KEY FEATURES

• Approx. 403 L/h nominal dosing capacity at 50 Hz
• 10 bar maximum operating pressure
• Dual-head configuration with 2 dosing heads
• Robust positive displacement diaphragm dosing pump
• PVDF dosing heads
• PTFE/composite valve balls
• PTFE/composite valve seats
• PTFE/composite valve gaskets
• Long-life PTFE diaphragms
• Handles liquids up to 100 mPa·s viscosity
• Manual stroke-length adjustment with 10:1 adjustment ratio
• Standard inlet and outlet non-return valves
• Connection pack with 19/27 and 20/25 connection sizes
• 3 × 230/400 V, 50 Hz three-phase motor
• 0.6 kW power input
• IP55 enclosure rating
• CE, EAC and CNROHSEX approvals

The Grundfos DMH 403-10D is a robust dual-head positive displacement diaphragm dosing pump designed for reliable chemical dosing in demanding industrial and process applications. This configuration combines two dosing heads with a nominal dosing capacity of 403 L/h at 50 Hz and a maximum operating pressure of 10 bar.

The diaphragms are hydraulically coupled through a precise gear-eccenter-tappet system to a high-efficiency AC motor. Dosing capacity can be adjusted by varying the stroke length using the stroke adjustment knob, providing an adjustment ratio of 1:10. The dual-head arrangement provides a versatile dosing solution while retaining the robust mechanical design of the Grundfos DMH range.

This configuration features two PVDF dosing heads, long-life PTFE diaphragms, PTFE/composite valve balls, PTFE/composite valve seats and PTFE/composite valve gaskets. With compatibility for liquids up to 100 mPa·s viscosity and a liquid temperature range from -10 to 60 °C, the pump provides dependable performance for compatible industrial and chemical dosing applications.

ADDITIONAL FEATURES

• Dual-head design with 2 dosing heads
• Long-life PTFE diaphragms
• Easy-to-install and operate design
• Aluminium pump housing
• Optimum capacity and stroke-frequency graduation
• Dosing flow variation ±1.5% (FS)
• Linearity ±2% (FS)
• Standard inlet non-return valve
• Standard outlet non-return valve
• Connection pack for inlet and outlet
• Connection sizes: 19/27 and 20/25
• Maximum permissible inlet pressure of 0.8 bar
• Liquid temperature range from -10 to 60 °C
• Standard control variant
• Not prepared for VFD operation
• IP55 motor enclosure

APPLICATIONS

• Process engineering, water treatment, wastewater treatment, industrial chemical dosing, chemical treatment, disinfection, pH adjustment and other applications requiring reliable chemical metering at pressures up to 10 bar.

PRODUCT PACKAGE INCLUDES

• Grundfos DMH 403-10D Dual Head Mechanical Dosing Pump

SPECIFICATIONS

ADDITIONAL RESOURCES

PRODUCT BROCURE

Additional information about Grundfos DMH Mechanical Dosing Pumps are available in the DMH product leaflet.

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DATASHEET

Detailed specifications for the Grundfos DMH 403-10D Dual Head Dosing Pump 403 L/h 10 Bar are available in the datasheet below.

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Additional technical data about the Grundfos DMH Mechanical Dosing Pumps are available in the product datasheet.

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