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Single acting actuors PETRAS
Single acting pneumatic actuators up to 4 500 Nm at 5 barg supply pressure.
rotation : 90° - 120° -180° - 240°
Materials
- high grade aluminium
- cast iron
- carbon steel
- stainless steel
Hydraulic version available up to 200 barg supply pressure
Established in 1966, PETRAS is a pioneer in the design and manufacture of high performance pneumatic and hydraulic actuators for quarter turn valves.
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G Series:
A unique Scotch Yoke design incorporating a 5 degree off set in the scotch yoke mechanism which enables the maximum torque to be delivered at the closed position. This is ideal for butterfly valves, where the maximum torque is required at the seat break in and break out positions. The G series actuator range meets the latest Atex requirements and is produced in an ISO 9001: 2000 factory. Full traceability is available with each actuator, and a wide range of options are available. The standard G Series range has 15 Double acting and 15 Spring return Models and covers the Tomoe Valve range from DN40 - DN600.
Other models:
To fully complement the characteristics of the Tomoe butterfly valve design, a full range of Rack Pinion and Vane type actuators are available. All are sized to match the low torque benefits offered by the Tomoe seat design.
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rack and pinion actuators with 24 double-acting and spring-return models with torque outputs from 80 to 40,000 lb-in. Actuators comply with NAMUR, DIN 3337 and ISO5211 standards. Models available for 180 degree extended rotation and with accessories, including limit switches and manual overrides.
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VPVL-SS High-Performance Actuators
VALV-POWR® Series VPVL-SS double-opposed piston actuator is the Jamesbury brand of forged stainless steel actuators designed specifically for corrosive environments. Available in double acting and spring return versions, these actuators are ideally suited for a wide range of process applications.
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The Morin Partial Stroke Test Device (PSTD) was developed to allow users to test emergency shut-down valves without disrupting the process. The PSTD unit is locked out when the unit is in service and the valve functions normally. When the unit needs to be tested, the operator unlocks the device and inserts the stop pin, allowing for 15 degrees of valve travel to sufficiently test the valve package. Unlike electronic versions, you are guaranteed a hard stop and no over-travel, time after time, without any special calibration.
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Valve actuator that moves according to the amount of air pressure applied to a diaphragm.
Comprehensive selection of pneumatic actuators to meet every application.
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What makes SOMAS actuators so special? One reason is that they have been specially designed to cope with the requirements of the process industry for reliable operation and precise control. Our actuators are mainly intended for use with SOMAS valves , but they can be easily adapted for use with other valves demanding a 90 degree arc of operation.
We have spared no effort in order to eliminate any backlash between the moving parts of the actuator or between the actuator and the valve. This has created the neccessary prerequisites for pinpoint precision and has laid the foundation for accurate diagnostics.
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Standard EA Series Rotary Actuators
The standard EA series of actuators contains both gear driven crankshaft and hydraulic powered axial shaft actuators. They can be used with combustion air dampers and a wide variety of low, medium and high torque rotary shaft valve bodies with crankarms. The EA series can accommodate applications requiring position to be held or returned to normal position during power interruptions. Used for two-position floating and proportional electric control, these actuators are employed wherever it is desirable to move a load in either direction or to stop it at any point in the stroke. Typical applications include heat treat furnaces, ovens, heat recovery systems, and water and oil cooling systems. Eight base models plus variants are included in the complete product range, offering a variety of control action, motor voltage and frequency, torque, return action and optional features.
Features
- proportional actuators with builtin feedback potentiometer
- spring return and non-spring return
- 24Vac, 120Vac and 240Vac
- oil immersed gear train
- SPDT auxiliary switch
- compatible with VB series valves
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Petras offers a range of 3 positions pneumatic actuators up to 240° rotation available in double acting and single acting version.
System P03 range : 3 postions actuators with adjustable intermediate position :
- 3 positions 90° double and single acting for dosing applications
- 3 positions 180° or 240° for 3 ways valves
Established in 1966, PETRAS is a pioneer in the design and manufacture of high performance pneumatic and hydraulic actuators for quarter turn valves.
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Good reasons for this automation:
No radial forces have an effect on the shaft of the fitting.
