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Filter valve refers to the valve with the function of filter medium, usually with filter screen, filter element or with magnetic rod (mainly filter metal)

Trekre Strainer Valves Series

Y-Type Pipeline Strainers

A Y-type strainer is a pipeline component that intercepts solid particles through a removable screen installed inside a Y-shaped pressure body. It is commonly positioned upstream of equipment that may be affected by construction debris, scale or other particles in the process stream.

The Y-type strainers in this category include flanged cast-iron, cast-steel and stainless-steel product configurations. The pressure class, screen material, flange connection and fluid compatibility must match the selected model.

How a Y-Strainer Works

Fluid passes through the strainer body and screen while particles larger than the effective screen openings are collected. As debris accumulates, pressure loss across the screen can increase. Cleaning normally requires isolating and depressurizing the equipment before opening the cover or removing the screen in accordance with the manufacturer’s maintenance procedure.

A conventional Y-type strainer is not an automatic self-backwashing filtration system. Motorized cleaning shafts, differential-pressure controllers and automatic suction-cleaning assemblies should not be described as standard components of these Y-strainer products.

Screen and Body Selection

Item Selection consideration
Body material Fluid compatibility, pressure-temperature rating and piping specification
Screen opening Particle size to retain and acceptable pressure loss
Screen material Mechanical strength, corrosion resistance and cleaning method
Connection standard Mating flange dimensions, facing and fasteners
Screen access Required clearance and safe isolation for maintenance
Flow direction Correct orientation and accumulation of debris

Installation and Maintenance

Install the strainer in the flow direction and orientation permitted by the actual product. Provide sufficient clearance to remove the screen. Steam, liquid and gas installations may have different recommended screen-pocket orientations. A pressure gauge or differential-pressure measurement arrangement can help indicate increasing resistance caused by debris accumulation.

During initial commissioning, screen inspection may be needed more frequently because new piping can release construction debris. Before opening a cover or drain, isolate, depressurize, drain and cool the strainer as required by the medium and site procedure.

Strainers are commonly considered alongside regulating valves, water control valves and other equipment requiring upstream particle protection.

Frequently Asked Questions

What screen opening should I specify for my Y-strainer? Select the opening according to the particle size that must be retained and the acceptable pressure loss. A finer opening can increase resistance and cleaning frequency. Also confirm screen material, fluid compatibility and the selected model’s requirements.

How will I know when the strainer needs cleaning? Increasing pressure loss can indicate debris accumulation. A suitable pressure or differential-pressure measurement arrangement can help monitor resistance, and screen inspection may be needed more frequently during commissioning. Follow the selected strainer’s maintenance instructions rather than assuming automatic cleaning.

How much space should I leave to remove the strainer screen? Confirm the screen-removal clearance for the selected product and leave suitable access for maintenance. Installation must also follow the permitted flow direction and screen-pocket orientation. Before opening the cover, isolate, depressurize, drain and cool the equipment as required by the medium and site procedure.