Netherlocks interlocks

When you choose Netherlocks Valve Interlocks, you eliminate human error.

Using interlocks, you only allow the correct valve to be opened or closed in the correct sequence.

You guide your operators every step of the way – there is no bypassing the system.

Your valves are operated using a linear key, taking your operators through a specific process, following a predefined sequence, with unique keys for each step.

A product for all your process requirements

NDL valve interlock

You can mount the NDL Valve Interlock to any quarter turn valve, such as ball, butterfly and plug valves. The interlock will only release a key to your operators once the valve has reached full stroke – fully open or fully closed. Your operators will be guided step by step through the interchange of interlock keys. The interlock replaces the original valve lever with a new, stainless steel, sliding lever.

MRL valve interlock

You can mount the MRL Valve Interlock to any type of multi turn, hand wheel or gear operated valve. The interlock will only release a key to your operators once the valve has reached its full stroke – fully open or fully closed. Your operators are guided by the release of coded interlock keys, which will only be accepted by the next valve interlock in the sequence. The interlock replaces the original valve hand wheel.

Closure lock

With the Closure Lock, you interlock the closure door of a pigging vessel, preventing it from opening. This is a critically important product – you must at all costs, prevent access to a pressurised vessel. When combining the Closure Lock in an interlocking sequence, you guarantee that the isolation valve and the vessel is vented and drained, before your operators can unlock and open the door.

Actuator locking system

The ALS (Actuator Locking System) is a mechanical interlocking device for your motor operated valves. It locks and regulates operation of the local controls and manual override of your actuators. With the ALS, you can fully integrate your actuators into valve interlock procedures and sequences.

Actuator switch lock panel

Using the Actuator Switch Lock Panel (ASLP) you can manage the local controls of your actuators from a remote location. You can lock and regulate the operation of components of an actuator, mechanically locking (blocking) the power switch (supply), the manual override function and the position indicator.

Electrical switch lock

With the Electrical Switch Lock you can control the operation of electrical switches. With an Electrical Switch Lock you integrate operation of electrical devices into your valve interlock operations. This helps you determine certain safe process conditions – for example, preventing startup of a pump until the suction valve is opened.

Netherlocks interlocking