A submersible agitator device for circulating drinking water includes a submersible motor including a cylindrical housing, from one end of which there extends a shaft, a hyperboloid agitator mounted on the shaft, a frame with a plurality of supports extending along the housing and connected to the housing, wherein the supports have radially outwardly angled bend portions, which extend over a peripheral edge of the hyperboloid agitator body in order to support the frame on a base, and a flow-guiding element, which is annular in plan view and which is mounted on the bend portions of the supports.

An immersion mixer includes: a housing; a drive motor residing within the housing; a shaft attached to the motor and configured to rotate relative to the housing; blades attached to and rotatable with the shaft; a handle attached to the housing, the handle including a first segment and a second segment attached to the first segment and to the housing; and a trigger attached to the handle and operatively associated with the motor. The trigger includes a first segment that is generally parallel with the first segment of the handle and a second segment that is generally parallel with the second segment of the handle. Engagement by a user of either the first segment of the trigger or the second segment of the trigger causes the drive motor to rotate the shaft and blades.

An immersion mixer includes: a housing; a drive motor residing within the housing; a shaft attached to the motor and configured to rotate relative to the housing; blades attached to and rotatable with the shaft; a handle attached to the housing, the handle including a first segment and a second segment attached to the first segment and to the housing; and a trigger attached to the handle and operatively associated with the motor. The trigger includes a first segment that is generally parallel with the first segment of the handle and a second segment that is generally parallel with the second segment of the handle. Engagement by a user of either the first segment of the trigger or the second segment of the trigger causes the drive motor to rotate the shaft and blades.

A mixer machine assembly having a drive unit with an electric motor, a drive shaft assembly connected to the electric motor, and a propeller. The propeller has a hub, a plurality of blades, and a propeller shaft from the drive shaft assembly. The control unit is operatively connected to the electric motor, and is configured for monitoring and controlling the operation of the mixer machine. The control unit monitors a drive shaft torque about a drive shaft of the drive shaft assembly. The control unit determines an average torque range based on at least one torque range, wherein each torque range is the difference between the highest and the lowest torque value detected during a predetermined angle of rotation of the propeller during operation of the mixer machine assembly. The control unit compares the determined average torque range with a predetermined torque range limit value.

A submersible agitator device for circulating drinking water includes a submersible motor including a cylindrical housing, from one end of which there extends a shaft, a hyperboloid agitator mounted on the shaft, a frame with a plurality of supports extending along the housing and connected to the housing, wherein the supports have radially outwardly angled bend portions, which extend over a peripheral edge of the hyperboloid agitator body in order to support the frame on a base, and a flow-guiding element, which is annular in plan view and which is mounted on the bend portions of the supports.

An improved guard for a pump propeller is described herein. The guard includes a hub that in use surrounds a drive shaft of a drive motor unit that drives the propeller. The vanes define a propeller receiving area in which the propeller is received allowing the propeller to rotate relative to the vanes, while portions of the vanes radially surround the propeller. The guard is fixed in position about the propeller to protect the propeller from debris and to prevent human contact with the rotating propeller. The guard is designed to shed weeds and other debris, and prevent weeds and other debris from becoming entangled on the guard and with the propeller.

Digester (1) having an agitating device (10) and an agitating device (10) and a method for manufacturing an agitating device (10), the agitating device (10) comprising multiple agitator blades (21-29) which agitator blades (11-13) comprise a plurality of blade sections (21-29) angled relative to one another. The blade sections (21-29) of the agitator blade (11-13) are angled relative to one another such that the agitator blade gradient (11-13) decreases with the distance (30) from a central rotational axis (19) increasing to configure the agitator blade in a flow-optimized three-dimensional shape.

A method for operating an agitating device and a digester, wherein the digester is filled with a substrate and an agitating device is in the digester. These steps are performed: a) A target load curve is lodged in the control device; b) the control device prescribes a target rotation speed; c) the control device operates the agitating device at an actual speed corresponding to a target speed; d) the control device captures an actual agitating device torque measurement value at the actual speed of rotation; e) the control device derives from the actual measurement value an actual characteristic value of the agitating device applied torque; f) the control device compares the derived actual characteristic value against the target characteristic value of the substrate resulting from the target load curve at the prescribed target speed; and g) the control device controls the agitating device in dependence on the result of comparison.

Agitating device (10) for a digester (1) of a biogas plant (100) having a housing (11) and a driving device (12) for rotatably driving the agitator blades (13-15). The driving device (12) comprises a drive shaft (16) and an electric drive motor (20) wherein the drive motor (20) is accommodated sealed in the housing (11). The drive motor (20) comprises an outer, hollow stator (21) and a rotary rotor (22) which is centrally accommodated therein and is configured at least partially hollow. The rotor (22) is rotatably supported at the housing (11) and comprises a coupling device (23) for non-rotatable coupling with the drive shaft (16) to drive the at least one agitator blade (13-15) by means of the drive shaft (16).

A liquid polymer or chemical activation system, having a chamber; a top cover plate, a middle cover plate and a bottom cover plate; wherein such configuration creates a hollow space inside the chamber that is flanked by the top cover plate and the bottom cover plate; a hybrid pump blending reactor having a progressive cavity pump and one or more inlets for receiving first and second substances; an upper multistage mixing cup configured to receive the first and second substances from the hybrid pump blending reactor; at least one high shear mixer for mixing the first and second substances; at least one submersible actuator for actuating the high shear mixer; an intermediate blending section for receiving the mix of first and second substances from the upper multistage mixing cup; a lower multistage aging cup for further mixing of the first and second substances; and at least one outlet on the bottom cover plate for releasing the mix of first and second substances.