RACK AND PINION ACTUATORS

• ASR type: Spring return or ADA type: Double acting
• Rack and pinion design
• Rotation angle 90º ± 5º(by means of external travel stops)
• Antifriction sliding bearings
• Long life without maintenance
• Working temperature:
  • -30 ºC to 100 ºC in Standard Construction
  • -15 ºC to 150 ºC with FKM O-rings (high temperature execution)
  • -40 ºC to 80 ºC with Silicone O-rings (low temperature execution)
  • -60 ºC to 80 ºC with Silicone O-rings and 316 pinion (extreme low temperature)
• Maximum working pressure: 8 bar (120 psig)
• Total safety for spring replacement
• Mounting of solenoid valves acc. NAMUR Std
• Mounting of devices acc. NAMUR VDI/VDE 3845 Std
• Coupling according to ISO 5211 and DIN 3337
• Position indicator can be used also to operate mechanical limit switches or proximity detectors
• Options on request:
  • Fast acting
  • Stroke limiters
  • Epoxy coated body
  • Electroless Nickel Plated body and end caps
  • Locking Device
• Fully traceability of critical components (body, stem, pistons, end caps)
• Anti blow up stem

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SCOTCH YOKE ACTUATORS ACTREG

EVERY Actreg Scotch Yoke series actuator is built to provide long and efficient service with minimum maintenance.

The design, engineering and materials used in their construction ensure optimum performance even in the hardest environments.

Totally enclosed weatherproof centre-body and caps provided with o’rings to ensure the water ingress protection

The centre-body has a guide that supports transverse forces of the scotch and yoke mechanism and ensures proper alignment of the piston rod External travel stop screws allow a precise valve angular stroke adjustment between 80º to 100º

BODY + 10 different sizes from F10 (500 Nm) up to F60 (250.000 Nm).

1.  Internal o’rings to ensure water ingress protection.
2. NAMUR standard for all sizes for assembly of switch boxes and positioners.
3. Threaded parts in front and the back side of the body for easy assembly of a pneumatic control panel.
4. Possibility of a venting valve to avoid internal overpressures due to mechanical movements and to prevent the entry of water or corrosive elements.

INTERNAL BODY PARTS

4. Round rolled is used, reducing the friction between the yoke arm and pin, minimizing the wear.

5. Replaceable bearings protect the sliding and rotating components, suitable for either dry or lubricated working conditions.

6. PTFE thrust bar prevents yoke pin axial movement, transferring axial loads directly to the drive module case.

7. Connects the piston rod with the guide block, compensating for side load deflection and reducing wear on rod, bearings and seals.

TORQUE

The Scotch Yoke mechanism are manufactured in many different model number combinations of actuator sizes, cylinder diameters, and double or spring return action are available for installation on ¼ turn valves.

Scotch Yoke actuators are designed for use over a wide range of pressures or temperatures.

The scotch yoke mechanism is available in symmetric design to meet application specific valve torque demand requirements with minimum cost and weight.

Scotch Yoke actuators are provided with modular design. A pneumatic or hydraulic cylinder can be attached to either or both sides.

A spring cylinder can also fitted to either side for ESD (emergency shutdown) applications.

With large stock or finished and semi-finished components always available, actuators can be assembled and supplied with very fast and reliable deliveries

MODULAR VERSATILITY

HYDRAULIC PRESSURE:

Up to 100bar (1449 psi)

PNEUMATIC PRESSURE:

Up to 10bar (145 psi)

TORQUE OUTPUT:

Up to 250.000Nm (184.229 Ibf)

TEMPERATURE RANGES:

Standard -20ºC 80ºC Low Temperature -40ºC 80ºC High Temperature -20ºC 120ºC Other range of temperatures under request

SCOTCH YOKE – PRODUCT RANGE

SCOTCH YOKE ACTUATORS ACTREG

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