6 gal +1 pt (22.7 1 Oi.51)
18 in. (45.72 cm)
4 in. (10.16 cm)
18 in. (45.72 cm)
Section III. PRINCIPLES OF OPERATION
Flow Path. The hypochlorination (see Figure 1-3) unit provides for the addition of hypochlorite solution to
unchlorinated water using hydraulic pressure from the untreated water.
System inlet water diverts from the water manifold (1) through the inlet valve pipe assembly (2) to the
lower main case assembly (3) of the ratio-feeder (4).
The lower main case assembly (3) operates as a water motor.
The inlet of the pumper assembly (5) is connected to the reservoir assembly (6).
The outlet of the pumper assembly (5) is connected to the antisiphon valve (7) on the outlet pipe
The outlet pipe assembly (8) connects the outlet of the lower main case assembly (3) to the outlet of the
The water motor assembly of the lower main case assembly (3) activates the upper main case assembly
(9) and pumper assembly (5) to inject hypochlorite solution. The hypochlorite solution is pumped from
the reservoir (6) through the pumper assembly (5) and injected by the antisiphon valve (7) into the outlet
pipe assembly (8).
Ratio-Feeder Assembly Operation. The water motor operation of the lower main case assembly applies rotary
motion to a drive dog in the upper main case assembly.
The drive dog (13, Figure 1-4) turns the cam (1).
When the cam (1) pushes the valve arm (2) completely, the valve arm (2) pushes on valve (4) to open it.
When valve (4) is open, water from the lower housing assembly flows through the hole (5) and
pressurizes the upper housing assembly. This pressurized water passes through a pipe to the
pumphead assembly where it pushes on the water side diaphragm (6).
The pressure overcomes spring (10) pressure pushing the chemical diaphragm (7) which pumps
calcium hypochlorite out the discharge valve (8).
When the cam (1) releases valve arm (2), spring (11) pressure allows ball valve (4) to shut and R-valve
(3) to open. The R-valve (3) discharges water to environment relieving water pressure on water side
When water pressure is no longer on water side diaphragm (6), spring pressure pushes diaphragm to
original position and pulls chemical side diaphragm (7) away from pump housing (12) causing calcium
hypochlorite to be drawn through suction valve (9). The cam (1) continues to turn and repeat this action
as long as there is flow through the water meter.