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A valve assembly comprises a diaphragm valve, a pressure regulator and a solenoid. The pressure regulator is operatively coupled to the diaphragm valve for maintaining a predetermined pressure in water exiting the diaphragm valve despite fluctuations in the pressure of water entering the diaphragm v

A valve assembly comprises a diaphragm valve, a pressure regulator and a solenoid. The pressure regulator is operatively coupled to the diaphragm valve for maintaining a predetermined pressure in water exiting the diaphragm valve despite fluctuations in the pressure of water entering the diaphragm valve. The solenoid is mounted on the pressure regulator so that a plunger axis of the solenoid extends through a coil spring of the pressure regulator. The solenoid is operatively coupled to the diaphragm valve through the pressure regulator for opening and closing the diaphragm valve.

대표청구항 ▼

We claim: 1. A valve assembly, comprising: a diaphragm valve; a pressure regulator having a first coil spring and operatively coupled to the diaphragm valve for maintaining a predetermined pressure in water exiting the diaphragm valve despite fluctuations in the pressure of water entering the diaph

We claim: 1. A valve assembly, comprising: a diaphragm valve; a pressure regulator having a first coil spring and operatively coupled to the diaphragm valve for maintaining a predetermined pressure in water exiting the diaphragm valve despite fluctuations in the pressure of water entering the diaphragm valve; and a solenoid having a second coil spring and mounted on the pressure regulator so that an axis of the solenoid extends through the first coil spring of the pressure regulator, the solenoid being operatively coupled to the diaphragm valve through the pressure regulator for opening and closing the diaphragm valve. 2. The valve assembly of claim 1 wherein the solenoid is mounted on one end of the pressure regulator. 3. A valve assembly, comprising: a diaphragm valve; a pressure regulator having a first coil spring and operatively coupled to the diaphragm valve for maintaining a predetermined pressure in water exiting the diaphragm valve despite fluctuations in the pressure of water entering the diaphragm valve; a solenoid having a second coil spring and operatively coupled to the diaphragm valve through the pressure regulator for opening and closing a pilot valve; and a metering orifice of the pressure regulator opening into the same control chamber as the pilot valve. 4. The valve assembly of claim 3 wherein the solenoid is mounted on one end of the pressure regulator. 5. A valve assembly, comprising: a diaphragm valve; a pressure regulator having a first coil spring and operatively coupled to the diaphragm valve for maintaining a predetermined pressure in water exiting the diaphragm valve despite fluctuations in the pressure of water entering the diaphragm valve; a solenoid having a second coil spring and operatively coupled to the diaphragm valve through the pressure regulator for opening and closing a pilot valve; and a metering orifice of the pressure regulator being laterally spaced from a central axis of the coil spring. 6. The valve assembly of claim 5 wherein the solenoid is mounted on one end of the pressure regulator. 7. A valve assembly, comprising: a main valve; a pressure regulator having a donut-shaped diaphragm and operatively coupled to the main valve for maintaining a predetermined pressure in water exiting the main valve despite fluctuations in the pressure of water entering the main valve; a solenoid operatively coupled to the main valve through the pressure regulator for opening and closing a pilot valve; and the pressure regulator including a passage for delivering water to the pilot valve through a central opening in the donut-shaped diaphragm. 8. The valve assembly of claim 7 wherein the solenoid is mounted on one end of the pressure regulator. 9. In combination, a diaphragm valve; a pressure regulator operatively coupled to the diaphragm valve and having a first coil spring; and a solenoid having a second coil spring and mounted to the pressure regulator so that a longitudinal axis of a plunger of the solenoid extends through the first coil spring. 10. The combination of claim 9 wherein the pressure regulator has a metering orifice that communicates with a control chamber that also communicates with a pilot orifice opened and closed by the solenoid. 11. The combination of claim 9 wherein the pressure regulator has a metering orifice that is asymmetrically located relative to a central axis of the coil spring. 12. The combination of claim 9 wherein a central vertical axis of the solenoid is substantially co-axial with a central vertical axis of the pressure regulator. 13. The combination of claim 9 wherein the pressure regulator includes a flexible diaphragm with a central opening, a pilot valve member with a pilot orifice located in the central opening of the flexible diaphragm, and a pin plate that reciprocates relative to the pilot valve member based on deformation of the flexible diaphragm to move a pin on the pin plate into and out of a metering orifice in the pin plate. 14. The combination of claim 13 and further comprising a third coil spring that urges the pin plate toward the flexible diaphragm. 15. The combination of claim 9 wherein the pressure regulator includes a body that has a male threaded portion for screwing into the bonnet of a diaphragm valve.