GLW075K-GLW250K
GLW075K-GLW250K Quarter-turn Manual Worm Gearbox Series
GLW075K-GLW250K is organized as one product page group from source sheet GLW-10, with actual model variants preserved separately.
GLW075K-GLW250K Quarter-turn Manual Worm Gearbox Series
GLW075K-GLW250K is a manual worm gearbox for large diameter butterfly valves. It delivers high torque for quarter-turn valve operation. The gearbox features an ISO 5211 flange for valve gearbox interface and supports heavy duty valve operation.
The GLW075K-GLW250K series is a manual worm gearbox designed for quarter-turn valve operation. It transmits high output torque ranging from 75,000 to 250,000 Nm through a worm gear transmission. The gearbox features an ISO 5211 valve gearbox interface for direct actuator mounting. Compatible with large diameter butterfly valves, ball valves, plug valves, and dampers, it supports valve position holding via a self-locking function.
Performance Parameters
Units: torque N·m · thrust kN · linear dimensions mm
| Model | Out. Tq. | In. Tq. | Ratio | Eff. |
|---|---|---|---|---|
| GLW075K | 75000 | 98 | 3326:1 | 765 |
| GLW090K | 90000 | 110 | 3955:1 | 825 |
| GLW120K | 120000 | 112 | 4998:1 | 1078 |
| GLW150K | 150000 | 115 | 5716:1 | 1309 |
| GLW200K | 200000 | 145 | 6300:1 | 1379 |
| GLW250K | 250000 | 177 | 6583:1 | 1412 |
Connection Dimensions
Unit: mm
| Model | Flange No. | D | D0 | PCD Thread | Boss D | Pin Qty | f | Max. Stem Dia. d | H2 | HW Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| GLW075K | F35/F40/F48 | 560/560/560 | 356/406/483 | 8×M30-45/8×M36-54/12×M36-54 | 260/300/370 | 4-Φ30/4-Φ40/4-Φ40 | 5/8/8 | 185 | 248 | 600 |
| GLW090K | F35/F40/F48 | 560/560/560 | 356/406/483 | 8×M30-45/8×M36-54/12×M36-54 | 260/300/370 | 4-Φ30/4-Φ40/4-Φ40 | 5/8/8 | 190 | 258 | 900 |
| GLW120K | F40/F48/F60 | 686/686/686 | 406/483/603 | 8×M36-54/12×M36-54/20×M36-54 | 300/370/470 | 4-Φ40/4-Φ40/4-Φ40 | 8/8/8 | 200 | 284 | 900 |
| GLW150K | F40/F48/F60 | 686/686/686 | 406/483/603 | 8×M36-54/12×M36-54/20×M36-54 | 300/370/470 | 4-Φ40/4-Φ40/4-Φ40 | 8/8/8 | 200 | 284 | 1000 |
| GLW200K | F40/F48/F60 | 686/686/686 | 406/483/603 | 8×M36-54/12×M36-54/20×M36-54 | 300/370/470 | 4-Φ40/4-Φ40/4-Φ40 | 8/8/8 | 220 | 350 | 1000 |
| GLW250K | F40/F48/F60 | 686/686/686 | 406/483/603 | 8×M36-54/12×M36-54/20×M36-54 | 300/370/470 | 4-Φ40/4-Φ40/4-Φ40 | 8/8/8 | 240 | 400 | 1000 |
Overall Dimensions
Unit: mm · Weight: kg
| Model | A | B | C | L | L1 | H | H1 | H3 | G | L2 | H4 | E | K |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLW075K | 415/475/590 | 672/702/759.5 | 600/600/600 | 850.5/880.5/938 | 24/24/24 | 321/321/321 | 140/140/140 | 297.5/297.5/297.5 | 120/120/120 | 643/643/643 | 140/140/140 | 20/20/20 | 6/6/6 |
| GLW090K | 415/475/630 | 686/716/793.5 | 625/625/625 | 865.5/895.5/973 | 24/24/24 | 321/321/321 | 140/140/140 | 297.5/297.5/297.5 | 120/120/120 | 658/658/658 | 140/140/140 | 20/20/20 | 6/6/6 |
| GLW120K | 475/560/686 | 735/777.5/840.5 | 680/680/680 | 925.5/968/1031 | 24/24/24 | 340/340/340 | 150/150/150 | 307.5/307.5/307.5 | 120/120/120 | 688/688/688 | 140/140/140 | 20/20/20 | 6/6/6 |
| GLW150K | 475/560/686 | 735/777.5/840.5 | 680/680/680 | 925.5/968/1093 | 24/24/24 | 340/340/340 | 150/150/150 | 307.5/307.5/307.5 | 120/120/120 | 750/750/750 | 140/140/140 | 20/20/20 | 6/6/6 |
| GLW200K | 475/560/686 | 735/777.5/840.5 | 680/680/680 | 925.5/968/1093 | 24/24/24 | 340/340/340 | 150/150/150 | 307.5/307.5/307.5 | 120/120/120 | 750/750/750 | 140/140/140 | 20/20/20 | 6/6/6 |
| GLW250K | 475/560/686 | 735/777.5/840.5 | 680/680/680 | 925.5/968/1093 | 24/24/24 | 340/340/340 | 150/150/150 | 307.5/307.5/307.5 | 120/120/120 | 750/750/750 | 140/140/140 | 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 output torque range of the GLW075K-GLW250K gearbox?
The torque range is 75,000 to 250,000 Nm for the GLW075K-GLW250K series.
What type of gear transmission does this valve gearbox use?
It uses a worm gear transmission with a self-locking function for position holding.
Does this gearbox support ISO 5211 valve gearbox interface mounting?
The gearbox includes an ISO 5211 flange for direct valve and actuator mounting.
Which valve types are compatible with this quarter turn gearbox?
It is suitable for quarter-turn valves including butterfly, ball, plug valves, and dampers.
Is the GLW075K-GLW250K gearbox compatible with electric actuators?
Manual operation is standard; electric-ready versions can be integrated separately.
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.