ESPA™ membranes can be operated at low pressure, thus reducing the high energy-consuming RO operating pressure in water treatment facilities. ESPA™ membranes produce high quality water and save energy costs in a variety of water treatment applications, including the generation of potable and industrial process water, sewage treatment, and treatment of industrial wastewater recovery and reuse.

Membrane Type	Size	Feature
ESPA2-LD	8-inch	The membrane has high salt rejection and low pressure operation, and the thicker feed spacer (34 mils) improves resistance to suspended solids in the feed water. This reduces cleaning frequency and treatment costs.
ESPA2-LD-4040	4-inch	Small 4-inch type of ESPA2-LD
ESPA2 MAX＊	8-inch	ESPA2 series with high membrane area (440ft) enable high permeate volume. Suitable for treatment of feed water with low suspended solids.
ESPA2-LD MAX	8-inch	Nitto/HY's proprietary technology allows for a thicker feed spacer while achieving a high membrane area. This product enables high permeation rate while improving resistance to suspended solids in feed water.
ESPA4-LD＊	8-inch	This product enables operation at even lower pressure than the ESPA2 series. In addition, the thicker feed spacer (34 mil) improves resistance to suspended solids in the feed water. This reduces cleaning frequency and treatment costs.
ESPA4-LD-4040	4-inch	Small 4-inch type of ESPA4-LD