Emtork Multiturn Actuators

Applications

The "Emtork" Electric Actuators are electromechanical units used for operating the final control elements like valves or dampers to control the flow of fluids flowing thru the pipes or ducts. The specific advantages of using these units are :

  • Ease of operation.
  • Remote control facility.
  • Proportional action of final control element in close loop system.
  • Attaining & holding the desired preset position of the valve/damper.
  • Various indications & alarms are available on the remote control panel & also on the unit.
  • Emergency manual operation possible in case of power failure.
  • Works on most convenient & easily available source of energy i.e. electricity.
  • Models available to cover wide range of valves & dampers.
  • Units with Integral starter will save cost of cables.
  • Units with Electronic controller will facilitate field programming.

Design

  • The Basic design of the Emtork Actuator consists of an electric motor, reduction gear unit and control compartment.
  • Various models have been developed to suit operating torque, speed, process parameters, area of operation etc.
  • Additional supplementary spur and worm gear boxes are offered to get higher operating torques and quarter turn motion.
  • Linear motion actuators have been developed to impart the required thrust to operate globe valves.
  • The models are available for on / off and regulating duly and also for hazardous area application.

Modes, Types & Models of Emtork Actuators
Modes
Types
Models
On/Off-Isolating
Modulating/ Regulating
Safe Area
Flame/Explosion Proof
Multiturn M30, M60, M80, M120, M150, M200, M250, M300, M500, M600, M1000 Also with supplementary spur gear boxes.
Quarterturn QM0, QM1, Rotary actuator with supplementary
worm gear boxes Also TM0/WG & TM1/WG
Linear LM0,LM1 & Rotary actuator with 
attachment for linear motion
Features of Emtork Actuators
Standard Features

  • Electric motor TEFC, 3ph, S-1 Duty
  • Insulation class 'F'
  • Travel limit switches -2 Nos (1NO + 1 NC)
  • Torque limit switches -2 Nos(l NO + 1 NC)
  • Continuous type local position indicator
  • Handwheel with clutch mechanism
  • Protection class IP 65
  • Various types of output couplings viz A/B/C/D/E as per DIN 3210
  • Hammer-blow effect

Optional Features

  • Electric motor- TESC,3ph,S2 OR S4 Duty
  • Better class of insulation for motor
  • Travel limit switches 2 NO+2 NC in place of 1 NO+1 NC-2 Nos
  • Torque limit switch 2 NO + 2 NC in place of 1NO+1NC-2Nos
  • Additional Travel limit switches (1 NO + 1 NC) - 4Nos(Extra) –or (2 No. + 2 NC - 2 Nos. extra)
  • Feed back potentiometer
  • Remote position indicators-Analogue / Digital / Bar graph
  • Space heater
  • Electromagnetic, Electronic brake for the motor
  • Protection class IP67/IP68
  • Various types of local & remote panels
  • Foot mounting brackets
  • Set of linkages
  • Tailor made accessories to suit customer's specific requirements
  • Thermostats in motor winding
  • Field / Panel mounted source to Convert 220VACto 24 VDC required for transmitter
  • Supplementary Spur Worm gear boxes
  • Attachment for linear motion
  • Retrofitting

Detail features of Actuators
Drive Motor:

Emtork actuators are equipped with three phase, squirrel cage induction motor having high starting torque. These motors comply with IS-325 specifications.


Supply condition 415 VAC, 3ph / 380VAC,3ph / 2 20 VAC,1ph
Enclosure TEFC/ TESC
Class of insulation std.'F'
Class of protection IP55 / 65/67/68
Duty S1 / S2 / S4
Ambient temp 50° c

Travel limit switches:

These switches are provided to cut off the actuator supply at the end of the preset travel in either direction. These switches are operated by cams which can be reset at site. Additional travel switches can be provided to get feed back of various valve positions

Torque limit switches:

These switches are provided to cut off the actuator the torque developed in the system is more than the desired preset value, in either direction. Torque switch in closing direction can also be set to achieve leak-proof / tight shut off of the valve.

