vanzari@infinitrade-romania.ro
+40 371 232 404|Mon - Fri: 08:00 - 16:30 (Romania time)
Infinitrade Romania – industrial equipment supplier in Romania

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    Equipment for Water Treatment

    Water treatment and wastewater plants need equipment that withstands continuous operation, fluids containing solids and sometimes corrosive media, with IP68 protection for submersible pumps. We quote submersible pumps, side channel blowers for aeration, dosing pumps, knife gate valves and SCADA automation. For a quote by code, send the required flow rate, the pumping head and the type of fluid.

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    Applications

    • Drinking water treatment plants
    • Municipal and industrial wastewater treatment plants
    • Sludge dewatering and treatment
    • Aeration of biological tanks
    • Reagent dosing and coagulation

    Equipment we supply for water treatment and wastewater

    • Submersible pumpsFor pumping stations, drainage and sewerage - resistant to solids
    • Side channel blowersAeration of biological tanks, oil-free, reliable
    • Dosing pumpsPrecise dosing of chlorine, coagulant and lime
    • Knife gate valvesFor sludge and wastewater containing solids
    • Progressive cavity pumpsFor thick sludge and difficult fluids
    • Level and flow sensorsUltrasonic, radar, electromagnetic - for tanks, pipes and open channels
    • SCADA automationPLCs, HMI panels and communication for plant monitoring

    Brands often requested

    • Grundfos
    • Wilo
    • Becker
    • FPZ
    • WIKA
    • Schneider Electric

    Frequently asked questions

    How do I choose a submersible pump for wastewater containing solids?

    The main criterion is the free passage diameter - for domestic wastewater with ordinary solids, at least 65-80 mm; for plants with a higher content of solid waste, we recommend a vortex or wide-channel impeller, which reduces the risk of clogging compared with a conventional closed impeller. The impeller material matters: hardened cast iron for sand and abrasive particles. Also check the motor power against the plant's load curve (H-Q) and whether the installation needs Ex certification for chambers where gases (methane, H2S) may accumulate. Send the required flow rate and pumping head for sizing.

    What is the difference between a side channel blower and a Roots blower for aerating biological tanks?

    A side channel blower suits low to medium flow rates and pressures up to about 0.5-0.8 bar, runs oil-free, is compact and needs little maintenance - the typical choice for small and medium plants. A Roots (lobe) blower covers higher flow rates and pressures and is more efficient at constant high loads, but needs a more complex control panel and a dedicated noise attenuator. For biological tanks with variable oxygen demand, a variable frequency drive on the blower reduces energy consumption compared with simple on/off operation.

    Which valve should I choose for sludge lines or water with a high solids content?

    The knife gate valve is designed specifically for this type of fluid: the blade crosses the line and can cut through fibres or particles without preventing full closure, unlike a standard ball or butterfly valve, which would clog quickly. Choose the bidirectional sealing version if pressure can come from both directions, and a cast iron or stainless steel body depending on how aggressive the fluid is. For dewatered or very viscous sludge, we also recommend progressive cavity pumps upstream, able to move high-consistency fluids without losing flow.

    Which sensors are needed to automate a wastewater treatment plant?

    A typical plant uses level sensors (ultrasonic or radar) for tanks and pumping chambers, electromagnetic flow meters for water and sludge, and level sensors for open channels or measuring weirs. The data is centralised in a SCADA system with a PLC and HMI panel, which automatically controls pump start/stop, reagent dosing and aeration according to the biological load. In areas with a risk of explosive gases (closed chambers, deep pumping stations), the sensors and cabling must be ATEX certified. We can propose an automation architecture starting from the diagram of your existing plant.

    How long does delivery of a submersible pump or a critical spare part take?

    For common models, the lead time is 24–72 h when the item is available locally or at the supplier - important for plants where a failure means a risk of uncontrolled discharge. For specialised equipment (large-capacity blowers, dedicated progressive cavity pumps, customised SCADA components), made to order, usually 1–4 weeks; it may take longer depending on the brand and the specifications. If you have an operational emergency, call us or send the code - we check availability and give you the lead time.

    Other industries we supply

    Updated: 2026-11-12