Stepper metering pumps

Stepper metering pumps use advanced stepper motor technology to ensure highly precise, stable, and fully adjustable chemical dosing. By controlling the motor digitally, they can modulate flow in real time, adapting instantly to changes in system conditions while maintaining consistent performance. Combined with the advantages of peristaltic operation, this solution enables a wide turndown ratio, improved efficiency, reduced chemical waste, and safer operation, making it ideal for both simple and complex applications.

This category includes:

VELON – Compact and flexible peristaltic solution, ideal for applications requiring dynamic and accurate dosing
WNPHxx Series – Integrated multi-parameter system designed for pools, spas, and wellness environments
PRISMA – High-performance pump offering maximum precision and advanced control features
WT – Complete solution for dosing biocides and inhibitors in cooling tower applications

A comprehensive range designed to cover water treatment needs across recreational, commercial, and industrial sectors.

Discover our products

PRODUCT RANGE

VELON

Velon MF

Velon PO

Velon CL

Velon PM

COMBINATION POSSIBILIES

PRISMA

COMBINATION POSSIBILIES

Peristaltic WT

Diaphragm WT

METERING PUMPS VELON

VELON is a state-of-the-art compact peristaltic dosing pump, equipped with a high-precision, electronically-controlled multifunction stepper motor that guarantees constant and regular chemical product dosing, even in demanding working conditions and with load variations. Designed to offer a complete, easy-to-use solution in all installation contexts that require precise, reliable, quiet and safe operation.

Thanks to stepper technology, it is possible to vary the rotation speed and therefore modulate dosing in real time within a range from 1% to 100%, making it ideal for environments where a wide dosage range from 18 cc/h to 12 l/h at 2 bar is required.

It is capable of controlling and automatically dosing chemicals according to the parameters detected, dynamically adapting to the needs of the system. Through a wide range of dosing modes, it is able to adapt to the most varied operational requirements of the system. Maintenance activity meters make it possible for you to schedule pipe replacement in advance based on wear, while the easy pipe change system makes the operation quick and completely safe.

The wide range of variants (MF, PO, CL, PM) offers the utmost versatility and ease of use in a variety of contexts, while multi-channel connectivity makes VELON a solution that can be adopted in any working environment. Where remote intervention is required, VELON can be accessed and managed in all its functions via the NIMBUS portal or through the MyEmec app.

Applications

This product is designed to perform across a wide range of applications:

Velon MF

Multifunctional, with an advanced interface, a complete solution for the controlled dosing of chemicals, with a particular focus on integration with monitoring systems.

Ideal for:

Installations requiring complete and customisable dosing management.
Contexts where reliability, simplicity and modernity must coexist.

SPECIFIC MODEL FEATURES

Description
Multifunction pump with extensive dosing modes
and digital management, including remote control

Interface/Control
Backlit RGB LCD display, encoder, remote
management via app/web

Working mode
Constant, CC/Pulse, PPM, %, MLQ, Batch, Volt, mA,
Pulse, Weekly Program, Ext Constant

Maintenance
Scheduled maintenance via activity meters

Inputs
MODBUS RTU, Multi-function, Level

Outputs
Alarm (optional)

Connectivity
Wi-Fi & Bluetooth

Aggiornamento Firmware Update
OTA

Velon PO

Proportional control with pH and Redox potential measuring, recommended for those seeking active and intelligent dosing management, directly connected to the values measured in the system.

Ideal for:

Swimming pool systems.
Complex systems requiring remote control and high reliability.
Intelligent management based on process parameters.

SPECIFIC MODEL FEATURES

Description

Versatile pump with proportional adjustment and remote control

Interface/Control

Backlit LCD display, encoder, remote management via app/web

Working mode
Proportional, Autodosing

Maintenance
Scheduled maintenance via activity meters

Inputs
MODBUS RTU, Standby, Level, Serial probe

Outputs
Alarm (optional)

Connectivity
Wi-Fi & Bluetooth

Aggiornamento Firmware Update
OTA

Velon CL

Simple and reliable for standard applications, recommended for those looking for a compact, easy-to-use system.

