ALEW0800-ALEW7500
ALEW0800-ALEW7500 Valve Gearbox Series
ALEW0800-ALEW7500 is organized as one product page group from source sheet ALEW-33, with actual model variants preserved separately.
ALEW0800-ALEW7500 Valve Gearbox Series
ALEW0800-ALEW7500 is a manual quarter-turn worm gearbox for valve shaft operation. It provides torque transmission for butterfly, ball, and plug valves. Includes ISO 5211 manual valve gearbox interface for direct mounting.
The ALEW0800-ALEW7500 quarter-turn worm gearbox transmits manual input torque to valve shafts. It includes a worm gear transmission with self-locking function. The gearbox includes an ISO 5211 interface flange for direct mounting on butterfly, ball, plug valves, and dampers. It supports quarter-turn operation with torque outputs from 800 to 7500 Nm.
Performance Parameters
Units: torque N·m · thrust kN · linear dimensions mm
| Model | Out. Tq. | In. Tq. | Ratio | Eff. |
|---|---|---|---|---|
| ALEW0800 | 800 | 48 | 48:1 | 16.8 |
| ALEW1200 | 1200 | 80 | 48:1 | 16.8 |
| ALEW3000 | 3000 | 150 | 56:1 | 19.6 |
| ALEW4500 | 4500 | 250 | 53:1 | 18.55 |
| ALEW7500 | 7500 | 400 | 55:1 | 19.25 |
Connection Dimensions
Unit: mm
| Model | Flange No. | D | D0 | PCD Thread | Boss D | Pin Qty | f | Max. Stem Dia. d | H2 |
|---|---|---|---|---|---|---|---|---|---|
| ALEW0800 | F10/F12 | 150/150 | 102/125 | 4×M10-15/4×M12-18 | 70/85 | 2-Φ10/2-Φ10 | 3/3 | 40 | 75 |
| ALEW1200 | F12/F14 | 175/175 | 125/140 | 4×M12-18/4×M16-24 | 70/85 | 2-Φ10/2-Φ12 | 3/4 | 45 | 90 |
| ALEW3000 | F14/F16 | 210/210 | 140/165 | 4×M16-24/4×M20-30 | 100/130 | 2-Φ12/2-Φ16 | 4/5 | 65 | 103 |
| ALEW4500 | F16/F20 | 250/250 | 165/205 | 4×M20-30/8×M16-24 | 130/140 | 2-Φ16/4-Φ16 | 5/5 | 70 | 123 |
| ALEW7500 | F20/F25 | 300/300 | 205/254 | 8×M16-24/8×M16-24 | 140/200 | 4-Φ16/4-Φ16 | 5/5 | 80 | 120 |
Overall Dimensions
Unit: mm · Weight: kg
| Model | A | B | C | L1 | H | H1 |
|---|---|---|---|---|---|---|
| ALEW0800 | 125 | 199.0 | 64 | 180.0 | 115 | 42.5 |
| ALEW1200 | 175 | 228.0 | 78 | 231.0 | 109.5 | 47 |
| ALEW3000 | 210 | 298.5 | 106 | 275.0 | 142.5 | 55 |
| ALEW4500 | 250 | 333.0 | 121 | 335.0 | 145.5 | 58 |
| ALEW7500 | 300 | 377.5 | 140 | 360.0 | 145.5 | 58 |
Dimensional Drawing
Product Structure View
Engineering Material List
Housing: ASTM A536 65-45-12, Worm Shaft: AISI 5140, Worm Wheel: ASTM A536 80-60-03
| 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 | Actuator mounting bracket | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 5 | Turbine | Ductile Iron | BS 2789 600/3 | ASTM A536 80-55-06 |
| 6 | Cover | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 7 | Position Indicator Gasket | Nitrile rubber | Nitrile rubber | Nitrile rubber |
| 8 | Position Indicator | Steel | BS 080A25 | AISI/SAE 1025 |
| 9 | End Cap | Ductile Iron | BS 2789 450/10 | ASTM A536 65-45-12 |
| 10 | Worm Shaft | Steel | BS 080A47 | AISI/SAE 1045 |
| 11 | Worm | Steel | BS 970 530M40 | AISI/SAE 5140 |
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 type of gear transmission does the ALEW0800-ALEW7500 use?
The gearbox uses a worm gear transmission with self-locking to prevent back-driving.
What is the torque range of this quarter-turn worm gearbox?
Torque range is from 800 to 7500 Nm, suitable for medium to large valves.
Does this gearbox have an ISO 5211 mounting interface?
It includes an ISO 5211 flange interface for direct mounting on valve shafts.
Can the gearbox be used for both manual and electric valve operation?
The gearbox supports manual operation and can be adapted for electric actuators.
Which valve types are compatible with this quarter-turn gearbox?
Compatible with butterfly, ball, plug valves, and industrial dampers.
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.