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  • CPA5-LD-8040 Equivalent
CPA5-LD-8040 Equivalent

CPA5-LD-8040 Equivalent

Equivalent, equivalence, replacement, alternative, analog, retrofit, analogue, derivative, substitution: Hydranautics CPA5-LD-8040, CPA5LD8040

General Information

TFFRLD-8040C is manufactured as an equivalent, replacement, alternative, retrofit, analogue to Hydranautics CPA5-LD-8040 (CPA5LD8040) RO membrane element.
Hydranautics CPA5-LD-8040 equivalent reverse osmosis membrane elements TFFRLD-8040C are developed for brackish water treatment, ideal for reverse osmosis plant managers and operators dealing with brackish water with pre-treatment.
Hydranautics CPA5-LD-8040 equivalent reverse osmosis membrane element provides consistency, high permeate water quality, high performance and productivity, and long service life.

Features & Advantages

  • Provides high-quality permeate water
  • Stable salt rejection rate and high permeate flow rate
  • Optimized design, good resistance to fouling results in long service life
  • High chemical tolerance for cleaning with highly effective cleaning performance
  • Simple and economical element replacement to Hydranautics CPA5-LD-8040


  • Industrial pure water
  • Industrial wastewater reuse
  • Slightly contaminated 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)

11,000 (41.6)



Standard test conditions:
The above performance is initial(data record after 30 minutes of operation), based on the following conditions:
1,500 ppm NaCl solution
225 psi (15.5 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 CPA5-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.

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