The installation of a Yamada high pressure pump is the same as a standard Yamada Air-Operated Double Diaphragm pump. The bottom port is the liquid suction; the top port is the liquid discharge, etc. The main difference is the pumps ability to generate twice as much discharge pressure as air pressure, a 2 to 1 ratio.
If using hose or light duty piping on the discharge of a high pressure pump, you must make sure that it will be able to stand up to the higher discharge pressure. High pressure pumps will generate more pulsation than a standard AODD pump. With this in mind it is recommended that a suction stabilizer and a pulsation dampener be used with any high pressure pump.
The sizing of a pulsation dampener for a high pressure diaphragm pump is different from a standard AODD pump due to the fact that a high pressure pump is a simplex pump, rather than a duplex pump. The working volume of a pulsation dampener for a high pressure pump should be 5-10 times the working volume of the pump. When using a high pressure pump, you cannot use an automatic dampener. You will need to use a manually adjustable or chargeable dampener on the discharge side and chargeable only on the suction side of the pump. In place of a pulsation dampener, a stand pipe may be used. Consult Yamada for help in selecting the proper dampener.
High pressure pumps are available in metal only.
These pumps are available in the NDP-20 (3/4”) series size and larger. PTFE diaphragms are not available in the high pressure pumps and a shortened diaphragm life should be expected. For questions or technical assistance, please contact Yamada.