PZ Series Electronic Metering Pumps

 

G&W offers competitive pricing on PZ pumps and make it easy to purchase from us. Call us for a quote - 304-422-4755

 

Neptune PZ Electronic Pulse metering pumps range in flow capacity from 0.1 ml/min to 300 gph (1135 lph), with manual or programmable models.  Some of the advantages include:

Digital settings from 15 to 300 pulses per minute on PZ models and from 1 to 300 pulses per minute on PZi and PZD models

High stroking speed ensures more uniform distribution of chemical at low feed rates

Pump delivery is constant at any voltage from 94 to 264 VAC single phase and is not affected by voltage fluctuations

Outdoor use—pump is water and UV resistant. Equivalent to IEC specification IP65. Dust proof, wash down duty (with proper electrical connection).

Typical applications include:

Injection of chemicals to boilers and cooling towers

Chlorine sterilization for food plants, small-scale water-supply systems, buildings and swimming pools

Injection of nutrients and disinfectants in the livestock industry, such as poultry and hog producers, as well as for hydroponic cultivation

Very low flow rate injection of low viscosity liquids for any application (100 CPS max. except high viscosity models)

 

Download Complete Electronic Pump Catalog

 

Available Models Include:

PZ Series

The PZ model is a basic model for manual control with three capacities available -31 (12 GPD) -61 (24) and -12 (38 GPD).

 

PZD Series

The PZD models offer the three basic capacities of the PZ pump and an additional two higher capacity models -32 (137 GPD) and -52 (204 GPD).  PZD Models also feature an extra large keyboard and the injection rate can be entered directly in milliliters per minute.  The injection rate can be set three ways by direct entry of:

-Stroke speed: 1 to 300 spm

-Percentage: 1 to 100%

-Injection rate: ml/min.
Onboard calibration measures the actual discharge volume under the exact operating condition of the specific installation and chemical, then stores that value to insure the correct injection rate.

 

PZi4 Series

The PZi4 models are capable of handling external input. The five capacites of the PZ and PZD units are also available with the PZi4.

 

 

 

 

 

PZi8 and PZiG Series

The PZi8 and PZiG series are sold as full programmable types only.  Up to 495 GPD PZiG Models offer capacities up to 495 GPD, which is comparable to units typically requiring motor driven pumps. Special models easily handle viscosities of 1000 CPS (up to 4000 CPS at reduced volume). Powerful onboard controls allow proportional flow rate, pH and residual chlorine control by direct analog connection eliminating the PID Controller and Inverter (plus the control panel to house them), that are required by similar sized motor driven pumps. The injection rate can be set three ways by direct entry of:

Stroke speed: 1 to 300 spm

Percentage: 1 to 100%

Injection rate: ml/min.

Manual stroke length adjustment 20% to 100%.

Onboard calibration measures the actual discharge volume under the exact operating condition of the specific installation and chemical, then stores that value to insure the correct injection rate.
• Multi-pump proportional flow rate injection from a single direct flowmeter signal (pulse/analog).
• Two point level switch control (see page 9)
• Batch injection • Interval injection
• Proportional control with shift and proportional band function.
• Two line LCD screen displays injection rate and/or operational progress.

 

Pump Head Materials of Construction

 

Standard Model: PVC (VFC/VEC)
• For general chemical applications
• Valve seats and O-rings are available in Viton® or EPDM
• Built-in relief valve

Chlorine Model:  Acrylic (CL)
• Transparent pump head allows visual check of valves
• Reduced head volume and upward sloping ports vent gas away from diaphragm
• Improved pump efficiency for countering gas lock
• Built-in relief valve

Chlorine Model with air release: _Acrylic (ARPZ)
• Same as the basic Chlorine model plus automatic air release mechanism
• The capacity is derated 5% over the standard acrylic model

Universal Model: PVDF (FFC/FEC/FTC)
• Suitable for most chemicals and highly corrosive chemicals
• Valve seats and O-rings are available in Viton®, EPDM or Teflon®
• Built-in relief valve

 

Stainless Steel Model (SS)
• For solvents and other chemicals where plastics are not suitable

 

Pumps come with:

Foot Valve Strainer*
Back Pressure/Check Valve
Injector with Quill*
Suction, Discharge and Air Release Tubing*
Power Cord with 3-Prong Plug
Signal Cable with Multi-Pin Connectors
(one with PZi4 & two with PZi8 & PZiG models)
*except some PZiG models (see page 4)

 

CAUTION – ALL MODELS
-Temperature limit is 32 to 104°F (0 to 40°C)
-Viscosity: 100 CPS max. except as noted
-This pump is designed for outdoor use. Avoid installing pump in a location where service life
could be shortened (i.e., where it is exposed to direct sunlight or driving rain).
-This pump cannot pump liquids containing a slurry.
-A relief valve should be installed on the discharge side on models where one is not provided, and if the discharge piping has a shutoff valve.