Automatic Flow-Controlled Pump — Model Range

Choosing an HQC or TQC Automatic Flow-Controlled Pump

The HQC and TQC series are downward-pressurisation pumps intended to be installed below a gravity water tank or tower. Instead of a pressure tank and pressure switch, they start automatically when water is drawn and flow begins, increase the pressure at the outlets, and stop when demand ends. Because they rely on the head from the tank above, they run only with positive pressure at the inlet, and the pump must sit at least 0.5 m lower than the water tower.

Both series come in three sizes: the 200 at 0.18 kW, the 400 at 0.37 kW and the 800 at 0.75 kW, all single phase with 1 inch inlet and outlet. At 50Hz the HQC range delivers maximum pressures of 2.4 to 3.3 kg/cm² and maximum flows of 55 to 110 L/min, while the TQC range gives 2.2 to 3.5 kg/cm² and 45 to 95 L/min. 60Hz models run on 110/220 V; the TQC800 at 60Hz reaches the highest listed pressure of 4.4 kg/cm².

Choose by the number of outlets in use at the same time and the pressure you need at the highest outlet. If there is no tank above the pump, or the inlet sees suction, consider an automatic booster or electronic control pump instead.

• Typical uses: houses and small buildings fed from a roof tank or water tower
• Compact, quiet design with built-in thermal overload protection
• Compare models and request a quote from Valvenok's UK team