Design Features
QT series electric actua tors are designed & eng ineered for robust, reliable and for high performance d uty onto quarter turn valves. Th e unique reliable motor m odule, adjustable cam plate lim i t s witch, self locking mechanism, precision g earing system and ball bearings, the auto declutching m echanism, light force lo ad on the hand-wheel, the adapt or drive bushing and bo t tom ISO 5211 mounting dimensi on, are advantages aga inst
others in the field of va lve automation. CE appr oved
SELF LOCKING MECHANISM
Because of the worm gear design system, all the electric actuators are self locking.
HEATER
For prevention of condensation due to weather & temperature changes, and also keeps internal components clean & dry, a 20 watt space heater is provided inside all the electric actuators.
ENCLOSURE
Standard enclosure to water jet pr oof & water tight proof IP 67 and EXCT4(on request)
HANDWHEEL
Correct size of hand-wheel on the electric
actuator ensure adequate strength for safe and efficient emergency operation.
MOTOR
Squirrel cage motor is of encapsulated type, on high stall torque and low inherent force for seating &
unseating of valves. All motors are integrated with build
-in thermal protection.
MANUAL OVER-RIDE
Engage by pulling the lever & turning the hand- wheel. Lever is auto declutch vvhen power supply is switched on, and hand-wheel does not turn as extra safety feature.
TERMINAL CONNECTION & WIRING
Terminal connections are of "WAGO" push on type, making wiring connection very easy & without fuss. Elect rical wiring circuit is
standardized for single & three phase
voltage. Addition termination is available on request.
INTERNAL COMPONENTS ARRANGEMENT
Internal mechanical and electrical components are designed in modular mounting arrangement, and can be easily removed for maintenance purposes. Addition
optional accessories are also possible.
LIMIT SWITCHES
A pair of limit switches are activated by means of simple, reliable & adjustable cam plates, mounted
directly onto, and driven by center column. The unique cam plate design does not allow over travel of limit
switches. (Only on basic type)
TORQUE SVVITCHES
ELectric actuators on 100 Nm and above areinstalled with torque switches for over-load protection (only basic type)
Electronic Remote Controls
Internal drive to reverse the actuator rotation direction via remote control signals with internal 24 V DC or external 24 V DC/AC up to 120 V DC/AC power supply. As default, remote controls are configured as "3-wires" (1 signal to open and 1 signal to close); remote controls can be configured as "2-wires" (signal present to open, signal absent to close).
VISIUAL POSITION INDICATOR
The visual position indicator is directly mounted onto the center drive column to provide the visual position of the valve.
POTENTIOMETER - optional
Is available on request, is to provide & transmit remote indication of valve position.
MOUNTING & ADAPTATION
Bottom flange mounting dimension conform to ISO 5211. A adaptor drive bushing is provided for every electric actuator, is removable and for
machining to suite valve stem size.
General Applications
The QT model is available in five sizes and is designed for on
/off or modulating control of butterfly, ball, rotary plug valves or dampers in a wide range of heavy industrial, chemical and petrochemical plants on and offshore.
Technical Data
Features
- Low or high voltage single phase DC or AC power supply with 3-phase option
- Multiple adjustable stroking times to suit specific applications
- Interchangeable base plate and range of shaft inserts enable simple connection to any valve type
- Intelligent control unit prevents overheating
- Epicyclical gearing ensures reliable and smooth operation
- Top-mounted position indicator
Power supply:
Voltage fluctuations: Frequency:
Torque output:
Single phase from 24 to 48 V DC or AC at 50/60 Hz Single phase from 100 to
240 V DC or AC at 50/60 Hz
3-phase from 208 - 240 V AC, 380 - 480 V AC and
500 - 575 V AC
+/-10%
+/- 5%
From 60 Nm to 2500 Nm
- Constantly-engaged, hand wheel-operated manual override in case of power failure
- Non-intrusive configuration, operation and diagno stics (only on intellgence model)
- Local control panel for manual valve operation with additional
LCD sreen indicators (Not available on basic model)
- Simple upgrade options for modulating control and network
Ambient temperature Standard range:
Low temp range: Conduit entry:
-25 °C to +70 °C /
-13 °F to 158 °F
-40 °C to +70 °C /
-40 °F to 158 °F NPT 3/4 x 2
Approvals
Waterproof:
Explosionproof:
IP 67
EX DII CT4 (EX model)
Optional Modules and Performance
Optional modules
Starter Module (Code: E)
Available for the pulse passive dry contact point for on / off from DCS
Analog position OUTPUT 4-20 mA or 0-10 V DC 4 additional SPST output contacts
Additional LCD screen and two magnetic knobs for on/off and locol/stop/remote switch as locol interface
Electronic limit swtich and torque
switch
Modalating Module (Code: EZ)
Analog position INPUT 4-20 mA or 0-10 V DC Analog position OUTPUT 4-20 mA or 0-10 V DC 4 additional SPST output contacts
Additional LCD screen and two magnetic knobs for on/off and locol/stop/remote switch as locol interface
Electronic limit swtich and torque
switch
Explosion-proof Model(Code: B)
Have EX.DII CT4 explosion-proof level
Intelligence Module (Code: I)
Available both for the pulse passive dry contact signal and 4-20 mA modlating signal from DCS
Analog position OUTPUT 4-20 mA or 0-10 V DC 4 additional SPST output contacts
Additional LCD screen and two magnetic knobs for on/off and locol/stop/remote switch as locol interface
Non-intrusive configuration, operation Electronic limit swtich and torque switch
Output Drive Dimensions
The QT series is designed for mounting to either an ISO5211 flange or a Keystone flange. Depending on what valve
flange scheme is in play, the black mounting plate and drive insert at the bottom of the actuator can be easily swapped out for this purpose.
Nearly every ISO and Keystone mounting size available on the actuator comes with dual-drilled bolt circles. Besides allowing the actuator to cover a wider range of valve sizes, this feature can potentially prevent the need to install
an adaption bracket between the valve flange and the actuator flange.
Audited Supplier 
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