Magnum Venus Plastech Flex Molding Process PPVS-INFUSION VACUUM - Manual (Page 16)

PPVS Vacuum Sensor Manual
Rev. 03/2013 Page | 16
Introduction:
The PPVS is a control valve to provide a positive signal to a Turbo Autosprue (TAS) or
IVX3 Injection Valve to Open and Close dependant on the pressure sensed under an
infusion film / vacuum membrane. The PPVS-INFUSION fits into the MVP Universal
Insert port. It is normally factory set at 800mb absolute.
In operation it provides a positive signal when the mold cavity vacuum injection
pressures are below the set point pressure. This signal keeps the IVX3 or TAS open.
When the injection pressure reaches the set point the PPVS sends an air signal and
consequently closes the IVX3 or TAS thus stopping injection resin flow. This mode of
control between opening and closing of the IVX3 or TAS continues until the mold is full.
The pressure set point of the PPVS is always set below atmospheric pressure to ensure
the injecting resin never increases in sufficient pressure to force the infusion film away
from the fiber pack.
NOTE: It is important to have the correct parts drawing for the item you are
working on. This will assist in identifying the correct part numbers for the
assembly being rebuilt.
Use Red Grease (6706-2-1 1oz) or Magnum Gun Lube (GL-200 2oz) for the O-rings
(3265) on the valve nose.
NOTE: Before starting any service work, release fluid and air pressure from
system.
Please read the manual carefully. Follow the steps in the order given, otherwise you
may damage the equipment or injure yourself.
During Disassembly . . .
As you disassemble the equipment, lay out the components in the correct order and
direction, and have all component drawings available to refer to prior to disassembly.