Clayton Steam Generator model EO-100-1
PAGE 43 / 70
Instruction Manual, doc.nr.: MAN18206 Rev A PSC
9.1.1
PUMP CHECK VALVE MAINTENANCE ( FIG 8.1 )
•
Unscrew check valve caps from check valve housings and disassemble springs and discs from caps.
Remove scale and pits from discs by rubbing them in a "figure 8" motion on a piece of fine sandpaper
(wet-or- dry Nr 400 or finer)
placed on plate glass. Discs must be perfectly smooth and flat for proper
water pump operation.
•
Inspect springs for distortion and free length. Free length of discharge springs should be
25 mm
, free
length of intake springs should be
19 mm
. If not within 1mm, replace spring. Also replace broken or
distorted springs.
•
Inspect seats for scored or damaged condition. Replace damaged seats
•
Scale may be removed from inside of check valve housings by filling the housings and pump columns
with a solution of two parts water and one part Clayton Manufacturing Company
KLEENKOIL
or
other properly inhibited scale removing acid. Scale on springs and discs may be removed by
immersing in the same solution. After scale has been dissolved, thoroughly flush parts with water.
Open drain cock and flush pump columns.
9.1.2
REPLACING WATER PUMP VALVE SEATS ( FIG 8.2 )
To replace the valve seats, it will be necessary to use a special seat puller
(part nr. UH-25257 and a special
seat driving tool part nr UH-18389).
•
Adjust puller stem counterclockwise until jaws can be retracted into the body. Unscrew body nut
sufficiently to allow retracted jaws to extend below valve seat when puller is inserted into check valve
housing
(fig 8.2 A)
•
Insert puller into check valve housing and turn stem clockwise in body, until jaws are fully extended
below bottom of valve seat
(fig 8.2 B).
•
Hold body with wrench and turn body nut clockwise until valve seat is free of check valve housing
(fig 8.2 C).
•
Drive in new seat assembly
using seat driving tool
(fig 8.2
D)
using
care
to
avoid
damaging seat face.
•
After seats have been properly
installed, assemble springs to
check valve discs. Install
correct springs and caps in
proper ports of check valve
housing.
Fig 8.2 : Use of special seat puller and seat driver
NOTE :
Remove and process check valves one at a time to avoid interchanging parts.
When reassembling, assemble the spring to the disc and attach spring to valve cap. This will
prevent unnecessary distortion and possible deformation of the springs.
Содержание EO-100-1M
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