Interlocks for Ball Valves

Ball valves are being used as a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. These valves are manually operated most of the time.


Product Material Certification 2.1 , 3.1
Fire Test ANSI , API 607
Electro Polishing ASTM B912-02
Quality Management Systems ISO 9001:2015
Housing Material AISI 316
Interlocks For Ball Valves
Country The Netherlands

Key features/benefits

In order to ensure safe operation of ball valves, Alcatraz Interlocks provides quarter turn interlocks, with both single and double keys in three sizes: small, medium and large.

Alcatraz integral quarter turn (DQL/SQL) valve locks fits on all type of lever operated valves/quarter turn valves such as ball valves, plug valves, 3-way ball valves, butterfly valves and even instrument valves. They are mounted on 90° rotating valves to interlock the locked open and/or locked closed position of the valve. The key movement is only possible in fully open / closed position thus providing an extra confirmation that the valve is in the exact desired position as compared to car seals etc.

Applications of ball valves interlocks

Alcatraz’ Interlocks for ball valves can be used in multiple situations like control valve flow, ensuring safe valve operation, safe switchover of pressure safety valve systems and operation of pig trap systems. To offer the right interlock for a ball valve we need to understand your application and sequence of actions. To do this properly our dedicated team could assist you with measurement, commissioning and installation. Ball valves are common used in applications like:

Solutions for interlocking ball valves

Ball valves utilize a lever to operate. To lock these valves we have designed different kinds of interlocks depending on your sequence (linear or nonlinear), our engineering department will design it.

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