YDR-SWFF-TF-16 06/2019
4. Connect the water line to the in-line filter feed connection (A) and from the in-line filter output connection
(C) to the Flow Fuse inlet connection (D). Note that the maximum input pressure of the in-line filter (B) is 8
bar / 116 psi. If the water line pressure feeding the in-line filter is above 8 bar / 116 psi we advise that you
use a regulator to reduce this water pressure to below 8 bar / 116 psi before it reaches the in-line filter (B).
Note that the maximum temperature the inline filter can withstand is 50ºC / 122ºF.
5. Release the cap on the black regulator adjustment (E) and rotate it fully counter clockwise.
6. Before filling the vessel with barrier fluid, disconnect the return pipe (Q) at the seal return connection on
the vessel (L). This will allow any trapped air to escape out of the seal.
7. Turn on the plant water supply and fill the vessel by rotating the regulator handle clockwise (E) and
holding in the red Flow Fuse fill button (H) until barrier fluid is seen at the end of the seal return pipe (Q).
When barrier fluid is seen release the red Flow Fuse fill button (H).
8. Re-connect the seal return pipe (Q) to the vessel seal return connection (T).
9. Keep the red button (H) pressed in and turning the regulator handle (E) until the desired barrier pressure is
achieved.
10. Ocne the desired barrier pressure is achieved, release the red button (H), which should stay depressed.
Set Relief Valve Relieving Pressure
11. The working pressure of the relief valve (M) must be set before the working pressure of the system (the
working pressure of the relief valve should be 1 bar / 14.5 psi above the System working pressure). The
operating parameters of the relief valve are 5 - 10 bar / 72.5 - 145 psi (maximum relief valve set pressure
10 Barg / 145 psig).
12. Unscrew the relief valve adjuster cap (N) fully anti-clockwise.
13. Press and hold in the red Flow Fuse fill button (H) for approximately 3 minutes to fill the vessel. When the
vessel is filled, rotate the black Flow Fuse regulator adjustment (E) clockwise, until the desired relieving
pressure of the the relief valve is seen on the pressure gauge (G).
14. Screw the relief valve adjuster cap (N) clockwise until the Relief valve (M) starts to leak.
15. At this point stop turning the relief valve adjuster cap (N), and lock it using the lock nut. This is now set as
the relieving pressure for the system.
If the relief valve has been factory pre-set the set pressure will be detailed on the nameplate.
Set the Flow Fuse Barrier Fluid Pressure
16. Open the drain valve (O) for 2 minutes to drain the vessel.
17. Repeat installation and commissioning steps 5 –8.
18. Press and Hold in the red Flow Fuse fill button (H) for approximately 3 minutes to fill the vessel. When the
vessel is filled rotate the black Flow Fuse regulator adjustment (E) clockwise until the desired barrier fluid
pressure is seen on the pressure gauge (G). Please note that the Flow Fuse is at its optimum operating
condition when the barrier fluid pressure is set 2 bar / 30 psi above stuffing box pressure (to a maximum
regulator set pressure of 6 Barg / 87 psig).
19. Once the desired pressure is shown on the pressure gauge (G) close the black regulator adjustment cap
(E). Slowly release the red Flow Fuse fill button (H). The red Flow Fuse fill button should be level with the
Flow Fuse casing. **
20. For direction of flow details please refer to Table 3.
that the Flow Fuse has two operating modes:
a. Manual Re-Set mode –The Re-Set mode adjuster (I) will be screwed completely in. In this mode the Flow
Fuse will completely shut off the plant water supply upon any seal failure. To reset the Flow Fuse press the red
button (H).
b. Auto Re-Set mode –The Re-Set mode adjuster (I) will be screwed counter clockwise. In this mode the Flow
Fuse will re-establish operating conditions after seal failure by allowing a small flow of water from the plant water
supply back into the vessel. The amount of flow will depend on how far the Re-Set mode adjuster (I) is screwed
counter clockwise (4 full turns counter clockwise sets the Flow Fuse in full Auto Re-Set). The Flow Fuse comes
factory set in Auto Re-Set mode.
