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Activated Carbon Filter Manufacturer: What is the recommended installation location for an activated carbon filter?
Release Date:
2022-04-06
What is the installation location for an activated carbon filter? In typical low-pressure systems with pressures below 140 kg/cm², only a suction filter is usually installed; however, backflow filters and air filters are also required. In standard medium- and high-pressure liquid systems with pressures above 140 kg/cm², backflow filters are generally used to control contaminant concentrations. Nevertheless, if there are special reliability requirements, high-pressure pipeline filters should be employed.
What is the installation location of the activated carbon filter?
In conventional low-pressure systems with pressures below 140 kg/cm², only suction filters are typically installed; however, backflow filters and air filters are also required. In standard medium- and high-pressure fluid systems operating at pressures of 140 kg/cm² or higher, backflow filters are generally used to control contaminant concentrations. Nevertheless, when particularly stringent reliability requirements apply, high-pressure pipeline filters should be employed.
Terminal filters shall be installed on electromagnetic proportional control valves and low-flow regulating valves to enhance system reliability. When servo valves are used in conjunction with activated carbon filters, it is essential to minimize the system’s contamination level; therefore, high-pressure and return-line filters must be employed. For systems with larger capacities, terminal filters must be installed on auxiliary lines to facilitate the installation of recirculation filters.
What are the precautions for using an activated carbon filter?
The typical installation locations for oil filters in hydraulic systems are as follows:
It shall be installed at the pump’s oil suction port. The pump’s suction line is typically equipped with a surface-type oil filter to protect the hydraulic pump by removing larger contaminant particles. In addition, the filter’s filtration capacity must be at least twice the pump’s flow rate, and its pressure drop must be less than 0.02 MPa.
Installed on the oil line at the pump outlet:
The purpose of installing an oil filter here is to remove contaminants that could enter components such as valves. The filtration accuracy must be 10–15 μm, the filter must be capable of withstanding both the operating pressure and the surge pressure in the oil circuit, and the pressure drop across the filter must be less than 0.35 MPa. A relief valve must also be installed to prevent blockage of the oil filter.
Installed on the system’s oil intake line: this installation provides indirect filtration. A backpressure valve is typically installed in conjunction with the filter; when the filter reaches a specified pressure, the backpressure valve opens.
Installed on the system’s branch oil line as a standalone filtration system: Large hydraulic systems can be equipped with a dedicated hydraulic pump and oil filter to form an independent filtration circuit.
In addition to the oil filters required for the entire hydraulic system, dedicated filters are often installed separately upstream of critical components such as servo valves and precision throttles to ensure their proper operation.
What are the selection criteria for activated carbon filters?
1. Import and export routes:
In principle, the inlet and outlet ports of the filter shall not be smaller than the inlet port of the associated pump; typically, their diameters are the same as those of the inlet piping.
2. Nominal pressure:
Determine the pressure rating of the filter based on the maximum pressure that may occur in the filter piping.
3. Hole count selection:
The primary consideration is the particle size of impurities that need to be intercepted based on the process requirements of the medium. The diameter sizes that can be intercepted by wire meshes of various specifications are listed in the “Filtering Specifications” table below.
4. Filter material:
The material of the filter is typically the same as that of the connected process piping; depending on the service conditions, filters may be made from cast iron, carbon steel, low-alloy steel, or stainless steel.
5. Filter Resistor Loss Calculation
For water filters, the pressure drop at the typical rated flow rate is 0.52 to 1.2 kPa.
Keywords:
Activated carbon filter
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