Principle of pump opration
This ball type check vavle pump is powered by compressed air and is a 1:1 ratio design.
The inner side of one diaphragm chamber is alternately pressurized while simultaneously exhausting the other inner chamber.
This causes the diaphragms,which are connected by a common rod secured by plates to the centers of the diaphragms, to move in a reciprocating action.(As one diaphragm performs the discharge stroke the other diaphragm is pulled to pertormthe suction stroke in the opposite chamber. )
Air pressure is applied over the entire inner surface of the diaphragm while liquid is discharged from the opposite side of the diaphragm.
The diaphragm operates in a balanced condition during the discharge stroke which allows the pump to be operated at discharge heads over 200 feet (61 meters) of water.
For maximum diaphragm life,keep the pump as close to the liquid being pumped as possible.
Positive suction head in excess of 10 feet of liquid (3.048meters) may require a back pressure regulating device to maximize diaphragm life.
Alternate pressurizing and exhausting of the diaphragm chamber is performed by an externally mounted,pilot operated,four way spool type air distribution valve.
When the spool shifts to one end of the valve body,inlet pressure is applied to one diaphragm chamber and the other diaphragm chamber exhausts.
When the spool shifts to the opposite end of the valve body,the pressure to the chambers is reversed.
The air distribution valve spoolis moved by a internal pilot valve which alternately pressurizes one end of the air distrbution vavle spool while exhausting the other end.
The pilot valve is shifted at each end of the diaphragm strike when a actuator plunger is contacted by the diaphragm plate.
This actuator plunger then pushes the end of the pilot valve spool into positin to activate the air distribution valve.
The chambers are connected with manifolds with a suction and discharge check valve for each chamer,maintaining flow in one direction through the pump.
Installation and start-up
Locate the pump as close to th product being pumped as possible.
Keep the suction line length and number of fitting to a minimum.
Do not reduce the suction line diameter.
For installations of rigid piping,short sections of flexible hose should be installed between the pump and the piping.
The flexible hose reduces vibration and strain to the pumping system.
A surge suppressor is recommended to further reduce pulsation in flow.
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