators automatically default to a safety position, which can be fully closed or fully open depending on the setup and requirements.
These actuators are distinguished by solid aluminum bodies that have withstood the test of time; optionally the actuator bodies are available in stainless steel. The proven rack and pinion construction and the perfectly machined internal parts guarantee a long service life.
Depending on available air pressure torque values from 20Nm to 10'025Nm (at 6 bar / 87psi for double-acting actuators) are possible, or 12Nm to 5'980Nm for single-acting actuators and 6 bar / 87pis air pressure. The maximum allowable air pressure for these actuators is 8 bar / 116 psi. Due to their wide application range and compact industrial design pneumatic actuators are suitable for applications in temperatures ranging from -20°C / -4°F to 80°C / 176°F.
The actuators come with standard NAMUR pattern interfaces in accordance with VDI/VDE 3845 and feature a Double-D drive. Using adapters or couplings enables the actuators to be customized for special applications. Standard drilled mounting options per ISO 5211 (2 bolt circles as a minimum) can be expanded by the use of special mounting kits.
Visual position indicators are a standard feature of our actuators. They can be adapted to meet the exact customer requirements when combined with solenoid valves (24DC, 110V/AC or 230VAC), limit switch boxes with proximity or electro-mechanical switches, electro-pneumatic positioners (4-20 mA), silencers, throttling devices, manual overrides, air filter regulators, etc. Consequently, they offer near-limitless flexibility. The trouble-free function of these actuators is attained by 100% functional and sealing performance testing on electronic test stations.
Multipurpose SPA-R actuators from Swissfluid will regulate valves exactly to your preferences!
SPA-L Pneumatic Linear Stroke Actuators
Our Stroke Actuators convert pressure into linear movement and can be used as on-off devices or for control valve applications. They offer strong closing forces, are fast-acting, and are inherently explosion-proof. Depending on the type of model used, 5 - 7 bar (72 – 102 psi) air pressure is permissible and can be fully utilized.
Most commonly used as basic on-off devices, our linear stroke actuators are calibrated to work with a minimum air pressure of 4 bar (58 psi). At low pressures the integral spring units can be reduced also, allowing for perfect adaption of the attached valve. These spring units are automatically de-energized when the bonnet is removed. There are several actuator functions to choose from:
FC (fail closed): the valve is opened by air pressure and closed by spring force, resulting in the pre-determined final (fail closed) position.
FO (fail open): the valve is opened by spring force and closed by air pressure, resulting in the pre-determined final (fail open) position.
DA (double acting): the valve is opened and closed by air pressure, and has no defined basic position.
An optional, suitable adapter allows stroke limitation and emergency hand operation that can be combined with electrical feedback units. The flange-mount adapted unit enables the simple connection with a specific pneumatic or electro-pneumatic positioner (4-20 mA), thereby allowing full use of all control valve functions.
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 Process Valves and Automation
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