ARO PM20 Series Benutzerhandbuch - Seite 9
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Product discharged from exhaust outlet.
Check for diaphragm rupture.
y
Check tightness of (14) diaphragm screw.
y
Air bubbles in product discharge.
Check connections of suction plumbing.
y
Check "O" rings between intake manifold and inlet side
y
fluid caps.
Check tightness of (14) diaphragm screw.
y
Motor blows air or stalls.
Check (176) check valve for damage or wear.
y
Check for restrictions in valve / exhaust.
y
(Dimensions shown are for reference only, they are displayed in inches and millimeters (mm)).
21-5/8" (548.2 mm)
16-3/16" (411.1 mm)
3"(76.2mm)
Dotted lines show optional
67263 mu er assembly.
Dotted lines show optional
67213 mu er kit.
PM20X-X-X-BXX (en)
TROUBLESHOOTING
DIMENSIONAL DATA
2-1/2" Sanitary Flange
2-1/2" Sanitary Flange
12" (304.8 mm)
3/4 - 14 NPTF
26-9/32"
(667.4 mm)
9-1/16"
Exhaust Port
1-1/2 - 11-1/2 NPTF
(230.2 mm)
10-1/16"
2-1/2" Sanitary Flange
(255.6 mm)
Low output volume, erratic flow, or no flow.
Check air supply.
y
Check for plugged outlet hose.
y
Check for kinked (restrictive) outlet material hose.
y
Check for kinked (restrictive) or collapsed inlet material
y
hose.
Check for pump cavitation -- suction pipe should be sized
y
at least as large as the inlet thread diameter of the pump
for proper flow if high viscosity fluids are being pumped.
Suction hose must be a non-collapsing type, capable of
pulling a high vacuum.
Check all joints on the inlet manifolds and suction con-
y
nections. These must be air tight.
Inspect the pump for solid objects logged in the dia-
y
phragmchamber or the seat area.
19-11/32" (491.3 mm)
OUTLET
Air Inlet
INLET
9/16" Slot (14.3 mm)
10-1/16"
(255.6 mm)
Figure 4
24-3/4"
(628.7 mm)
13-9/16"
(344.5 mm)
2-1/2"
(63.5 mm)
Page 9 of 12