Wilden PX8, PX15, PX4 Engineering, Operation & Maintenance

EOM

Engineering

Operation &

Maintenance

PX8

Sani o™ Hygienic Series
Metal Pumps

Where Innovation Flows

www.wildenpump.com

WIL-12310-E- 04

TO REPL ACE W IL-12310-E -0 3

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. PX8 Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Operating Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

How to Use this Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Rubber-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

TPE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Full Stroke PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Full Stroke SIPD-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Reduced Stroke PTFE-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Reduced Stroke SIPD-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Reduced Stroke Ultra-Flex™-Fitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

B. Suction Lift Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

SECTION 6 SUGGESTED INSTALLATION, OPERATION & TROUBLESHOOTING . . . . . . . 21

SECTION 7 ASSEMBLY / DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

SECTION 8 CLEANING - CIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

SECTION 9 EXPLODED VIEW & PARTS LISTING

PX8 Saniflo™ HS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

SECTION 10 ELASTOMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

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.
Pump is pre-lubed.

TEMPERATURE LIMITS:

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
Nordel
Viton® –40°C to 176.7°C –40°F to 350°F
Sanifl ex™ –28.9°C to 104.4°C –20°F to 220°F
Polytetrafl uoroethylene (PTFE)

4.4°C to 104.4°C 40°F to 220°F
Polyurethane –12.2°C to 65.6°C 10°F to 150°F
Tetra-Flex™ PTFE w/Neoprene Backed

4.4°C to 107.2°C 40°F to 225°F
Tetra-Flex™ PTFE w/Nordel® Backed

-10°C to 137°C 14°F to 280°F
Wil-Flex™ (Santoprene®)

-40°C to 107.2°C -40°F to 225°F

NOTE: Not all materials are available for all
models. Refer to Section 2 for material options
for your pump.

®

–51.1°C to 137.8°C –60°F to 280°F

CAUTION: Do not exceed 82°C (180°F) air inlet

temperature for Pro-Flo X™ models.

CAUTION: Pumps should be thoroughly fl ushed

before installing into process lines. FDA and
USDA approved pumps should be cleaned and/
or sanitized before being used.

CAUTION: Always wear safety glasses when

operating pump. If diaphragm rupture occurs,
material being pumped may be forced out air
exhaust.

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 fl uid
to fl ow 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 fi lter. A 5µ (micron)
air fi lter is recommended.

CAUTION: When choosing pump materials, be

sure to check the temperature limits for all wetted
components. Example: Viton® has a maximum
limit of 176.7°C (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 signifi cantly reduce maximum
safe operating temperatures. Consult Chemical
Resistance Guide (E4) for chemical compatibility
and temperature limits.

WARNING: Prevention of static sparking — If

static sparking occurs, fi re or explosion could
result. Pump, valves, and containers must be
grounded to a proper grounding point when
handling fl ammable fl uids and whenever
discharge of static electricity is a hazard.

CAUTION: Do not exceed 8.6 bar (125 psig) air

supply pressure.

CAUTION: The process fl uid and cleaning fl uids

must be chemically compatible with all wetted
pump components. Consult Chemical Resistance
Guide (E4).

NOTE: When installing PTFE diaphragms, it is

important to tighten outer pistons simultaneously
(t urning in opposite directions ) to ensure tight fi t.
(See torque specifi cations in Section 7.)

NOTE: Cast Iron PTFE-fi tted pumps come

standard from the factory with expanded PTFE
gaskets installed in the diaphragm bead of the
liquid chamber. 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: Pumps are available in both

submersible and non-submersible options. Do
not use non-submersible Pro-Flo X™ models in
submersible applications.

CAUTION: Tighten all hardware prior to installation.

WIL-12310-E-04 1 WILDEN PUMP & ENGINEERING, LLC

Section 2

WILDEN PUMP DESIGNATION SYSTEM

PX8 SANIFLO

™

HYGIENIC SERIES

51 mm (2") Pump
Maximum Flow Rate:
587 lpm (155 gpm)

