Aluminum Diaphragm Paint Pump Air Operated Double Diaphragm Pump Powder Conveying

Air operated double diaphragm pumps

Advantages Double Diaphragm Pumps

• Simple by design; highly interchangeable and less maintenance and therefore reduced life time costs.
• Easy to use; flow can be achieved on demand and altered by simple air or fluid regulation.
• Displacement per stroke is high; this substantially increases the life of the pump, reducing the maintenance and lifetime costs.

About AODD PUMP

If you're looking for a single pump that can be used in a wide variety of applications, you want an air-operated double diaphragm (AODD) pump. JBSL provides the most complete line of AODD pumps available from one source. No other manufacturer offers more AODD pumps – or more size and flow options – that meet every sanitary standard, including FDA, USDA, 3A and EHEDG.

WHY AODD

Air-operated double diaphragm (AODD) pumps offer a number of advantages that make them perfect for an almost endless variety of uses. AODD pumps:

• Can easily and efficiently handle anything from water to 90% solids
• Offer the ability to vary flow and discharge pressure up to 125 psi with a simple adjustment of the air supply
• Enable one pump to be used for numerous applications, eliminating the need for expensive motor drives and critical sizing calculations
• Can pass even large, shear-sensitive solids without degradation or heat buildup transferred to pumped medium
• Are able to run dry without damage to pump
• Can operate "on demand systems" without expensive pressure relief and bypass accessories
• Will not froth or separate medium
• Are capable of pumping as slow as one gallon per minute

Working principle JBSL double diaphragm pump​

• The JBSL diaphragm pump is an air-operated, positive displacement, self priming pump. The drawings show the flow pattern through the pump upon its initial stroke. It is assumed the pump has not been primed prior to its initial stroke.
  
  A. The air valve directs pressurized air to the back side of diaphragm 1. The diaphragm acts as a separation membrane between the compressed air and the liquid. 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 2 is now on its air exhaust stroke; air behind the diaphragm has been forced out to the atmosphere through the exhaust port of the pump. The movement of Diaphragm 2 toward the center block of the pump creates a vacuum within chamber 2. Atmospheric pressure forces fluid into the inlet manifold forcing the inlet ball valves off its seat. Liquid is free to move past the inlet ball valves and fill the liquid chamber.
  
  B. When the pressurized diaphragm, diaphragm 1 reaches the limit of its discharge stroke, the air valve redirects pressurized air to the back side of diaphragm 2. The pressurized air forces diaphragm 2 away from the center block while pulling diaphragm 1 to the centre block. Diaphragm 2 forces the inlet ball valves onto its seat due to the hydraulic forces developed. These same hydraulic forces lift the discharge ball valves off its seat, while the opposite discharge ball valves is forced onto its seat, forcing fluid to flow through the pump discharge. The movement of diaphragm 1 to the center block of the pump creates a vacuum within the liquid chamber 1. Atmospheric pressure forces fluid into the inlet manifold of the pump. The inlet ball valves is forced off its seat allowing the fluid being transferred to fill the liquid chamber.

• C. Upon completion of the stroke, the air valve again redirects air to the back side of diaphragm 1, and starts diaphragm 2 on its air exhaust stroke.
  
  Diaphragms are pressure-balanced to ensure longer life. High-pressure, high efficiency operation is achieved by the pump’s unique design. Suction and discharge valves can be either ball valve or cylindrical valve