Working together with Rotork Gears to ensure your safety

11 November 2015

Over the last year we have been working closely with Rotork Gears. Rotork is the market leading actuator manufacturer and flow control company that operates in any market where the flow of gases or liquids needs to be controlled. The company is divided in several divisions. One of the divisions is called ‘Rotork Gears’.

Gear operated valve interlock Rotork handwheel valve Interlocks for Rotork IQ3 Actuators Quarter-turn worm gearbox interlock Logo Rotork Gears

Specialist supplier of valve gearboxes

This division is a specialist supplier of gearboxes, adaptations and accessories. They provide an extensive range of valve gearboxes. These gearboxes are designed to withstand the harsh challenges of valve operating environments, just like our interlocks. 

In The Netherlands Rotork Gears B.V. is situated in a town called Losser, this is a small town near Twente. On this location Rotork Gears have one of their worldwide manufacturing locations of gears, controls and fluid systems.


But enough about Rotork only, let’s talk about the strong collaboration between Alcatraz Interlocks B.V. and Rotork Gears B.V. Combining the best of both worlds, Alcatraz interlock solutions on Rotork gears.

We were invited to visit the manufacturing facilities in Losser. After driving a couple of hours we had the pleasure to see first class high quality manufacturing of Rotork gears. These products are matching the high quality of our own interlock solutions.

Alcatraz Interlocks has developed an interlock design that fits the Rotork AB-series. The AB range of quarter-turn operators have a cast iron housing and are intended for applications in chemical, power, waterworks, HVAC and most general industrial applications.

Specifications of the AB-series gears:

  • Cast iron housing
  • Protected input shaft (Stainless Steel optional)
  • 15 models up to 32,000 Nm output
  • Rugged construction
  • Axial needle bearings
  • Polyurethane coating
  • Stroke: 0 to 90º (+/- 5º adjustable)
  • Firesafe to ISO10497

We are also pleased to announce the world's first smallest quarter-turn interlock for one of the smallest gears: the Rotork type 242P quarter-turn worm. The Rotork 242P series is a range of nuclear related gearboxes, designed to optimise robustness and durability. The simple, rugged construction of this gearbox makes it the choice for low torque applications. The 242P gearboxes are intended for the operation of ball, butterfly, plug and any other quarter-turn valves. This range comprises:

  • 5 sizes
  • Ratios of 40:1 to 60:1
  • Torque range up to 1000Nm

In harmony

We developed a gear operated valve interlock system, actuator interlocks and quarter-turn worm gearbox interlocks in such a way that it does not infringe in the design and/or function of the gears. By utilizing the Rotork flange and thus allowing our interlocks to be mounted directly onto the ISO flange 5211 (see picture 1). Creating a clean and non-intrusive design. Together preventing hazardous situations under any condition.

Our DML, double key integral multi turn valve lock, operates perfectly in harmony with the Rotork AB-series gears. Operators are constrained to follow the correct sequence of operation.

We would like to thank Rotork Gears B.V. for the opportunity to visit their facilities in Losser. We are looking forward to many more collaborations and visits in the future. 

Lester Millard


Stedenbaan 6
5121 DP Rijen
The Netherlands

Phone: +31 76 514 7172
Fax: +31 76 522 5296

Safety by design