A classifying device comprising: a bin having an open top face; a flat screen extending along a plane and configured for extending over and fully covering the open top face of the bin, the screen having a netting configured to enable passage of material smaller than a desired size therethrough into the bin; and two flanges disposed at two respective opposite sides of a perimeter of the screen. The device is configured for being placed in a water stream with a water level just above the screen and the flanges disposed substantially along a direction of a water flow of the stream, such that the flanges decrease escape of the water through the sides at which the flanges are disposed, thereby increasing a speed of the water flow over the screen in the direction of the water flow of the stream.

Embodiments of the present disclosure provide for systems, apparatuses, and methods of securing screen assemblies. Embodiments include a system having a compression assembly with a compression pin and a pin assembly having a pin. The compression assembly may be attached to a first wall member of a vibratory screening machine and the pin assembly may be attached to a second wall member of the vibratory screening machine opposite the first wall member such that the compression assembly is configured to assert a force against a first side portion of a screen assembly and drive a second side portion of the screen assembly against the pin of the pin assembly. The pin assembly may include a pin that is internally or externally mounted and that is adjustable and/or replaceable.

A vibratory screening machine includes replaceable screen assemblies. Compression mechanisms are used to secure replaceable screen assemblies to the vibratory screening machine. Each compression mechanism applies a force to a replaceable screen assembly that includes both a horizontal component and a downward vertical component. Each replaceable screen assembly is typically substantially flat prior to installation on a vibratory screening machine. The force applied to a screen assembly by one or more compression mechanisms causes the screen assembly to be pushed into engagement with underlying concave support members such that the screen assembly itself assumes a concave shape with the center of the screen assembly being lower than the side edges. The vertical downward component of the force helps to secure the screen assembly to the screening machine.

A fat screening device includes a cylinder, and a sieve basket. The cylinder includes a feed inlet, an air outlet, a bottom water outlet, and an accommodating space. The accommodating space is in communication with the feed inlet, the air outlet, and the bottom water outlet. The feed inlet is configured to receive a mixture, the bottom water outlet is disposed at a bottom of the cylinder, the accommodating space is configured to accommodate water and fat resulting from stratification of the mixture, and the bottom water outlet is configured to discharge the water. The sieve basket covers the feed inlet and is arranged separately from the air outlet. The sieve basket is configured to screen the mixture to discharge the water and the fat into the accommodating space.

A vibratory screening machine includes replaceable screen assemblies. Compression mechanisms are used to secure replaceable screen assemblies to the vibratory screening machine. Each compression mechanism applies a force to a replaceable screen assembly that includes both a horizontal component and a downward vertical component. Each replaceable screen assembly is typically substantially flat prior to installation on a vibratory screening machine. The force applied to a screen assembly by one or more compression mechanisms causes the screen assembly to be pushed into engagement with underlying concave support members such that the screen assembly itself assumes a concave shape with the center of the screen assembly being lower than the side edges. The vertical downward component of the force helps to secure the screen assembly to the screening machine.

A vibrating sieve machine for applying vibrations on powder to be classified that is placed on a mesh member through a sieve frame including a plurality of separable sieve frames for sieving and classification, wherein the mesh member includes a circular annular mesh member frame having an outer peripheral surface and configured to be sandwiched by the separable sieve frames with the outer peripheral surface exposed outward in a radial direction of the separable sieve frames, a reinforcement mesh stretching across the mesh member frame, a sieve mesh configured to cover the reinforcement mesh, hanging down over an outer peripheral surface of the mesh member frame, and a fastening band configured to be attached to the outer peripheral surface of the mesh member frame so as to sandwich the sieve mesh between the fastening band and the outer peripheral surface of the mesh member frame.

A fastening arrangement in the form of a pin and sleeve combination is provided for fixing one or more screening media modules on top of screen support panel structure. The fastening arrangement includes a pin capable of being screwed into a sleeve, the pin being provided with engagement elements capable of connecting with complementary projections on a handling tool for facilitation of installing and dismantling the fastening arrangement. A method for fastening the screening media module on to the screen support panel structure, and a screening equipment housing the same for separating solid materials according to size is also provided.

A vibratory screening machine includes replaceable screen assemblies. Compression mechanisms are used to secure replaceable screen assemblies to the vibratory screening machine. Each compression mechanism applies a force to a replaceable screen assembly that includes both a horizontal component and a downward vertical component. Each replaceable screen assembly is typically substantially flat prior to installation on a vibratory screening machine. The force applied to a screen assembly by one or more compression mechanisms causes the screen assembly to be pushed into engagement with underlying concave support members such that the screen assembly itself assumes a concave shape with the center of the screen assembly being lower than the side edges. The vertical downward component of the force helps to secure the screen assembly to the screening machine.

Embodiments of the present disclosure provide for systems, apparatuses, and methods of securing screen assemblies. Embodiments include a system having a compression assembly with a compression pin and a pin assembly having a pin. The compression assembly may be attached to a first wall member of a vibratory screening machine and the pin assembly may be attached to a second wall member of the vibratory screening machine opposite the first wall member such that the compression assembly is configured to assert a force against a first side portion of a screen assembly and drive a second side portion of the screen assembly against the pin of the pin assembly. The pin assembly may include a pin that is internally or externally mounted and that is adjustable and/or replaceable.

Shaker assemblies for dewatering are disclosed. The shaker assemblies may include a clamping system for securing a vibratory screen of the shaker assembly.