Wilden P8, PX8 Engineering, Operation & Maintenance
P8/PX8
Original™ Series PLASTIC Pumps
Engineering
Operation &
Maintenance
Simplify your process
WIL-10131-E-01
TABLE OF CONTENTS
SECTION 1 CAUTIONS—READ FIRST! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SECTION 2 WILDEN PUMP DESIGNATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SECTION 3 HOW IT WORKS—PUMP & AIR DISTRIBUTION SYSTEM . . . . . . . . . . . . . . . . 3
SECTION 4 DIMENSIONAL DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SECTION 5 PERFORMANCE
A. P8 PLASTIC Performance Curves
Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ultra-Flex™-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Suction Lift Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
B. PX8 PLASTIC Performance
Operating Principal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
How to Use this EMS Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Performance Curves
Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Ultra-Flex™-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Suction Lift Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING . . . . . . . 20
SECTION 7 DISASSEMBLY/REASSEMBLY
A. Pump Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
B. Pro-Flo® Air Valve / Center Section Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
C. Pro-Flo X
TM
Air Valve / Center Section Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . .28
D. Reassembly Hints & Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
E. PTFE Gasket Kit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
SECTION 8 EXPLODED VIEW & PARTS LISTING
P8 Rubber/TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
P8 PTFE/Ultra-Flex™-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
PX8 Rubber/TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
PX8 PTFE/Ultra-Flex™-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
SECTION 9 ELASTOMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
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U.S. Clean Air Act
Amendments of 1990
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Section 1
CAUTIONS – READ FIRST
CAUTION: Do not apply compressed air to the exhaust
port — pump will not function.
CAUTION: Do not over lubricate air supply — excess
lubrication will reduce pump performance.
TEMPERATURE LIMITS:
Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°F
Neoprene –17.7°C to 93.3°C 0°F to 200°F
Buna-N –12.2°C to 82.2°C 10°F to 180°F
EPDM –51.1°C to 137.8°C –60°F to 280°F
Viton
Wil-Flex™ –40°C to 107.2°C –40°F to 225°F
Saniflex™ –28.9°C to 104.4°C –20°F to 220°F
Polyurethane –12.2°C to 65.6°C 10°F to 150°F
Tetra-Flex™ 4.4°C to 107.2°C 40°F to 225°F
PTFE 4.4°C to 104.4°C 40°F to 220°F
®
–40°C to 176.7°C –40°F to 350°F
CAUTION: When choosing pump materials, be sure
to check the temperature limits for all wetted components. Example: Viton
(350°F) but polypropylene has a maximum limit of only
79°C (175°F).
CAUTION: Maximum temperature limits are based
upon mechanical stress only. Certain chemicals will
significantly reduce maximum safe operating temperatures. Consult engineering guide for chemical compatibility and temperature limits.
CAUTION: Always wear safety glasses when operating pump. If diaphragm rupture occurs, material being
pumped may be forced out air exhaust.
Plastic series pumps are made of virgin plastic and are
not UV stabilized. Direct sunlight for prolonged periods
can cause deterioration of plastics.
WARNING: Prevention of static sparking — If static
sparking occurs, fire or explosion could result. Pump,
valves, and containers must be grounded when
handling flammable fluids and whenever discharge
of static electricity is a hazard. To ground the Wilden
“Champ,” all clamp bands must be grounded to a
proper grounding point.
®
has a maximum limit of 176.7°C
CAUTION: Do not exceed 8.6 bar (125 psig) air supply
pressure.
CAUTION: Before any maintenance or repair is
attempted, the compressed air line to the pump should
be disconnected and all air pressure allowed to bleed
from pump. Disconnect all intake, discharge and air
lines. Drain the pump by turning it upside down and
allowing any fluid to flow into a suitable container.
CAUTION: Blow out air line for 10 to 20 seconds
before attaching to pump to make sure all pipeline
debris is clear. Use an in-line air filter. A 5µ micron air
filter is recommended.
NOTE: When installing PTFE diaphragms, it is important to tighten outer pistons simultaneously (turning in
opposite directions) to ensure tight fit.
NOTE: P8 and PX8 PVDF pumps come standard from
the factory with expanded PTFE gaskets installed in
the diaphragm bead of the liquid chamber, in the
T-section and in the ball and seat area. PTFE gaskets
cannot be re-used. Consult PS-TG for installation
instructions during reassembly.
NOTE: Before starting disassembly, mark a line from
each liquid chamber to its corresponding air chamber. This line will assist in proper alignment during
reassembly.
