Seat Ring Maintenance
Note
These joints should be made up with
high temperature gasket compound.
1. Remove old compound from body and seat ring
with a wire brush.
2. Apply new compound sparingly to both parts,
threads and shoulders. Let stand until tacky
before assembling.
Parts Ordering
When corresponding with your local Sales Office about
Type E5 Main Valve, always reference the assembly
number. When ordering replacement parts, specify
the complete character part number from the following
parts list.
Parts List
Key Description
Part Number
Type E5
NPS 3/4 to 3 / DN 20 to 80
See Table 4
NPS 4 to 12 / DN 100 to 300
See Table 5
Maintenance
▲
WARNING
To avoid personal injury or property
damage from sudden release of pressure,
isolate the regulator from the pressure
system and release all pressure from the
pilot and main valve before performing
maintenance operations.
Inspection
Under normal conditions, complete dismantling is not
recommended.
Check the following after operation. Then, schedule an
inspection as required.
1. Inspect for dirt collected at 4A bleed port.
2. Inspect all joints for leakage. Keep bolts tight to
avoid any leaks
Main Valve Maintenance (See Figure 5)
1. Connect a source of air or water pressure which
can be adjusted by hand to the No. 5B elbow.
2. Apply 30 psi / 2.07 bar to jack valve open and
prevent stem from turning while removing
stem nuts.
3. Use penetrating oil on the threads.
Grinding In
△
CAUTION
Seats and discs should never require
more than the lightest touch up with very
fine (400 grit) grinding compound. Heavy
grinding will produce galling, wider
seating surface and a groove in the disc,
all of which tend to cause leakage.
3. Reface a damaged surface before attempting to
grind it in.
4. Grind sparingly.
5.
Main stem (key 13, Figure 4) is slotted for rotation
with a screwdriver, valve spring (key 14) is omitted
from the assembly during grinding.
6. Slip the stem into its normal position.
7. Apply compound to the disc. Place it on the stem
and guide plug, tighten with stem nut.
8. After grinding, disassemble and clean all parts.
7
Type E5
