CVS 50-1-DMV, Инструкция по эксплуатации

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Operation Continued,
4. Refer to Technical Data for volumes
achieved by long and short stroke
settings. The pump is assembled with
the adjusting pin inserted in the hole of
the plunger, nearest the plunger
packing gland nut. This is the position of
the longest stroke. To shorten stroke
place the brass adjusting pin in the
other hole.
5. Check the packing gland for leakage. If
leakage is occurring, use a flathead
screwdriver to tighten the Gland Nut
until leak just stops. Do not over tighten
the gland nut. This may stall the pump
or generate excessive wear on the
packing and/ or plunger. Do not adjust
packing under pressure.
Note: If low volumes are being pumped, the
pump head, fluid discharge line, and all other
fittings up to the line check should be
thoroughly purged of all air bubbles.
6. Replace cover gasket and body cover,
secure with wing screw.
Maintenance and
Troubleshooting
- Keep the cover in place and periodically
oil the thrust rod.
- Regularly check packing for leaks,
tighten or replace as required.
*NOTE: Ensure the plunger packing is not over
tightened. This may score the plunger and
decrease the lifespan of the packing.
- CVS chemical pumps used for alcohol or
methanol injection must be fitted with
Buna-N o-rings. Pumps used for most
chemical injection should be fitted with
Viton o-rings. The o-rings are located in
the Top Check Valve Seat (CVS-B-0368),
and the Bottom Check Valve Seat
(CVS-B-0698). Refer to manufacturer
specifications for elastomer sealing fluid
compatibilities.
- If the pump fails to stroke, and air/gas
constantly flows from the exhaust, the
diaphragm may be ruptured.
Disconnect air supply and bleed off
pressure. Remove the cover
(CVS-C-0001), and inspect main
Diaphragm (CVS-B-0010) for rips and
tears. Replace as required. See below
for diaphragm replacement procedures.
Diaphragm Replacement
*NOTE: If installing new diaphragm, shutoff
and disconnect air/gas supply and ensure the
pressure has been bled off.
- Remove Wing Screw (22), Body Cover (26),
and Cover Gasket (28)
- Insert a punch or screwdriver into the forward
slot of the thrust rod containing the roll pin, this
will prevent the rod from shooting out of the
body. Pry the thrust rod back and secure by
resting the punch/screwdriver at the bottom of
the pump body. At this point visually inspect the
return spring (6) for damage.
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