Magnum Venus Plastech Pro Series VPRO-45220 22:1 & 7:1 - Manual (Page 32)

VPRO-45220 Series Resin Pump Manual
Rev. 11/2013 Page | 32
Female Compression Ring
Piston Rod Packing Set
Male Compression Ring
3. Push the packing set, the spring and the spring retainer onto the piston rod and up into
the packing cavity.
Optional Packing Sets:
VLS-2405-2U2G STAGGERED PISTON ROD SET
VLS-2405-GFT PACKING SET
VLS-2405-U PACKING SET
Install Piston Body Assembly:
1. Insert the piston ball spring into the piston rod, being sure that the spring goes onto the
end of the dowel pin (located on the bottom of the piston rod).
2. Take the piston body assembly (consisting of the ball, compression ring, piston cup,
spacer ring, piston cup, backup ring, and piston body), and thread it into the end of the
piston rod.
CAUTION: If the piston body is screwed tightly against the piston rod, but the packing
cups still rotate easily, the top of the compression ring is not aligned correctly.
Disassemble the piston body and reinstall it.