US 7,320,333 B2 | ||
Compact field adjustable pressure reducing valve | ||
James M Trapp, Galien, Mich. (US); and Eric Combs, Goshen, Ind. (US) | ||
Assigned to Elkhart Brass Manufacturing Company, Inc., Elkhart, Ind. (US) | ||
Filed on May 09, 2005, as Appl. No. 11/124,986. | ||
Prior Publication US 2006/0249206 A1, Nov. 09, 2006 | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. G05D 16/00 (2006.01) |
U.S. Cl. 137—14 [137/495; 137/505.26; 137/505.28] | 21 Claims |
17. A method of automatically adjusting the pressure of a pressure reducing valve, the valve having a valve body with an inlet
for coupling to a pressurized water supply line, an outlet, a chamber, and a passage extending between the inlet and the outlet,
the valve body having a valve seat between the inlet and the outlet, the valve further having a valve stem and the valve including
an automatic pressure reducing system for urging the sealing member toward the valve seat for throttling the valve to thereby
reduce the pressure at the outlet, the automatic pressure reducing system including a piston coupled to the valve stem and
located in the chamber, water pressure being directed to the chamber and applying pressure to the piston to urge the sealing
member toward the valve seal to adjust the pressure at the outlet, said method comprising:
generating a spring force with parallel springs; and
applying the spring force to the piston to counteract the pressure on the piston to thereby adjust the pressure at the outlet;
and
manually urging the sealing member toward said valve seat by manipulating a hand operable member adapted to close the valve,
wherein the hand operable member is decoupled from the spring force and the pressure on the piston.
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