Mixing apparatus

An apparatus for mixing a first fluid under pressure from a first source with a second fluid from a second source, comprising a primary conduit having an inlet communicating with the first fluid in the first source, and an outlet;

• a secondary conduit having an inlet communicating with the second fluid in the second source, and an outlet;
• a diversion conduit having an inlet connected to said primary conduit upstream of the primary conduit outlet and an outlet connected to said secondary conduit upstream of the outlet thereof;
• valve means for regulating the flow of the first fluid from said primary conduit through said diversion conduit, said valve means being adjustable between open and closed positions;
• and eductor means having an outlet and a primary inlet, the latter being connected to said primary conduit outlet and disposed downstream of the connection between said primary and diversion conduits, said eductor means being provided with a suction inlet intermediate the primary inlet and outlet of said eductor means, said suction inlet being connected to the secondary conduit outlet and downstream of the connection between said secondary and diversion conduits, said valve means, when in said closed position, effecting flow cut-off of said first fluid through said diversion conduit and maximum flow of said second fluid through said secondary conduit to said eductor, and when in said open position, effecting maximum flow of said first fluid through said diversion conduit and minimum flow of said second fluid through said secondary conduit to said eductor, whereby a continuous fluid flow through at least said secondary conduit downstream of the connection with said diversion conduit occurs when the first fluid in said primary conduit flows through the primary inlet and outlet of said eductor means.