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Grundfos DMX 280-8 Mechanical Dosing Pump 280 L/h 8 Bar
Grundfos DMX 280-8 Mechanical Dosing Pump 280 L/h 8 Bar
The Grundfos DMX 280-8 is a robust mechanical diaphragm dosing pump delivering up to 280 L/h at 8 bar. It features a PVC dosing head, PTFE-coated diaphragm, ceramic valve balls and manual stroke-length adjustment. Ideal for water treatment, chemical dosing, pH adjustment and demanding industrial process applications.
Vendor: Grundfos
Unavailable
KEY FEATURES
- Approx. 280 L/h nominal dosing capacity at 50 Hz
- 8 bar maximum operating pressure
- Robust positive displacement diaphragm dosing pump
- Mechanically coupled diaphragm drive
- PVC dosing head
- Long-life PTFE-coated diaphragm
- Ceramic (Al₂O₃) valve balls
- PTFE/composite valve seats
- FKM/rubber valve gaskets
- Single ball valve design
- Handles liquids up to 150 mPa·s viscosity
- Manual stroke-length adjustment with 10:1 adjustment ratio
- Robust aluminium pump housing
- Standard inlet and outlet non-return valves
- 19/27 and 20/25 connection size options
- Maximum suction lift during operation of 3 m
- 3 × 230/400 V, 50 Hz three-phase motor
- 0.4 kW power input
- IP65 enclosure rating
- CE, EAC and CNROHSEX approvals
The Grundfos DMX 280-8 is a versatile positive displacement diaphragm dosing pump designed for reliable higher-capacity chemical dosing in demanding industrial and process applications. Its robust aluminium construction, mechanically coupled diaphragm drive and straightforward capacity adjustment provide dependable dosing performance.
The diaphragm is mechanically 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 liquid end incorporates single ball valves, while the robust industrial construction is designed for reliable operation in demanding process environments.
This configuration features a PVC dosing head, long-life PTFE-coated diaphragm, ceramic Al₂O₃ valve balls, PTFE/composite valve seats and FKM/rubber valve gaskets. With a nominal dosing capacity of 280 L/h, maximum operating pressure of 8 bar and compatibility with liquids up to 150 mPa·s viscosity, the pump provides dependable performance for compatible industrial and chemical dosing applications.
ADDITIONAL FEATURES
- Long-life PTFE-coated diaphragm
- Mechanically coupled diaphragm design
- Easy-to-install and operate design
- Robust aluminium enclosure
- Optimum capacity and stroke-frequency graduation
- Dosing flow variation ±1.5% (FS)
- Linearity ±4% (FS)
- Single ball valve design
- 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 bar
- Maximum suction lift during operation of 3 m
- Liquid temperature range from 0 to 40 °C
- Standard control variant
- Not prepared for VFD operation
- IP65 motor enclosure
APPLICATIONS
- Process engineering, water treatment, wastewater treatment, industrial chemical dosing, chemical treatment, disinfection, pH adjustment and other compatible applications requiring reliable chemical metering at pressures up to 8 bar.
PRODUCT PACKAGE INCLUDES
- Grundfos DMX 280-8 Mechanical Dosing Pump
SPECIFICATIONS
| Specification | Details |
|---|---|
| Product Name | Grundfos DMX 280-8 |
| Product Number | 99206036 |
| Model / Configuration | DMX 280-8 B-PVC/V/C-X-E1U3U3XEMAG |
| EAN Number | 5712608671067 |
| Pump Type | Positive displacement diaphragm dosing pump |
| Diaphragm Drive | Mechanically coupled |
| Nominal Flow Rate | 280 L/h at 50 Hz (approx. 73.97 US GPH) |
| Maximum Operating Pressure | 8 bar (approx. 116.0 psi) |
| Number of Dosing Heads | 1 |
| Maximum Viscosity | 150 mPa·s |
| Pump Housing | Aluminium |
| Dosing Head Material | PVC |
| Diaphragm | PTFE-coated |
| Valve Ball Material | Ceramic (Al₂O₃) |
| Valve Seat Material | PTFE / Composite |
| Valve Gasket Material | FKM / Rubber |
| Valve Configuration | Single ball valves |
| Inlet Non-Return Valve | Standard |
| Outlet Non-Return Valve | Standard |
| Inlet Connection | Connection pack |
| Outlet Connection | Connection pack |
| Connection Sizes | 19/27, 20/25 |
| Maximum Permissible Inlet Pressure | 0 bar |
| Maximum Suction Lift During Operation | 3 m |
| Liquid Temperature Range | 0 to 40 °C |
| Power Input (P1) | 0.4 kW (approx. 0.536 HP) |
| Rated Voltage | 3 × 230/400 V |
| Mains Frequency | 50 Hz |
| Maximum Frequency | 50 Hz |
| Enclosure Class | IP65 |
| Control Variant | Standard |
| Frequency Converter | Not prepared for VFD |
| Cable Included | No |
| Power Plug | No plug |
| Diaphragm Leakage Detection | No |
| Net Weight | 18 kg (approx. 39.7 lb) |
| Gross Weight | 29.3 kg (approx. 64.6 lb) |
| Shipping Volume | 0.156 m³ |
| Approvals | CE, EAC, CNROHSEX |
| Country of Origin | Germany (DE) |
| Custom Tariff Number | 8413509060 |
ADDITIONAL RESOURCES
PRODUCT BROCHURE
Additional information about Grundfos DMH Mechanical Dosing Pumps are outlined in the DMH product brochure.
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PRODUCT INFORMATION SHEET (PIS)
Detailed information about the product, is provided in the product information sheet below.
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