This product is designed to withstand periodic exposure to temperatures as high as 90°C for cleaning and chemical-free sanitization while operating below 50°C.

In numerous pure water applications, hot water sanitization is utilized to ensure consistent product quality, bacteria-free packaging and membrane system performance. When “biocide” isn’t an option, or choice, high temperature water is an effective and cost-efficient solution for many applications. Since Pasteur’s discovery in 1865, moist heat sanitization, or Pasteurization, has been used to kill any bacteria or microbes to a safe level. Heat conveyed by hot water acts on microorganisms by denaturation and coagulation of protein chains. The table below shows approximate operating conditions (temperature and period of time) for moist heat eradication.

Duratherm HWS Advantage

Duratherm HWS elements are designed, engineered and manufactured to provide consistent, reliable performance under extreme operating parameters. These elements can handle hot water sanitizing at temperatures as high as 90°C at low pressure, according to the GE Osmonics' specified protocol.

Consistent hot water sanitization of RO/NF units will regularly pasteurize and free the membranes of any vegetative cells. In fact, in many cases hot water is the best choice to sanitize your system. Hot water sanitization also offers additional advantages as compared to biocide options, including:

HWS RO Industry Applications

GE Osmonics Duratherm HWS offers superior hot water sanitization for many diverse industries, such as:

Dialysis:

Hot water sanitization has been proven effective for sanitization of RO units used for dialysis. Pasteurization is performed at 80°C as a routine procedure for purification of membranes operating with tap water at the hospital.

Pharmaceuticals/Food/Cosmetics /Drinking Water:

When water is used as a raw material in the manufacturing process of human drugs, personal care products and food, stringent testing of water quality for cleaning/sanitization is required. Hot water sanitization can be a simple and extremely cost effective application to ensure the water treatment plant is safe of any contamination.

Power/Semi conductor/Sensitive Water:

When feed water is prone to microorganism growth or when your process water cannot tolerate any chemicals, hot water sanitization can be the perfect solution to prevent microorganism growth and biofilm development in the RO system without utilizing expensive, or unacceptable, chemical biocide.

Duratherm RO Specifications

Specifications are based on a 2,000 mg/l NaCl solution at 225 psig (1551 kPa) operating pressure, 77°F (25°C) after 24 hours. Individual flux may vary +25%/-15%.

Operating and Design Parameters

The Duratherm® HWS RO elements provide reliable performance at continuous operating temperatures up to 122°F (50°C) in low crossflow environments, with water-like viscosity and no suspended solids, or for processes which require periodic hot-water sanitizing up to 194°F(90°C). They feature high temperature tolerant materials including the DURASAN® outerwrap. The materials of construction conform to established guidelines as described in the Code of Federal Regulations, Vol. 21.

Pressure Drop Maximum Elements per pressure vessel 1 2 3 4 5 15 (103) 30 (207) 45 (310) 60 (414) 60 (414)

Duratherm HWS RO 8040

Duratherm HWS RO 4025