Hale PSD - Manual (Page 13)

WARNING BUTTERFLY STYLE SUCTION VALVES
NOTICE: The PSD pump incorporates a butterfly style valve in the suction side of the
pump, or pumps utilizing large diameter delivery hose, REQUIRE the use of a suction
side relief valve of sufficient size and MUST be set at 150 PSI MAXIMUM. Do not
hydrostatic pressure test the butterfly valve above 150 PSI and make sure that it is in
the open position.
Most brands of butterfly valves REQUIRE modification for use. If the butterfly valve is supplied
by anyone other than Hale then contact our Engineering Department for the latest retrofit
requirements. Failure to stay within the above parameters releases Hale Products Inc. from all
liability resulting from the misuse or improper installation of this product.