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Rack and Pinion Actuators

ROTEX have been designing and manufacturing world-class rotary actuators for well over 25 years. Our rotary actuators have either pneumatic or hydraulic capability. The number of possible applications is virtually limitless. We offer Single Acting and Double acting Actuators. Double Rack and Pinion Actuator Series “ECF”( Hard anodized body ) & SSF Series ( Stainless Steel Actuator ) with SIL3, ATEX & CE approvals.

rotary-actuator
Suitable for maximum working pressure 10 bar, Temperature range NBR -20 °C to +80 °C, PE -40 °C to +110 °C, Life more than 1 million cycles and the additional lubrication is not required, Our Double Acting Actuator models are available from ECF 32 to ECF 350 sizes and produces torque from 5 Nm to 5110 Nm at standard 7 Bar pressure. Our Single Acting Actuator models are available from ECF 32E to ECF 350E sizes and produces torque from 6 MN to 2543 Nm at Standard 7 Bar pressure.
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QTF Series Double Acting Pneumatic Actuator
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Rack & Pinion construction delivering torques upto 5000 Nm in a compact size
Maximum Working Pressure 8 bar, contact ROTEX for higher pressure
Life more than 1 million cycles.
Hard anodized body providing high corrosion resistance.
Additional lubrication is not necessary.
Anti blow-out pinion.
Pinion supported on large area of polyacetal bearings.
Temperature range :
NBR -20 °C to + 80 °C
PE -40 °C to + 110 °C
Can be converted to single acting by Just adding springs.
SIL3 capable

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QTF Series Single Acting Pneumatic Actuator
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Rack & Pinion construction delivering torques upto 3500 Nm in a compact size
Suitable for driving quarter turn & half turn valves
Hard anodized construction for superior resistance to environment & wear.
Unique Spring Retainer Construction.
Pre compression leads to longer spring life.
Easy assembling & dismantling of various combination of spring sets.
Modular spring construction permits combination of springs to generate optimim torque.
No lubrication required for springs.
Safe handling & dismantling.
Temperature range :
NBR -20 °C to + 80 °C
PE -40 °C to + 110 °C
Can be converted to single acting by Just adding springs.
SIL3 capable
End Stroke : +/- 10 Degree

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Epoxy Coated Actuator: ‘CL’
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The two pack epoxy coating is done on a Hard Anodized surface
of the Aluminium body by the spray technique. It produces a 100mu
thick layer (only external surfaces). This epoxy coating helps in
protecting the actuator from extremely corrosive environments.
Choose this option specially for alkaline environments. It is also
suitable for environments like Ammonia, Ammonia Liquor etc. ROTEX
guarantees 500 hrs. salt spray test.
Colours : Blue, Green, Red, Yellow

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QTF Series
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Rack & Pinion construction delivering torques upto 5000 Nm in a compact size
Maximum Working Pressure 8 bar, contact ROTEX for higher pressure
Life more than 1 million cycles.
WCB/ Carbon Steel body and covers
Additional lubrication is not necessary.
Anti blow-out pinion.
Pinion supported on large area of polyacetal bearings.
Temperature range :
NBR -20 °C to + 80 °C
PE -40 °C to + 110 °C
Can be converted to single acting by Just adding springs.
SIL3 capable
End Stroke : +/- 10 Degree

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SSF Series – Stainless Steel Actuator
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Double rack and pinion construction.
CF8M material for high corrosion resistance.
The pinion and piston are supported on polyacetal bearings
Maximum working pressure 8 bar
Additional lubrication is not required
Temperature range :
NBR -20 °C to + 80 °C
PE -40 °C to + 110 °C
Life more than 1 million cycles
Anti blow-out pinion
Unique spring retainer construction
Can be converted to single acting by Just adding springs.
SIL3 capable
End Stroke : +/- 10 Degree

