Multi Rotation Lock (MRL)0 pages

Process Interlocking
Multi Rotation Lock (MRL)
The Multi Rotation Lock (type MRL) is suitable for all hand
wheel-operated valves like gate-, globe- and gearbox-operated
valves.
The MRL can be mounted without any alteration to the host
valve, and the characteristics of the valve remain unchanged.
The lock is installed as an integral part of the valve, with the
original hand-wheel removed and replaced with a new, samesized
Stainless Steel hand wheel.
Since the number of rotations to open or close a valve is
different for almost every valve, the MRL has a field adjustable,
easy to set counting mechanism.
The principle of mechanical key interlocking is the transfer of
keys. Each lock is executed with two keys: one for the locked
open position and one for the locked closed position. When the
valve is open the “open” key is released, can be removed ready
to operate the next lock in the sequence, which will share the
same code. All keys are unique and depending on the
sequence NETHERLOCKS will determine the codes to
guarantee the required sequence.
Technical specifications:
o Fully made of stainless steel AISI 316
o Stainless steel hand wheel is provided in the same size as
the original
o Robust, reliable and simple design with a minimal amount
of parts
o Maintenance free, no Grease
o Mounting can be done without shutting down the plant or
making modifications to the valve
o Invulnerable for sand, dirt, snow, ice, etc.
o Thoroughly tested to withstand the most extreme operating
environments
o Tamperproof; integrated second safety to prevent
unlocking with an unauthorized object other than the
designated linear key