SECTION 7
HIGH PRESSURE WATER
Nov 2002
p. 7-13
05126826
7.3.1 Discharge HP Check Valve
The HP discharge check valve can be serviced with the sealing head
either installed in or removed from its intensifier HP cylinder.
1. Remove the gland nut from the sealing head using two 30mm (1-
3/16”) wrenches.
2. When the gland nut is removed, the spring guide and spring will
normally stay in the gland nut. The poppet is removed by carefully
dislodging it with a screwdriver. The valve seat is removed with a
magnet. Inspect the seat for damage or cracking. A cracked seat
should be replaced. The seat is symmetrical, and can be installed
with either face toward the poppet. Note that a slight burr at the hole
edge identifies the used side of the poppet seat. When reinstalling the
seat, apply a thin film of High Purity Goop to both faces. Install the
seat into the sealing head with the best surface facing the check
poppet.
Item Description
(1) Sealing Head (2)Poppet (3) Gland Nut
(4) Poppet Seat (5) Spring (6) Guide Pin
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