Double Diaphragm Pump On Hot Wax Application

After replacing their older style 'figure of eight' AODP which regularly failed, with Flotronic 'One Nut' pumps, they have almost forgotten they are there. The Flotronic Air-Operated Double-Diaphragm pumps have been so reliable on the hot wax products that they have needed minimal attention since first being installed in 1998.

Polymer system specialties business, combining specialty, surfactant and monomer and anti-foam agent technologies to improve the performance, quality and process efficiency for polymer and resin manufacturers.

The two 710 series 316L stainless steel Air-Operated Double-Diaphragm pumps from FPL are utilized in their anionics plant for the transfer of ethyl epoxalate and non-ethyl epoxalate waxes from 200 kg drums into their reactors.

They have a suction lift of 1 metre and the thick waxes are kept at between 60-80°C, otherwise they will set and are pumped to a head of 5 metres to the reactors. Each pump has an integral steam jacket to ensure the wax stays hot and because of the 'inside out' design the Flotronic double diaphragm pump is ideally suited.

"Compared to the previous pumps," comments the engineering manager, "we hardly know the pumps are there. We were regularly having breakdowns with the old pumps, but the Flotronic diaphragm pumps have been no trouble at all. And if for any reason the wax does set-off in the pumps, then they are so easy to strip."

All Flotronic double diaphragm pumps are of the unique 'One Nut' fast maintenance design where a diaphragm change can be made in less than 10 minutes by the removal of just one nut. Several other FPL pumps are in use around the site in the NE of England handling potassium hydroxide, EDTA and various chemicals. As their older pumps fail they replace them with the latest technology 'One Nut' diaphragm pumps from Flotronic.


  • Ethyl Epoxalate Waxes
  • Temperature 60-80° C
  • Suction lift up to 1 M
  • Discharge up to 5 M head


  • 1½" 710 Series 316 Stainless Steel
  • BSP Connections
  • PTFE elastomers
  • Integral Steam Jackets
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