SPA-R Pneumatic Actuator

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 aluminium 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!

Main features

- Robust Rack & Pinion construction
- For dry or lubricated, filtered compressed air
- Plant-side lubricated for 1'000'000 cycles
- Hard anodized / epoxy coated body for excellent corrosion protection
- Multiple bolt circles according to ISO 5211-DIN 3337 for direct automation
- Top drillings according to NAMUR VDI\VDE-3845 for accessory mounting
- Visual position indicator
- Pre-compressed spring cartridges for safe dismantling