Lockable wrench safeguards sensitive valves

Edited by the Engineeringtalk editorial team Jun 20, 2005

A new tamper-proof, lockable valve wrench ensures that a valve can only be operated by authorised users.

Flowserve Flow Control (UK) has introduced a new tamper-proof, lockable valve wrench that ensures the valve can only be operated by authorised users.

The wrench has been devised for process applications where valve position integrity could have a significant health and safety impact - notably isolation for downstream equipment maintenance, positive supply of emergency feeder systems or control of hazardous media.

The design employs a number of features to ensure that the valve cannot be overridden or accidentally operated.

These include: prevention of stop-pin removal; tamper-proof two-piece assembly; and prevention of wrench nut removal once the padlock is fitted.

A spring-loaded latch also ensures that the valve cannot be operated accidentally, even if the padlock is not fitted.

The patented lockable wrench, says Flowserve, is readily retrofitted to the great majority of Worcester valves, avoiding the need for costly plant upgrades by companies seeking to enhance their safety procedures.

According to the company, plant operators in the UK are increasingly aware of a continuing focus on operational health and safety.

This, coupled with recent rulings on locking devices and more stringent application of regulations regarding critical safety conditions lead Flowserve to believe there will be a growing requirement for greater valve position integrity.