Abstract: A device for taking powder material into liquid including an inlet to which fluidized powder is supplied with a first pressure, an outlet into a liquid tank having a second pressure less than the first pressure, a powder material intake from the inlet to the outlet, a valve for the powder material intake, and a gaseous medium intake with an outlet into the powder intake with a pressure higher than the second pressure, wherein the outlet of the gaseous medium intake is in the powder material intake downstream from the valve. A method including: applying a vacuum or low pressure to the liquid, passing powder material into the liquid through a powder material intake, providing a valve in the powder material intake, and supplying a pressurized gaseous medium into the powder material intake downstream the valve at least partially during closing and/or opening the valve.

Abstract: A food product heat treatment apparatus for heat-sensitive fluid food products, including an inlet for supplying the food product, an outlet for discharging the heat treated food product, a holding device downstream the inlet for holding the food product a specific time at a specific temperature, and a back pressure device downstream the holding device, wherein the holding device is a positive displacement holding device and/or a self cleaning holding device. A method for heat treating a heat-sensitive fluid food product, including supplying the food product to an inlet, heat treating the food product by holding the food product a specific time at a specific temperature in a holding device, providing a back pressure device downstream the holding device, and discharging the heat treated food product through an outlet, wherein the back pressure device includes a cooled valve and/or the food product is positively displaced through the holding device.