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SR-75 Single Acting Pneumatic Rotary Actuator Spring Return Corrosion Resistant

Categories Pneumatic Rotary Actuator
Brand Name: FLUITECH
Model Number: SR-75
Certification: SIL3/CE/ISO9001
Place of Origin: CHINA
MOQ: 1 Ea
Payment Terms: T/T, L/C, Western Union
Supply Ability: 50000PCS/Month
Delivery Time: 3-7 working days
Packaging Details: Wooden Case
Name: Pneumatic Actuator
Color: Silver
Type: Symmetric Type
Model: DRG-DA series
Stroke: 0-90° ±5°
Working Temp.: -20℃ - 80℃/-40℃ -80℃ /-20℃ -150℃
Body Material: Aluminum Alloy
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    SR-75 Single Acting Pneumatic Rotary Actuator Spring Return Corrosion Resistant

    Corrosion resistant SR-75 Single Acting Rotary Pneumatic Actuator spring return

    ► Technical data

    Rotation angle: 0° to 90°
    Air pressure:2.5~8bar(Double acting), 3~8bar(Single acting)
    Operating ambient temperature: Standard Type:-20°C~+80°C
    High temperature Type: 0°C~+180°C
    Low temperature Type: -45°C~+60°C
    Max Working Pressure:10bar
    Pressure: 5 to 10 bar
    Work media: Air (PNEUROP/ISO Class 4)
    Connections: ISO 5211 for brackets
    DIN 3337 coupling (star shaped)
    VDI/VDE 3845 for accessories
    NAMUR for work media
    Air supply: 1/4" - BSPP
    Surface material: Hard anodized - 40μm
    Life time: One million times
    Accessories: positioner, Air Filter Regulator, lock up valve, travel switch, handwheel, etc...

    ► Features

    Rack & pinion design
    Compact and light weight
    ISO 5211 mounting pattern
    Adjustable stops for both open and closed positions
    Accessory mounting dimensions to NAMUR specifications
    Machined gear teeth provide longest life and smoother operation
    High cycle life with low friction bearings on all moving and sliding surfaces
    Safety contained springs prevent hazards of inadvertent ejection during maintenance
    Corrosion resistant with hard anodized body, PTFE coated end caps, and stainless steel fasteners
    Modular design utilizing same body and end caps for both double-acting and spring-return versions


    ► The suggested safety factor for spring return actuator under normal working conditions is 30%-50%


    The torque needed by valve=80N.m

    The torque consider safety factor(1+30%)=104N.m

    Air supply=5Bar

    According to the table of spring return actuators’ output, we find output torque of SR 140K7 is:

    Air stroke 0°=308N.m

    Air stroke 90°=247N.m

    Spring stroke 90°=180N.m

    Spring stroke 0°=120N.m

    All the output torque is lager than we needed.


    During the restoration,the spring return actuators’ output torque will not be affected by the imputing air from the port B. On the contrary, it will help the restoration of springs.

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