A total of 1160 wireless VPI
(Valve Position Indicator)
units have been ordered from
Dutch valve safety specialist
Netherlocks by Bilbao
Petronor Oil Refinery
following a three year pilot.

The VPI provides a
feedback signal from hand
wheel operated valves,
converting the open and
closed positions to a digital
signal by way of a mechanical
counter system.

The VPI is an ‘add-on’
product, and can be mounted
to new or existing hand wheel
operated gate, globe or rising
stem valves without
interrupting normal process.

Coupled with the mechanical
counter system, Netherlocks
uses an ATEX-approved
switch as standard – though
customers are able to change
this specification if required.

Petronor wanted a wireless
solution – which posed no
problem using the VPI
technology.