ALW180K-ALW350K
ALW180K-ALW350K Valve Gearbox Series
ALW180K-ALW350K is organized as one product page group from source sheet ALW-31, with actual model variants preserved separately.
ALW180K-ALW350K Valve Gearbox Series
The ALW180K-ALW350K is a heavy-duty quarter-turn worm gearbox for large valves. It provides manual valve gearbox operation with high torque transmission. Designed for large diameter butterfly, ball, plug valves, and dampers.
The ALW180K-ALW350K series is a heavy-duty quarter-turn worm gearbox designed for high torque transmission in large industrial valves. It includes a worm gear transmission providing self-locking function for valve position holding. The gearbox includes an ISO 5211 valve gearbox interface for direct actuator mounting. Compatible with large diameter butterfly, ball, plug valves, and dampers, it supports manual valve operation and electric-ready actuator integration.
Performance Parameters
Units: torque N·m · thrust kN · linear dimensions mm
| Model | Out. Tq. | In. Tq. | Ratio | Eff. |
|---|---|---|---|---|
| ALW180K | 180000 | 118 | 7290:1 | 1525.4 |
| ALW230K | 230000 | 137 | 8010:1 | 1679 |
| ALW270K | 270000 | 150 | 8505:1 | 1800 |
| ALW350K | 350000 | 192 | 9112.5:1 | 1822.5 |
Connection Dimensions
Unit: mm
| Model | Flange No. | D | D0 | PCD Thread | Max. Stem Dia. d | H2 | Convex (D1×f) |
|---|---|---|---|---|---|---|---|
| ALW180K | F40/F48/F60 | 686/686/686 | 406/483/603 | 8×M36-54 / 12×M36-54 / 20×M36-54 | 215/215/220 | 288/288/315 | 300×8 / 370×8 / 470×8 |
| ALW230K | F40/F48/F60 | 686/686/686 | 406/483/603 | 8×M36-54 / 12×M36-54 / 20×M36-54 | 220/230/230 | 315/335/335 | 300×8 / 370×8 / 470×8 |
| ALW270K | F48/F60 | 686/686 | 483/603 | 12×M36-54 / 20×M36-54 | 240 | 372 | 370×8 / 470×8 |
| ALW350K | F48/F60 | 686/686 | 483/603 | 12×M36-54 / 20×M36-54 | 310 | 395 | 370×8 / 470×8 |
Overall Dimensions
Unit: mm · Weight: kg
| Model | A | B | C | L | H | H1 | H3 | ØM | G | L2 |
|---|---|---|---|---|---|---|---|---|---|---|
| ALW180K | 730 | 968.0 | 863 | 1345.0 | 373.0 | 162 | 392.0 | 900 | / | 955 |
| ALW230K | 810 | 1058.0 | 953 | 1370.0 | 423.0 | 162 | 392.0 | 900 | / | 965 |
| ALW270K | 960 | 1205.0 | 1100 | 1515.0 | 495.0 | 192 | 422.0 | 900 | / | 1035 |
| ALW350K | 1040 | 1275.0 | 1170 | 1595.0 | 525.0 | 192 | 422.0 | 900 | / | 1075 |
Dimensional Drawing
Product Structure View
Engineering Material List
| No. | Part Name | Material | UK Standard | USA Standard |
|---|---|---|---|---|
| 1 | Worm Gearcase | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 2 | Alloy Bushing | SF-1 | SF-1 | SF-1 |
| 3 | Thrust Bearing | Steel | BS 535A99 | AISI/SAE 52100 |
| 4 | Worm Shaft | Steel | BS 080A47 | AISI/SAE 1045 |
| 5 | Worm | Steel | BS 970 530M40 | AISI/SAE 5140 |
| 6 | End Cap | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 7 | Turbine | Ductile Iron | BS 2789 600/3 | ASTM A536 80-55-06 |
| 8 | Cover | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 9 | Position Indicator Gasket | Nitrile rubber | Nitrile rubber | Nitrile rubber |
| 10 | Position Indicator | Steel | BS 080A25 | AISI/SAE 1025 |
| 11 | Handwheel | Steel | BS 080A25 | AISI/SAE 1025 |
| 12 | Lock Plate | Steel | BS 080A25 | AISI/SAE 1025 |
| 13 | Lock Latch | Steel | BS 080A25 | AISI/SAE 1025 |
| 14 | Reducer Gear Case Cover | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 15 | Gear | Steel | BS 970 530M40 | AISI/SAE 5140 |
| 16 | Reducer Main Shaft Gear | Steel | BS 970 530M40 | AISI/SAE 5140 |
| 17 | Reducer Gearcase | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
Compatibility & Actuator Interface
Structured gearbox data for engineering selection and project documentation.
TFC provides engineered gearbox solutions for demanding valve applications, with technical support for model selection, torque matching, project documentation and OEM requirements.
Frequently Asked Questions
What is the torque range of the ALW180K-ALW350K gearbox?
The gearbox supports torque output from 180,000 to 350,000 Nm.
What type of gear transmission does this valve gearbox use?
It uses a worm gear transmission with self-locking to hold valve position.
Does this gearbox support ISO 5211 valve gearbox interface?
The gearbox includes an ISO 5211 flange for actuator mounting.
Which valve types are compatible with this quarter turn gearbox?
It is designed for quarter-turn operation of butterfly, ball, plug valves, and dampers.
Can this gearbox be used for manual and electric valve operation?
Yes, it is suitable for manual operation and can be adapted for electric actuators.
Need engineering assistance?
Send us your valve type, required torque, stem dimensions, flange standard and working conditions. Our engineering team will recommend a suitable gearbox model.