ESPA membrane

There's an ESPA solution to fit even the most demanding water treatment needs now with greater performance, productivity and savings.

Hydranautics' newer ESPA-B membranes provide 8,600 gallons per day (32.6 m3/d) of flow at 99.2% nominal salt rejection and 96% boron rejection, the new ESPA-B (B for Boron Rejection) is the highest boron rejecting, low pressure element in the industry.

Hydranautics' ESPA4 low energy membrane delivers even greater productivity and rejection, now at operating pressures of less than 100 psi. Enjoy up to 250% greater productivity per membrane area compared with conventional polyamide membranes, at the lowest cost per gallon produced.

ESPA1, ESPA2, and ESPA3 have long been the industry leaders, with the highest productivity and rejection available, producing up to 14,000 GPD.

The growing family of ESPA (Energy-Saving Polyamide) RO membranes continue to meet the ever-increasing demands of the water treatment industry. Users worldwide have made ESPA their first choice for high productivity and salt rejection.

Provides a new option for communities where boron levels are naturally high or for manufacturers challenged by boron contamination issues

Highest productivity & rejection with next-generation performance

One of the industry's leading brackish water RO elements

Ideal for 2nd pass industrial applications

Offers the same rejection characteristics as ESPA2 but with even higher flow rates

ESPA2 combines high productivity, energy savings and less salt passage all in one element