FLEX User Instruction – 21TEM14546 EN
Page 27 of 43
1. Flush the system and FLEX units (both high-pressure and low-pressure sides) with fresh
water to remove salt and prevent mineral buildup.
2. Preventative measures should be taken to inhibit biological growth.
HIGH-PRESSURE REMAINS AFTER SHUTDOWN
Even when the pumps are shut down, high-pressure can remain in the system due to osmotic
pressure at the membranes. To completely depressurize the FLEX units, flush brine out of the
membranes, use isolation valves between the FLEX and membranes, and leave an outlet of the
low-pressure system.
NEVER ISOLATE LOW-PRESSURE LINE WHEN FLEX IS OPERATING OR PRESSURIZED
Never fully close the low-pressure inlet and outlet valves to the FLEX while it is operating or under
pressure. This can cause a dangerous build-up of pressure in the low-pressure system piping due
to internal leakage in the FLEX device. Appropriate pressure relief devices should be installed to
prevent damage to equipment or injury to personnel in this situation.
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