Agricultural ammonia tool bar throttle valve
OwnerJames Michael Jonesinventor
Life of this patent
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Abstract
A simple ammonia tool bar throttle valve is disclosed which is primarily for use with those systems which will utilize a stripper pump unit to increase the ammonia system pressure prior to the metering devices. The ammonia tool bar throttle receives the metered ammonia at a greater pressure than that of the system storage tank, and enters a lower chamber where it crosses a filter before exiting the unit across a throttle orifice which is throttled by the action of an aluminum throttle diaphragm which separates the lower chamber from a control chamber. The aluminum throttle diaphragm is positioned to maintain the desired mass flow by the forces of a separately regulated ammonia control fluid which is throttled to the control chamber before being bled back to the storage tank across an orifice.
Claims8
A ammonia throttle valve, comprising:
- a housing having an ammonia chamber, with an ammonia inlet, and a control chamber with a control inlet passage and a bleed-off passage;
- a throttle diaphragm assembly separating the ammonia chamber from the control chamber in said housing;
- a throttle body having an outlet passage in fluid communication with a throttle orifice;
- and
- wherein the throttle orifice of said throttle body is positioned within the ammonia chamber of said housing such that the relative pressures in the ammonia chamber and the control chamber position said throttle diaphragm assembly between a closed position blocking the throttle orifice of said throttle body and an exposed position exposing the throttle orifice of said throttle body.
Dependencies are inferred from the claim text.