HY US 01 Introduction.qxp - Hydrotech

Mazzei Injectors
Mazzei injectors (patented) are extremely efficient, compact differential pressure injection devices. Currently operating
successfully in thousands of installations, worldwide, Mazzei injectors offer a reliable, accurate and economical method to
inject virtually any liquid or gas substance into a pressurized fluid stream.
Function - How Mazzei Injector Works
When a pressurized operating (motive) fluid enters the injector inlet, it is constricted toward the injection chamber and
changes into a high velocity jet stream. The increase in velocity through the injection chamber results in a decrease in
pressure, thereby enabling an additive material to be drawn through the suction port and entrained into the motive stream.
As the jet stream is diffused toward the injector outlet, its velocity is reduced and it is reconverted into pressure energy
(but at a pressure level lower than injector inlet pressure).
Mazzei injectors are extremely efficient. They operate over a wide range of pressures and require only a minimal pressure
differential between the inlet and outlet sides to initiate a vacuum at the suction port.
Advantages
• Molded from high quality thermoplastics with superior strength,
high temperature capability, resistant to most chemicals.
• No moving parts, low maintenance, trouble-free operation.
INLET
• Unique design allows maximum cavitation in the injection
chamber, thereby providing instantaneous mixing.
• Ideally suited for continuous mixing functions, require no
secondary blending devices.
• Initial cost and installation cost are low.
• Powered by the motive fluid, no external energy required for most installations.
• Available in a broad range of sizes, flows and injection capacities.
Injector Selection Guide
MAZZEI INJECTOR
SUCTION
PORT
OUTLET
INJECTOR SIZE EFFICIENCY* MOTIVE FLOW INJECTION CAPACITY
MODEL In Out ∆P required to flow thru injector Water Air
initiate suction @ 50 PSI GPH CFH
283 1/2” MNPT 26% 0.5 GPM 6 4
384 1/2” MNPT 25% 2.1 GPM 10 13
484 1/2” MNPT 18% 3.4 GPM 17 22
484-A 3/4” MNPT 18% 3.4 GPM 17 22
584 3/4” MNPT 18% 6.4 GPM 25 32
878 1” MNPT 16% 12 GPM 60 105
978 1” MNPT 16% 13 GPM 105
1078 1” MNPT 16% 17 GPM 75 135
1583 1-1/2” Hose Barb 18% 34 GPM 180 345
1583-A 1-1/2” MNPT 18% 34 GPM 180 345
1584 1-1/2” MNPT 18% 57 GPM 280
2081 2” Hose Barb 18% 101 GPM 500 820
2081-A 2” MNPT 18% 101 GPM 500 820
384-X 1/2” MNPT 50% 2.1 GPM 35 29
885-X 1” MNPT 32% 12 GPM 140 195
1585-X 1-1/2” MNPT 35% 36 GPM 350 390
2083-B 2” Hose Barb 67% 29 GPM 1130 830
2803-BA 2” MNPT 67% 29 GPM 1130 830
Injector Efficiency - The ability to
create a vacuum with minimal
differential pressure (∆P). The majority
of Mazzei injectors are highly efficient,
requiring less than a 20% pressure
differential to initiate a vacuum.
Testing - Performance data and other
technical information have been
prepared from actual test results and
are considered to be reliable. Mazzei
Injector Corp., however, assumes no
responsibility for the accuracy of
performance information under varied
field conditions.
Testing - was conducted at an
elevation of approximately 300 feet
above sea level. Water temperature of
both motive flow and liquid suction
was approximately 60°F. Liquid
(water) suction was measured at 0 lift.
Instruments and gauges used to
measure flows and pressures were of
the highest quality available and
calibrated to an accuracy of less than
± 2%.
Pre-assembled Mazzei and Bypass/Mixer Manifolds
Part No. Description
13584-01 1/2” Mazzei 384 injector c/w 3/4” bypass and 1” mixer
13584-02 3/4” Mazzei 484A injector c/w 3/4” bypass and 1” mixer
13584-03 3/4” Mazzei 584 injector c/w 3/4” bypass and 1” mixer
82 Hydrotech