LEGEND

PX8 / XXXXX / XXX / XX/ XX/ XXXX

MODEL

MATERIAL CODES

MODEL

PX8 = 51 mm (2")
XPX8 = 51 mm (2") ATEX

WETTED PARTS/
OUTER PISTON

SS = 316L STAINLESS STEEL
SZ = 316L STAINLESS STEEL/
NO PISTON

CENTER BLOCK

N = NICKEL PLATED ALUMINUM
S = 316 STAINLESS STEEL

AIR CHAMBERS

N = NICKEL PLATED ALUMINUM
S = 316 STAINLESS STEEL

AIR VALVE

N = NICKEL PLATED ALUMINUM
S = 316 STAINLESS STEEL

DIAPHRAGMS

VALVE OPTION

AIR VALVE

AIR CHAMBER

CENTER SECTION

WETTED PARTS & OUTER PIS TON

DIAPHRAGMS

BNU = ULTRA-FLEX™ BUNA
EPU = ULTRA-FLEX™ EPDM
FBS = SANITARY BUNA
(two yellow dots)
FES = SANITARY EPDM
(two blue dots)
FSS = SANIFLEX™
FWL = FULL STROKE SANITARY
WIL-FLEX™ IPD

1

1,3,4

FWS = SANITARY WIL-FLEX™
LEL = PTFE-EPDM BACKED
LAMINATE IPD

1,2,3,4,5

TEU = PTFE w/EPDM BACKUP
TSS = FULL STROKE PTFE

w/SANIFLEX™ BACK-UP
TSU = PTFE w/SANIFLEX™
BACK-UP

1,2,5

TWS = FULL STROKE PTFE

w/WIL-FLEX™ BACK-UP

GASKETS

SPECIALTY
CODE

(if applicable)

VALVE BALLS, FLAP VALVES,

1,5

MUSHROOM CHECK

1,5

1

1

FB = SANITARY BUNA
(red dot)
FE = SANITARY EPDM
(green dot)
FS = SANIFLEX™
FW = SANITARY WIL-FLEX™
SF = STAINLESS STEEL FLAP
TF = PTFE

1

TM = PTFE MUSHROOM
CHECK

1,2,5

MANIFOLD GASKET

FB = SANITARY BUNA-N

1,2

(red dot)

1,2,3,4

1,2

FE = SANITARY EPDM
(green dot)
FV = SANITARY VITON®

1,2

(one white/one
yellow dots)
TF = PTFE

1,2,3,4,5

1,3,4

1,3,4

1,3,4

1,3,4

1,5

1,3,4

1,3,4

1, 3, 4

NOTE:

1. Meets Requirements of FDA CFR21.177

2. Meets Requirements of USPClass VI

3. Required for EHEDG Certification

4. Required for 3-A Certification

5. Stainless flap valve not available with reduced stroke PTFE, reduced
stroke Ultra-Flex

TM

or reduced stroke Laminate IP diaphragms

SPECIALTY CODES

0770 SaniFlo HS
0771 SaniFlo HS, w /Swivel Stand
0772 SaniFlo HS, Wil-Gard 110V
0773 SaniFlo HS, Wil-Gard 22 0V
0774 HS, Wil-Gard 110V, w/Swivel Stand
0775 SaniFlo HS, Wil-Gard 220V, w/Swivel Stand
0778 SaniFlo HS, DIN Connection
0779 HS, w/Swivel Stand DIN Connection
0780 SaniFlo HS, Wil-Gard 110V DIN Connection

NOTE: MOST EL ASTOMERIC MATERIA LS USE COLORED DOTS FOR IDENTIFICATION.

®

Viton

is a registered trademark of DuPont Dow Elas tomers.

WILDEN PUMP & ENGINEERING, LLC 2 WIL-12310-E-04

0781 SaniFlo HS, Wil-Gard 22 0V DIN Connection
0782 SaniFlo HS, Wil-Gard 110V, w/Swivel St and DIN Connection
0783 SaniFlo HS, Wil-Gard 22 0V, w/Swivel S tand DIN Connection
0784 SaniFlo HS, SMS Connection
0785 SaniFlo HS, w/Swivel Stand SMS Connection
0786 SaniFlo HS, Wil-Gard 110V SMS Connection
0787 SaniFlo HS, Wil-Gard 22 0V SMS Connection
0788 SaniFlo HS, Wil-Gard 110V, w/Swivel St and SMS Connection
0789 SaniFlo HS, Wil-Gard 22 0V, w/Swivel S tand SMS Connection

Section 3

The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show fl ow pattern
through the pump upon its initial stroke. It is assumed the pump has no fl uid in it prior to its initial stroke.

CLOSED

OUTLET

BA

INLET

FIGURE 1 The air valve dir ects pre ssurized
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 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 atmosphere through the exhaust
port of the pump. The movement of
diaphragm B toward the center of the
pump creates a vacuum within chamber B.
Atmospheric pressure forces fl uid into
the inlet manifold forcing the inlet valve
ball off its seat. Liquid is free to move
past the inlet valve ball and fi ll the liquid
chamber (see shaded area).

