FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media

For extreme pumping temperatures

Efficiency even at extreme pumping temperatures

In terms of pumping temperature the modular system of double hose-diaphragm pumps includes a great variety of options:

Designs with ribbed casing area (convector)

  • Designs with cooling or heating jacket
  • Designs with double hose-diaphragms and additional flat diaphragm

Generally, elastomer hose-diaphragms are applied for temperatures up to 130 °C. For higher pumping temperatures of < 200 °C the use of PTFE mixtures has proven successful. These have especially been developed for the utilization with hose-diaphragm pumps and are likewise specified to handle conveyed fluids of particularly high corrosiveness.

To master extreme pumping temperatures of ≥ 200 °C, double hose-diaphragm pumps are provided with a convector face between wet and drive end. This intermediate piece contributes to efficient heat dissipation.

Some fluids require a minimum temperature to remain capable of flowing. If this temperature is undercut, such fluids become very viscous, solid or are even subject to sulphuring. In order to ensure that the conveyed fluid remains pumpable, the hose-diaphragm casings and optionally also the valve casings and connecting flanges are provided with a heating jacket. If steam is used for heating, proper condensate conduction must be ensured.

MULTISAFE® pumpe with ribbed casing area (convector).
MULTISAFE® pump with cooling or heating jacket (convector).



Variants with double redundant diaphgragms

The combination of a double hose-diaphragm and flat diaphragm represents a further option for extreme pumping temperatures and/or high suction pressures.

MULTISAFE® pump with double hose-diaphragms made of special PTFE and additional flat diaphragm for extreme pumping temperatures and/or high suction pressure.