CAUTION: The P8 Plastic pump is not submersible. If
your application requires your pump to be submersed,
the PX8 model can be used with the submersible
option.
CAUTION: Pumps should be flushed thoroughly with
water before installation into process line.
CAUTION: Tighten all hardware prior to installation.
WIL-10131-E-01 1 WILDEN PUMP & ENGINEERING, LLC
Section 2
WILDEN PUMP DESIGNATION SYSTEM
P8/PX8 ORIGINAL™
PLASTIC
51 mm (2") Pump
Maximum Flow Rate:
587 lpm (155 gpm)
MATERIAL CODES
MODEL
P8 = PRO-FLO
PX8 = PRO-FLO X
WETTED PARTS & OUTER
PISTON
KK = PVDF / PVDF
PK = POLYPROPYLENE /
AIR CHAMBERS
A = ALUMINUM
C =
S = STAINLESS STEEL
CENTER BLOCK
P = POLYPROPYLENE
AIR VALVE
P = POLYPROPYLENE
L = ACETAL (P8 only)
LEGEND
P8 /XXXXX / XXX / XX /XXX / XXXX
MODEL
®
TM
PVDF
PTFE COATED ALUMINUM
DIAPHRAGMS
VALVE BALLS
AIR VALVE
CENTER BLOCK
AIR CHAMBERS
WETTED PARTS & OUTER PISTON
DIAPHRAGMS
BNS = BUNA-N (Red Dot)
BNU = BUNA-N, ULTRA FLEX™
EPS = EPDM (Blue Dot)
EPU = EPDM, ULTRA FLEX™
FSS = SANIFLEX™
[Hytrel® (Cream)]
NES = NEOPRENE (Green
Dot)
NEU = NEOPRENE, ULTRA FLEX™
PUS = POLYURETHANE
(Clear)
TEU = PTFE W/EPDM
BACK-UP (White)
TNU = PTFE W/NEOPRENE
BACK-UP (White)
VTS = VITON® (White Dot)
VTU = VITON®, ULTRA FLEX™
WFS = WIL-FLEX™
[Santoprene®
(Orange Dot)]
O-RINGS
VALVE SEAT
VALVE BALL
SPECIALTY
CODE
(if applicable)
BN = BUNA-N (Red Dot)
EP = EPDM (Blue Dot)
NE = NEOPRENE (Green
Dot)
PU = POLYURETHANE
(Brown)
TF = PTFE (White)
VT = VITON® (White Dot)
WF = WIL-FLEX™
[Santoprene® (Orange
Dot)]
VALVE SEAT
K = PVDF
P = POLYPROPYLENE
VALVE SEAT O-RING
BN = BUNA-N (Red Dot)
PU = POLYURETHANE
(Brown)
TV = PTFE ENCAP. VITON
WF = WIL-FLEX™
[Santoprene® (Orange
Dot)]
®
SPECIALTY CODES
0100 Wil-Gard II™ 110V
0102 Wil-Gard II™, sensor wires ONLY
0103 Wil-Gard II™ 220V
0206 PFA coated hardware,
Wil-Gard II™ sensor wires only
0502 PFA coated hardware
NOTE: MOST ELASTOMERIC MATERIALS USE COLORED DOTS FOR INDENTIFICATION.
®
is a registered trademark of Solvay.
Halar
Viton® is a registered trademark of DuPont Dow Elastomers.
WILDEN PUMP & ENGINEERING, LLC 2 WIL-10131-E-01
0513 SS outer pistons
0560 Split manifold
0561 Split manifold, PFA coated
hardware
0563 Split manifold, discharge only
0564 Split manifold, inlet only
0608 PFA coated hardware, Wil-
Gard II™ 220V
0660 Split manifold, Wil-Gard II™ 110V
0661 Split manifold, PFA coated
hardware, Wil-Gard II™ 110V
Section 3
HOW IT WORKS
The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show flow pattern
through the pump upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke.
RIGHT STROKE MID STROKE LEFT STROKE
FIGURE 1 The air valve directs pressurized air to the back
side of diaphragm A. The compressed air is applied directly
to the liquid column separated by elastomeric diaphragms.
The diaphragm acts as a separation membrane between the
compressed air and liquid, balancing the load and removing
mechanical stress from the diaphragm. The compressed air
moves the diaphragm away from the center block of the
pump. The opposite diaphragm is pulled in by the shaft
connected to the pressurized diaphragm. Diaphragm B is on
its suction stroke; air behind the diaphragm has been forced
out to the atmosphere through the exhaust port of the pump.