Ideal for:

Daily and routine applications without the need for digital integrations.
Quick and intuitive installations, even for non-specialised operators.
Contexts where ease of use is important.

SPECIFIC MODEL FEATURES

Description
Essential, practical pump for constant dosing with manual adjustment via potentiometer

Interface/Control
Front potentiometer, LED, ON/OFF button

Working mode
Constant

Maintenance
Scheduled maintenance via activity meters

Inputs
Level

Outputs
Alarm (optional)

Velon PM

Maximum integration with automated systems, suitable for industrial plants, automation systems and applications where digital communication (MODBUS) is essential.

Ideal for:

Industrial systems and complex plants with advanced automation requirements.
Complex systems requiring remote control and high reliability.
Intelligent management based on process parameters.

SPECIFIC MODEL FEATURES

Description
MODBUS RTU, LED, ON/OFF button

Interface/Control
Front potentiometer, LED, ON/OFF button

Working mode
External Control

Maintenance
Scheduled maintenance via activity meters

Inputs
MODBUS RTU, Level

Outputs
Alarm (optional)

WN

The WN series has been designed to offer a complete and easy-to-use solution for pool water treatment and for all applications requiring precise, reliable and quiet operation, including wellness centres and spas.

WN is a two-channel multiparameter system with temperature measurement, combining control and dosing functions in a compact all-in-one solution.

The WN series is distinguished by:

– Optimized dosing capacity through the integration of electronically controlled stepper motors. The system features two peristaltic stepper metering pumps, allowing the rotation speed – and therefore the dosing rate – to be adjusted in real time from 1% to 100%, ensuring high precision and flexibility.

– Advanced fault detection and management. The large backlit LCD display and encoder knob provide clear data visualization and intuitive menu navigation, making it easy to program operating modes, set alarms and manage the different outputs.

The WN can also be remotely monitored and controlled through the myEMEC app.

The WN series includes:

WN, a compact, all-in-one, high-precision solution integrating a control instrument and two peristaltic stepper metering pumps in a single system.

Ø 1.6x1.6 Ø 4.8x1.6

HOSE

0.018 - 1.8 l/hr 0.12 - 12 l/hr

0.0047 - 0.47 gal/hr 0.0317 - 3.17

CAPACITY RANGE

2.5 bar 36.2 PSI

PRESSURE

1-100 rpm

RPM RANGE

Applications

This product is designed to perform across a wide range of applications:

Prisma

The PRISMA dosing pump is the best solution for the highest precision dosing with extreme reliability. The versatile stepper motor and sophisticated MultiFunction software offer absolute control over dosing speeds and working modes, as well as high flexibility.

The ENCODER control knob allows easy navigation through configuration menus and control and adjustment of working parameters. The backlit display can also signal different working states: pump running; stand-by; warning; alarm.

TURNDOWN RATIO
PRISMA pumps offer extremely precise control with an incredible turndown ratio of up to 4800:1. This allows the dosing process to be subdivided up to a maximum of 4800 steps to enable the most precise and even distribution of the product to be dosed.

SLOW MODE
The Slow Mode function, when enabled, allows the suction speed to be reduced from 100% to 1% of normal speed, making priming and dosing easier, more reliable and accurate even with very viscous liquids.

PRISMA is a metering pump with a diaphragm stepper motor. The position and speed of the diaphragm are controlled by the microprocessor for the entire delivery/suction cycle.

PRISMA is equipped with Level Control, Alarms and Stand-by, while working modes include: Constant, Constant with external input, ppm, %, mlq, Pause-Work, Weekly, mA, Pulse, Volt, External Batch and Manual Batch. The included installation kit ensures the best and fastest installation.

