Dositec DOSTEC® 50-1000 High Volume Piston Chemical Injection Pump

The DOSTEC® 50 is a heavy-duty, high-precision dosing pump designed for dosing liquid products into hydraulic systems. It is suitable for water treatment, chemical processing, food, textile and industrial applications.

Yes. The DOSTEC® 50 is available in both piston and diaphragm configurations. The piston range covers approximately 330 to 1200 L/h, while the diaphragm range covers approximately 207 to 1080 L/h, depending on the selected model.

Pressure depends on the selected model. Piston models are available up to 12 bar, while diaphragm models are available up to 10 bar, with lower pressure ratings on higher-flow models.

The DOSTEC® 50 uses a micrometric regulator to adjust dosing flow from 0% to 100% of pump capacity. The manual notes that regulation below 10% is not recommended. Flow can also be adjusted using an inverter, allowing dosing control from 10% to 100%.

The DOSTEC® 50 is available with three-phase 230/400V 50/60Hz and single-phase 230V 50Hz motor options. The motor power is 0.74 kW / 1 HP.

The DOSTEC® 50 can be supplied with wetted materials including PP, PVDF and SS 316. Piston materials include PEUHMW, PVDF and SS 316, while diaphragm models use an elastomer base reinforced with fibre and PTFE covering.

The DOSTEC® 50 uses 1¼" connections, with 1¼" NPT also available depending on the selected configuration.

The hydraulic installation should include a 150 micron suction filter, injection check valve, safety relief valve, pressure gauge and, where required, a pulsation dampener, pressure regulating valve, flowmeter and calibration cylinder. The safety relief valve should be installed as close as possible to the pump to protect the system from overpressure.

Suction lift depends on the selected model. Some DOSTEC® 50 models are rated up to 9 metres / 30 feet, while larger high-flow models may have lower suction lift. The suction lift rating is based on the dosing head and suction pipe being full, tested with water at 20°C.

The oil should be changed after the first 500 hours, then every 2000 hours or at least once per year. The piston, seals, diaphragm, bellows and valves should be checked every 3 months or 1000 hours, and the suction filter should be checked monthly.