The movement of diaphragm B toward the center block of
the pump creates a vacuum within chamber B. Atmospheric
pressure forces fluid into the inlet manifold forcing the inlet
valve ball off its seat. Liquid is free to move past the inlet
valve ball and fill the liquid chamber (see shaded area).
FIGURE 2 When the pressurized diaphragm, diaphragm
A, reaches the limit of its discharge stroke, the air valve
redirects pressurized air to the back side of diaphragm
B. The pressurized air forces diaphragm B away from the
center block while pulling diaphragm A to the center block.
Diaphragm B is now on its discharge stroke. Diaphragm B
forces the inlet valve ball onto its seat due to the hydraulic
forces developed in the liquid chamber and manifold of the
pump. These same hydraulic forces lift the discharge valve
ball off its seat, while the opposite discharge valve ball is
forced onto its seat, forcing fluid to flow through the pump
discharge. The movement of diaphragm A toward the center
block of the pump creates a vacuum within liquid chamber
A. Atmospheric pressure forces fluid into the inlet manifold
of the pump. The inlet valve ball is forced off its seat allowing
the fluid being pumped to fill the liquid chamber.
FIGURE 3 At completion of the stroke, the air valve again
redirects air to the back side of diaphragm A, which starts
diaphragm B on its exhaust stroke. As the pump reaches
its original starting point, each diaphragm has gone through
one exhaust and one discharge stroke. This constitutes
one complete pumping cycle. The pump may take several
cycles to completely prime depending on the conditions of
the application.
HOW IT WORKS—AIR DISTRIBUTION SYSTEM
The Pro-Flo® patented air distribution
system incorporates three moving parts:
the air valve spool, the pilot spool, and the
main shaft/diaphragm assembly. The heart
of the system is the air valve spool and
air valve. As shown in Figure 1, this valve
design incorporates an unbalanced spool.
The smaller end of the spool is pressurized continuously, while the large end is
alternately pressurized and exhausted to
move the spool. The spool directs pressurized air to one chamber while exhausting
the other. The air causes the main shaft/
diaphragm assembly to shift to one side
— discharging liquid on one side and
pulling liquid in on the other side. When
the shaft reaches the end of its stroke, it
Figure 1
WIL-10131-E-01 3 WILDEN PUMP & ENGINEERING, LLC
actuates the pilot spool, which pressurizes and exhausts the large end of the
air valve spool. The pump then changes
direction and the same process occurs in
the opposite direction, thus reciprocating
the pump.
Section 4
DIMENSIONAL DRAWINGS
P8 Plastic
DIMENSIONS
ITEM METRIC (mm) STANDARD (inch)
A 490 19.3
B 76 3.0
C 414 16.3
D 693 27.3
E 770 30.3
F 89 3.5
G 417 16.4
H 333 13.1
J 381 15.0
K 307 12.1
L 227 8.9
M 254 10.0
N 15 0.6
METRIC (mm) STANDARD (inch)
P 122 DIA. 4.8 DIA.
R 152 DIA. 6.0 DIA.
S 20 DIA.
0.8 DIA.
PX8 Plastic
DIMENSIONS
ITEM METRIC (mm) STANDARD (inch)
A 490 19.3
B 76 3.0
C 414 16.3
D 693 27.3
E 770 30.3
F 89 3.5
G 422 16.6
H 173 6.8
J 356 14.0
K 447 17.6
L 381 15.0
M 307 12.1
N 227 8.9
P 254 10.0
R15 .6
DIN/ANSI COMBO
S 122 DIA. 4.8 DIA.
T 155 DIA. 6.1 DIA.
U 20 DIA. .8 DIA.
WILDEN PUMP & ENGINEERING, LLC 4 WIL-10131-E-01
Section 5A
PERFORMANCE
P8 PLASTIC
RUBBER-FITTED
Height .................................. 770 mm (30.3")
Width ................................... 490 mm (19.3")
Depth ..................................333 mm (13.1")
Est. Ship Weight ......
Air Inlet .................................... 13 mm (1/2")
Inlet ............................................ 51 mm (2")
Outlet .........................................51 mm (2")
Suction Lift ........................... 7.0 m Dry (23')
Displacement per
Stroke ......................... 2.91 l (0.77 gal.)
