Housing

• Housing and hood are made of corrosion-resistant gravity die-cast aluminium
• Coating with silicone-free paint
• Colour RAL 7032 Pebble Grey
• The motor compartment is designed as a type “d” flameproof enclosure to DIN EN 60079-1
• Degree of protection IP66/67
• Options:
  • Custom colours

Synchronous motor

• Single-phase AC synchronous motor with permanent magnets, reversible
• 230 V ± 10%, 50/60 Hz ± 5 %
• ON time 100% duty cycle on request
• Short start/stop times
• Insulation class B to VDE 0530
• Synchronous motors maintain speed and positioning time irrespective of the load
• Options:
  • Custom voltages
  • Custom frequencies

BLDC motor

• Brushless DC motor
• Constant positioning time thanks to electronic speed controller
• Wide-range voltage input 90 V AC … 264 V AC, 120 V DC … 370 V DC
• High holding torque when the operating voltage is applied
• Manufacturer configured start-up and brake ramp
• ON time 100% duty cycle
• Insulation class B to VDE 0530 DC motor

DC motor

• DC commutator motor
• Voltage 12 V DC or 24 V DC
• Insulation class E to VDE 0530

Gearbox

• Spur gearing with straight-toothed steel gears
• robust, wartungsfrei
• Rugged, maintenance-free
• Permanently lubricated gears
• Self-lubricating sintered bronze bearings

Stroke unit

• Fixing bracket made of die-cast aluminium
• Spindle made of stainless steel
• Spindle self-locking
• NNeedle bearings to absorb axial forces
• Steel and bronze materials for good anti-seizure properties

Spindle

• Self-locking
• “Open/closed” markings indicate position
• Made of stainless steel

Electrical connection

• Connection by means of 1 m cable end or Ex “e” rated terminal box with spring-loaded terminals
• Customer-side wiring outside of the flameproof housing
• Electric anti-condensate heater
• Manual reset temperature switch 80 °C

Controller

• Open/close signal
• Options:
  • Additional potential-free contacts
  • Electronic position controller ESR-N with Profibus and USB interface for synchronous motors
  • Potentiometer 200Ω … 10 kΩ
  • Blocking protection by monitoring changes to the actual value of the potentiometer (only in conjunction with position controller ESR-N)

Ambient temperature

• -20 °C to +60 °C

Angle of rotation limited by snap-action position off switch

• Changeover switches with silver-plated contacts
• Switch connections routed to terminals
• Switching capacity: max. 6 A, 250 V AC
• Options:
  • Switches with gold-plated contacts
  • Switches with positive-break contacts

Position sensor for external position indication (optional)

• With potentiometer
  • Conductive plastic potentiometer (standard) or wire-wound potentiometer (including TÜV approval)
  • Multiturn potentiometer up to 10 turns
  • Gearing makes it easier to adapt the electrical angle of rotation of the potentiometer to the desired angle of rotation of the actuator
  • Special potentiometers with TÜV-approved form-fit attachment solution are available for electronic fuel/air ratio control
• With 4 ... 20mA transmitter
  • Gearing makes it easier to adapt the electrical angle of rotation of the transmitter to the desired angle of rotation of the actuator
• With Hall sensor
  • The wear-free absolute encoder that makes use of the Hall effect is particularly suitable for continuous operation in potentially explosive atmospheres

Manual operation (optional)

• The position of the input shaft and valves can be moved manually using a handwheel
• Disengaging the gear train and motor reduces the amount of force required
• Position switch-off settings are retained during manual operation
• The handwheel remains motionless during electrically powered operation

Options

• Other voltage/frequency
• Handwheel
• Additional auxiliary position switches
• Custom control cams
• Electronic position controller ESR-N (in conjunction with synchronous motor)
• Position sensor
• Relay for switching several actuators in parallel
• Potentiometer
• Components to UL standard
• Spindle protected by bellows
• Set collars serve as external travel stops

Assembly

• Easily mounted thanks to stable cast angle bracket and steel angle section attached to housing
• Connecting pin supplied to connect spindle with valve
• No-fuss coupling to valve stem by means of:
  • Lever arm, clamping lever, ball-and-socket joint, connecting rods, sprung connecting rods

Safety instructions

• In a potentially explosive area, ensure the device is isolated from the power supply before the hood of the flameproof encapsulated housing is opened by a specialist. The waiting time specified on the rating plate must always be observed!