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| PRODUCTS | |
| ELECTRICAL ACTUATORS | |
| Emtork Actuators | |
| Regeltek Actuators | |
| QT (Quarter Turn Actuators) | |
| Electrical Thrusters | |
| Accessories | |
| MOTORIZED VALVES | |
| DAMPERS | |
| GEARBOXES | |
| Multiturn | |
| Quarterturn | |
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The various Types of electrical Actuators from Marsh have been developed specially for the quarter turn operation of small size Butterfly, Ball, Plug valves and dampers. Thanks to their design simplicity to achieve low-cost automation. They are provided with single phase motors which considerably saves the cost of electrical hardware and other accessories.
Also as the actuators are installed directly on final control element and are provided with stall-duty motors, the units become completely maintenance free, that is Fit and Forget type. The units are supplied with all necessary features to operate the final control element in ON/OFF or modulating modes.
Technical Specifications
| Actuator Data | Actuator Models | ||||||
| QT-3 | QT-5 | QT-10 | QT-20 | QT-30 | QT-40 | QT-50 | |
| Rated Output Torque Kgm | 3 | 5 | 10 | 20 | 30 | 40 | 50 |
| Operating Speed Sec /90° | 17 | 17 | 20 | 20 | 26 | 26 | 26 |
| Switching Frequency Operations / Hour a) Short Time b) Normal |
1200 600 |
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| Weight Kg. | 14 | 15 | 27 | 28 | 38 | 40 | 42 |
| Degree of Protection | IP65/IP67 | ||||||
| Area of Operation | Safe | ||||||
| Motor Data | |||||||
| Type | Non-Blocking A. C. Motor | ||||||
| Supply : Standard Optional |
220V AC 50Hz Single Phase 110 V AC 50Hz Single Phase |
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| Output wattes | 90 | 125 | 175 | 250 | 290 | 300 | 320 |
| Nominal Current Amp | 0.5 | 0.55 | 0.9 | 1.2 | 1.3 | 1.4 | 1.5 |
| Class Insulation | F | ||||||
| Ambient Temperature | 45° C | ||||||
Actuator Dimention Details
| Actuator Model |
Dimensions | Mounting Holes 4H M6 x12 Deep on 50 PCD Off Centre. 4H M8 x12 Deep on 70 PCD Off Centre. |
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| E | F | øG | øH | øJ | K | L | M | N | P | Q | R | øS | ||
| QT-3 | 32 | 170 | 108 | 30 | 100 | 70 | 235 | 70 | 220 | 33 | 140 | 22 | 100 | |
| QT-5 | 32 | 170 | 108 | 30 | 100 | 70 | 255 | 70 | 220 | 33 | 140 | 22 | 100 | |
| QT-10 | 37 | 245 | 108 | 30 | 100 | 93 | 380 | 63 | 240 | 33 | 186 | 17 | 125 | 4H M8 x15 Deep on 70 PCD Off Centre. 4H M10 x15 Deep on 102 PCD Off Centre. |
| QT-20 | 37 | 245 | 108 | 30 | 100 | 93 | 400 | 63 | 240 | 33 | 186 | 17 | 125 | |
| QT-30 | 57 | 235 | 108 | 30 | 100 | 120 | 480 | 122.5 | 275 | 33 | 290 | 0 | 125 | |
| QT-40 | 57 | 235 | 108 | 30 | 100 | 120 | 490 | 122.5 | 275 | 33 | 290 | 0 | 125 | |
| QT-50 | 57 | 235 | 108 | 30 | 100 | 120 | 500 | 122.5 | 275 | 33 | 290 | 0 | 125 | |
Accessories
STANDARD
- Limit Switches (1No.+1Nc) - 2 Nos. (Rating 10 A - 250 VAC)
- Hand wheel
- Local position indicator
- Adjustable mechanical stoppers
OPTIONAL
- Auxillary limit switches - (1No + 1Nc) - 4 Nos.
- Torque limit switches (1No + 1Nc) - 2 Nos (for QT10 onwards)
- Three position switch for ON/OFF operation Field/Panel mounted
- Feed back Potentiometer
- Valve positioner - Field / Panel mounted Input : 4-20mA/0-10 V DC.
Output : Proportional - Two wire transmitter field /Panel mounted
Input : From potentiometer in actuator - 100 to 235 ohms or 0-1000 ohms
Output : 4-20 mA - Two wire - IP 67 Protection
- Remote position indicator-Digital
- Space heater
- Special accessories on request
Connection Digram
