| Mercer Technologies \ Dairy/Cheese Equipment \ PV Valve |
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PV VALVE - Patent No. 331111
A unique, first of it’s kind valve in the world, that delivers
venting, vacuum protection, over-pressure protection and over
fill protection for tankers or static silos.
The Mercer PV valve offers protection against normal volume
changes during transportation and routine operation. It
provides pressure and vacuum protection of tanks and vessels
in potential failure situations and in addition offers protection
from overfilling should an already full tank continue to be
overfilled. The valve also offers a solution to the problem of on
road leakage caused by product surge because of the
incorporation of a dwell time in the pressure relief.
The PV valve design has been further enhanced by the design
and development of a patented filter kit to EU6 level that can
be retrofitted to existing valves. This allows for the protection
of transported food products, avoiding the possibility of
the ingress of contaminated airflow especially whilst in
transit.
All Mercer PV valves are able to be fitted with an internal
CIP system. For those installations where the CIP pipe
header is inside the tank, cleaning is available through
the addition of a directional cleaning jet positioned
immediately under the valve. External pipe work is easily
connected to the valve via a teflon tube.
| Feature |
PV-A6O |
PV-A6OEU |
PV-M3 |
PV-A3C |
| Allows air equalisation during filling & emptying |
Yes |
Yes |
Yes |
Yes |
| Actuated to reduce stress under normal filling & emptying conditions |
Yes |
Yes |
No |
Yes |
| Normal position without actuation |
Open |
Open |
N/A |
Closed |
| Sight Rod shows valve position |
Yes |
Yes |
Yes |
Yes |
| External connection to CIP system |
8mm nylon |
8mm nylon |
N/A |
6mm nylon |
| Over filling protection |
Yes |
Yes |
Yes |
Yes |
| Dwell time to eliminate on-road leakage through product surge |
Yes |
Yes |
Yes |
Yes |
| Air actuation supply connection |
6mm dia. |
6mm dia. |
N/A |
6mm dia. |
| Air actuation supply pressure (minimum) |
60 kPa |
60kPa |
N/A |
60 kPa |
| CIP |
Yes |
Yes |
No |
No |
| EU6 filtration |
No |
Yes |
No |
No |
| Specification |
PV-A6O |
PV-A6OEU |
PV-M3 |
PV-A3C |
| Construction material |
316 stainless |
316 stainless |
316 stainless |
316 stainless |
| Sealing piston material |
UHMW |
UHMW |
UHMW |
UHMW |
| Design fill rate |
2 000l/min |
2 000l/min |
500l/min |
500l/min |
| Design discharge rate |
2 000l/min |
2 000l/min |
500l/min |
500l/min |
| Vacuum protection |
-3.5 kPa |
-3.5 kPa |
-3.5 kPa |
-3.5 kPa |
| Over pressure protection |
35 kPa |
35 kPa |
35 kPa |
35 kPa |
| Height |
270mm |
270mm |
117mm |
252mm |
| Fitting required on tanker |
150mm RJT male |
120mm RJT male |
76mm RJT male |
76mm RJT male |
| CIP requirements @ .5 bar |
720L/hr |
1140L/hr |
N/A |
360L/hr |
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