VB Valves Automation

ACTUATOR

Heavy Duty Scotch Yoke Actuator

16

Overview

A complete line of Scotch Yoke heavy-duty actuators are totally encapsulated, weather proof cast housing in Iron. These actuators provide torques from 3,000 to 500,000 lb. Scotch Yoke Actuators can be configured with high pressure hydraulic cylinders. Fail safe operation and spring pack fully encapsulated in factory weld cartridges for safety of operator.

Features

  • Designed to be used with bigger size Ball, Butterfly, Plug Valves, Dampers or other devices requiring a quarter-turn movement with high torque
  • Modular design thus simplifying the interchanging of spring module and cylinder
  • Totally encapsulated and weather proof housing in ductile iron
  • Symmetric Scotch Yoke mechanism ensures balanced operation
  • Integral guide in housing for piston rod

Benifits

  • Suited for a very wide range of torque
  • longer life cycle and smooth operation
  • bench-marked to international quality standards

Features

  • Rack & pinion construction, male shaft delivering torques from 200 Nm to 20720 Nm
  • Maximum morking pressure 10 bar, contact us for higher pressure
  • Life more than 1 million cycles.
  • Gr.III epoxy coated spring for high corrosion resistance.
  • Additional lubrication is not necessary.
  • Unique spring retainer construction.
  • Pinion supported on ball bearings.
  • Temperature range: NBR -20 C to + 80 CPE -20 C to + 125 C
  • Can be converted to single acting by just adding spring module kit.
  • SIL3 capable

DRS series scotch yoke actuators

  • Double acting torque – 63 Nm to 808626 Nm
  • Single acting torque – 17 Nm to 671957 Nm
  • Heavy duty, high performance design, with female shaft drive.
  • X seals and V seals for low wear and tear, each with grease retaining groove.
  • Yoke supported on life time lubricated ball bearings.
  • Internal tie rod to avoid corrosion and improve safety.
  • Non buckling, lifetime lubricated, epoxy coated springs.
  • Conversion from fail close to fail open possible by just interchanging spring and pneumatic modules.
  • Internally mounted hydraulic override.
  • Optional overrides: Mechanical override (SWH) / Hydaulic override (HMOR/MIBH)
  • Easy to convert from double acting to single acting.
  • Temperature range: NBR -20 C to + 80 C, Viton -20 C to +125 CEPDM -30 C to +110 C, Fluorosilicone -60 C to +110 C
  • SIL3 capable
  • End stroke: +/- 10 degree

Rack & Pinion Actuator

15

  • A,A Aluminium Actuators
  • Stainless Steel Actuators

Overview

Pneumatic actuators having double rack and pinion design are reliable, durable and have a long life. Meeting all the latest compliances, rack and pinion actuators cater to varied range of applications. Designed for compact construction and symmetric mounting position these actuators have high-cycle life and fast operation.

Features

  • Extruded aluminium body with internal as well as external corrosion protection
  • Multifunctional position indicator for visual position indication
  • Selected high quality bearings and seals that provides a wide operating temperature range, low friction and high cycle life.
  • Internal and external stainless steel fasteners for long term corrosion resistance
  • Designed as per the international quality standards

Benifits

  • Higher performance and reliability
  • Fully compliant with all the latest international standards
  • Wide range options in technical specification and highly cost-effective

QTF series double acting pneumatic actuator

Features

  • Rack & pinion construction delivering torques upto 5000 Nm in a compact size
  • Maximum working pressure 8 bar, contact us 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

Features

  • 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

QTF series epoxy coated actuator, option CL

Features

  • The two pack epoxy coating is done on a hard anodized surface of the Aluminium body by the spray technique. It produces a 100 ɥm 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. 500 hrs. salt spray test.
  • Colours: blue, green, red, yellow

QTF series carbon steel actuator

Features

  • Rack & pinion construction delivering torques upto 5000 Nm in a compact size
  • Maximum working pressure 8 bar, contact us 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

Features

  • 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 ust adding springs.
  • SIL3 capable
  • End stroke: +/- 10 degree

QTF series, super seal actuator

Features

  • 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

Features

  • 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 spring return actuator can be converted into this arrangement by adding Metso limit switch along with 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

Features

  • 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

QTF series, 180 degree rotary actuator

Features

  • Ideal for line size above DN 50
  • 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
  • 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 90 actuator version

QTF actuator for regulating service

Features

  • Backlash free operation between rack and pinion makes the 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 Metso 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 90actuator

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