Pulsafeeder NextStep NS4 Stepper Motor Metering Pump

The Pulsafeeder NextStep NS4ASAKVVC1XXX combines a digitally controlled stepper motor with a PVDF liquid end for precise chemical dosing. Rated for up to 82 GPD (3.4 GPH / 13 LPH) at 145 PSI (10 bar), this standard 115V configuration uses FKM seats and O-rings with ceramic check balls.

Built to Order & Shipping Lead Time

This pump is built to order and typically ships directly from the manufacturer to you within 3–5 business days after your order is placed. The shipping service selected at checkout applies to transit time after shipment and does not include the build and processing time. Lead times are estimates and may vary with manufacturer order volume and component availability. Please call or email before ordering if you have a required delivery date.

Unlike a conventional solenoid-driven pump, NextStep controls the duration of both the suction and discharge strokes. This allows a smoother chemical feed and provides additional adjustment for applications involving off-gassing or more viscous fluids. Slow Mode adjusts suction stroke duration, while the color backlit display and dial interface simplify setup and show pump status.

Model Specifications

Model: NS4ASAKVVC1XXX
Manufacturer: Pulsafeeder
Series: NextStep
Pump type: Stepper motor diaphragm metering pump
Maximum output: 82 GPD / 3.4 GPH / 13 LPH
Maximum pressure: 145 PSI / 10 bar
Voltage configuration: 115V
Power supply range: 90–240 VAC, 50/60 Hz
Pump head / fittings: PVDF
Seats / O-rings: FKM
Check balls: Ceramic
Diaphragm: Solid PTFE
Configuration: Standard; Modbus and 4–20 mA output upgrade not included

Operating Modes and Controls

Choose constant output, proportional dosing using an analog or pulse input, batch operation, or daily and weekly timer functions. Standard inputs include 0/4–20 mA, 0–10 VDC, water-meter pulses, and remote start/stop. Low-tank-level monitoring and an alarm relay help operators identify conditions requiring attention.

Please call or email Water Treatment Resource for Modbus and 4–20 mA output options. The standard model already accepts 4–20 mA input; the optional output is a separate feature.

Liquid End and Application Selection

The PVDF head incorporates a bleed valve and double check valves. Select this FKM/ceramic configuration only after confirming compatibility with the chemical, concentration, and operating conditions. Contact Water Treatment Resource for help matching capacity, pressure, materials, and controller requirements.

What's Included

NS4ASAKVVC1XXX metering pump
PVDF injection valve
Foot valve strainer with integrated low-tank-level switch
Suction tubing
Discharge tubing
Bleed return tubing
Input and output cables
Integrated bleed valve in the pump head

View manufacturer specs here.

Pulsafeeder NextStep NS4ASAKVVC1XXX Metering Pump – 82 GPD, 145 PSI

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