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5

R. 09/20  855 867

 SAMOA Industrial, S.A. · Pol. Ind. Porceyo,  I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com

2020_09_24-12:30

EN

This pump is self-priming. 
To prime it the first time, you must connect the air pump supply to a low pressure using the pressure regulators while keeping the outlet valve open.
When fluid begins to flow from the pump outlet, the pump is primed. For regulation of fluid pressure, the unit must be supplied with an air pressure between 
22 and 115 psi (1,5 and 8 bar), Hytrel

®

 and Santoprene

®

  betwween 36 and 115 psi (2,5 and 8 bar). Adjust the discharge valve on the discharge side to 

control flow. For the performance characteristics of the pump see the capacity curve shown on page 6.

To ensure that the air supply is sufficient to meet the demand of the pump, 
the diameter of the pipe must be equal to the diameter of the supply port of 
the pump. Choose auxiliary air treatment equipment and fittings with 
sufficient airflow to exceed the air consumption of the pump. In addition, 

peripheral air treatment equipment must be installed as close as possible to 
the pump unit.
The use of a coupler to connect the hoses aids future operation and 
maintenance tasks.

•  Close the inlet valve of the pump.
•  Open the air valve of the pump, turn on the pump and flush the remaining fluid.
•  Close the discharge valve on the discharge side, then begin to slowly open the drain valve and discharge pressure fluid.
•  After ensuring that the pump was turned off and the pressure was released, fully open and close the regulator valve and drain valve of the pump.

•  When installing the pump, be sure to perform grounding in the specified 

location.

•  Also connect ground wires for the auxiliary equipment and piping.
•  Use a grounding cable of at least 12 gauge (2.0 mm

2

).

STICKER THAT SHOWS 
THE POSITION OF THE 
GROUND WIRE

WARNING: Connect grounding wires to the pump, piping and all other equipment too.
When the pump operates ungrounded or with an incorrect connection, friction between parts and abrasion caused by some fluids that flow 
inside the pump, can generate static electricity. Moreover, according to the type of fluid pump and the installation environment (such as gases 
in the air or the type of the surrounding facilities) static electricity can cause fire or electric shock.

INSTALLATION

WARNING

AIR CONNECTION

OPERATING INSTRUCTIONS

STOPPING THE PUMP

GROUNDING THE PUMP

Summary of Contents for DF50

Page 1: ...ial S A Pol Ind Porceyo I 14 Camino del Font n 831 33392 Gij n Spain Tel 34 985 381 488 www samoaindustrial com Parts and technical service guide Part No DF50 552 051 1 2 DOUBLE DIAPHRAGM PUMP DF50 50...

Page 2: ...m 105 mm 122 mm 8 mm 146 mm 140 mm 70 mm 1 2 BSP NPT 148 mm 3 8 BSP NPSM Nl min SCFM 200 250 350 300 400 150 100 50 0 bar psi 1 14 5 2 29 3 43 5 4 58 5 72 5 6 87 7 8 100 126 0 0 0 2 64 5 28 7 93 10 57...

Page 3: ...pills For pumps handling hazardous fluids that are a danger to humans or to the environment install a suitable container surrounding the pump to prevent any leaks or spills Ensure that the operators o...

Page 4: ...with viscous fluids Not recommended for hazardous fluids SELF PRIMING Pump is designed to generate vacuum It is possible to evacuate all the air from a hose or pipe without damaging the pump Maximum s...

Page 5: ...s possible to the pump unit The use of a coupler to connect the hoses aids future operation and maintenance tasks Close the inlet valve of the pump Open the air valve of the pump turn on the pump and...

Page 6: ...phragm and place the new one in the proper position 7 Mount the side covers again following the tightening sequence and torque indicated in the Exploded parts and spare parts of the pump section Remov...

Page 7: ...of the pump section 6 Assemble the directional valve with being careful not to damage the O rings and tighten the screws with a maximum torque of 44 25 lbf in 5 N m ATTENTION To avoid fluid restricti...

Page 8: ...d 5 32 DIAPHRAGM COVERS Diaphragm and central pushing rod Flanged hex head screw M6 Socket wrench Metric 10 mm Further maintenance Air Sensors will require an Allen wrench Metric 3 mm METALLIC PUMPS O...

Page 9: ...side Cavitation occurs Adjust air supply pressure and discharge pressure and reduce the suction Vibrations Adjust air supply pressure and discharge pressure Reduce the flow of the inlet valve to adjus...

Page 10: ...10 855 867 R 09 20 SAMOA Industrial S A Pol Ind Porceyo I 14 Camino del Font n 831 33392 Gij n Spain Tel 34 985 381 488 www samoaindustrial com 2020_09_24 12 30 EN NOTES...

Page 11: ...11 R 09 20 855 867 SAMOA Industrial S A Pol Ind Porceyo I 14 Camino del Font n 831 33392 Gij n Spain Tel 34 985 381 488 www samoaindustrial com 2020_09_24 12 30 EN NOTES...

Page 12: ...A Pol Ind Porceyo I 14 Camino del Font n 831 33392 Gij n Spain declares that this product DF50 552 051 conforms with the EU Directive 2006 42 EC EN For SAMOA INDUSTRIAL S A Pedro E Prallong lvarez Pr...

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