MO-RANGE

  • Robust housing made of Ductile Cast iron GGG40/JS1030
  • IP67 enclosure, fully compatible with the ALFA insert system – no surprises in the field
  • Suitable for operating between Double or Single acting Pneumatic or Hydraulic actuators
  • Available in 7 sizes, delivering torque up to 8,500 Nm

 

Manual Override Gearboxes – Control When It Really Matters

The Manual Override range from Alfa Gears is designed to give operators full control when automation is not available — or simply not desired.

Built for reliability and ease of operation, these gearboxes ensure safe and precise manual valve control during power failures, maintenance, or emergency situations. No electronics, no dependency — just proven mechanical performance when you need it most.

Fully compatible with the ALFA insert system, the Manual Override Range integrates seamlessly with automated valve assemblies while keeping manual operation straightforward and dependable.

Because when systems stop, mechanical control must continue.

Alfa Gears Manual Override Range
Always in control. Even when everything else isn’t.

General technical information

Alfa-Series quarter-turn worm gearboxes are applied to ball valves, butterfly valves, dampers and other 90° rotary valves. Alfa Gears hand wheels are with a variety models for optimal operation.
Alfa Gears quarter-turn Worm gearboxes are with good mechanical quality and steady operating performance which apply to deal with variety climate and temperature. We strive to develop Alfa Gears valve gear operators to meet higher demands in the market.
  • Enclosure: IP67 Standard (IP68 on request)
  • Working Temperature: From -50°C to 150°C (-4°Fto248°F)
  • Painting: Black RAL 9005, or according customer specification

The flange connecting to valve is according to EN ISO5211 or DIN3210 (Customization). including Sintered coupling system for various shaft connections. Please click on our link to dowload the Alfa Gears Dimensions or Alfa Gears Materials specification.

Our high standards

    1. Precision casting ductile iron GGG40 housing
    2. Optimal output torque, range up to 8500 Nm
    3. High efficient needle roller bearing
    4. High strength stainless steel Input shaft
    5. Stroke 0°- 90°(± 5°)
    6. Compact structure
    7. Grease filled for longer life
    8. Adjustable stopper (± 5°)
    9. Perfect sealing performance
    10. IP67 Enclosure Standard
Installation and Operating Manual Englisch Installation and Operating Manual German Datasheet MO15 (150Nm) Metric Datasheet MO35 (350Nm) Metric Datasheet MO75 (750Nm) Metric Datasheet MO200 (2000Nm) Metric Datasheet MO350 (3500Nm) Metric Datasheet MO550 (5500Nm) Metric Datasheet MO850 (8500Nm) Metric

Options MO-RANGE

Handwheels

The Alfa Gears Handwheels are available in various types such as: (SW) Steel Welded (SSW) Stainless Steel Welded (SP) Steel Pressed (SC) Steel Casted
Handwheels

3/2 relief valve

3.2 Relief Valve for single acting pneumatic actuation. Used to relieve air automaticly for the system.
3/2 Relief Valve

Alfa Insert system

Various inserts to suit all Alfa Gearboxes
Alfa insert system

Extensions / Brackets / Adapters

Alfa Gears can offer a large variation of inserts, mounting brackets, adapters, valve extensions and wormshaft extensions.

More information

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