Technology from Europe:
United Kingdom

Anti-tamper lock prevents unwanted operation

The anti-tamper Lock secures assets by reducing the risk of human error or deliberate tampering.

By ensuring valves and actuators are only operated by authorized individuals, the Anti-Tamper Lock (ATL) from Essex-based Smith Flow Control secures companies’ assets by reducing the risk of human error or deliberate tampering.

The ATL is very simple. The standard condition of the device in service is locked (key-free), with the handwheel free-rotating (the standard unit is available in two sizes to suit all lever- and handwheel-operated valves). Operation involves three steps:

1. A coded key from the control authority is inserted, engaging the drive.
2. The valve is operated to the desired position.
3. The key is removed and the valve is locked in the desired position.

Because the lock base adapter is machined to suit the valve, the ATL reduces costs. Machining can be done on-site or the lock can be supplied machined to specification. Mounting the lock replaces the existing handwheels or levers, so the integrity of the valve pressure envelopes are not compromised. The ATL is installed and commissioned once.

For safety applications, the housing is supplied in stainless steel coated with yellow polyester resin. For security applications, locks are manufactured from hardened steel, with a protective security “skirt.” Both versions can operate in temperatures ranging from – 8°F to 212°F ( – 50°C to 100°C).