Blagdon Pump X40 Metallic - Manual (Page 21)

Blagdon Pump • A Unit of IDEX Corporation • R79 Shannon Industrial Estate • Shannon, Co Clare, Ireland • Tel: +353 (0) 61 471933 Fax: +353 (0) 61 475046
www.blagdonpump.com • E-mail: [email protected]
x40mdl1sm-rev1111
Page 19
Air Operated Double Diaphragm Pump 8/05 Page 19
Check Valve Drawing CHECK VALVE SERVICING
Before servicing the check valve
components, first shut off the suction
line and then the discharge line to the
pump. Next, shut off the compressed air
supply, bleed air pressure from the
pump, and disconnect the air supply line
from the pump. Drain any remaining fluid
from the pump. The pump can now be
removed for service.
To access the check valve
components, remove the manifold
(item 23 or item 22 not shown). Use a
9/16" wrench or socket to remove the
fasteners. Once the manifold is removed,
the check valve components can be
seen.
Inspect the check balls (items 2) for
wear, abrasion, or cuts on the spherical
surface. The check valve seats (item 34)
should be inspected for cuts, abrasive
wear, or embedded material on the
surfaces of both the external and internal
chambers. The spherical surface of the
check balls must seat flush to the
surface of the check valve seats for the
pump to operate to peak efficiency.
Replace any worn or damaged parts as
necessary.
Re-assemble the check valve
components. The seat should fit into the
counter bore of the outer chamber.
The pump can now be reassembled,
reconnected and returned to operation.
METALLIC SEATS
Two o-rings (or conductive PTFE
seals) (item 27) are required for metallic
seats.
with Non-Metallic
Seats
with Metallic Seats