VALVES & FLOW CONTROL
THE VERSATILITY OF ZETRIX
ARI-ARMATUREN
IMPROVING H&S STANDARDS WITH
DOUBLE BLOCK & BLEED ISOLATION
Various industries all over the UK and
Ireland are benefiting from the added safety
and efficiency that the ZETRIX valve can
provide. With the advantages of a metallic
sealing process valve combined with a
butterfly design, these valves can be used
for isolation and control. Boasting zero
leakage and emissions, the triple offset
principle guarantees a permanently tight
seal, conforming to leakage rate A as per DIN
EN 12266-1 standards because the valve fits
precisely and closes without friction.
Setting the ZETRIX up as a double
block and bleed isolation offers many
benefits including improved Health and
Safety standards, reduced downtime for
maintenance repairs and considerable
savings when it comes to energy and cost.
This double isolation model has been
developed to meet the increasing demands
of Health and Safety requirements where
the traditional single isolation of plant is
inadequate. HSE guidance suggests that
double block and bleed is the only proved
isolation in accordance with HSE Guidance
253 (Safe Isolation of Plant and Equipment)
which states that double block and bleed
is greatest in the hierarchy of mechanical
security for isolation methods.
Using this method of double block and bleed
isolation means that a section of plant can
be isolated without having to shut down
an entire system, as would need to be done
with single isolation valves in place, therefore
allowing for easier and safer upgrade or
maintenance work.
The small face-to-face dimensions of the
ZETRIX provides even more versatility in
that should one wish to change from single
isolation to double isolation with bleed, only
small changes to pipe work are required.
A typical double block and bleed, which
incorporates two ZETRIX, is the equivalent
face-to-face dimension to the vast majority
of single isolation valves (typically gate and
parallel slide valves). Therefore, the ZETRIX
can be used for modifying pipe work with
single isolation to double block and bleed
in order to meet Health & Safety guidance
with very little alteration to the pipe work,
ultimately saving time and money (plant
downtime and labour costs dramatically
reduced). There are major benefits to using
double isolation in the space of one valve
more to the flexibility of this range. A version
with butt weld ends is now available, in
addition to the double flanged and fully
lugged designs.
as very little space is required, it reduces the
possibility of leak paths and is a lot safer than
relying on the integrity of a single isolation
valve.
With the ability to make the spool piece to
fit any gap, the system can be tailored to
specific installation restrictions. Currently,
other ranges on the market seem to have a
costly, limited choice in comparison to the
comprehensive range of pressure classes,
materials and sizes available with the ZETRIX
range from ARI-Armaturen. This solution can
also be supplied with all forms of actuation
including electric and pneumatic, if required.
Durable and reliable with high performance,
the ZETRIX valve range has impressed the
market for some time now and new types,
sizes and pressure ratings now add even
With its impressively quick closing action,
the valve can also be used as an Emergency
Shutdown Device, providing the ultimate
in tightness and safety. It is essential that a
Plant can rely on its isolation valves and this
speedy emergency shutoff action provides
the reassurance of complete safety with a
quality valve designed to stop the flow of a
hazardous fluid or gas upon the detection of
a dangerous event.
For more information, contact the UK
sales office.
ARI-Armaturen UK Ltd
Tel: 01684 275 752
Email: [email protected]
Visit zetrix.ari-armaturen.com/uk