VALVE ACTUATION

ACTUATED VALVE SERVICES

image descriptionGlobal Supply Line (GSL) has been operating as a primary supplier of actuated valve packages for over 20 years, establishing itself as a leader in providing quality products and premium service levels in quick delivery.

As a major stockist of valves and actuators, Global Supply Line are an independent specialised ‘one stop shop’ for the provision of
valve/actuator supply.

Global Supply Line engineers can size the valve you require, then our automation facility can fit actuators and accessories and undertake torque testing and hydrostatic and pneumatic testing all in-house.

We can provide your choice of actuator brand or our range of ex-stock brands. Global Supply Line manufacture and stock mounting kits & drive adaptors as well as declutchable gearboxes. GSL design and supply failsafe systems, control panels etc. We perform all fitting, instrumentation
and testing.

After assembly each actuated valve is subjected to: function/ stroke test, travel stops are adjusted, open & close speed timing is verified, testing of solenoid valve to ensure functionality, and finally a limit switch check for position accuracy leak test of instrumentation and piping.

Our own large stocks combined with our stockist & short delivery manufacturing supply base enables us to provide all requirements from standard on-off valves to bespoke valve/actuator packages. We can provide tailored procurement solutions ranging from one-off’s to large scale projects. Our independence and knowledge of the market allows us to advise and source the most suitable package based on commercial, delivery & technical considerations.

image descriptionWe are also agents for CVS Controls Canada ‘E’ body globe type control valves. Our Adelaide engineering facility supports the CVS range in Australia.

ACTUATOR SELECTION PROCESS

image descriptionThe selection of the most suitable actuator is determined by the duty cycle of the valve and the available power source. Global Supply Line engineers will select and size the actuator based on the required torque and safety factor. The safety factor will increase for shutdown valves and infrequently operated valves as well as for valves used in service with
particulates in the media.

Temperature, seat type and numerous other factors are also analysed and entered into actuator sizing software. We will analyse process fluid type, required operating speed, fail safe requirements, area classification, temperature and environment. Finally we will discuss with you ease of field use, maintenance, brand options, gear over-rides, positioners, solenoids etc. to come up with a valve actuation package that ensures the best balance of reliability, ease of maintenance and cost effectiveness. In-house torque testing capability provides assurance of correct sizing.

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ACTUATION SELECTION CRITERIA

QUARTER TURN

PNEUMATIC

Pneumatic actuators are available in spring return and double acting in 90º and 180º operation. Pneumatic actuation is inherently safe, simple, maintenance free and cost effective. Furthermore pneumatic actuators are mass produced and there is ready availability of options such as:- spring packs for fail-safe systems, pneumatic or electro-pneumatic positioners for modulating control as well as control accessories such as limit switches for accurate process monitoring.

Actuated ball, plug and butterfly valves require maximum torque delivery at the breakaway point (break to open). This is especially important for safety shutdown ball valves which are infrequently operated resulting in increased torque requirements to break open the valve. Depending on the factors mentioned above in the “actuation selection process” section, the required safety factor can be over 100%.OAPVTorqturnActW

Scotch-yoke actuators are ideal as they use leverage to vary the relationship between the piston force and the drive point providing maximum torque at the beginning and the end of the 90º rotation which correlates with the torque curve need for most quarter turn valves like ball & high performance butterfly valves. Furthermore, being steel case and heavy duty design they are much more rugged, reliable and dependable for critical shutdown applications and are available in much larger torque ranges.

Through our own stocks as well as other Australian & overseas partner actuator and accessory suppliers, we can supply actuated valves in a quick turnaround.

Global Supply Line supplies and stocks both rack & pinion (Air Torque – Italy) and scotch yoke (APV-Torqturn, Actreg, Sferova and Air Torque) pneumatic and hydraulic actuators for quarter turn valve automation. If preferred we can also supply Bettis, Rotork or Biffi. We also stock a full range of Italian made 316SS ISO brackets and adaptors.

ELECTRIC

image descriptionElectric actuators are compact and efficient and are used where air and hydraulic supply is not available. They are generally only for on-off service, not fail-safe service. Electric actuators are available in isolating, regulating and modulating and can be supplied in 3 phase as well as single-phase AC and DC.

HYDRAULIC

Hydraulic actuators are suited to operating 90º turn valves such as ball, plug and butterfly valves. Linear piston style is also available for gate and globe valves. Double-acting and fail-safe spring return styles are available, utilizing hydraulic oil up to 35,000 kPa.

Hydraulic actuators are generally used when very high torque is required to operate larger valves or where pneumatic or electric supply sources are not available. A major advantage (especially for off-shore rigs etc) is the size and weight of hydraulic actuators is much smaller.

