Tork-Mate Pneumatic Actuator - Series 890

Product catalog summary

Overview
The Tork-Mate 890 Series is a heavy-duty rack and pinion actuator designed for extended life, capable of up to 15 million cycles. It is suitable for operating 90° turn devices such as butterfly valves, ball valves, and more.

Design Features

Piston: Made from aluminum alloy for demanding applications.
Piston Bearing: Low friction wear band for extended life.
Piston Seal: Double acting PTFE O-ring energized seal for minimal friction.
Pinion: High strength steel, plated for corrosion resistance.
Pinion Bearings: Made from a proprietary high wear, low friction acetal compound.
Housing: Extruded aluminum alloy with a hard coat finish for wear and corrosion resistance.

Operation Principles

Double-Acting: Air pressure is directed to either Port 1 or Port 2 to rotate the pinion clockwise or counterclockwise.
Spring Return: Air pressure compresses springs to move pistons and rotate the pinion.

Advantages

Extended Cycle Life: Special piston seals and engineered components for superior service life.
Blow-out Proof Pinion Gear: Features a unique internal safety bar.
Modular Design: Easily removable end caps and modular spring packs.
Travel Adjustment: Pinion travel stops allow full +/-10° valve travel adjustment.

Specifications

Torque Output: Double-acting actuators produce up to 17,466 inch pounds (1973 Nm).
Operating Pressure: Maximum operating pressure is 125 PSIG (8.6 Barg).
Custom Options: Include Viton seals, high temperature trim, special finishes, and more.

Accessories

Position Indicators: Available with various hazardous classifications and certifications.
Solenoids: Suitable for every application with multiple certifications.
Valve Positioners: Available in 3-15 PSI and 4-20 mA configurations.
Integrated Position Sensor and Valve Controller: Compatible with various bus applications.

Contact Information
Corporate Headquarters: 1125 Willow Lake Boulevard, St. Paul, MN 55110 U.S.A. Phone: +1 651 484-5800. Additional locations in Brazil, China, New Zealand, and England.

Catalog excerpts

Tork-Mate Pneumatic Actuator - Series 890-1

Heavy DutyRack and Pinion Extended Life . . . Up to 15 Million Cycles >

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Tork-Mate Pneumatic Actuator - Series 890-2

1.Piston Aluminum alloy,designed for the most demanding applications. 2 3 8 > 2.Piston bearing 9 > Low friction wearband centers the piston for extended life. 6 12 5 > 3.Piston Seal A double acting,PTFE, O-ring ener- gized seal minimizes friction and requires an extremely low breakaway force. Provides a much longer life than conventional O-rings. 10 1 > 4.Pinion High strength steel,plated for corrosion resistance. Precisely ma- chined gear minimizes wear and backlash. 13 4 7 > 5.Piston Rack Precision engineered toothprofile and wide engage- ment with pinion minimizes wear and maximizes strength....

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Tork-Mate Pneumatic Actuator - Series 890-3

The Tork-Mate > 890 series extended life actuatorsare ideal for the operation of 90ΰ turn devicessuch as butterfly valves, ball valves, plug valves, damper valves and other devices. Tork-Matepneumatic actuators have features that areunique, providing many benefits to the userlooking for worry-free service. > The Tork-Mate 890 series actuators feature piniontravel stops that allow a full +/-10 of valvetravel adjustment. As an option, extended stroke adjustment screws can be added for inexpensivethrottling applications. > Special piston seals provide greatly extendedlife compared to standard O-ring...

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Tork-Mate Pneumatic Actuator - Series 890-4

(WITH INDICATOR SHOWN) (WITH INDICATOR REMOVED) size="-2">

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Tork-Mate Pneumatic Actuator - Series 890-8

All specifications subject to change without notice.Posi-flate ծ and Tork-Mate are registered trademarks of Posi-flate, St. Paul, Minnesota. Milton Keynes, England Bulletin 20316 (10/03/03) 14 Carters Lane, Kiln Farm, Milton Keynes MK11 3ER, EnglandPhone: +44-1908-564455For the latest product and contactinformation, visit our website: > Ω 2003 Posi-flate Corporate Headquarters 1125 Willow Lake Boulevard St. Paul, MN 55110 U.S.A.Phone: +1 651 484-5800 Additional Posi-flate locations: Sao Paulo, BrazilBeijing, China Auckland, New Zealand >

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