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Super Seal -QTF Actuator
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Super Seal optionally avaliable with ECF Series
Polyethylene seals for an extremely long life.
Low friction , areas retaining grooves provides non stick slip movement.
Life over 3 million cycles.
The groove design is common for NBR & PE seals.
The alternative seals can be installed at later date
Highly recommended for high cyclic operation application.
Additional lubrication is not required
Temperature range :
-55°C to +110°C
Suitable for Non lubricated media like dry nitrogen.
Hydraulic media can be used up to 12 bar.
Can handle dirt & moisture

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Spring Return Controlled By Limit Switch
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Rack & Pinion construction delivering torques upto 5000 Nm in a compact size
The Actuator is suitable for coarse – fine adjustment, typically for batching operations
or processes
The Actuator has to be spring return
The operation sequences fixed from full open, partial open to full close
Infinite intermediate positions are possible with the limit switch
It can be fine tuned to the application easily
The settings can be changed at site with ease, by simply adjusting the third cam provided
It is applicable for 90° or 180°
Any ROTEX spring return Actuator can be converted into this arrangement by adding ROTEX
limit switch along with ROTEX NAMUR valve type 30138
The accuracy and repeatability depends upon the air pressure variation, change in the
torque of ball valve, change in density and the pressure of media, etc…
expected range 3% with all considerations

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3 Position Rotary Actuator, Double Acting/Single Acting 3 Position Mechanical Stopper
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The Actuator is suitable for coarse – fine adjustment, typically for batching operations
or processes
The Actuator has to be Double Acting
The repeatability is 100% since stopping is by mechanical stoppers. It is suitable for
application calling for the precise fine-coarse adjustment like liquid filling system
The Actuator can be switched to one, position from any other position very easily with
the solenoid control. The 3rd position is achieved by the mechanical stopping of the piston
movement, in the return stroke by pneumatic stopper pistons
The Intermediate position is present at 20% opening. The opening can be adjusted as
required by the set screw. This is field adjustable
The Actuator as a standard, works in reverse action, as opposed to conventional
configuration i.e. piston inward stroke opens the valve, and piston outward stroke closes
the valve
The End Stops (+/- 10 °C) are provided on the closing and opening side of
the Actuator for setting valve closing precisely
The springs can be provided to bring actuator to mid position as a standard
(optional attachment )

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180 Degree Rotary Actuator
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Ideal for line size above 50 NB
Compact and light construction
Tight shut off available for longer seat life, with the end stroke adjustment of the Actuator
Suitable typically for 3 way valves, requiring ON-OFF operation. It is available
in both Single Acting (spring return) or Double Acting versions
The Single Acting 180° Actuator can provide centre off for the 3 way ball valve,
bottom entry by choosing theoption, of 3 position
It can be converted to 3 position 0 – 90° – 180° Actuator for 3 way valves using
ROTEX Limit Switch and NAMUR valve type 30138
The end stop adjustment is provided for opening and closing direction as a standard
Actuator mounting is as per ISO 5211 and accessories to NAMUR
180° Actuator has 50% of torque value, of that of 90°Actuator

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Regulating Actuator
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Backlash free operation between rack and pinion makes ROTEX Actuator suitable for
regulation duty coupled along with positioner (pneumatic or Electro-Pneumatic)
Long life of the Actuator seals, the non wearing characteristic
of the mechanical parts ensure that the control action is maintained,
over the life time of the Actuator
It can be coupled along with the various types of valves
(Ball, V Port Ball or Plug, Segment Ball, Butterfly, Plug) or louvers and dampers
for variety of applications
Typical control schemes along with the regulating Actuator
includes provisions for:
1. Air failure safety includes stay-put or fail safe operation, like full close or full open
2. Power failure safety, including stay-put or fail safe operation, like full close or full open
3. Both air & power failure safety, including above
The Single Acting 180° Actuator can provide centre off for the 3 way ball valve,
bottom entry by choosing theoption, of 3 position
It can be converted to 3 position 0 – 90° – 180° Actuator for 3 way valves using
ROTEX Limit Switch and NAMUR valve type 30138
The end stop adjustment is provided for opening and closing direction as a standard
Actuator mounting is as per ISO 5211 and accessories to NAMUR
180° Actuator has 50% of torque value, of that of 90°Actuator

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