Important Information

Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock.  Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved.

Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed.

Operation Guidelines

Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:

• Feed pressure should be increased gradually over a 30-60 second time frame.
• Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.

Specifications

• High flux rates
• Full-fit design
• Consistent quality from automated rolling

• Evaporator condensate polishing
• Sanitary applications

Specifications

• High flux rates
• Full-fit design
• Consistent quality from automated rolling

• Evaporator condensate polishing
• Sanitary applications

Advantages

• Highest rejection for the highest quality permeate, 40% better compared to industry standard membranes
• 30% lower energy than typical high rejection brackish water elements
• Specially designed low dP 28 mil feed spacer for lower feedside pressure drop along with the iLEC interconnecting end cap for better productivity and reliability

Important Information

Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved.

Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed.

Please refer to the application information literature entitled “Start-Up Sequence” (Form No. 609-02077) for more information.

Operation Guidelines

Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:

• Feed pressure should be increased gradually over a 30-60 second time frame.
• Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
• Permeate obtained from first hour of operation should be discarded.

General Information

• Keep elements moist at all times after initial wetting.
• If operating limits and guidelines given in this bulletin are not strictly followed, the limited warranty will be null and void.
• To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
• The Customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
• Maximum pressure drops are 15 psi (1.0 bar) per element or 50 psi (3.4 bar) per multi element pressure vessel (housing) which ever value is more limiting.
• Avoid static permeate-side backpressure at all times.

Advantages

• Heat Sanitizable
• High flux rates
• Full-fit design
• Consistent quality from automated rolling
• Filmtec performance and quality

Important Information

New HSRO heat sanitizable spiral elements must be pre-conditioned prior to initial use by exposure to hot water. An appropriate conditioning procedure consists of the following:

• Flush to drain with suitable quality water at low pressure and low permeate flow rate.
• Recycle warm water (45°C or less) at very low pressure (< 25 psig trans-membranepressure with a maximum feed pressure of 45 psig (3 bar)).
• Introduce hot water to the system to increase temperature to 80°C (176°F).
• Keep trans-membrane pressure below 25 psig (1.7 bar) when warm or hot water (45°Cor higher) is being fed to the membranes.
• Maintain temperature for 60-90 minutes.
• Allow system to cool to 45°C or below.

Operation Guidelines

Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:

• Feed pressure should be increased gradually over a 30-60 second time frame.
• Cross-flow velocity at set operating points should be achieved gradually over 15-20seconds.
• Permeate obtained from first hour of operation should be discarded.

General Information

• Keep elements moist at all times after initial wetting.
• If operating limits and guidelines given in this bulletin are not strictly followed, the limitedwarranty will be null and void.
• To prevent biological growth during prolonged system shutdowns, it is recommendedthat membrane elements be immersed in a preservative solution.
• The customer is fully responsible for the effects of incompatible chemicals and lubricantson elements.
• Maximum pressure drop across an entire pressure vessel (housing) is 60 psi (4.1 bar).
• Avoid static permeate-backpressure at all times.

Advantages

• Heat Sanitizable
• High flux rates
• Full-fit design
• consistent quality from automated rolling;
• Filmtec performance and quality

Important Information

New HSRO heat sanitizable spiral elements must be pre-conditioned prior to initial use by exposure to hot water. An appropriate conditioning procedure consists of the following:

• Flush to drain with suitable quality water at low pressure and low permeate flow rate.
• Recycle warm water (45°C or less) at very low pressure (< 25 psig trans-membranepressure with a maximum feed pressure of 45 psig (3 bar)).
• Introduce hot water to the system to increase temperature to 80°C (176°F).
• Keep trans-membrane pressure below 25 psig (1.7 bar) when warm or hot water (45°Cor higher) is being fed to the membranes.
• Maintain temperature for 60-90 minutes.
• Allow system to cool to 45°C or below.

Operation Guidelines

Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:

• Feed pressure should be increased gradually over a 30-60 second time frame.
• Cross-flow velocity at set operating points should be achieved gradually over 15-20seconds.
• Permeate obtained from first hour of operation should be discarded.

General Information

• Keep elements moist at all times after initial wetting.
• If operating limits and guidelines given in this bulletin are not strictly followed, the limitedwarranty will be null and void.
• To prevent biological growth during prolonged system shutdowns, it is recommendedthat membrane elements be immersed in a preservative solution.
• The customer is fully responsible for the effects of incompatible chemicals and lubricantson elements.
• Maximum pressure drop across an entire pressure vessel (housing) is 60 psi (4.1 bar).
• Avoid static permeate-backpressure at all times.

Advantages

• High flux rates
• Full-fit design
• Consistent quality from automated rolling
• FilmTec performance and quality

Important Information

Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved. Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed. Please refer to the application information literature entitled “Start-Up Sequence (Form No. 609-00298) for more information.

Operation Guidelines
Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:

• Feed pressure should be increased gradually over a 30-60 second time frame.
• Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
• Permeate obtained from first hour of operation should be discarded.

General Information

• Keep elements moist at all times after initial wetting.
• If operating limits and guidelines given in this bulletin are not strictly followed, the limitedwarranty will be null and void.
• To prevent biological growth during prolonged system shutdowns, it is recommended thatmembrane elements be immersed in a preservative solution.
• The customer is fully responsible for the effects of incompatible chemicals and lubricantson elements.
• Maximum pressure drop across an entire pressure vessel (housing) is 60 psi (4.1 bar).
• Avoid permeate-side backpressure at all times.