MGH- Suction Hydraulic

Overview

Technical Data

IPB & Drawing

Media

MEGA Suction Hydraulic Filters

Application:

The automatic self-cleaning suction hydraulic types, specially designed for very high flows – up to 14,000 m³/h (61,600 gpm) combine the advantages of high quality filtration from different water sources (sewage, reservoirs, rivers, lakes, etc.), with a self-cleaning feature, offering the customer a continuous water supply.

The filter is comprised of one or several filtering elements in one body, enabling the user to enjoy the advantages of a sophisticated automatic filter for high flows in a single body, saving footprint and the need for a battery of filters. The filter uses the water pressure for the self-cleaning process, eliminating the need for a power supply.

The filters are designed for use in a wide range of industrial, municipal and irrigation applications.

Standard Characteristics:

  • Inlet/outlet parallel, on an axis of 90° or 180°.
  • The filters are electrostatically coated with polyester or epoxy coating at a thickness of 150-200 µm and oven cured.
  • Filters are supplied with a stainless steel screen on PVC support, available in varying micron sizes as needed: 80-3000 µm. (for additional screen options, please contact YAMIT).
  • Maximum recommended working pressure: up to 10 bar (145 psi).
  • Minimum operating working pressure during flushing: 2 bar (29 psi).
  • Maximum water temperature: 65°C (149°F)
  • Clean screen pressure loss: <0.1 bar (1.45 psi).
  • Minimum flushing flow (3″ valve) : 50 m³/h (220 gpm)
  • Filters vessel diameter: 970-1400 mm (38″-56”).

A time basis backup (preset by the customer), guarantees that the flushing cycle will occur even if the head loss has not reached the preset value.

Filtration

Water enters the filter through the “inlet” and passes through the coarse screen, that functions as a “first stop” for rough particles.  Water then reaches the fine screen, which further purifies the flow by separating smaller particles from the water. As more water flows through, impurities build up on the fine screen. As impurities on the screen accumulate, a pressure imbalance is built up between the internal section of the fine screen and its external section.

Self-cleaning process – “Flushing“

When the difference in pressure (DP) reaches the preset value on the differential pressure indicator, the following events happen while the water continues to flow to the system units: the flushing valve opens, pressure is released fro the hydraulic piston, and water flows outside; pressure in the hydraulic motor chamber and the dirt collector is significantly lowered, and the dirt collector nozzles begin a suction process; the water flows through the hydraulic motor which rotates the dirt collector around its axis; the pressure released from the piston and the high pressure inside the filter cause linear movement of the dirt collector; the combination of the linear movement and rotation significantly clean the whole internal screen surface.

The flushing process takes 10 seconds. The flushing valve closes at the end of the cycle and the increased water pressure returns the hydraulic piston to its initial position. The filter is now ready for the next cycle while clean and filtered water flows through the “Outlet”. During the whole process water supply is uninterrupted. 

Each Mega filter contains 2 or more screens in one filter body.

The flushing process can be programmed (on request) to work either each screen separately or in pairs.

Filtration degree: 80-3000 µm

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