Single Acting double acting Rotary Pneumatic Actuator spring return
► Description
2 inch size pneumatic actuated stainless steel material ball
1. Actuator type: Double acting, also have single acting
2. Ball valve size: DN50 thread connection Actuated ball valve
3. Connection: thread with BSPT, G and NPT
4. Fluid: Air, Water, steam, water treatment
5. Pressure class: 1000WOG
Actuator:
Full conformance to the specifications of: ISO5211, DIN3337, VDI/VDE3845, NAMUR.
The extruded high strength aluminum bodies are precision honed and hard anodized yielding an internal bore surface that can provide low coefficient of friction, smooth performance and a long service life.
All acting surfaces are fitted with high quality bearings, resulting in low friction, quite and high cycle life.
The two independent external travel stop adjustment bolts can easily and precisely adjust up to ±5º at both open and closed directions.
Multifunction position indicator with NAMUR standard is convenient for mounting accessories.
Pre-compressed load springs are convenient for safe mounting and disassemble operations.
Die-casted aluminum pistons and end caps are high strength and light weight.
Optional Viton and Silicone seals are available for low and high temperature
► Features
- Extruded aluminum ASTM6005 body with both internal and external corrosion protection having honed cylinder surface for longer life and low coefficient of friction.
- Dual piston rack and pinion design for compact construction, symmetric mounting position, high-cycle life and fast operation, reverse rotation can be accomplished in the field by simply inverting the pistons.
- Multiple bearings and guides on racks and pistons, low friction, high cycle life and prevent shaft blowout.
- Modular pre-loaded spring cartridge design, with coated spring for simple versatile range, greater safely and corrosion resistance, longer cycle life.
- Fully machined teeth on piston and pinion for accurate low backlash rack and pinion engagement, maximum efficiency, stainless steel fasteners for long term corrosion resistance.
- Full conformance to the latest specifications: ISO5211, DIN3337 and NAUMR or product interchange ability and easy mounting of solenoids, limit switches and other accessories.
- Fluitech has a complete line of rack and pinion actuators, which is the best choice for butterfly and bass valves control. Reliable, reality available products supplying in a broad of operating environments. Our products are NAMUR & ISO5211 compliant and are manufactured under ISO 9001:2000 certification and are CE approved.
► Sizing spring return actuators
Example:
The max torque needed by the butterfly valve=104N.m
The torque after opened(operating)104X30%=32N.m
Air supply=5Bar
Air stroke 0°=134N.m>104N.m
Air stroke 90°=74N.m>32N.m
Spring stroke 90°=172N.m>32N.m
Spring stroke 0°=115N.m>104N.m
The above data show the actuator’s torque can satisfy the requirement of the butterfly valve.
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