HOW IT WORKS—PUMP

OPEN

OPEN

OUTLET

BA

CLOSEDOPEN

FIGURE 2 When the pressurized diaphragm,
diaphra gm A, re aches t he limit of it s disc harge
stroke, the air valve redirects pressurized
air to the back side of diaphragm B. T he
pressurized air forces diaphragm B away
from the center while pulling diaphragm A
to the center. 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 fl uid to fl ow through the pump
discharge. The movement of diaphragm A
toward the center of the pump creates a
vacuum within liquid chamber A. Atmos­pheric pressure forces fl uid into the inlet
manifold of the pump. The inlet valve ball
is forced off its seat allowing the fl uid being
pumped to fi ll the liquid chamber.

INLET

CLOSED

OPENCLOSED

CLOSED

OUTLET

OPEN

BA

INLET

FIGURE 3 At completion of the stroke,
the air valve again redirects air to the
back side of diaphragm A, which star ts
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.

CLOSEDOPEN

WIL-12310-E-04 3 WILDEN PUMP & ENGINEERING, LLC

Section 4

DIMENSIONAL DRAWINGS

PX8 Saniflo™ HS Fixed

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 460 18.1
B 213 8.4
C 577 22.7
D 902 35.5
E 955 37.6

F 51 2.0
G 579 22.8
H 363 14.3
J 559 22.0
K 46 1.8

L 401 15.8

M 351 13.8
N 318 12.5

P 356 14.0
R

ø10 ø0.4

Rev A

PX8 Saniflo™ HS Flap Valve Fixed

51 mm (2")

TRI-CLAMP

DISCHARGE

19 mm (3/4")
FNPT AIR
INLET

E

D

C

B

A

L

M

R

P

N

F

25 mm (1")
FNPT AIR
EXHAUST

51 mm
(2")
TRI­CLAMP
INLET

K

F

H

J

G

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 460 18.1
B 160 6.3
C 577 22.7
D 955 37.6
E 1008 39.7

F 51 2.0
G 579 22.8
H 363 14.3
J 559 22.0
K 56 2.2

L 401 15.8

M 351 13.8
N 318 12.5

P 356 14.0
R

ø10 ø0.4

Rev A

WILDEN PUMP & ENGINEERING, LLC 4 WIL-12310-E-04

Section 4

DIMENSIONAL DRAWINGS

PX8 Saniflo™ HS Swivel

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 460 18.1
B 247 9.7
C 612 24.1
D 938 36.9
E 989 38.9

F 51 2.0
G 615 24.2
H 498 19.6
J 693 27.3
K 46 1.8

L 401 15.8

M 351 13.8
N 394 15.5

P 432 17.0
R ø10 ø0.4

Rev B

PX8 Saniflo™ HS Flap Valve Swivel

DIMENSIONS

ITEM METRIC (mm) STANDARD (inch)

A 460 18.1
B 194 7.6
C 612 24.1
D 990 39.0
E 1042 41.0

F 51 2.0
G 615 24.2
H 498 19.6
J 693 27.3
K 56 2.2

L 401 15.8

M 351 13.8
N 394 15.5

P 432 17.0
R ø10 ø0.4

Rev B

WIL-12310-E-04 5 WILDEN PUMP & ENGINEERING, LLC

Pump Solids

Maximize Your Yield

Is your process limping along with a pump that wasn't

designed to transfer sanitary solids? Are your inspection,

cleaning, and maintenance costs too high? Are you looking

for a pump that is actually designed for your application?

Wilden has your answer. The Saniflo™ VC pump can trans-

fer your product without damage from bruising or shearing.

The pump is specifically designed to meet your performance

needs while minimizing cleaning and inspection time. Contact

us for a unique perspective and proven results. The Saniflo™

VC will handle any food product that you can dish out.

• 3 sizes available

• Solids passage to 152 mm (6")

• Stainless steel construction

• Only 2 moving parts

• Low liquid content requirement

• Complies with
USDA requirements

• Variable fl ow

• CE marked

• Low voltage directive by TÜV

• PED & machinery directive

WILDEN PUMP & ENGINEERING, LLC 6 WIL-12310-E-04

PX8

SANIFLO

PX8 SANIFLO HS PERFORMANCE

Section 5A

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 Principle

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 8 PX8 HS 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).

8.2

gpm

.58

4.8

gpm

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 HS Performance 9 WILDEN PUMP & ENGINEERING, LLC

9.8

scfm

(air consumption for setting 4)

.48

4.7

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.

