Table of Contents
Advertisement
DISC VALVE SYSTEMS AND
ABRASION RESISTANT
GENERAL
Myers Aplex Series has developed a unique setting/
puller system permitting quick, easy and safe methods
of installing and removing tapered seat valves.
The system allows servicing without distortion of the
seat, with minimum effort and NO damage to fluid end
tapers or seat.
Tapered seats notoriously drive solidly down into
mating deck tapers, so firmly that extraction heretofore
has always posed severe problems. Old style valves
may be pulled only with the greatest effort, using "J"
puller heads (prone to failure), CO
improvisations.
DISC VALVE AND ABRASION RESISTANT
VALVE CONSTRUCTION
TYPICAL DISC VALVE
LOCK NUT
SPRING RETAINER
SPRING
VALVE DISC
VALVE STEM
PULLING THREADS
VALVE SEAT
TYPICAL ABRASION RESISTANT VALVE
VALVE SPRING
GUIDE CAGE
POLYURETHANE INSERT
O-RING
VALVE BODY
VALVE SEAT
The Myers Aplex Series valve is a precision made
subassembly using threads cut into the rim of seat
for use with Myers Aplex Series setting/pulling tool.
These threads do NOT deteriorate as proved by field
experience. By locating these on the rim, setting/
pulling forces are now applied only to the rim of the
seat, never to the webs (or "spokes"), or to the center
section. Distortion of the seat is eliminated.
Access to these seat threads is provided by the removal
of the valve cage on abrasion resistant valve or the
spring retainer on disc valves which is screwed onto the
– dry ice, and other
2
seat. An anti-seizing lubricant applied to all threads is
good insurance against future difficulty.
SETTING THE VALVE SEAT
PULLER STEM
PUMP FLUID END
PULLER HEAD
Effective pressure-sealing between tapered (male) seat
and tapered (female) fluid end deck is possible ONLY
if the tapers are absolutely clean and dry just prior to
installation. Thoroughly clean surfaces using a clean
solvent. Dry with a CLEAN shop towel.
Examine the cleaned fluid end deck tapers, using
a flashlight, and remove all deposits of gyp, salt, or
other incrustation. Lightly emery cloth any minor
imperfections found in the deck taper.
The puller stem and puller head are provided with
tapered (locking) threads. Screw them together using
two pipe wrenches applied to the knurled areas
provided. Then screw the valve seat onto the puller
head by hand until it shoulders against the puller
shoulder. Do not tighten.
Lower the seat and puller assembly into the fluid end,
squarely setting the seat into the deck. Then pound the
top of the stem with a 6 pound hammer.
Unscrew the head and stem from the seat using a 1/2"
bar (or screwdriver) into the hole provided at the top
end of the stem.
28
INSERT 1/2" BAR TO
UNSCREW HEAD
FROM SEAT
DISCHARGE
VALVE DECK
SUCTION VALVE
SEAT
Advertisement
Table of Contents
