The air-operated diaphragm pumps RFM are almost completely diffusion resistant due to the thick-surface structure. Available are versions with flap valve and FDA certified.
For delivery rates up to 7 GPM (30 l/min)
For delivery rates up to 11 GPM (45 l/min)
For delivery rates up to 29 GPM (110 l/min)
For delivery rates up to 99 GPM (375 l/min)