Two eductor/four-way selector valve assembly
View Patent ↗A selector valve assembly for use in conjunction with an eductor dispensing system which reduces the incidence of product carry-over when the valve is moved from one position to another. The selector valve assembly also reduces the incidence of improper dispensing. In a preferred manner, the selector valve assembly has a single valve member and accommodates four product inlet lines for selectively passing chemical concentrate to two eductors. The selector valve assembly is composed of a minimum of ports, thereby reducing maintenance and cost.
1. A combined selector valve assembly which can control the flow of at least four flow paths of fluid in combination with at least one eductor comprising:
a body member having a compartment with an end wall;
an outlet passage in the end wall of the compartment;
at least four passages communicating with the compartment;
a rotatable member sealably positioned in the compartment, the rotatable member having a side wall and an end wall;
a first passageway extending a distance into the rotatable member from the end wall thereof;
a second passageway extending through the side wall thereof and communicating with the first passageway;
an eductor connected to the outlet passage; and
an additional eductor connected to the outlet passage,
whereby rotation of the rotatable member will selectively orientate the second passageway with each of the four passages so as to cause liquid in the four passages to pass to the first passageway and subsequently to the outlet passage and the eductor.
2. The combined valve assembly and eductor of claim 1 wherein one eductor has a one flow rate and the other has a faster flow rate.
3. The combined selector valve and eductor of claim 1 wherein the eductors are connected to the selector valve assembly by check valves.
4. The combined selector valve and eductor of claim 1 where the check valves are ball check valves.