Wilden PX4 series, Engineering, Operation & Maintenance

P E R F O R M A N C E

WILDEN PUMP & ENGINEERING, LLC 

12 

PX8 HS

 Performance

SET

TING 4 PERFORMANCE CUR

VE

EMS CUR

VE

PX8 S

ANIFL

O HS FULL S

TROKE RUBBER-FITTED

TECHNIC

AL D

A

T

A

Height 

 . . . . . . . . . . . . . . . . . . . . . . . . . 

1008 mm (39.7”)

Width

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

460 mm (18.1”)

Depth

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

498 mm (19.6”)

Ship W

eight 

 . . . . . . . . . . . . . . . . . . . . . 

49 kg (109 lbs.)

Air Inlet

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

19 mm (3/4”)

Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51 mm (2”) 

Outlet

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51 mm (2”)

Suction Lift

. . . . . . . . . . . . . . . . . . . . . 

5.3 m Dry (17.3’)

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.0 m W

et (29.5’)

Disp. Per Stroke

. . . . . . . . . . . . . . . . . . 

1.1 l (0.28 gal.)

1

Max. Flow Rate 

 . . . . . . . . . . . . . . . .

579 lpm (153 gpm)

Max. Size Solids 

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

   Mushroom V

alve 

 . . . . . . . . . . . . . . . . .

6.4 mm (1/4”)

   Ball V

alve

. . . . . . . . . . . . . . . . . . . . . . .

12.7 mm (1/2”)

   Flap V

alve (compressible solids)

. 

47.5 mm (1-7/8”)

Surface Finish 

 . . . . . . . . . . . . . . . . 

Ra 0.8 µm (32 µ-in)

1

Displacement per stroke was calculated at 4.8 bar (70 psig) 

air inlet pressure against a 2 bar (30 psig) head pressure.

The Effi

 ciency Management System (EMS) 

can be used to optimize the performance of 

your Wilden pump for specifi

 c applications. 

The pump is delivered with the EMS adjusted 

to setting 4, which allows maximum fl

 ow

. 

The EMS curve allows the pump user to deter

-

mine fl

 ow and air consumption at each EMS 

setting.  For any EMS setting and discharge 

pressure, the “X factor” is used as a multi-

plier with the original values from the setting 

4 performance curve to calculate the actual 

fl ow and air consumption values for that spe-

cifi

 c EMS setting.  Note: you can interpolate 

between the setting curves for operation at 

intermediate EMS settings 

EXAMPLE

A PX8 Sanifl

 o HS, full stroke Rubber

-fi

 tted pump operating at EMS 

setting 4, achieved a fl

 ow rate of 348 lpm (92 gpm) using 119 Nm

3

/h 

(70 scfm) of air when run at 5.5 bar (80 psig) air inlet pressure and 2.1 

bar (30 psig) discharge pressure (See dot on performance curve).

The end user did not require that much fl

 ow and wanted to reduce 

air consumption at his facility

.  He determined that EMS setting 2 

would meet his needs.  At 2.1 bar (30 psig) discharge pressure and 

EMS setting 2, the fl

 ow “X factor” is 0.74 and the air “X factor” is 

0.48 (see dots on EMS curve).  

Multiplying the original setting 4 values by the “X factors” provides 

the setting 2 fl

 ow rate of 258 lpm (68 gpm) and an air consumption 

of 57 Nm

3

/h  (34 scfm).  The fl

 ow rate was reduced by 26% while 

the air consumption was reduced by 52%, thus providing increased 

effi

 ciency

.

For a detailed example for how to set your EMS, see beginning of 

performance curve section.

Caution:  Do not exceed 8.6 bar (125 psig) air supply pressure.   

Flow rates indicated on chart were determined by pumping water with a vertically mounted, center ported ball check confi

 guratio

n. 

When alternate check valve options are used, multiply fl

 ow rate by appropriate factor: Flap check valve = 83%. For optimum life

 and 

performance, pumps should be specifi

 ed so that daily operation parameters fall in the center of the pump performance curve.