Howden Gýrol® Fluid Drives

Howden Gýrol® Fluid Drives are the most practical solution to variable speed control. They transmit power at the exact speed required for the job. Smoothly. Quietly. Reliably.

Howden Gýrol® Fluid Drives consistently achieve high reliability ratings under the most demanding conditions and in the harshest environments, in addition the reliable and proven technology is unaffected by obsolescence and does not require software upgrades or updates.

You can learn about how they work on our blog.

Why choose Howden Gýrol® Fluid Drives?

No load starting

You can therefore use the most economical driver to accelerate high inertia loads. You can also use the most economical motor and starter.

Controlled acceleration

Acceleration can be controlled at any rate, once the driver has reached full speed.

Infinitely variable speed control

Allowing for stepless adjustment over a wide range.

Isolation of load from the driver

Isolation is especially important when applications require load to be operated intermittently.

Absorbs shock and torsional vibration

Especially in irregularly loaded equipment such as extruders, conveyors and crushers.

Functions as a torque limiter

Limiting the torque is required to protect the driver and load.

Reduces wear and noise

By allowing driven equipment to often run at reduced speeds, the noise and wear on the equipment is reduced.

Transmits power efficiently

When operated at the design point.

Unmatched reliability

The wear-free transmission of power means that it is incredibly reliable

Compact and robust design

Suitable for all environments no matter how harsh or how extreme the climate.

Maintenance friendly

Simple (yet innovative) design, use of standard parts and no special tooling.

Long service life

Our Gýrol® Fluid Drives have a lifespan of over 30 years.



  • ​Turnkey availability.
  • Field service availability.
  • ​Retrofits and rebuild offerings.
  • ​Remanufactured units.
  • ​OEM capabilities with parts availability.


  • Variable torque applications
  • ​​​Fans.
  • ​Blowers.
  • ​Centrifugal pumps.
  • ​Centrifugal compressors.
  • Constant torque applications
  • Reciprocating compressors.
  • ​Extruders.
  • ​Mixers.
  • Crushers.
  • Mills.
  • Conveyors.


Class 2

Howden Gýrol® Class 2 Fluid Drives are used to control speed and to absorb shock and torsional vibration.

Download brochure

Class 4

Howden Gýrol® Class 4 Fluid Drives consistently achieve high reliability ratings under the most demanding conditions and in the harshest environments.

Download brochure

If you would like to submit an enquiry please get in touch.

Find your contact

Change location

General enquiries: 

Nick McLean

+44 141 885 7500

Parts & Service

Lifetime Support

Our lifelong aftercare service will supply original replacement parts, support you with maintenance and installation, and even train your own engineers in maintenance techniques. We keep detailed plant records almost indefinitely, and regularly supply spare parts for machinery over 50 years old.

Howden Highlights

How do Howden Gýrol® Fluid Drives work

You can read an explanation of how these remarkable machines work, on our blog.

Read more