... .Easy to install, the pump is together with foot valve, injection valve and tubes for import and export.4.Aluminium body with ... the life span, the first layer is Teflon anti-acid diaphragm, the second is EPDM stretch rubber, the third is 3 ... chemicals, food industry, constructions industry, and etc.Measurements JLM Solenoid Diaphragm Metering Pump