Valve actuator
L120 series
Outline
Wide-range for processes
Limitorque valve control
L120 series
The Limitorque L120 series offers multi-turn-type valve actuators equipped with a motor and gear train.
In addition to the robust and highly accurate structures and enhanced control mechanism, the design with superior maintainability guarantees stable operation for a long time. To meet the demands of a wide range of fields, we offer eight unit sizes and protection types, such as waterproof and explosion-proof types.
Application
- – Thermal and hydropower plants, water supply and sewerage systems, petroleum oil, chemical, ship, vessel, and papermaking.
- – L120 actuators can be attached directly to multi-turn-type valves (such as gate valves, glove valves, through gates, and hydraulic gates).
- – They can be attached to part-turn-type valves (such as butterfly valves, plug valves, and dampers) in combination with an actuator for part turn-type valves.
Features
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Robust housing
- – Die-cast aluminum is used for small-sized standard housings, and cast iron is used for large-sized standard housings.
- – The housing with standard specifications is the outdoor type (IP55), but we can also offer water-resistant and explosion-proof types to meet the needs of customers.
- – The O-ring with a large wire diameter maintains high air-tightness over a long period of time.
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Highly-durable gear train
- – The worm gears and worms are made of aluminum bronze and chrome molybdenum steel, respectively. They enable the drive sleeve to have a long life of over 100,000 rotations.
- – Optimum materials are used for the respective gears according to the loads, and extreme pressure grease is filled in the sealed gear case.
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High-performance torque switch
- – It has high-capacity silver contacts with long life.
- – The operating point can be set within the entire torque range in both the opening and closing directions.
The valve is protected from overloads without fail.
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High-precision geared limit switch
- – All units are equipped with a four-position geared limit switch with a rated voltage of 600 V as standard.
- – Four rotors have four contacts, respectively, to detect the four valve positions.
- – The operating point can be set at any position within the entire stroke.
- – The switch rotor is operated by the closed metallic intermittent gear lubricated with grease without fail. The preset position does not shift.
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High-safety electric/manual mode switching operation
- – All models are equipped with the declutch lever as standard. Switching the lever to manual mode position enables manual operation.
- – When the motor rotates, the lever restores automatically, the electric operation mode is turned on, and the hand wheel does not rotate.
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Equipped with the earth terminal/space heater as standard
- – All models are equipped with the earth terminal for responding to highly humid and wet environments, as well as a space heater for stabilizing operation in low-temperature environments as standard. They can be used in a wide variety of fields.
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Enhanced control functions
- – Integral control, consisting of various control devices, is applicable to the control station (control panel) and computerized control.
- – It enables development into a centralized system that networks multiple actuators.
Specifications
| Unit size | L120-10 | L120-20 | L120-40 | L120-85 | L120-190 | L120-420 | L120-800 | L120-2000 | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Mechanism and specifications | Allowable torque N・m | 140 | 270 | 540 | 1100 | 2500 | 5700 | 11000 | 27000 | |
| Allowable thrust kN | 44 | 88 | 130 | 200 | 330 | 620 | 1100 | 2200 | ||
| Maximum system diameter mm | Screw connection Drive 2 |
※32 | ※57 | ※66 | ※83 | ※88 | ※127 | ※127 | ※158 | |
| Key connection ※※Drive 1 |
24 （7×3 ） |
46 （14×3.8 ） |
53 （16×4.3 ） |
70 （20×4.9 ） |
73 （20×4.9 ） |
108 （28×6.4 ） |
180 （45×10.4 ） |
206 （50×11.4 ） |
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| Output shaft rotation frequency min-1 | 60Hz | 12-192 | 12-192 | 12-192 | 12-192 | 12 18-96 120-192 |
12 18-72 84-168 |
12-36 84-192 |
12-30 36-60 |
|
| 50Hz | 12-168 | 12-168 | 12-168 | 12-168 | 12-18 24-84 96-168 |
12-18 24-60 72-168 |
12-60 72-144 |
12-30 36-48 |
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| Reduction rate of manual type | Standard | 1:1 | 1:1 | 1:1 | ※※※ | 40:1 24:1 9:1 |
39:1 28:1 11:1 |
34:1 13:1 |
270:1 164:1 |
|
| Option | 4.2:1 | 5.7:1 | 12:1 | ー | 115:1 69:1 26:1 |
236:1 170:1 67:1 |
202:1 79:1 |
772:1 468:1 |
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| Attachable actuator | BA(Allowable thrust: 26 – 1,200 kN, for multi-turn-type valve) HB(Allowable torque: 0.83 – 200 kN·m, for part-turn-type valve) H(Allowable torque: 390 – 1,100 kN·m, for part-turn-type valve) |
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| Electric and control specifications | Motor | Power supply | AC 200V/400V/50Hz、200V/440V/60Hz(Compatible to 600 V AC and lower) | |||||||
| Starting torque | 500% | |||||||||
| Insulation class | Class F | |||||||||
| Rated time | 15 minutes | |||||||||
| Thermostat | 15 minutes | |||||||||
| Space heater | Supplied | |||||||||
| Thermal protector | Option | |||||||||
| Motor starter | Option | |||||||||
| Trans | ||||||||||
| Push-button switch | ||||||||||
| Indication light | ||||||||||
| Selector switch | ||||||||||
| Position transmitter | ||||||||||
| Modulating control | ||||||||||
| Protection type | Protection structure | IP55,67、NEMA,I,Ⅱ,Ⅳ,Ⅵ | ||||||||
| Explosion-proof | JIS Exdll BT4 FM Class 1 Group B,C,D Division 1,2 FM Class 2 Group E,F,G Division 1,2 CSA Class 1 Group B Division 2 CSA Class 1 Group C,D Division 1,2 CSA Class 2 Group E,G Division 1,2 Cenelec Group 2a,2b T4（BS 5501 PART 5 ） |
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*Represents the screw connection with a thrust base.
**Represents the key connection and the value in parenthesis is the maximum keyway dimension.
***Same as the reduction ratio of the unit.
The L120-85 and higher models are manufactured by Flowserve Corporation in the United States.