
ESI-6121 Rev D © Copyright 03/2022 MOGAS Industries, Inc.
www.mogas.com
ESI-6121 Rev D © Copyright 03/2022 MOGAS Industries, Inc.
www.mogas.com
44
45
Rework Components
Re-Assembly
CLEAN ALL PARTS
Clean all parts before assembly and / or parts
replacement.
POSITION VALVE BODY
Prior to assembly, verify that the valve body
02
is
resting on a flat surface in the vertical position with
the flanged-end down and body cavity upright.
1
2
INSTALL PACKING GLAND STUDS
Apply anti-seize compound before installing studs
12
.
3
CLEAN AND INSPECT
Clean all parts thoroughly before assembly.
Inspect seats and landing surfaces to ensure full contact.
All seals, gaskets, spring(s) and packing must be
replaced with new materials during assembly, to
ensure proper valve operation.
Note:
Refer to
Valve Part Reference Number
drawings (pages 4–7) for
identification of all seals, gaskets, spring(s) and packing.
CAUTION!
Any surface imperfections may create a leak.
3
!
BALL / SEAT LAPPING
Ball reworking and ball / seat lapping should
only
be
performed by MOGAS or a MOGAS authorized repair
facility.
CAUTION!
Only MOGAS approved components should be
used in re-assembled valves.
!
BALL AND SEATS
If the valve model is a DRI, DRIS or 1US, this step is
not required.
Notes:
IMPORTANT: The seats are uniquely identified to fit
only
a body or end
connection. Seats identified with an odd number fit the body only; seats
identified with an even number fit the end connection only.
Seat identification is also provided inside the stem slot of the ball to
ensure correct assembly of mate-lapped components.
When installing ball and seat assembly, lightly lap
back of seats
01B
to metal sealing surface on body
02
and end connections
03
, using lapping compound.
Apply machinist blue lightly to back of seat, then
contact body and end connection to visually confirm
full clean-up of sealing surface.
If surfaces do not clean up, send to MOGAS or a
MOGAS authorized repair facility for re-machining, or
call +1.281.449.0291 for technical assistance.
2
!
CAUTION!
If you disassemble, rework and re-assemble this
ball valve,
YOU WILL VOID YOUR WARRANTY
.