Pistons used for Air Operated Double Diaphragm Pumps
On an Air Operated Double Diaphragm pump the inner-and outer piston are there to connect both diaphragms, to the main shaft. From the first diaphragm pump design back in the 50-ties until today the same connection is still around. Diaphragms are in many cases connected with the shaft by means of inner and outer diaphragm plates (inner -and outer pistons).
Fitted to your Requirements
Since a few years we see an alternative connection between the shaft and the diaphragm. The inner-and outer diaphragm plates have been removed at some diaphragms. This results in an integrated piston diaphragm. This means that the inner-and outer diaphragm plate have been replaced by a plate that is positioned with a special manufacturing procedure inside the diaphragm. The shaft is connected directly onto this plate in the integrated diaphragm without the use of any additional plates. In this case no outer diaphragm plate is used which creates a benefit; a possible leak path between inner-outer diaphragm plate and diaphragm has been eliminated. It also means less replacement parts when servicing your double diaphragm pump.
The design, material and the size of the inner-and outer diaphragm plate used is pump size and OEM dependent. In most cases the used inner-and outer diaphragm plates are not interchangeable between two brands.
Every industry or solution has it own selection requirements if it comes to inner-and outer diaphragm plate material. They come in a variety of materials (availability may vary per manufacturer) and designs to meet specific application needs such as chemical compatibility, temperature, abrasion resistance, and certification requirements.
Most Common used Materials supplied by Thinqk Pump Parts:
Excellent choice for applications requiring the most versatile chemical resistance of the thermoplastic materials.
Color Code: white
Excellent choice for applications requiring the most versatile chemical resistance of the thermoplastic materials. No other solid thermoplastic material can approach the combined strength, working temperature, and chemical resistance characteristics of PVDF.
Color Code: white
Excellent choice because it is Strong and lighter weight compared to other metals. Aluminum has average chemical resistance and is popular in paint, oil, gas and mining.
Excellent chemical resistance and can be used for food processing applications because it’s easily cleaned and doesn’t corrode.
Can we help you?
For any questions on diaphragm plates to service your air operated double diaphragm pump your can contact our Team of professionals at Thinqk Pump Parts. We are more than happy to assist you with your Piston questions.
To reduce your downtime we stock most common inner-and outer diaphragm plates used by OEM in the Diaphragm Pump industry. Parts ship from our warehouse located in the Netherlands.
Thinqk Pistons Pump Parts, original quality at a better price.