Balcrank 1120-037 CF50 Buna-N Guía De Servicio Técnico Y Recambio página 10

EN
REPAIR AND MAINTENANCE PROCEDURES
TORQUES NECESSARY FOR THE PROPER FUNCTIONING OF THE PUMP
For proper operation of the pump and to prevent accidents which may damage equipment and in the worst case, people, you must periodically review the
torques of the diaphragms covers and the DIRECTIONAL VALVE. In the next table are shown the appropriate torques for this purpose:
Diaphragm cover
Torques CF50 Directional valve
Manifolds
DIAPHRAGM MAINTENANCE
Before any intervention: DISCONNECT AIR SUPPLY OF THE PUMP.
IT IS NOT NECESSARY TO REMOVE THE PUMP FROM THE FLUID LINE.
Removing the diaphragm:
INSTALLING THE NEW DIAPHRAGMS
ASSEMBLING PROCEDURE
CAUTION: Follow next procedure to ensure the diaphragms are
correctly installed. If not followed diaphragm bead could be extruded
out of its housing with the resulting damage over the diaphragm bead
and thus possible fluid leaks or premature diaphragm failure.
CAUTION!
1. Correct assembly of the
diaphragm before the
diaphragm cover assembly.
10
SB 1147 Rev A 07/2017
Balcrank Corporation • Weaverville, N.C. 28787 • Phone (800) 747-5300 • Fax (800) 763-0840
2. CAUTION! Incorrect
assembly of the diaphragm.
Possible damage when
assembling the diaphragm cover.
132 lbf·in ( 15 N·m)
70 lbf·in ( 8 N·m)
132 lbf·in (15 N·m)
1. Close inlet and discharge fluid valves.
2. Drain the fluid inside the pump. Anticipate a drainage of fluid from
inside the pump.
3. Remove the directional valve while being careful not to damage the
seals between air valve and
diaphagm
4. Remove the diaphragm cover.
NOTE: To tighten these screws you must use a torque wrench
calibrated to (see torque table in this page).
5. Remove the cover by gently pulling back.
6. Remove the used diaphragms.
1.
PREPARING THE CETRAL ROD FOR DIAPHRAGM INSTALLATION
Using a soft head hammer displace the central rod out of the body
enough to install the diaphragm without deforming it.
Avoid instally the diaphragm without preparing the central rod in its
proper position. Diaphragm bead could be damaged when installing
diaphragm cover.
SOFT HEAD
.
NOTE: Be careful to not lose
the seals between valve and
diaphragm cover.