Injection into a live main,
without an injection pump.
A chemical injection valve meters into a pressurised main under process control. Solenoid actuated, driven from your signal, with the body and elastomer chosen for the duty.
The case for change
Why injection points are where dosing fails
The injection point is the hardest place in a dosing system. It sits on a live main, it is the last thing anybody wants to break into, and it is where an injection pump’s check valves and lance have to work against full line pressure. When that assembly fouls or leaks back, the process loses its dose and the fix means work on a pressurised main.
Pulsation errors costing you compliance
Stroke-based pumps create pulsation at low flows, causing dosing inaccuracy, downstream mixing problems, and dose logs that cannot be defended in an audit.
Tubing failures and unplanned downtime
Peristaltic tubing splits under chemical exposure. Every failure means a reactive call-out, replacement parts, and a window where dosing has stopped entirely.
High maintenance across multiple failure points
Check valves, diaphragms, tubing, and motors all need regular servicing. Each failure point is a separate maintenance task and a separate cost line.
Accuracy drift as components wear
Pump accuracy degrades as internals wear. The further from original design point, the worse the drift, and the harder it is to keep dose logs within spec.
Engineering architecture
Four precision advantages inside every MAC Liquid Bullet Valve
Hover each capability to see the system respond in real time.
Dual D-Flex Diaphragm
Media contacts only the diaphragm faces and valve body. No sliding seals, no o-ring rub, no tubing in the flow path. Chemical isolation by design.
Balanced Poppet
Upstream pressure variation is equalised at the seat. Dosing volume per pulse stays consistent regardless of supply fluctuations, over the full life of the valve.
High-Speed Solenoid Actuation
On/off switching, pulse-width modulation, or proportional control. Fast cycling creates near-continuous micro-dosing from a valve-sized footprint.
Manifold Integration
A single block serves multiple dosing channels from one connection point, replacing the wiring, tubing, and floor space of individual pump assemblies.
Smart dosing integration
How AQUAIOT connects MAC valves to your water system
From sensor input to auditable dose log, in four steps.
Monitor
AQUAIOT sensors measure flow, conductivity, and water quality in real time. Data streams to the edge controller continuously.
Decide
Cloud logic and local edge rules calculate the dosing requirement against set-points, flow conditions, and time windows.
Dose
The MAC LBV fires precise solenoid pulses. Pulse width, frequency, and duration are all configurable from the AQUAIOT dashboard.
Prove
Every injection event is logged with timestamp, volume and sensor context, so a process engineer can tie a quality excursion back to what was injected and when.
Integration and control
Built for your existing infrastructure
SCADA and BMS
MODBUS RS485 and API connections. Direct integration with existing control systems without replacing your architecture.
Closed-loop dosing
Flow, conductivity, or quality sensor feedback adjusts dosing in real time. No manual trim, no operator intervention.
Compliance logging
Timestamped injection records tied to process conditions. Exportable evidence for process quality reporting and incident review.
4G and LoRaWAN
Secure cellular telemetry. Encrypted payloads, over-the-air configuration, remote firmware updates.
PWM and proportional
On/off pulse, pulse-width modulation, or 0-10V / 4-20mA proportional control from one valve platform.
Cloud dashboard
Trendlines, alarms, analytics, role-based access, and data export from the AQUAIOT platform.
Injection duty
Where chemical injection fits
Process and industrial lines where chemical has to go into a main that is already live. Part of the full chemical dosing valve range.
Injection into a live main
The injection point carries full line pressure, which is where an injection pump’s check valves and lance foul, leak back and quietly cost the process its dose.
The valve meters into that pressure instead of fighting it, with the poppet holding volume per pulse as the main moves through the shift.
Pressurised mainChemical metering valve
A repeatable dose per pulse from the balanced poppet, counted and logged.
MeteringPump free chemical dosing
Dose into an existing pressurised line, with no pump and far fewer wear parts.
ArchitectureTechnical overview
BV214 and BV221: full technical reference
| Parameter | BV214 | BV221 |
|---|---|---|
| Body size | 14mm | 21mm |
| Flow range | Micro to low L/min | Low to mid L/min |
| Max pressure | ~8 bar (app. dep.) | ~10 bar (app. dep.) |
| Actuation | Solenoid: on/off, PWM | Solenoid: on/off, PWM |
| Elastomers | PTFE, FKM, EPDM | PTFE, FKM, EPDM |
| Temp. range | 0 to 80°C | 0 to 80°C |
| Manifold | Single / multi-channel | Single / multi-channel |
| Connection | G-thread / custom | G-thread / custom |
| Media | Water, fertilisers, detergents, reagents, gases | |
| Control signal | On/off, PWM, proportional (0-10V / 4-20mA) | |
| ATEX variants | Available, contact us with zone classification | |
Exact specifications depend on body, orifice, and elastomer selection. Contact us for application-specific sizing and ATEX requirements.
Why choose AQUAIOT
Factory-authorised. Engineering-supplied. UK-stocked.
Authorised MAC Valves UK and Ireland distributor
As part of PSI Technologies, AQUAIOT holds factory-backed authorisation. We specify, stock, and support MAC dosing valves across the UK and Ireland.
Our engineers configure every build
Bespoke valve selection for unusual media, pressure, or manifold requirements. P&ID review included.
UK stock and rapid supply
Standard configurations held in UK inventory for rapid dispatch. No lengthy lead times on core SKUs.
End-to-end delivery
Hardware specification, IoT integration, cloud dashboard, commissioning, and ongoing support all from one team.
Open and interoperable
SCADA, BMS, CAFM, and AQUAIOT ecosystem integration via MODBUS, RS485, and API. No lock-in.
AQUAIOT operates as part of PSI Technologies, making us the exclusive MAC Valves partner for liquid dosing applications in the UK and Ireland. Every solution combines factory-authorised valve hardware with AQUAIOT IoT integration, cloud dashboards, and our own engineering team on every project.
- Factory-authorised MAC Valves supply and specification
- AQUAIOT IoT integration included as standard
- UK-held stock for standard configurations
- Engineering team covers design, install, and commissioning
- Cloud monitoring, audit logging, and SCADA integration
- Post-installation support and remote diagnostics
Common questions
Chemical injection valve questions
Get started
Discuss your injection point
Tell us the main, the chemical, the injection rate and the pressure at the tapping. Our engineers will specify the MAC build and the control around it.
Prefer to call? 02392 233611 · Full contact page
Chemical injection valve. Meters into a live pressurised main, driven from your process signal. UK-stocked by AQUAIOT.
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