Dispenser with inline pressure regulator
A proportioning dispenser of concentrated chemical mixed in a diluent such as water includes a water valve, an in-line water pressure regulator downstream of the valve and an eductor downstream of the regulator. When the valve is open, water flows to the regulator, and a pressure regulator water flow passes to the eductor. When the valve is closed, no water flows to the regulator, which sees pressurized water only when the water valve is open during a dispensing cycle. More accurate dilution ratios are achieved over a wide range of incoming water line pressures. In an alternate embodiment, a water valve and a regulator are formed in a common housing with the regulator operationally downstream of the valve.
1. A dispenser for dispensing water-diluted chemicals for use, said dispenser including, in combination, an integral one-piece housing having a discharge outlet, a backflow preventer operably connected to said discharge outlet and having a downstream end a chemical eductor operably connected to the downstream end of said back flow preventer and for drawing concentrated chemical into a water flow passing through said eductor for dilution and discharge, said combination further comprising, in said integral one-piece housing,
a valve seat defined by said housing;
a water valve operably disposed for selective engagement with said seat for selectively blocking or passing water past said seat;
a first water bore extending in a first direction in said housing and operably communicating with said valve of upstream of said seat;
a second water bore defined in said housing and extending in a second direction in said housing from a first end of said second water bore proximate to and operatively communicating with said seat, to a second downstream end of said second water bore;
a third water bore defined in said housing and extending in a third direction in said housing to said discharge outlet of said housing, said third water bore having an upstream first end operably communicating with said second downstream end of said second water bore,
a pressure regulator disposed within said third water bore for receiving water from said second bore and passing water at a selected pressure downstream from said regulator and said discharge outlet to said backflow preventer;
said first and third water bores extending respectively in said first and third directions perpendicular to each other;
said first direction extending perpendicularly to said second direction; and
said third direction extending perpendicularly to said second direction.
2. A dispenser as in claim 1 wherein said second water bore is smaller in diameter than said third water bore.
3. A dispenser as in claim 1 wherein said housing surrounds said valve seat and has an interior threaded portion for receiving said water valve above said first end of said second water bore.
4. A dispenser as in claim 1 further including an externally threaded section of said housing about said discharge outlet of said housing.
5. A dispenser as in claim 4 further including a retainer on said externally section about said third bore and holding said pressure regulator within said third bore.
6. A dispenser as in claim 5 wherein said retainer includes and externally threaded section downstream of said discharge outlet of said housing.
7. A dispenser as in claim 1 wherein said backflow preventer and said eductor are disposed outside said integral, one-piece housing.