This saves as well as the bearing and the packet
With the hollow shaft design or an adapter hub the required
Eckart rotary actuator can adapted to every Zwick high performance flap
Very fast control times (e.g. 90° in 0.2 seconds) can be realized
By the optimal end cushioning of the Eckart rotary actuator the
closing stop position of the fitting is also saved
The regulation of the volume flows is very simple and repeating exact
No additional lubrication is necessary
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ACTUATOR DOUBLES EFFECT (Abbreviation OF):
Actuators 1/4 turn KINETROL are distinguished from the other jacks by the technology of the axis-pallet:
- 1 only part moving: direct, precise movement and without play. Robust and fast apparatus
- Sealing pallets by lip seals: great lifespan (several million cycles return ticket)
- Modular Assembly of the options
ACTUATOR SIMPLE EFFECT (Abbreviation SE):
Constituted of 1 actuator doubles standard effect to which is added a return spring (modular assembly) assembled between the actuator and the element to be motorized for a return for lack of air.
- Cumbersome Spring spiral not very
- Spring placed in a case seals (sheltered driving air and ambient air thus protected from any risk of corrosion)
- Great lifespan without any maintenance.
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Actuators & Accessories
We provide a complete product line of actuators and accessories to meet all your valve automation requirements.
XOMOX Valves can be readily and inexpensively equipped with a variety of pneumatic, electrical or hydraulic actuators. We also supply a complete line of actuator devices and accessories (e.g. positioners, limit switches, solenoid valves, air filters, etc.) to complement your valving needs.
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The EXNM is a compact actuators. These are intended for the operation of:
-air control damper in ventilation and air condition systems up to approx 2mq.
Features:
Weight: only 4Kg
Mode operating:3Point or Modulating
3 point operating: The actuator moves the damper to its working position until it is powered. If the power supply is interrupted the motor locks the damper position.
Modulating operating: Just powered, the actuator moves the damper to its start position, then it moves to the position set by the control signal.
If the control signal is interrupted the Actuators return the damper to its original position.
The actuator is overload protected. The actuator can be mounted directly on the damper shaft if square, 12 x 12 mm or 10 x 10 mm (adaptor included); Several mounting brackets are available for applications where the actuator cannot be directly coupled to the damper shaft.
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-Explosion Proof rotary Actuators with spring return with torque from 4Nm up to 15Nm
-Explosion Proof rotary Actuators without spring return with torque from 4Nm up to 40Nm
-For smoke dampers and for air flow management dampers
-Power Supply from 24V AC up to 240V AC
-On-Off, 3 Point, Modulating- MFT Multifunction Technology
-Adjustable auxiliary switches
-Suitable for zone 1,21,2,22
-II 2GD EEx d IIC T6
-IP66
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Actuators (90° quarter turn actuators) for air dampers and smoke extraction dampers, explosion proof
Electrical, explosion proof quarter turn actuators series ExMax and RedMax, for air dampers and smoke extraction dampers, from 5 Nm to 100 Nm, in acc. with ATEX 94/9/EC for installation in hazardous areas zone 1, 2, 21 and 22, for all kind of gas, vapours, mixtures and dust. Actuators with or without fail safe spring return function. 24 to 230 VAC/DC multivoltage supply, 5 motor running times adjustable on site, on-off, 3-pos, 0...10 VDC, 4...20 mA mode, 100 % overload protected, robust aluminium housing with IP 66 protection, optional stainless steel version, integrated heater for use from -40°C to +40°C/ 50°C, cable connection, approx. 1 m cable, manual override, squared shaft connection 12 × 12 mm (size S) and 16 × 16 mm (size M). Series ExMax-... for use in zone 1, 2, 21 and 22. Series RedMax-... for use in zone 2 and 22. Optional accessories like external adaptable aux. switches, terminal boxes and mounting brackets available.
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Manual lever
The lever with return spring KINETROL brings to you the insurance of a position of safety per defect, without need for checking.
This type of lever, composed of 1 lever and 1 spiral spring, is ideal for:
- Samplings
- Purgings
- Applications of filling
The manual levers Kinetrol are approved ATEX zone 1 and 21:
ATEX II 2GD C 90°C -20°C Your 80°C
- Robust, tight and without maintenance
- The handle cannot be abandoned in bad position
- Provides the couple necessary in a reliable way
- Acts as time or anti-clockwise direction according to the choice
- Spring protected from corrosion
Levers with return spring standards ("dead men"):
Exist in 2 versions:
Male exit of axis
Exit mating plane ISO/DIN
Specific applications:
Lever with fuse for fire protection
Lever with case of contacts
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 see the results for the following category : Screw jacks |
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