Economical equivalents with quick delivery for membrane replacement of your water and wastewater treatment projects.

Products >> Industrial RO Membrane >> TaFlux ULP Series RO Membrane

  • ESPA4-LD-8040 Equivalent
ESPA4-LD-8040 Equivalent

ESPA4-LD-8040 Equivalent

Equivalent, equivalence, replacement, alternative, analog, retrofit, analogue, derivative, substitution: Hydranautics ESPA4-LD-8040, ESPA4LD8040

General Information

TFXLP-8040-34E is manufactured as an equivalent, replacement, alternative, retrofit, analogue to Hydranautics ESPA4-LD-8040 (ESPA4LD8040) RO membrane element.
Hydranautics ESPA4-LD-8040 equivalent reverse osmosis membrane elements TFXLP-8040-34E are developed for energy saving for water treatment in low TDS environments, ideal for the desalination of municipal water, groundwater with less than 1,000 ppm.
TFXLP-8040-34E reverse osmosis membrane element provides reliable performance and long service life at an extra low feed pressure, and can be widely used in pure water preparation and related industries.

Features & Advantages

  • Extreme low working pressure
  • Energy saving
  • Economical efficiency
  • Economical equivalent element for direct replacement to Hydranautics ESPA4-LD-8040


  • Potable water
  • Commercial water system
  • Industrial process water


  • Configuration: Spiral wound element
  • Membrane Polymer: Polyamide thin-film composite


Element Model

Membrane Active Area

ft2 (m2)

Feed Spacer

Mil (mm)

Permeate Flow Rate*

GPD (m3/d)

Stabilized Salt Rejection**

Minimum Salt Rejection


400 (37.2)

34 (0.864)

10,500 (39.7)



Standard test conditions:
The above performance is initial (data record after 30 minutes of operation), based on the following conditions:
500 ppm NaCl solution
100 psi (7 bar) operating pressure
25°C (77°F) operating temperature
15% permeate recovery
7.5-8 pH range
*Permeate flow for individual elements may vary but will be no more than ±15%.
**Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending on feed water characteristics and operating conditions.
Element Dimensions
Hydranautics ESPA4-LD-8040 Equivalent RO Membrane Element Dimensions


Length L
inch (mm)

Diameter D
inch (mm)

Permeate tube inner diameter d
inch (mm)


40 (1,016)

7.9 (201)

1.125 (28.6)

Operating and Cleaning Limits

Maximum Operating Pressure

600 psi (41 bar)

Maximum Operating Temperature

45°C (113°F)

Maximum Chlorine Concentration

0.1 ppm

pH Range, Continuous

2 - 11

pH Range, Cleaning

1 - 13

Maximum Feed SDI (15 mins)


Maximum Element Pressure Drop

15 psi (1 bar)

Maximum Feed Flow

17 m3/h

Minimum Ratio of Concentrate to Permeate Flow for Each Element


The limits shown above are for general applications. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane element.

Previous Product:TMG20-370 Equivalent Next Product:ESPA4-LD Equivalent

Contact Us

    Name: International Sales Dept.

    Tel: +86-27-8673 0002

    Fax: +86-27-8732 0476

    E-mail: [email protected]

    Add: 4th Floor, Baofeng Ages, 1045 Jiefang Blvd, Qiaokou District, Wuhan, Hubei Province, 430030, China