ARO PD20 series - Trouble Shooting; Dimensional Data

PX20X-XXX-XXX-BXXX (en) Page 9 of 12
TROUBLE SHOOTING
Product discharged from exhaust outlet.
y
Check for diaphragm rupture.
y
Check tightness of (14) diaphragm screw.
Air bubbles in product discharge.
y
Check connections of suction plumbing.
y
Check “O” rings between intake manifold and inlet side
uid caps.
y
Check tightness of (14) diaphragm screw.
Motor blows air or stalls.
y
Check (176) check valve for damage or wear.
y
Check for restrictions in valve / exhaust.
Low output volume, erratic ow or no ow.
y
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
hose.
y
Check for pump cavitation - suction pipe should be sized
at least as large as the inlet thread diameter of the pump
for proper ow if high viscosity uids are being pumped.
Suction hose must be a non-collapsing type, capable of
pulling a high volume.
y
Check all joints on the inlet manifolds and suction con-
nections. These must be air tight.
y
Inspect the pump for solid objects lodged in the dia-
phragm chamber or the seat area.
DIMENSIONAL DATA
A
C
D
R
B
D
B
H
J
L
F
E
P
G
L
Q
M
K
N
(
Bolt circle)
Air Inlet
3/4 - 14 NPTF - 1
Exhaust port 1-1/2 - 11-1/2 N.P. T.
S
(Material inlet)
(PX20X-FXX-XXX-BXXX)
Material inlet
(PX20X-AXX-XXX-BXXX)
T
(PX20X-BXX-XXX-BXXX) U
Material outet
(PX20X-AXX-XXX-BXXX)
T
(PX20X-BXX-XXX-BXXX) U
S
(Material outlet)
(PX20X-FXX-XXX-BXXX)
Dotted lines show optional
67263 muer assembly.
DIMENSIONS
A - see below
B - 24-3/4” (628.7 mm)
C - 10-1/16” (255.6 mm)
D - see below
E - 16-3/16” (411.2 mm)
F - 12” (304.8 mm)
G - 26-1/4” (666.8 mm)
H - 9-1/16” (230.2 mm)
J - 10-1/16” (255.6 mm)
K - 9/16” (14.3 mm)
L - see below
M - 5/8” (15.9 mm)
N - 4.834” (122.8 mm)
P - 21-5/8” (548 mm)
Q - 27-7/8” (708.0 mm)
R - see below
S - 2” A.N.S.I. / DIN Flange
T - 2 - 11-1/2 N.P.T.F. - 1
U - Rp 2 (2 - 11 BSP, parallel)
“A” “D” “L” “R”
PX20X-XAX-XXX-BXXX 19-3/4” (501.7 mm) 1-7/8” (47.6 mm) 2” (50.8 mm) 12-15/16” (328.6 mm)
PX20X-XCX-XXX-BXXX 19-3/4” (501.7 mm) 1-7/8” (47.6 mm) 2” (50.8 mm) 12-15/16” (328.6 mm)
PX20X-AHX-XXX-BXXX 19-1/4” (488.7 mm) 2-1/2” (63.5 mm) 2-3/32” (53.0 mm) 13-9/16” (344.5 mm)
PX20X-ASX-XXX-BXXX 19-3/8” (492.1 mm) 2-1/2” (63.5 mm) 2-3/32” (53.2 mm) 13-9/16” (344.5 mm)
PX20X-FHX-XXX-BXXX 19-1/4” (488.7 mm) 2-1/2” (63.5 mm) 3-1/4” (82.6 mm) 13-9/16” (344.5 mm)
PX20X-FSX-XXX-BXXX 19-3/8” (492.1 mm) 2-1/2” (63.5 mm) 3-1/4” (82.6 mm) 13-9/16” (344.5 mm)
I - Side Discharge Ports are not avaliable on PX20X-XSX-XB Models.
PX20X-BHX-XXX-BXXX 19-1/4” (488.7 mm) 2-1/2” (63.5 mm) 2-3/32” (53.0 mm) 13-9/16” (344.5 mm)
PX20X-BSX-XXX-BXXX 19-3/8” (492.1 mm) 2-1/2” (63.5 mm) 2-3/32” (53.2 mm) 13-9/16” (344.5 mm)
Figure 4
Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).