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 |
NF3 |
CARTEX Seals |