Principles and requirements for strainers selection
A strainers is a compact device that removes small solid particles from liquids, ensuring the proper operation of equipment. When fluid enters the filter cartridge equipped with a specified mesh strainers, impurities are retained while clean filtrate is discharged through the outlet. For cleaning maintenance, simply remove the detachable cartridge and reassemble the unit after processing.
1. Strainers inlet and outlet diameter:
In principle, the inlet and outlet diameters of the strainers should not be smaller than the inlet diameter of the matching pump, generally consistent with the inlet pipe diameter.
2. Nominal pressure selection:
Determine the pressure class of the strainers according to the maximum pressure that may occur in the filter pipeline.
3. Selection of hole number:
The selection of strainers hole number mainly considers the particle size of impurities to be intercepted and is determined according to the process requirements of the medium. The particle size that can be intercepted by various specifications of wire mesh can be found in the following table “strainers screen Specifications”.
4, strainers material:
The material of the strainers is generally selected to match that of the connected process pipeline. For different service conditions, strainers made of cast iron, carbon steel, low alloy steel or stainless steel can be considered.
5. Calculation of filter resistance loss
Water strainers, under the general calculation of rated flow rate, the pressure loss is 0.52～1.2kpa.
Filter applications
1. Stainless steel Strainers
Stainless steel strainers are extensively used in pipelines handling steam, air, water, oils, and various other media. They protect pipeline systems, equipment, pumps, valves, and related components from blockages and damage caused by rust, welding slag, and other impurities. These strainers demonstrate exceptional anti-fouling properties with easy maintenance, large flow channels, minimal pressure loss, simple structure, compact size, and lightweight design. The stainless steel strainers media ensures corrosion resistance and long service life.
2.Y-type Strainers
The Y-type strainers is an essential filtration device in pipeline systems for conveying media. Typically installed at the inlet of pressure-reducing valves, relief valves, constant-level valves, or other equipment, it removes impurities from media to protect valves and maintain normal operation. This advanced filter features a streamlined design with low resistance and easy sludge discharge.
3.Y-type tie rod extension Strainers
The Y-type rod-extension strainers combines a Y-strainers with an extendable joint through innovative design, featuring a simple structure and user-friendly operation. This solution effectively addresses installation challenges caused by varying flange lengths across different standard products. Primarily used in high-rise buildings, multi-story structures, and industrial water supply/drainage systems, these strainers are typically installed at the inlet of pressure-reducing valves, pressure-relief valves, constant-level valves, or other critical equipment. Their rod extension design allows easy removal of pipeline debris and facilitates maintenance operations, ensuring reliable valve functionality and equipment performance.
4. Basket Strainers
Basket strainers are compact devices that remove trace amounts of solid particles from liquids, protecting compressors, pumps, and instruments while enhancing product purity and purifying gases. These strainers are widely used in various industries, including petroleum, chemical processing, fiber production, pharmaceuticals, and food manufacturing. The system consists of a housing, drain cover, strainers cartridge, mesh screen, and bolts.
5. T-type Strainers
The T-type strainers is widely used in pipelines handling various media, including steam, air, water, and oil products. It protects equipment in pipeline systems such as pumps and valves from blockages and damage caused by rust, welding slag, and other debris. Wenzhou Tops valve co.,ltd produces T-type strainers featuring strong anti-fouling performance, easy drainage, large flow area, low pressure loss, simple structure, and compact size. The strainers screens are made of stainless steel, ensuring corrosion resistance and long service life. Available in both straight-through and baffle types, these strainers offer mesh densities ranging from 10 to 120 mesh and operate within temperatures of 0-450℃, allowing flexible selection based on user requirements.
