Depa DH50-FA - 5.3.2.5 AirSave Control Valve (M-Valve) Replacement; 5.4 Pump Assembling Guidelines

32
DEPA
®
Air Operated Diaphragm Pumps
5.3.2.5 Replacement of the AirSave
control valve (M-valve)
■ Remove AirSave valve and seal
■
Loosen the control block cover and
remove the seal
■
Push out the switch cartridge (Pilot cont-
rol) out
The switch cartridge and the AirSave control
valve require replacement as a complete unit.
Fig. 23: DH pump with AirSave control valve
5.4 Assembling the pump
The arrangement of parts can be seen in the
explodedview.
■ Assemble the gasket so that the air sup-
ply bore remains open (applies also for
assembly of the air chambers).
■
 Checkairlterandmuerforclogging,
replace if necessary.
■
During installation, the corresponding
tightening torques must be observed on
page42.
5.4.1 Assembling new clamp bands
(DL, DP, DZ, DF)
■ Assemble the new clamp bands and
pre-tension these with the clamping
bolts.
■ Knock the clamp bands lightly with a
plastic hammer onto the pump chamber
for easier settling.
■
Once the clamp bands have settled
tighten the clamping bolts.
Danger!
Retighten the clamp bands after
5 operating hours.