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Valve Automation System

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Rack and Pinion Actuators


QTF Series Double Acting Pneumatic Actuator

Product Features
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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

QTF Series Single Acting Pneumatic Actuator

Product Features
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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

Epoxy Coated Actuator: ‘CL’

Product Features
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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

QTF Series

Product Features
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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

SSF Series – Stainless Steel Actuator

Product Features
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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

Super Seal -QTF Actuator

Product Features
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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

Spring Return Controlled By Limit Switch

Product Features
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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

3 Position Rotary Actuator, Double Acting/Single Acting 3 Position Mechanical Stopper

Product Features
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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 )

180 Degree Rotary Actuator

Product Features
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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

Regulating Actuator

Product Features
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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