Pump-solutions-group Neptune Series PZ_PZi_PZiG Pulse Metering Pumps Manuel d'utilisateur télécharger pdf (Page 8)

PZiG

PZiG for

alkali use

PZiG

Discharge volume (%)

Main piping

flow rate (%)

100

Alkali injection amount

100 (%)

76.5

Acid injection amount

100 (%)

147.57

Chemical injection amount

Residual chlorine

concentration

100 (%)

1mg/L0.5

Motor-driven

pump

Motor-driven

pump

Motor-driven pump

INVPID

DIS

Inverter

<50:1 control>

Alkali tank

PZiG for

acid use

Acid tank

PIDPID

INV INV

Example: On-site pH control

Example: Disinfection using electrolytic sodium hypochlorite in swimming pools

PZiG setting

for alkali use

PZiG setting

for acid use

*The pH 6.5 to 7.5 range is set as the dead band.

INVPID

Control panel

PID controller

Residual chlorine meter

Inverter

Control panel

Electrolytic sodium

hypochlorite

generating unit

Agitator

PID controller

Servo motor

Servo controller

PID controller

Inverter

pH meter

Display

Flow meter

Example: Any additive injected proportional to flow in a line

Current

system

Current

system

Current

system

PZiG

system

PZiG

system

PZiG

system

Motor-driven

pump

tatic mixer

<300:1 control>

Programmable Models PZi8 & PZiG Control System Examples

YOUR SYSTEM IS ENHANCED BY OUTSTANDING CONTROLLABILITY

Sterilization – Model PZiG only

Automatic control is possible on the pump unit merely by receiving signals directly from the residual chlorine meter and setting the target residual chlorine value.

Cost benefits: Control panels (PID controllers and inverters) are no longer required.

Advantage

pH Control – Model PZiG only

Control signals from the pH meter are received and chemicals are automatically injected

according to the preset pH value. This simplifies the configuration of the control devices.

Cost benefits: Two PID controllers and two inverters are no longer required.

Advantage

Proportional Flow Rate Control – Models PZi8 & PZiG

Flow meter signals are received directly according to the flow rate of the main piping and the discharge volume is automatically controlled.

This eliminates the need for control devices, which have been needed up until now, and reduces the cost of devices.

Cost benefits: Digital panel meters, PID controllers and inverters are no longer required.

Advantage

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Pump-solutions-group Neptune Series PZ_PZi_PZiG Pulse Metering Pumps Manuel d'utilisateur Page 8

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