The Benefits of Pro-Lock® The Best Solution for Valve Lockout


Lockout Comparison – Benefits of Pro-Lock®

Here we compare the various methods of valve lockout devices with all the Benefits and Difficulties of each and how Pro-Lock® is the superior choice in almost every scenario.


None! But we would say that wouldn’t we.

Benefits of Pro-Lock:

Secure – even without lock or seal, an Operating Tool is needed to remove.

Locks most types and size of valve.

Cost-effective – once purchased, no further lock-off expense, a better investment than disposable, environmentally unsustainable alternatives.

Lightweight – when used in industrial environments, an operator carrying a length of wire and bag of Pro-Lock® devices can lock-off numerous valves.

Durable – an all stainless steel and Polypropylene construction.

Can be used without padlock and/or security seal if desired.

Padlocks can be used in conjunction with the Pro-Lock®, thus retaining the advantage of dispensing with chains

Pro-Lock® can be tightened by hand – the most effective way of securing the valve or other item determined, before finally locking tight with the dedicated tool.

The wire is introduced from the sides, so avoiding the difficulties of threading wires with worn or splayed ends.

Pro-Lock® devices and wire are available in different colours to allow differentiation between locked open and locked closed valves.

The Multi Stranded galvanised wire is PVC coated for added weather protection and increased visibility

Pro-Lock® has an enormous range of possible applications – on construction sites, in industrial environments and, of course, in the Oil, Gas and Petrochemical industries. Easy to use, reliable and extremely hard wearing, Pro-Lock® is one of the most effective and versatile locking systems currently available. For maximum security applications, the most cost efficient lock-off combination is Pro-Lock®, steel wire, and a numbered security seal. Isolation details can be written on security seal, thereby eliminating the need for high cost labels.

One Use disposable Cable Seals

Can be Expensive for Valve Lockout Quality

Disposable Can only be used once

Sometimes need two or three for one valve, which are often cut off after a short time

Can be susceptible to corrosion in salty environments

Keys can easily be lost.

People tend to pick up a handful but then do not use them all. This soon results in a box of seals and no keys

Can be difficult to use when wearing gloves

Sequential numbers can be difficult to read when new, and impossible after a few weeks in position

Can Create waste and cause housekeeping issues

Can incur more frequent shipping costs because they are only used once and more are required

More cost-effective than the systems so far described, however, see how pro-lock also works for the above applications at a fraction of the long-term cost. Can be cost-effective for very long-term isolations. For this reason we offer a selection of aluminium and Stainless Steel cable seals


Can be susceptible to corrosion in salty environments

Can be prone to failure in cold conditions


Useful in the home, so susceptible to pilfering

Keys can be lost

User unfriendly; Often difficult to read lock and key numbers

Ideal for electrical switchgear.

The only solution if you wish to uniquely lock each isolated item.

Can be used in addition to most lockout systems.

However, the Pro-Lock® system is the only system that is capable of being used with or without a padlock.

A selection of High-Quality British made Padlocks are available from Pro-Lock®


Not user friendly


Present Manual Handling issues

Often stored in a tangled heap cut to varying lengths

Difficult to thread through small openings

Difficult to adjust the length and fit – Always require additional padlocks

The ideal solution, used with high security padlocks, for remote unmanned locations to prevent vandalism, and theft from pipelines and vessels.

Miscellaneous Lockout Devices

Mostly only lock individual valve types


Difficult to use

Gate valve lockout device

Those that lock more than one valve type are expensive. Although good quality and innovative, the prices are

Prohibitive compared to other systems. See the Python and hybrid cable locks below:

Possibly can be justified when small numbers are required for infrequent isolation’s. However, see how the Pro-Lock® valve lockout system also works for the above applications at a fraction of the cost.

For Sales & Assistance

Call 01253 811333