GLW4500-GLW5500
GLW4500-GLW5500 Quarter-turn Manual Worm Gearbox Series
GLW4500-GLW5500 is organized as one product page group from source sheet GLW-04, with actual model variants preserved separately.
GLW4500-GLW5500 Quarter-turn Manual Worm Gearbox Series
GLW4500-GLW5500 is a manual quarter-turn worm gearbox. It delivers torque for valve automation. Features ISO 5211 manual valve gearbox interface.
The GLW4500-GLW5500 series is a manual worm gearbox designed for quarter-turn valve operation. It transmits torque through a worm gear transmission, providing output torque from 4500 to 5500 Nm. The gearbox features an ISO 5211 interface for direct mounting on butterfly, ball, plug valves, and dampers. Its worm gear design offers a self-locking function, ensuring secure valve positioning.
Performance Parameters
Units: torque N·m · thrust kN · linear dimensions mm
| Model | Out. Tq. | In. Tq. | Ratio | Eff. |
|---|---|---|---|---|
| GLW4500 | 4500 | 110 | 159:1 | 41.3 |
| GLW5500 | 5500 | 128 | 165:1 | 42.9 |
Connection Dimensions
Unit: mm
| Model | Flange No. | D | D0 | PCD Thread | Boss D | Pin Qty | f | Max. Stem Dia. d | H2 | HW Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| GLW4500 | F16/F20/F25 | 210/300/300 | 165/205/254 | 4×M20-30/8×M16-24/8×M16-24 | 130/140/200 | 2-Φ16/4-Φ16/4-Φ16 | 5/5/5 | 70 | 100 | 600 |
| GLW5500 | F16/F20/F25 | 210/260/300 | 165/205/254 | 4×M20-30/8×M16-24/8×M16-24 | 130/140/200 | 2-Φ16/4-Φ16/4-Φ16 | 5/5/5 | 80 | 110 | 600 |
Overall Dimensions
Unit: mm · Weight: kg
| Model | A | B | C | L | L1 | H | H1 | H3 | L2 | H4 | E | K |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLW4500 | 220/300/300 | 247/287/287 | 234/234/234 | 339/379/379 | 24/24/24 | 121/121/121 | 63/63/63 | 148.5/148.5/148.5 | 229/229/229 | 55/55/55 | 20/20/20 | 6/6/6 |
| GLW5500 | 260/300/300 | 326.5/346.5/346.5 | 277/277/277 | 380/400/400 | 24/24/24 | 140/140/140 | 63/63/63 | 153.5/153.5/153.5 | 249/249/249 | 55/55/55 | 20/20/20 | 6/6/6 |
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 GLW4500-GLW5500 gearbox?
The GLW4500-GLW5500 supports torque output from 4500 to 5500 Nm.
Does the gearbox have an ISO 5211 mounting interface?
It uses an ISO 5211 flange interface for direct valve mounting.
Which valve types are compatible with this manual worm gearbox?
Yes, it is designed for quarter-turn valves including butterfly and ball valves.
Does the gearbox provide a self-locking feature?
The worm gear transmission provides a self-locking function for secure valve positioning.
Is the GLW4500-GLW5500 suitable for electric-ready valve automation?
The gearbox supports manual operation and can be adapted for electric actuator mounting.
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.