Toro Chemical Injection Specifications

Micro-Irrigation

Chemical Injection

®

azzei

M

Mazzei injectors offer an economical highly efficient means of injecting
gases and liquids, such as chlorine, fertilizers, and other agricultural
chemicals into a pressurized water system. Mazzei injectors use differential
pressure to create a low-pressure zone which draws the chemicals into a
pressurized water line.

Operation:

Mazzei injectors are venturi-type injectors:

When pressurized water 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 water 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 lower than injector inlet pressure).

Application:

• Agricultural irrigation systems using drip and/or sprinkler irrigation,
or any pressurized water system where a gas or liquid needs to be injected

njectors

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Features and Benefits:

• Saves labor

• Safe to use as the chemicals are under vacuum, not pressure

• Ensures even distribution of chemicals

• No external power source is required in most systems

• Low maintenance - no moving parts

• Chemicals cannot be injected when the irrigation system is off

• Available in Polypropylene or PVDF (Kynar
resistant to most chemicals, including acids

• Available with NPT or BSPT threads

Why PVDF (Kynar)?

Kynar is extremely resistant to most agricultural chemicals: Sulfuric acid,
Nitric acid, Chlorine, and Gypsum (Gypsum is very abrasive). Polypropylene
is not recommended for the above materials.

®

) - Kynar is extremely

Required Information for Liquid Injection Applications

The following information and calculations are required to determine the proper size and model of
Mazzei injector for liquid fertilizer injection. Below is a worksheet.

1. Determine total water flow (gpm or lpm): ______

2. Determine rate of injection required in (gph or l/min): ______

3. Determine pressure differential across injector:

a. System, or pump pressure at inlet to injector in (psi or Kg/cm2) ______

b. Pressure (back pressure) at outlet of injector in (psi or Kg/cm2) ______

2

c. Available pressure differential (3a – 3b) in (psi or Kg/cm

d. Percentage pressure differential [(3c/3a)x(100)] ______%

3.4. Determine installation method:

) ______

a. If the pressure differential (3d above) is 20% or greater, the injector can be

utilized without a booster pump. See “Typical Installations” page.

b. If the pressure differential (3d above) is less than 20%, the injector must be

installed in series with a booster pump. See “Typical Installations” page.

Injector Selection:

The injector performance tables in this
brochure list the motive flow values and suction
capacities for Mazzei®injectors under various
pressure conditions. Other applications exist
that are not covered in this brochure. Please
consult a Toro Micro Irrigation representative for
help with those inquires.

From the calculations above, use the
performance tables in the back of this brochure
to select an injector model that can exceed the
required injection (suction) rate. The total
water flow of the system must be greater than
the injector’s motive flow capacity (water flow
through the injector). The injector may be
installed in a “bypass” so that only the required
part of the total water flow passes through the
injector.

1. Locate the injector inlet pressure (psi or
Kg/cm2), step 3a above, which most
closely corresponds to your maximum
available water pressure.

2. Locate the injector outlet pressure (psi
or Kg/cm2), step 3b above,which most
closely corresponds to your system
pressure downstream of the injector
after installation.

3. Review the performance tables to
locate an injector model that has a
suction capacity that is greater than the
required suction capacity (gph or
l/min), step 2 above. Use a metering
valve or orifice assembly to obtain the
precise suction required.

Injector Product Range

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njector Injector Suction Bypass &

Model Size Line Kit Suction

Numbers In/Out Only Line Kit

MNPT or BSPT

gph lph

283 x x 1/2" 6.0 gph 22.7 lph K-184 K-184-A

287 x x 1/2" 8.3 gph 31.4 lph K-184 K-184-A

384 x x 1/2" 14.1 gph 53.4 lph K-184 K-184-A

384X x x 1/2" 33.9 gph 128.4 lph K-184 K-184-A

484 x x 1/2" 17.4 gph 65.9 lph K-184 K-184-A

584C x x 1/2" 25.6 gph 96.9 lph K-184 K-184-A

484A x x x 3/4" 17.4 gph 65.9 lph K-184 K-184-B

484X x x 3/4" 41.7 gph 157.8 lph K-184 K-184-B

584 x x x x 3/4" 25.6 gph 96.9 lph K-184 K-184-B

684 x x 3/4" 25.0 gph 95.0 lph K-184 K-184-B

878-02 x x x 1.0" 74.8 gph 283 lph K-183 K-181-A 02

885X-02 x x x x 1.0" 140 gph 530 lph K-183 K-181-A 02

1078-02 x x x x 1.0" 92.4 gph 350 lph K-183 K-181-A 02

1583A x x x x 1.5" 227 gph 860 lph K-183 K-183-A

1585X x x x 1.5" 323 gph 1222 lph K-183 K-183-A

1587 x x x 1.5" 261 gph 988 lph K-183 K-183-A

2081A x x x x 2.0" 631.0 gph 2388 lph K-282 K-282-A

2083X x x x 2.0" 1175.0 gph 4448 lph K-282 K-282-A

3090 x x 3.0" 1236 gph 4678 lph N/A N/A

4091 x x 4.0" 2820 gph 10673 lph N/A N/A

* Bypass and suction line kit combination is not available with BSPT threads for 1" and larger injectors

** 1/2" NPT threads are compatible with 1/2" BSPT threads

*** The 1" injectors ending with part number 02 have a new check valve design the same as the 1 1/2" injectors

NPT Polypropylene Black

NPT PVDF Black

Injector Models and Kit Assemblies

Maximum Suction Capacity

BSPT Polypropylene Green

BSPT PVDF Blue

@ 50 psi

@ 3.4 bars

Bypass and Suction Line Kit:

Specifying Information

AIV1583A-P (1.5" MNPT black poly injector)

XXX XXXXX - XXX

Example part number:

(blank) PVDF (Kynar®)

P Polypropylene black

PPG Polypropylene green

Injector model number

Suction Line Kit:

1. Tubing clamp

2. Metering Valve

3. Tubing (10FT.)

AIV NPT threads

AIC BSPT threads

4. Strainer

Note: Injector not
included in the kits

Typical Installations

Bypass installation

Note: Always consult state and local requirements
for backflow protection and chemical use

Injector installed around a
point of restriction such as a
regulator valve or gate valve
which creates a differential
pressure, thereby allowing the
injector to produce a vacuum.