80 lh

MAX FLOW

25 bar

MAX PRESSURE

12-24vdc 90-240vdc

POWER SUPPLY

Manual

PURGE

Applications

This product is designed to perform across a wide range of applications:

METERING PUMPS WT

The WT pump is the complete advanced solution for controlling and dosing biocides and inhibitors, which are essential for treating and disinfecting water, preventing the proliferation of bacteria and algae inside evaporative towers. The WT also integrates a corrosion and scale inhibitor dosing function, ensuring continuous protection of metal surfaces and pipes. Dosing of the biocide and inhibitor is managed proportionally on make-up water (both continuous and one-shot), timer or in proportion to the discharge time. The Lockout function ensures the utmost efficiency in chemical management, while the Safety Timer on the discharge solenoid valve guarantees that the system is always safe.

Remote management via ERMES/MYEMEC App ensures maximum flexibility and optimisation in system management.

Large LCD display with backlighting that adapts to device operation
Encoder knob for instrument control
PC+ABS box
Flow control input
Conductivity reading
– 0/3 mS – 0/30 mS (ECDINDPT)
– 0/10 mS (ECDSINDPT)
– 0/10 mS (ECDCCPT)
Temperature reading: 0 to 100°C
Independent dosing of biocide and inhibitor
Multiple dosing modes: proportional in ppm, daily/weekly timer
Lockout function

Safety timer
Alarms: level, no flow
Digital inputs can be set to N.O. or N.C.
Delayed start of dosing
Permanent data storage with system log viewable on display
Bluetooth LE / 2.4Ghz WiFi connection for APP and Remote Control
Upgradable firmware (via OTA)
Installation class II (IEC/EN 61010-1)
Pollution level 2 (IEC/EN 61010-1 and IEC 60664-1)
IP 65 protection (IEC/EN 60529)
Manual or automatic bleed
Built-in MODBUS
Vertical installation

Applications

This product is designed to perform across a wide range of applications:

Peristaltic WT (stepper)

Dual stepper motor technology combined with two long-life, low-permeability peristaltic tubes, ideal for maximum safety and precision in the dosing of biocides and inhibitors. The inverter function allows advanced chemical management in complete safety for the operator. The scheduled maintenance function minimises system downtime. Automatic water draining is managed based on the conductivity value detected, preventing the accumulation of dissolved salts and ensuring optimal chemical balance in the cooling water circuit.

Motor and accessories

2 stepper motors continuously adjustable between 1 and 25 rpm
Long-life peristaltic tubes (TPV)

100 to 240 VAC

POWER SUPPLY

Ø 1.6x1.6 Ø 4.8x1.6

HOSE

2(29) bar (psi)

PRESSURE

1-25 rpm

RPM RANGE

0.018-0.45 l/h 0.12 - 3 l/h 0.0047 - 0.1175 gal/h 0.0317 -0.7925 gal/h

CAPACITY RANGE

Diaphragm WT (solenoid)

The diaphragm version is an advanced solution for an extremely wide range of chemical dosing applications in evaporative towers thanks to its wide flow/pressure range. It is equipped with solenoid-operated diaphragm movement with hydraulic parts in PVDF with high chemical resistance. Integrated functions include manual or automatic bleed, standby mode, and delayed start of dosing.

Motor and accessories

Double magnet with 45 pulses/min, continuously adjustable (1% – 100%)
Valves with double ball
Standard hydraulic parts in PVD

115 VAC - 230 VAC

POWER SUPPLY

up to 3 l/h up to 0.79 gal/h

CAPACITY RAGE

up 2 bar

PRESSURE

45 pulses/min

NUMBER OF STROKES

/ products /

Related products

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Disinfection

Protecting water quality requires accurate, continuous and reliable disinfection. EMEC solutions combine dosing, measurement and control technologies to support safe and efficient water management across a wide range of applications.

Wastewater

Wastewater treatment is a key process for reducing the environmental impact of domestic, industrial and municipal activities, while also protecting water resources and enabling the sustainable reuse of water in a context where freshwater is becoming an increasingly valuable resource.

Spas, Hotel and Resort

EMEC systems guarantee efficiency while ensuring the protection of health and the environment in all water treatment applications.