(Air X Factor setting 2)

scfm

(air consumption for setting 2)

HOW TO USE THIS EMS CURVE

Example 2.1

SETTING 4 PERFORMANCE CURVE

Figure 4

Example data point =

This is an example showing how to determine the inlet air
pressure and the EMS setting for your Pro-Flo X™ pump to
optimize the pump for a specifi c application. For this exam­ple we will be using an application requirement of 18.9 lpm
(5 gpm) fl ow rate against 2.8 bar (40 psig) discharge pressure.
This example will illustrate how to calculate the air consump­tion that could be expected at this operational point.

10.2

gpm

DETERMINE EMS SETTING

Step 1

: Establish inlet air pressure. Higher air pres-

sures will typically allow the pump to run
more effi ciently, however, available plant air
pressure can vary greatly. If an operating
pressure of 6.9 bar (100 psig) is chosen when

EMS Flow

Settings 1 & 2

0.49

In our example it is 38.6 lpm (10.2 gpm). This

is the setting 4 fl ow rate. Observe the loca­tion of the performance point relative to air
consumption curves and approximate air
consumption value. In our example setting
4 air consumption is 24 Nm3/h (14 scfm).
See fi gure 4.

Step 3

: Determine flow X Factor. Divide the required

fl ow rate 18.9 lpm (5 gpm) by the setting 4 fl ow
rate 38.6 lpm (10.2 gpm) to determine the fl ow
X Factor for the application.

5

gpm / 10.2 gpm = 0.49 (flow X Factor)

EMS CURVE

Figure 5

fl ow multiplier

plant air frequently dips to 6.2 bar (90 psig)

Step 4

pump performance will vary. Choose an oper­ating pressure that is within your compressed
air system's capabilities. For this example we
will choose 4.1 bar (60 psig).

: Determine EMS setting from the flow

X Factor. Plot the point representing the fl ow

X Factor (0.49) and the application discharge
pressure 2.8 bar (40 psig) on the EMS curve.
This is done by following the horizontal 2.8

Step 2

: Determine performance point at setting 4. For

this example an inlet air pressure of 4.1 bar
(60 psig) inlet air pressure has been chosen.
Locate the curve that represents the perfor­mance of the pump with 4.1 bar (60 psig) inlet
air pressure. Mark the point where this curve
crosses the horizontal line representing 2.8
bar (40 psig) discharge pressure. After locat­ing this point on the fl ow curve, draw a verti­cal line downward until reaching the bottom
scale on the chart and identify the fl ow rate.

bar (40 psig) psig discharge pressure line until
it crosses the vertical 0.49 X Factor line. Typi­cally, this point lies between two fl ow EMS
setting curves (in this case, the point lies be­tween the fl ow curves for EMS setting 1 and

2). Observe the location of the point relative
to the two curves it lies between and approxi­mate the EMS setting (fi gure 5). For more pre­cise results you can mathematically interpo­late between the two curves to determine the
optimal EMS setting.

For this example the EMS setting is 1.8.

WILDEN PUMP & ENGINEERING, LLC 10 PX8 HS Performance

HOW TO USE THIS EMS CURVE

Example 2.2

SETTING 4 PERFORMANCE CURVE

Figure 6

Example data point =

10.2

gpm

Determine air consumption at a specific
EMS setting.

Step 1

: Determine air X Factor. In order to determine

the air X Factor, identify the two air EMS set­ting curves closest to the EMS setting estab­lished in example 2.1 (in this case, the point lies
between the air curves for EMS setting 1 and

2). The point representing your EMS setting
(1.8) must be approximated and plotted on the
EMS curve along the horizontal line represent­ing your discharge pressure (in this case, 40
psig). This air point is different than the fl ow
point plotted in example 2.1. After estimating
(or interpolating) this point on the curve, draw
a vertical line downward until reaching the
bottom scale on the chart and identify the air
X Factor (fi gure 7).

EMS CURVE

EMS Air

Settings 1 & 2

Figure 7

Example data point =

Step 2

: Determine air consumption. Multiply your

setting 4 air consumption (14 scfm) value by
the air X Factor obtained above (0.40) to deter­mine your actual air consumption.

1

4 scfm x 0.40 = 5.6 SCFM

In summary, for an application requiring 18.9 lpm
(5 gpm) against 2.8 bar (40 psig) discharge pressure,
the pump inlet air pressure should be set to 4.1 bar
(60 psig) and the EMS dial should be set to 1.8. The
pump would then consume 9.5 Nm3/h (5.6 scfm) of
compressed air.

0.40

air multiplier

For this example the air X Factor is 0.40

PX8 HS Performance 11 WILDEN PUMP & ENGINEERING, LLC