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ULP 4040 Induatrial RO Reverse Osmosis Membrane

The ULP 4040 Induatrial RO Reverse Osmosis Membrane produces high quality water at a low operating cost. They are ideally suited to large industrial and municipal water treatment systems.

2.2.2 UMEK lU Series of Membrane Element

Brief Introduction

The ULP-4040 reverse osmosis membrane reduces operating pressure by up to 40%. It can operate at ultra-low pressure, achieving the same high water yield and desalination rate as a normal low pressure membrane element, and is suitable for desalination of surface and ground water. Stable desalination rates are typically achieved within 24-48 hours of continuous use, depending on feed water characteristics and operating conditions.

Specifications and Major Properties


Average Permeated Flow GPD (m3/d)

Stable Rejection Rate (%)

Minimum Rejection Rate (%)

















Testing Conditions:

Testing Pressure: 150 psi (1.03Mpa)

Temperature of Testing Solution: 25°C

Concentration of Testing Solution (NaCl): 1500ppm

pH Value of Testing Solution: 7.5

Recovery Rate of Single Membrane Element: 15%

Extreme Operation Conditions

Max. Working Pressure: 600psi(4. 14Mpa)

Max. Feedwater Flow: 75gpm(17 m3/h) (8040)

16gpm (3.6 m3/h) (4040)

Max. Feedwater Temperature: 45°C

Max. Feedwater SDI: 5

Residual chlorine Concentration of Feedwater: < 0.1ppm

pH Range of Feedwater during Continuous Operation: 3~10

pH Range of Feedwater during Chemical Cleaning: 2~12

Max. Pressure Drop of Single Membrane Element: 15psi(0.1Mpa)

Dimensions of Membrane Element

All dimensions are shown in: millimeter (inch)

Dimensions of Membrane Element (1)

Dimensions of Membrane Element (2)

Important Information

Any specific application must be limited within the extreme operating conditions. We strongly recommend you to refer to the latest edition of technology manual and design guide prepared by Hebei UMEK Environment Machine Co., Ltd. or consult experts proficient in membrane technology.

In case the customer fails to follow the operating conditions as specified in this manual, Hebei UMEK Environment Machine Co., Ltd. will assume no liability for all results. The permeate flow listed in the table is the average value.

The permeate flow of single membrane element is within a tolerance not exceeding ±20% of the nominal value. All wet-type membrane elements have been strictly tested before leaving the factory, and have been treated with the solution of 1.0% sodium hydrogen sulfite (an antifreeze solution of 10% propanediol required in winter) for storage purpose, then sealed with plastic bag in vacuum, and further packed in carton boxes.

In order to prevent the breeding of microbes during short-time storage, transportation and system standby, we recommend you to soak the membrane elements with protective solution (prepared with RO filtered water) containing 1.0% sodium hydrogen sulfite (foodstuff-purpose). Discard the RO-filtered water produced during the first one hour after system start-up.

During storage time and run time, it is strictly prohibited to dose any chemical medicament that may be harmful to membrane elements. In case of any violation in using this kind of chemical medicament, Hebei UMEK Environment Machine Co., Ltd. assumes no liability for any outcome incurred herefrom.