There is described a method for controlling a liquid delivery system adapted to deliver a liquid in a container, comprising: receiving a desired temperature for a liquid to be delivered and a desired level of liquid within the container; adjusting a mixing valve connected to a source of hot liquid and a source of cold liquid to obtain the desired temperature; operating a flow control valve for delivering the liquid having the desired temperature and closing a drain closure system of the container and closing a drain closure device; monitoring a level of the liquid within the container; and closing the flow control valve when the monitored level of liquid substantially corresponds to the desired level of liquid.

A method for operating a mixing apparatus of a manufacturing plant comprises supplying multiple powdered products to the mixing apparatus. An inlet mass flow rate of the multiple powdered products into the mixing apparatus and a weight of the multiple powdered products in the mixing apparatus are measured. The multiple powdered products in the mixing apparatus are mixed to form a mixed product. The weight of the multiple powdered products in the mixing apparatus and an outlet mass flow rate of the mixed product from the mixing apparatus are predicted based on the measured inlet mass flow of the multiple powdered products. The predicted outlet mass flow rate of the mixed product from the mixing apparatus is corrected based on the measured weight of the multiple powdered products in the mixing apparatus. The mixed product is processed into final products

A method for operating a mixing apparatus of a manufacturing plant comprises supplying multiple powdered products to the mixing apparatus. An inlet mass flow rate of the multiple powdered products into the mixing apparatus and a weight of the multiple powdered products in the mixing apparatus are measured. The multiple powdered products in the mixing apparatus are mixed to form a mixed product. The weight of the multiple powdered products in the mixing apparatus and an outlet mass flow rate of the mixed product from the mixing apparatus are predicted based on the measured inlet mass flow of the multiple powdered products. The predicted outlet mass flow rate of the mixed product from the mixing apparatus is corrected based on the measured weight of the multiple powdered products in the mixing apparatus. The mixed product is processed into final products

A method and system for correcting mass flow rate measurements relating to a conveyor used to move a stream of first component material portions to and through a mixing station in which a second component material is dispensed in a predetermined mass percentage of the mass of the first component material portions. The correction of the measurements is adapted to correct for inaccuracies that arise in the measurements due to, for example, differences in the first component material portions properties, differences in the second component material properties, environmental conditions, drift of electronic instruments, and changing conditions that occur during extended use of an upstream conveyor that delivers first component material portions to the mixing station.

A gravimetric metering device which is provided to add an additive material to a polymer material, includes: a hopper to contain the additive material, a supply member to transport the additive material discharged from the hopper towards the polymer material, and first and a second weighing elements to detect the weight of the additive material discharged from the gravimetric metering device.

A control unit determines, on the basis of the weight detected by the first weighing element, the flow rate of additive material discharged from the gravimetric metering device by regulating the supply member and controls the operation of the first weighing element by means of the second weighing element by comparing, at the start and at the end of a cycle for charging the hopper with the additive material, the weight detected by the first weighing element with the weight detected by the second weighing element.

A gravimetric metering device which is provided to add an additive material to a polymer material includes a hopper which to contain the additive material and a supply member which is provided downstream of the hopper in order to receive the additive material which is discharged from the hopper and to transport it towards a discharge opening which is connected to the polymer material, and a first and second weighing element which are provided to detect the weight of the additive material which is discharged from the gravimetric metering device.

The first weighing element is configured to detect a weight within a first maximum weighing range while the second weighing element is configured to detect a weight within a second maximum weighing range different from the first maximum weighing range.

A combination weighing apparatus (1) according to an embodiment has a control unit (51) that performs combination calculation based on a plurality of weight values acquired by acquisition units (7.sub.1 to 7.sub.n) and discharges a combination of articles having a preset target weight value from hoppers (6.sub.1 to 6.sub.n); a discharge chute (9) that receives the articles discharged from the hoppers (6.sub.1 to 6.sub.n), has a conveyance surface (9B) having a plurality of openings (9D) smaller than the article, and discharges the articles downstream while sliding the articles on the conveyance surface (9B); and a moisture recovery mechanism (20) that is disposed below the openings in the discharge chute (9) and recovers moisture passing through the openings (9D) in the discharge chute (9) from an inside to an outside of the conveyance surface (90) and falling from the discharge chute (9).

A combination weighing apparatus (1) according to an embodiment has a control unit (51) that performs combination calculation based on a plurality of weight values acquired by acquisition units (7.sub.1 to 7.sub.n) and discharges a combination of articles having a preset target weight value from hoppers (6.sub.1 to 6.sub.n); a discharge chute (9) that receives the articles discharged from the hoppers (6.sub.1 to 6.sub.n), has a conveyance surface (9B) having a plurality of openings (9D) smaller than the article, and discharges the articles downstream while sliding the articles on the conveyance surface (9B); and a moisture recovery mechanism (20) that is disposed below the openings in the discharge chute (9) and recovers moisture passing through the openings (9D) in the discharge chute (9) from an inside to an outside of the conveyance surface (90) and falling from the discharge chute (9).

A method for measuring feed flow, feed is moved through a flexible pipe using a flexible auger operably positioned within the pipe. Feed flow through a metered section (309) of the flexible pipe is metered using a feed meter (304) attached to the flexible pipe. The feed meter includes load cell (312) configured to detect strain induced by feed mass within the metered section (309). Metering feed includes providing a measure of mass flow of the feed, using the load cell (312), when the feed moves through the metered section (309).

A method for measuring feed flow, feed is moved through a flexible pipe using a flexible auger operably positioned within the pipe. Feed flow through a metered section (309) of the flexible pipe is metered using a feed meter (304) attached to the flexible pipe. The feed meter includes load cell (312) configured to detect strain induced by feed mass within the metered section (309). Metering feed includes providing a measure of mass flow of the feed, using the load cell (312), when the feed moves through the metered section (309).