Local indicator:

A continuous type mechanical local position indicator is provided on the actuator to show the actual mechanical position of the final control element.

Handwheel with motor overriding feature:

Emtork actuator is provided with a handwheel for emergency manual operation. The selector fork lever when put on to 'hand-position', disconnects the motor drive and connects to hand wheel drive so that desired operation can be done by hand wheel. When the motor is switched on, the hand wheel connection gets disengaged automatically and the operation is carried out by electric power.

Weather protection:

The emtork actuators are supplied with IP65/IP67/IP68 class of protection as per IS-4691 & IS-2147 duly certified by concerned authorities. The ingrace of dust and water is prevented to protect the inside mechanism.

Output shaft designs:

The basic rotary actuators are supplied A,B,C,D,E as per DIN 3210.

Hammer blow effect:

An inbuilt feature of the ‘emtork’ actuator and is achieved thru “lost motion principle” and by using higher starting torque motor.

Feed back potentiometer / transmitter:

A feed back signal, in terms of change in resistance or current proportional to the valve position, is available thru potentiometer or transmitter. A non- contact LVDT type transmitter can also be provided.

Remote indicators:

The signal coming from potentiometer is converted thru stabilized power source and read by analogue/digital on remote panel

Space heater:

An anti-condensation heater can be provided in the switching compartment while using the actuator in humid/damp environment.

Brake:

Electromagnetic or electronic brake can be provided for the motor to stop the actuator instantly

Control panels:

Various types of control panels can be provided for local, remote and combined local plus remote operations of the actuator.

Positioner:

Panel or field mounted electronic positioner can be supplied which can accept a control command of 4-20mA and position the final control element accordingly, 4-20 mA feed back signal is also available from the positioner.

Integral panel – electrical hardware logic

A reversing starter consisting of push buttons, indicating lamps, contactors, O/L relay etc. can be supplied as an integral part of the actuator. This will save a major cost of cabling. A parallel operation & monitoring from remote station is also possible. A field mounted valve positioner unit can also be supplied in the integral panel.

Integral panel - electronic PCB logic

Field programming thru electronic logic is possible by this integral panel. In addition to the electrical hardware various PCBs are provided to select the parameters such as inching / noninching operation, closing by torque switch etc. Parallel functions from remote station are also possible.

Blinker transmitter:

An actuator mounted transmitter can be supplied which will indicate that the actuator is in running condition, thru a blinking lamp on control panel.

Foot mounting brackets & set of linkages:

These items can be supplied to suit various site conditions so that the final control element can be operated from a distant location.

Thermostats in motor:

These are embedded in the motor winding so as to protect the motor from burning due to overheating of motor winding.

Source:

A field / panel mounted source can be supplied for converting 220 VAC to 12/24/36 VDC, supply which is normally required to energize a two wire transmitter.

Supplementary spur gear boxes:

To increase the output torque of rotary actuators various types of spur gear boxes can be supplied. These gear boxes have variety of reduction ratios & output couplings viz A/B/C/D/E as per DIN 3210.

Supplementary worm gear boxes:

Worm gear boxes can be supplied to convert the output motion of rotary actuator in to quarter-turn movement to suit the operations of butterfly, ball & plug valves. Various models are available with different reduction ratios. Out put coupling for these models will be normally ‘E’ for direct mounting & ‘D’ for mounting thru brackets & linkages.

Linear attachment:

To convert rotary motion into linear to suit globe valves, a linear attachment is provided for the actuator. Various thrust values are available to suit the applications.

Retrofitting:

To convert the existing manually operated valves into “motor-operated”, retrofitting services are offered; which includes, site study, selection of equipment, spot measurement, designing & manufacturing mounting brackets, couplers, cabling etc. and installation and commissioning of equipment on turnkey basis. This will also cover the services of compating / synchronizing the system with control parameters of other instruments.

