Mercer Homepage Mercer Stainless Mercer Technologies Mercer Medical Mercer Building Products Mercer Australia
Home
About Us
Library
Services
Contact

Site Search


Type in a word or
phrase and click "Search"
Mercer Technologies \ Dairy/Cheese Equipment \ PV Valve
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