MULTI-TURN

ELECTRIC

image descriptionMotor-operated actuators are can be supplied and are intended for rising stem valves such as gate and globe valves for on and offshore applications.

Multi-turn electric actuators are specified by evaluating torque, stem size, stem thrust and stroking speed as well as voltage and frequency. The force required to operate the valve under specified service conditions in terms of torque and thrust is analyzed by using actuator manufacturers software.

Three phase motors are recommended for larger valve applications. Facilities for local, remote and manual over-ride operation are generally standard.

APPROVED AUTOMATION CENTRE

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Global Supply Line Engineering are the approved Starline, Air Torque, Australian Pipeline Valve, Torqturn, Diamond Gear, JC, Sferova and CVS Service & Automation Centre for Australia, New Zealand and Papua New Guinea.Click on logos above to view approval letters.

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VALVE ACTUATION OPTIONS

ACTUATOR STYLE

  • QUARTER TURN PNEUMATIC SCOTCH-YOKE
  • QUARTER TURN PNEUMATIC RACK & PINION
  • QUARTER TURN HYDRAULIC
  • LINEAR HYDRAULIC
  • LINEAR PNEUMATIC
  • SUB-SEA PNEUMATIC
  • SUB-SEA HYDRAULIC
  • QUARTER TURN ELECTRIC
  • MULTI-TURN ELECTRIC
  • ELECTRO-HYDRAULIC
  • GAS OVER OIL
  • HIGH PRESSURE GAS
  • SELF CONTAINED POWER SOURCE
  • ELECTROTHERMAL SHUT-OFF

VALVE TYPE

  • BALL
  • BUTTERFLY
  • CONTROL
  • GATE
  • GLOBE
  • KNIFE GATE
  • PLUG

OPERATION

  • FAIL SAFE
  • REGULATING
  • MODULATING
  • ON/OFF

ELECTRIC ACTUATORS

  • Quarter turn
  • Multi-turn for linear operation
  • General service or explosion proof
  • On/Off or modulating control
  • Multi-voltage
  • Fail-safe electro-hydraulic

HYDRAULIC ACTUATORS

  • Hydraulic (water or oil)
  • Gas over oil

ACCESSORIES

  • Mounting brackets
  • Solenoid valves & limit switches
  • Multi-voltage: general purpose, intrinsically safe & explosion proof
  • Pneumatic & electro-pneumatic, analogue & digital positioners for quarter turn & linear operations
  • Breather blocks / closes loop piping
  • Speed controls
  • Visual beacon indicators
  • Filter/ pressure regulators
  • Block & vent valves
  • Air or hydraulic accumulator tanks
  • Gear over-rides
DualCompact-RP-Actuator

PNEUMATIC ACTUATORS

  • Quarter turn
  • Rack & Pinion and Scotch-yoke
  • Spring return (fail close or fail open)
  • Manual over-ride option
  • Double acting
  • ISO 5211 & NAMUR interface
  • Linear cylinder double acting
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BRANDS AVAILABLE

ACTUATORS

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  • Pneumatic & hydraulic piston style heavy duty ¼ turn for pipeline valves, spring return and double acting
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  • Pneumatic compact rack and pinion, aluminium case ¼ turn
  • Pneumatic piston style heavy duty scotch yoke ¼ turn for pipeline valves
  • Heavy duty compact actuators oil & gas applications click here
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  • Pneumatic piston style heavy duty scotch yoke ¼ turn for pipeline valves
  • Spring return and double acting
  • Linear, hydraulic and pneumatic
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  • Pneumatic piston style heavy duty scotch yoke ¼ turn for pipeline valves, spring return and double acting
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  • Hydraulic heavy duty scotch yoke ¼ turn spring return (*Bettis® E Series style copy) 14 bar to 140 bar operating pressure.
    Click here for brochure.

ACCESSORIES

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  • Positioners
  • Transmitters
  • Deadman levers
  • Hand pump power packs
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  • Worm gearboxes, ¼ turn
  • Declutchable ¼ turn gearboxes
  • Multi turn bevel gearboxes
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  • Positioners
  • Monitors
  • Transmitters
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  • Solenoids
  • Position indicators
  • Pilot valves
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  • Solenoids
  • Filters
  • Regulators
  • Pilot valves
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  • Valves
  • Filters
  • Tube fittings
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  • Solenoid valves
  • Control valves
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  • Valves
  • Tube compression fittings
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  • Fuseable link fire shut off operators
  • Thermal fire shut-off spring packs
  • Deadman levers
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Click on catalogue above & below to view.

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*Bettis® is a registered trademark of Emerson Process Management and is not associated or affiliated with CVS Controls Ltd in any way.

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