NF-GO Supply System
Installation, details, options

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1 – Check-valve
2 – Shut-off valve
3 – Bladder accumulator
4 – Pressure gauge
5 – Pressure transmitter (optional)
6 – Flow transmitter (optional)

A – Barrier water supply line
B – To mechanical seal
C – From mechanical seal
D – Vent and drain

Operating and installation diagram for a NF-GO system

The NF-GO vessel should always be installed higher than the mechanical seal. Connection pipes to the seal should be designed with as little resistance as possible. The pressure of the barrier fluid must always be at least 2 bar above the process fluid pressure (max. 10 bar). The NF system is pressurized from the seal water line. In case of > 9 bar seal water line, a pressure reducing valve should be used at the barrier water inlet (1.)

Bolt the NF-GO system next to the device with the bracket / on stand next to the device.

Assemble all water tubes into the NF-GO system according to the GA drawing. To vent the mechanical seal / NF-GO system let the barrier fluid flow through the shutoff valve.

When starting up the device let the barrier fluid go through the mechanical seal until the temperature of the device is stabilized.

Close the barrier water outlet connection (shut-off valve).

If the temperature at the atmospheric side face housing or stationary seat rises above 110 °C, the outlet connection must be opened and the water amount must be adjusted so that the temperature of the barrier fluid does not exceed 60 °C.

When re-starting the device, open the outlet water connection and let the barrier fluid flow through the mechanical seal to ensure thorough venting.

Designation Version Recommended Application
Standard Version NF-GO/M144
Standard incl. Pressure Sensor NF-GO/M047
Seal Supply System incl.
H-Piping & Floor Stand