VMG Series
Manual Gear Operator
Worm gear manual operator for quarter-turn valves. 15 models from 720 Nm to 150,000 Nm output torque with ductile iron housing, IP68 protection, and ISO 5211 mounting.
Technical Specifications
Worm gear operator engineered for reliable manual actuation of quarter-turn valves.
Models
15 Models (VMGS007 – VMGS808)
Output Torque
720 Nm – 150,000 Nm
Housing Material
Ductile Iron (QT450-10)
Gear Ratio
42:1 – 3,525:1
Mounting
ISO 5211 Flange (F10 – F60)
Protection
IP68 Ingress Protection
Rotation
0°–90° (±5° Adjustable)
Temperature
-20°C to +120°C
Why Choose the VMG Series
Wide Torque Coverage
15 models spanning 720 Nm to 150,000 Nm with closely spaced torque increments. The small step between adjacent models ensures precise sizing — avoiding oversized gear operators that waste budget.
Rugged Ductile Iron Construction
QT450-10 ductile iron housing, covers, and worm gear with 1045 carbon steel worm shaft and input shaft. One-way thrust ball bearing supports axial loads for smooth, low-effort handwheel operation.
IP68 Sealed & Field Adjustable
IP68-rated enclosure protects internals in submerged or wash-down environments. Built-in mechanical limit screws allow field adjustment of open/close stops. Position indicator visible from above.
VRS vs. VRS-C - Key Differences
Data Center infrastructure standards and engineering tools.
Data Center Cooling Valves
Precision valves for chilled water, glycol, and CRAC systems with low PUE performance.
Hydrogen-Ready Valves
Series 32 high-pressure ball valves rated to -253°C for cryogenic hydrogen service
Performance Data
Output torque, gear ratio, and ISO 5211 flange compatibility for all 15 models.
| Model | Gear Ratio | Input Torque | Output Torque | Efficiency | ISO 5211 Flange |
|---|---|---|---|---|---|
| VMGS007 | 42:1 | 80 Nm | 720 Nm | 21% | F10 / F12 |
| VMGS008 | 50:1 | 110 Nm | 1,200 Nm | 22% | F12 / F14 / F16 |
| VMGS108 | 72:1 | 130 Nm | 2,000 Nm | 21% | F14 / F16 |
| VMGS158 | 70:1 | 150 Nm | 2,500 Nm | 24% | F12 / F14 / F16 |
| VMGS208 | 68:1 | 210 Nm | 3,300 Nm | 23% | F14 / F16 / F25 |
| VMGS218 | 78:1 | 206 Nm | 4,475 Nm | 28% | F14 / F16 / F25 |
| VMGS238 | 175:1 | 170 Nm | 6,250 Nm | 21% | F16 / F25 |
| VMGS308 | 275:1 | 150 Nm | 9,800 Nm | 24% | F16 / F25 |
| VMGS358 | 532:1 | 170 Nm | 18,000 Nm | 20% | F25 |
| VMGS408 | 700:1 | 190 Nm | 32,000 Nm | 24% | F25 / F30 |
| VMGS448 | 1,233:1 | 165 Nm | 42,000 Nm | 21% | F30 / F35 / F40 |
| VMGS508 | 1,254:1 | 190 Nm | 60,000 Nm | 25% | F35 / F40 |
| VMGS608 | 1,855:1 | 190 Nm | 80,000 Nm | 23% | F35 / F40 |
| VMGS708 | 2,292:1 | 190 Nm | 100,000 Nm | 23% | F40 / F48 |
| VMGS808 | 3,525:1 | 190 Nm | 150,000 Nm | 22% | F48 / F60 |
Where This Solution Works
Large Ball Valves
Manual operation of flanged ball valves from 4″ to 48″ where pneumatic or electric actuators are not required or available.
Butterfly Valves
Quarter-turn operation for high-performance and resilient-seated butterfly valves in water, HVAC, and process systems.
Plug Valves
Reliable manual actuation of sleeved and lubricated plug valves in chemical and petrochemical service.
Oil & Gas Isolation
Handwheel-operated isolation on pipelines, tank farms, and terminals where power sources are unavailable.
Damper Control
Quarter-turn gear operators for industrial dampers in power generation, cement, and HVAC ductwork applications.
Water & Wastewater
IP68-rated gear operators for buried or submerged valve installations in municipal water and sewer infrastructure.
Technical Resources
Engineering tools and documentation for the VMG Series.
Need VMG Gear Operators
For Your Project?
Tell us your valve type, size, and required operating torque. Our engineering team will select the right VMG model and provide dimensional data and mounting details within 24 hours.