Positive Displacement Pump Injection System . I Electrically interlocked

Chemical supply tank J 4 4- interlocked with irrigation . - pump

Irrigation 4

controller e

* I

4

4

t e

f Solenoid valve ****

r.r.r.I. . .** ...* ~ m ~ m ~ m m r n m ~ * ~ ~ ~ * ~ ~ * '

u n m n ~ o m m m n ~ m e m m m ~ . .==.. = = m a

TO irrigation system

Check valve

Single check valve Shutoff Pressure with vacuum relief va Ive switch and low pressure

drain Electric motor

and pump

Positive Displacement Pump Injection System (alternative device 1) Spring loaded check valve on intake side of injection pump

Irrigation controller

Positive displacement pump injector interlocked with irrigation pump

Filter

Chemical supply tank

Electric motor and pump

drain

Positive Displacement Pump Vacuum-reliefvalve

Injection System (alternative device 3) Vacuum-relief valve located on gooseneck (1 2'l above highest fluid level in supply tank). n

Positive displacement pump injector interlocked with irriqation pump

Irrigation controller

Chemical supply tank

**

Single check valve with vacuum relief and low pressure

drain Electric motor

and pump

Check valve

Shutoff va Ive

To irrigation syst Pressure switch

:em

Double CheckValve, Positive Displacement Pump Injection System

.................. ***a* 94

_ f *a. -4- Positive displacement pump injector

Chemical supply tank

........... m m ~ m m m a m ~ ~ ~ ~ ~ ~ * ~ L * u ..................

Electrically interlocked

To irrigation system

and low pressure drain valve switch

Check valve

Electric motor and pump

Inline Venturi Injector System 1

Irrigation controller

Chemical supply tank

** 4

**a

To irrigation system Single check valve Shutoff Venturi L- 4 and low pressure with vacuum relief va Ive

Electric motor and pump

drain

lnline Venturi Injector System 2

Irrigation controller

*+ 1

Electrical control panel

Chemical supply tank

Checkvalve [ )

1 Hydraulically-operated

Single check valve Shutoff Venturi with vacuum relief va Ive and low pressure

Electric motor and pump

drain

Bypass Venturi Injector System 1

Irrigation controller

Filter

Chemical supply tank

*+ *4 *.

**..mm

TO irrigation system Gate or

butterfly valve and low pressure

Electric motor and pump

drain

Bypass Venturi Injector System 2

Irrigation controller

Electrical control panel

Chemical supply tank

Hydraulically-operated valve (normally closed)

I I TO irrigation system

b-6 with vacuum relief Single check valve --- and low pressure

Gate or butterfly valve

Electric motor and pump

drain

Bypass Venturi Injector System 3

* c

Irrigation controller

Filter

Electrically intel control panel

'e. =a *am...

,locked

Chemical supply tank

To irrigation system Single check valve with vacuum relief u and low pressure

Gate or butterfly valve

Electric motor and pump

drain

Bypass Venturi Injector System 4

Irrigation controller

Chemical supply tank

- To irrigation system

Single checkvalve with vacuum relief and low pressure

Gate or butterfly valve

Electric motor and pump

drain

Bypass Venturi Injector System 5 (with Auxiliary Booster Pump)

Bypass Venturi Injector System 7 (with Auxiliary Booster Pump)

Irrigation controller

Chemical supply tank

Electrically interlocked

Solenoid valve (normally closed)

booster pump

- To irrigation system

Single check valve with vacuum relief and low pressure

Electric motor and pump

drain

Bypass Venturi Injector System 8 (with Auxiliary Booster Pump)

Irrigation controller

** 1

Electrical control panel

Chemical supply tank

and low pressure

Electric motor and pump

drain