Max. Flow Rate ............... 587 lpm (155 gpm)
Max. Size Solids .....................6.4 mm (1/4")
1
Displacement per stroke was calculated at 4.8 bar
(70 psig) air inlet pressure against a 2 bar (30 psig)
head pressure.
Example: To pump 291.5 lpm (77 gpm)
against a discharge pressure head of 2.0 bar
(30 psig) requires 4.1 bar (60 psig) and 68
3
Nm
/h (40 scfm ) air consumption. (See dot
on chart.)
Caution: Do not exceed 8.6 bar (125 psig) air
supply pressure.
Polypropylene
34 kg (75 lbs)
PVDF
43 kg (95 lbs)
9.45 m Wet (31')
1
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation parameters
will fall in the center of the pump performance curve.
P8 PLASTIC
TPE-FITTED
Height .................................. 770 mm (30.3")
Width ................................... 490 mm (19.3")
Depth ..................................333 mm (13.1")
Est. Ship Weight ......
Air Inlet .................................... 13 mm (1/2")
Inlet ............................................ 51 mm (2")
Outlet .........................................51 mm (2")
Suction Lift ......................... 5.18 m Dry (17')
Displacement per
Stroke .......................... 2.91 l (0.77 gal.)
Max. Flow Rate ............... 575 lpm (152 gpm)
Max. Size Solids .....................6.4 mm (1/4")
1
Displacement per stroke was calculated at 4.8 bar
(70 psig) air inlet pressure against a 2 bar (30 psig)
head pressure.
Example: To pump 283.9 lpm (75 gpm)
against a discharge pressure head of 2.1
bar (30 psig) requires 4.1 bar (60 psig) and
3
76.5 Nm
/h (45 scfm) air consumption. (See
dot on chart.)
Caution: Do not exceed 8.6 bar (125 psig ) air
supply pressure.
Polypropylene
34 kg (75 lbs)
PVDF
43 kg (95 lbs)
9.45 m Wet (31')
1
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation parameters
will fall in the center of the pump performance curve.
WIL-10131-E-01 5 WILDEN PUMP & ENGINEERING, LLC
PERFORMANCE
P8 PLASTIC
PTFE-FITTED
Height .................................. 770 mm (30.3")
Width ................................... 490 mm (19.3")
Depth ..................................333 mm (13.1")
Est. Ship Weight ......
Air Inlet .................................... 13 mm (1/2")
Inlet ............................................ 51 mm (2")
Outlet .........................................51 mm (2")
Suction Lift ......................... 4.27 m Dry (14')
Displacement per
Stroke ...........................0.53 l (0.47 gal.)
Max. Flow Rate ............... 481 lpm (127 gpm)
Max. Size Solids .....................6.4 mm (1/4")
1
Displacement per stroke was calculated at 4.8 bar
(70 psig) air inlet pressure against a 2 bar (30 psig)
head pressure.
Example: To pump 238.5 lpm (63 gpm)
against a discharge pressure head of 2.0 bar
(30 psig) requires 4.1 bar (60 psig) and 45
3
Nm
/h (55 scfm) air consumption. (See dot
on chart.)
Caution: Do not exceed 8.6 bar (125 psig) air
supply pressure.
Polypropylene
34 kg (75 lbs)
PVDF
43 kg (95 lbs)
9.45 m Wet (31')
1
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation parameters
will fall in the center of the pump performance curve.
P8 PLASTIC
ULTRA-FLEX
Height .................................. 770 mm (30.3")
Width ................................... 490 mm (19.3")
Depth ..................................333 mm (13.1")
Est. Ship Weight ......
Air Inlet .................................... 13 mm (1/2")
Inlet ............................................ 51 mm (2")
Outlet .........................................51 mm (2")
Suction Lift ......................... 4.88 m Dry (16')
Displacement per
Stroke ......................... 2.12 l (0.56 gal.)
Max. Flow Rate ............... 560 lpm (148 gpm)
Max. Size Solids .....................6.4 mm (1/4")
1
Displacement per stroke was calculated at 4.8 bar
(70 psig) air inlet pressure against a 2 bar (30 psig)
head pressure.
Example: To pump 257.4 lpm (68 gpm)
against a discharge pressure head of 2.0
bar (30 psig) requires 4.1 bar (60 psig) and
3
76.5 Nm
dot on chart.)
Caution: Do not exceed 8.6 bar (125 psig) air
supply pressure.
/h (45 scfm) air consumption. (See
TM
-FITTED
Polypropylene
34 kg (75 lbs)
PVDF
43 kg (95 lbs)
8.84 m Wet (29')
1
[LPM]
Water Discharge Flow Rates
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation parameters
will fall in the center of the pump performance curve.
