Brackish Water Energy Saving

ESPA1 Series Hydranautics RO Membrane Elements

High Productivity, energy saving reverse osmosis membranes.

Model No.	Size (Dia.”× Length”)	Flow Rate		Test Pressure (psi)	Nominal Salt Rejection (%)	Minimum Salt Rejection (%)
		gpd	m³/d
ESPA-2514	2.5” × 14”	250	0.9	150	99.4	98.0
ESPA-2521	2.5” × 21”	350	1.3	150	99.4	98.0
ESPA-2540	2.5” × 40”	750	2.8	150	99.4	98.0
ESPA-4014	4” × 14”	500	1.9	150	99.4	98.0
ESPA-4021	4” × 21”	1,000	3.8	150	99.4	98.0
ESPA1-LD-4040	4” × 40”	2,450	9.27	150	99.4	99.2
ESPA1	8” × 40”	12,000	45.4	150	99.3	99.0

ESPA2 Series Hydranautics RO Membrane Elements

ESPA2 product family offers new technology for higher productivity and rejection; minimizes bio-fouling & colloidal fouling and features and enhanced cleanability. The ESPA2 MAX features increased surface area for higher permeate production.

Model No.	Size (Dia.”× Length”)	Flow Rate		Test Pressure (psi)	Nominal Salt Rejection (%)	Minimum Salt Rejection (%)
		gpd	m³/d
ESPA2-LD-4040	4” × 40”	2,000	7.6	150	99.6	99.4
ESPA2	8” × 40”	9,000	34.1	150	99.6	99.5
ESPA2-LD	8” × 40”	10,000	37.9	150	99.6	99.5
ESPA2MAX	8” × 40”	12,000	45.4	150	99.6	99.5

ESPA3 Series Hydranautics RO Membrane Elements

ESPA3 Series membrane elements offer the highest product water flow rates of the Hydranautics ESPA family of membrane elements.

Model No.	Size (Dia.”× Length”)	Flow Rate		Test Pressure (psi)	Nominal Salt Rejection (%)	Minimum Salt Rejection (%)
		gpd	m³/d
ESPA3-4040	4” × 40”	3,000	11.4	150	98.5	98.0

ESPA4 Series Hydranautics RO Membrane Elements

ESPA 4 Series membrane elements feature a lower operating pressure, resulting in lower operating costs, while maintaining high productivity and a minimum salt rejection of 99%.

Model No.	Size (Dia.”× Length”)	Flow Rate		Test Pressure (psi)	Nominal Salt Rejection (%)	Minimum Salt Rejection (%)
		gpd	m³/d
ESPA4-LD-4040	4” × 40”	2,500	9.5	100	99.2	99.0
ESPA4	8” × 40”	12,000	45.4	100	99.2	99.0
ESPA4-LD	8” × 40”	12,000	45.4	100	99.2	99.0
ESPA4MAX	8” × 40”	13,200	50.0	100	99.2	99.0

ESPAB Series Boron Removal Hydranautics RO Membrane Elements

ESPA B boron removing elements provide a new option for communities where boron levels are naturally high or for manufacturers challenged by boron contamination issues.

Model No.	Size (Dia.”× Length”)	Flow Rate		Test Pressure (psi)	Salt Rejection (%)		Ave. Boron Rej. (%@10psi)
		gpd	m³/d		Nominal	Minimum
ESPABMAX	8” × 40”	9,000	34.1	150	99.3	99	99.6

Please see product specification sheets for the test conditions under which the stated performance are based, and exact membrane element dimensions.