Trillium WSP-6, Installation, Operation & Maintenance Instructions Manual, Page: 50 / 73

WSP™
DATA SHEET WSP™ SELF-PRIMER PUMPS WSP-D300_6
Rev. 3 01/09/20
© 2019 The Factory
50
Once your pump is fully primed, pressure from the liquid pressing against the valve
diaphragm compresses the spring and shuts the valve (Figure 15). The valve then stays
closed, slowing the liquid bypass down to 1 to 4 gallons (3.8 to 19-liters) per minute.
ENSURE THAT THE BYPASS LINE IS DIRECTED BACK INTO THE WET-WELL OR TANK
TO PREVENT HAZARDOUS SPILLS AS SOME LEAKING (1 TO 5 GALLONS [3.8 TO 19
LITERS] PER MINUTE) WILL OCCUR WHEN THE VALVE IS IN THE FULL-CLOSED
POSITION.
The spring will automatically return the diaphragm to its open position once the pump shuts
down. Solids remaining in the chamber of the diaphragm will settle at the bottom. During
the next priming cycle, these leftover solids will be flushed out.
NOTE:
Should the pump not achieve adequate pressure levels for its designed
capacity or head, the valve will stay open. Adequate pressure to close the
valve depends on the discharge head of the pump working at full capacity.
The valve’s range of closing pressure is determined by the spring’s tension
rate when it is ordered from the factory.
Adjust valve closing pressure to the correct system application requirements
by moving the spring retaining pin up or down the plunger rod. This will
increase or decrease tension on the spring.
Contact your local WSP™ distributor or the factory for information regarding a
WSP™ ARV (automatic release valve) for many applications.
2. WSP™ Air Release Valve Installation
Independently mount the WSP™ ARV horizontally, and connect it to
the self-priming pump discharge line. (Figure 16).
NOTE:
Contact the factory for specific installation instructions if the WSP™ ARV is
being installed on a staged pump application.