WILDEN PUMP & ENGINEERING, LLC 6 WIL-10131-E-01
Section 5B
SUCTION LIFT CURVES
P8 PLASTIC
SUCTION LIFT
CAPABILITY
PTFE Diaphragms
WIL-10131-E-01 7 WILDEN PUMP & ENGINEERING, LLC
NOTES
WILDEN PUMP & ENGINEERING, LLC 8 WIL-10131-E-01
PX8
P L A S T I C
PX8 PLASTIC PERFORMANCE
Section 5B
Pro-Flo X
The Pro-Flo X™ air distribution system with the
revolutionary Effi ciency Management System (EMS)
offers fl exibility never before seen in the world of
AODD pumps. The
patent-pending EMS
is simple and easy
to use. With the
turn of an integrated
TM
Operating Principal
control dial, the operator can select the optimal
balance of fl ow and effi ciency that best meets the
application needs. Pro-Flo X™ provides higher
performance, lower
operational costs
and fl exibility that
exceeds previous
industry standards.
AIR CONSUMPTION
$
$
$
Turning the dial
changes the
relationship
between air inlet
and exhaust
porting.
WILDEN PUMP & ENGINEERING, LLC 10 PX8 Plastic Performance
Each dial setting
represents an
entirely different
fl ow curve
Pro-Flo X™ pumps
are shipped from
the factory on
setting 4, which
is the highest
fl ow rate setting
possible
Moving the dial
from setting 4
causes a decrease
in fl ow and an even
greater decrease in
air consumption.
When the air
consumption
decreases more
than the fl ow
rate, effi ciency
is improved and
operating costs
are reduced.
Example 1
HOW TO USE THIS EMS CURVE
SETTING 4 PERFORMANCE CURVE
Figure 1 Figure 2
Example data point = Example data point =
This is an example showing how to determine fl ow rate and
air consumption for your Pro-Flo X™ pump using the Effi ciency Management System (EMS) curve and the performance
curve. For this example we will be using 4.1 bar (60 psig) inlet
air pressure and 2.8 bar (40 psig) discharge pressure and EMS
setting 2.
Step 1:
Identifying performance at setting 4. Locate
the curve that represents the fl ow rate of the
pump with 4.1 bar (60 psig) air inlet pressure.
Mark the point where this curve crosses the
horizontal line representing 2.8 bar (40 psig)
discharge pressure. (Figure 1). After locating
your performance point on the fl ow curve,
draw a vertical line downward until reaching
the bottom scale on the chart. Identify the fl ow
rate (in this case, 8.2 gpm). Observe location
of performance point relative to air consumption curves and approximate air consumption
value (in this case, 9.8 scfm).
8.2
GPM
curve, draw vertical lines downward until
reaching the bottom scale on the chart. This
identifi es the fl ow X Factor (in this case, 0.58)
and air X Factor (in this case, 0.48).
Step 3:
Calculating performance for specific EMS
setting. Multiply the fl ow rate (8.2 gpm)
obtained in Step 1 by the fl ow X Factor multiplier (0.58) in Step 2 to determine the fl ow rate
at EMS setting 2. Multiply the air consumption (9.8 scfm) obtained in Step 1 by the air
X Factor multiplier (0.48) in Step 2 to determine the air consumption at EMS setting 2
(Figure 3).
gpm
8.2
.58
gpm
4.8
0.58
0.48
(fl ow rate for Setting 4)
(Flow X Factor setting 2)
(Flow rate for setting 2)
EMS CURVE
fl ow multiplier
air multiplier
Step 2:
Determining flow and air X Factors. Locate
your discharge pressure (40 psig) on the vertical axis of the EMS curve (Figure 2). Follow
along the 2.8 bar (40 psig) horizontal line until
intersecting both fl ow and air curves for your
desired EMS setting (in this case, setting 2).
Mark the points where the EMS curves intersect the horizontal discharge pressure line.
After locating your EMS points on the EMS
PX8 Plastic Performance 11 WILDEN PUMP & ENGINEERING, LLC
Figure 3
The fl ow rate and air consumption at Setting
2 are found to be 18.2 lpm (4.8 gpm) and 7.9
Nm3/h (4.7 scfm) respectively.
9.8
.48
4.7
scfm
(air consumption for setting 4)
(Air X Factor setting 2)
scfm
(air consumption for setting 2)
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