12-55 Permanent Magnet Variable Frequency Constant Pressure Centrifugal Pump is a reliable and efficient water pressure booster pump, using permanent magnet brushless motor, precision pressure sensor, combined with advanced electronic control technology, the intelligent frequency conversion, constant voltage speed regulation, energy saving and high efficiency are realized. Technical Specifications Parameter Specification Model MKAWA BHM 12-55 VFD Pump Type Horizontal Stainless Steel Multistage Centrifugal Pump Motor Power 3 HP (2.2 kW) Motor Type Permanent Magnet IE5 Control Built-in Intelligent VFD with PID Maximum Flow 12 m³/hr Maximum Head 55 m Voltage 220–240 V Single Phase or 380–415 V Three Phase (variant dependent) Frequency 50/60 Hz Maximum Working Pressure Up to 6–10 bar (depending on system design) Protection Class IP54/IP55 Insulation Class F Liquid Temperature Up to 70°C Control Signal Internal PID / External 4–20 mA Pressure Transmitter (where applicable) Key Features Intelligent VFD with constant-pressure PID control Permanent Magnet IE5 motor for high efficiency Automatic speed regulation based on water demand Soft start and soft stop Dry-run protection Overload, over-voltage, and under-voltage protection Low-noise operation Automatic sleep and wake-up mode Reduced energy consumption compared with fixed-speed pumps Typical Applications Large apartment complexes Hotels and hospitals Commercial buildings Industrial process water RO and DM water treatment plants HVAC circulation Pressure boosting from underground or overhead tanks Typical Performance Parameter Value Rated Flow 12 m³/hr Maximum Head 55 m Motor Rating 3 HP (2.2 kW) Recommended Operating Pressure 3.5–5.5 bar Duty Continuous (S1) Recommended Applications System Capacity Recommended Pump 250–500 LPH RO Plant BHM 4-20 VFD 500–1000 LPH RO Plant BHM 5-40 VFD 1–5 m³/hr Process Water BHM 8-55 VFD 5–12 m³/hr Process Water / Large RO Plant BHM 12-55 VFD For larger installations requiring redundancy and higher capacity, MKAWA also offers the BHM 12-55SET Twin Pressure Booster, which uses two 3 HP pumps with automatic duty/standby or duty/assist operation for continuous pressure and backup capability. If you're preparing technical documents for clients, I can also create: A professional technical datasheet (PDF/Word) A performance curve A GA (General Arrangement) drawing A P&ID A control panel wiring diagram for the MKAWA BHM 12-55 VFD booster pump.

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8-55 Permanent Magnet Variable Frequency Constant Pressure Centrifugal Pump is a reliable and efficient water pressure booster pump, using permanent magnet brushless motor, precision pressure sensor, combined with advanced electronic control technology, the intelligent frequency conversion, constant voltage speed regulation, energy saving and high efficiency are realized. Typical Technical Specifications Parameter Specification Model MKAWA BHM 8-55SET Twin Booster Pump Configuration 2 × BHM 8-55 VFD Pumps Motor Rating 2 HP (1.5 kW) each Total Installed Power 3.0 kW Pump Type Horizontal Stainless Steel Multistage Control Intelligent VFD with PID Constant Pressure Maximum Flow Up to 8 m³/hr (per pump model rating) Maximum Head 55 m Supply Voltage 230 V Single Phase or 415 V Three Phase (variant dependent) Frequency 50/60 Hz Motor Permanent Magnet IE5 Efficiency Protection Dry Run, Overload, Over/Under Voltage, Phase Protection Control Mode Lead-Lag (Duty/Standby) or Duty/Assist Pressure Feedback Pressure Transmitter (typically 4–20 mA) Noise Level Low-noise operation Standard Features Twin-pump automatic operation. Constant pressure using PID control. Automatic duty pump alternation for equal running hours. Automatic assist pump start during peak demand. Soft start and soft stop. Energy-saving VFD operation. Dry-run, overload, and voltage protection. Suitable for continuous operation. Typical Applications High-rise apartments Hotels and resorts Hospitals Commercial buildings Industrial process water RO and DM plants Water distribution systems Irrigation systems Typical Operating Logic Condition Pump Operation Low demand Pump-1 operates with VFD Increased demand Pump-2 starts automatically to assist Demand decreases Pump-2 stops; Pump-1 continues Next cycle Pump-2 becomes the lead pump (automatic alternation) Pump fault Healthy pump continues automatically Standard Accessories Common suction and discharge manifold Two non-return valves Two isolation valves Pressure transmitter (4–20 mA) Pressure gauge Diaphragm pressure tank (24–100 L depending on system) Integrated VFD control panel For your RO and water treatment projects, the BHM 8-55SET is suitable where: Flow demand is 8–16 m³/hr. Constant pressure of 3.5–5.5 bar is required. Continuous operation with automatic standby backup is needed. Energy-efficient operation is important. If you are preparing a customer proposal, I can also create a professional technical datasheet, GA drawing, P&ID, and control panel wiring diagram for the MKAWA BHM 8-55 VFD Twin Pressure Booster Set.

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5-40 Permanent Magnet Variable Frequency Constant Pressure Centrifugal Pump is a reliable and efficient water pressure booster pump, using permanent magnet brushless motor, precision pressure sensor, combined with advanced electronic control technology, the intelligent frequency conversion, constant voltage speed regulation, energy saving and high efficiency are realized. Typical Technical Specifications Parameter Specification Model MKAWA BHM 5-40 VFD Pump Type Horizontal Stainless Steel Multistage Centrifugal Pump Motor Power 1.5 HP (1.1 kW) Motor Type Permanent Magnet IE5 Motor Voltage 220–240 V AC, Single Phase, 50/60 Hz VFD Built-in Intelligent Variable Frequency Drive Maximum Flow 5 m³/hr Maximum Head 40 m Maximum Working Pressure Approx. 6 bar Inlet/Outlet 1¼“ BSP Protection Class IP54/IP55 (model dependent) Insulation Class F Control Method PID Constant Pressure Control Pressure Sensor Integrated / External 4–20 mA compatible Liquid Temperature Up to 70°C Ambient Temperature Up to 40°C Main Features Built-in VFD with automatic speed control True constant water pressure Up to 50% energy savings Soft start and soft stop Dry-run protection Overload, over-voltage, and under-voltage protection Ultra-quiet operation (approximately 36 dB) Automatic sleep/wake function based on water demand Suitable for continuous operation Applications RO Water Treatment Plants DM Plants Apartments Hotels Villas Commercial Buildings Pressure Boosting Systems Irrigation Systems Process Water Distribution Recommended Operating Pressure Application Pressure Setting Residential 2.5–3.0 bar Apartments 3.0–3.5 bar RO Plant Feed 3.5–4.0 bar Industrial Process 4.0–5.0 bar Since you've previously been working on MKAWA VFD booster pumps for RO and DM plants, the BHM 5-40 VFD is well suited as a feed booster for systems up to approximately 5 m³/hr where constant pressure is required.

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