Ordering Specifications
I) BASIC MODELS WITH SUPPLEMENTARY SPUR, QUARTER TURN WORM AND FULL TURN WORM GEAR BOXES


IV) Flame / Explosion Proof Actuators:

- Add the prefix 'F' to all the above model specifications when ordering for Flame / Explosion proof units.

Example : FM1 / 010 / SG00 / WG030 / E.

Torque Switch Arrangement
Travel Switch Arrangement
Technical Specifications of basic actuator models
Model Output Data   Motor Data  
  Output Speed
RPM (Aprox.)
Output Torque Nm Actuator 
Self 
Locking
Rated 
Power
HP
No. of
Poles
Rated
Current
AMP
(Aprox.)
Power
Factor
FL
Effi. %
(FL)
Mounting
Base As
per IS
9334
Rated Adj Range
M30 10,15,20
30,40
65,90
120,150
30 10-30 Yes
Yes
Yes
No
0.16
0.25
0.35
0.50
4
2
2
2
0.42
0.57
0.71
1.00
0.75
0.76
0.79
0.78
53
58
62
67
F10
M60 10,15,20
30,40
65,90
120,150
60 20-60 Yes
Yes
Yes
No
0.16
0.25
0.50
1.00
4
2
2
2
0.42
0.57
1.00
1.70
0.75
0.76
0.78
0.82
53
58
67
75
F10
M80
(M0)
1O to 70
80 to 140
190 to 365
80 25-80 Yes
Yes
No
1.00
3.00
3.00
4
2
2
1.80
4.55
4.55
0.78
0.83
0.83
76
81
81
F10
M120 10,15,20
30,40
65,90
120,150
120 40-120 Yes
Yes
Yes
No
0.25
0.50
1.00
1.50
4
2
2
2
0.58
1.00
1.70
2.40
0.75
0,78
0.82
0.82
58
67
75
79
F10
M150 10,15,20
30,40
65,90
120,155
150 50-150 Yes
Yes
Yes
No
0.35
0.75
1.50
2.00
4
2
2
2
0.77
1.33
2.40
3.10
0.74
0.79
0,82
0.86
61
73
79
78
F10
M200
(M1)
10 to30
40 to 60
80 to 120
200 60-200 Yes
No
No
1.00
2.00
3.00
4
4
2
1.80
3.30
4.55
0.78
0.80
0.83
76
78
81
F14
M250 10,15,20
30,40
65,90
120,150
250 80-250 Yes
Yes
Yes
No
0.50
1.00
2.00
3.00
4
2
2
2
1.04
1.70
3.10
4.55
0.72
0.82
0.86
0.83
69
75
78
81
F14
M300 10,15,20
30,40
65,90
120,150
300 100-300 Yes
Yes
Yes
No
0.75
1.50
3.00
5.00
4
2
2
2
1.40
2.40
4.55
7.20
0.78
0.82
0.83
0.87
72
79
81
82
F14
M500 10,15,20
30,40
65,90
120,150
500 160-500 Yes
Yes
Yes
No
1.00
2.00
5.00
7.50
4
2
2
2
1.80
3.10
7.20
10.20
0.78
0.86
0.87
0.89
76
78
82
84
F14
M600 10,15,20
30,40
65,90
120,150
600 200-600 Yes
Yes
Yes
No
1.50
3.00
5.00
7.50
4
2
2
2
2.50
4.55
7.20
10.20
0.81
0.83
0.87
0.89
76
81
82
84
F14
M1000 10,15,20,
30,40,60,
80,
120
1000 300-1000 Yes
Yes
Yes
No
1.5
3
5
10
6
4
2
2
2.9
4.6
7.2
14
0.69
0.82
0.87
0.88
76
81
82
85
F16
  • At higher speeds the rated output torque may get reduced slightly.
  • For regulating Duty models the output speed of the actuator should be restricted up-to 40RPM to avoid inertia problems.
  • Additional details for regulating duty models will be available on request.