Jordan Valve Mark H-900 Series Globe Style Панель управления - Manual (Page 6)

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Lapping Metal Seats
While some leakage is expected with any metal-to-
metal seating in a valve body, excessive leakage can
be improved by lapping or grinding the valve plug and
seat ring. Deep nicks should be machined out. A good
quality commercial-grade lapping compound should be
used.
Apply lapping compound to the valve plug seating
surface. During lapping, the bonnet must be bolted to
the body and the gaskets (old gaskets may be used) in
place in order to keep the valve plug in line with the seat
ring. A simple grinding tool can be made using a piece
of strap iron fastened to the valve plug stem with nuts.
Rotate the handle in opposite directions to lap the seat-
ing surfaces.
After grinding, remove the bonnet and clean the seating
surfaces. Test for proper shutoff and repeat the process
if necessary.
Assembly
Caution must be used when working around the sealing
surfaces. Any nicks or scratches will compromise the
sealing ability. Prior to installing the seals, the sealing
surface should be wiped with a clean cloth.
1. Install the o-ring retainer (Key 13) into the valve
body.
2. Install the cage gasket (Key 5).
3. Install the cage (Key 12) into the valve body.
4. Proceed with steps 11 through 16 of the section
titled “Packing Replacement”.
P
arts
o
rderIng
Valves manufactured by Jordan Valve have individual
serial numbers, found on the valve nameplate. Please
refer to that number when ordering parts or contacting
your Jordan Valve Sales Representative. Individual part
numbers are listed in the following section. Please in-
clude these numbers when ordering replacement parts.
M
ark
H-900, H-1500
and
H-2500 s
eries
G
lobe
s
tyle
C
ontrol
V
alVes