Model    GPS420/430 Natural Gas Operated   
Wetted Housing    Aluminum, SS316   
Diaphragm TPE    Wil-Flex™(Santoprene)   
Diaphragm Teflon    PTFE   
Approx wg 420 Threaded AL    26    kg
Approx wg 430 Flanged AL    28    kg
Approx wg 420 Threaded SS    50    kg
Approx wg 430 Flanged SS    53    kg
Air Inlet    3/4"    Inch FNPT
Pump inlet    1 1/2"    Inch FNPT
Pump outlet    1 1/2"    Inch FNPT
Suction lift dry    4.5    M
Displacement per Stroke    0.9    Litre
Max Flow    460    LPM
Max Head    8.6    Bar
Max Size Solids    6.4    mm
The above pump flow base on Full-Stroke PTFE diaphragm