What mesh size is suitable for the filter before the steam pressure relief valve? ?

Recommended: Water 40-60, Oil 60-100, Gas 120-300 mesh; the specific value depends on the size of the particles inside

You have it reversed; it should be 60-100 for gas, and 120-300 for oil

This post was last edited by Watt Energy Saving on 2019-11-6 at 14:50. The Y-type filter designed for steam is intended to effectively filter out impurities in steam systems online, protect steam equipment, reduce maintenance costs and downtime, and extend the lifespan of the equipment and control valves. I. For the filter placed before the pressure reducing valve, the following points should be considered: A 40-mesh stainless steel filter, namely the GL200 steam filter, should be installed in front of direct-acting steam pressure reducing valves (including those with diaphragm heads, bellows, or spring-diaphragm designs) to prevent the valve core and seat from getting clogged. A 40-60 mesh stainless steel filter, the GL200 steam filter, should be installed before the pilot piston-type steam pressure reducer; this serves to protect the piston’s movement and prevent damage to the sealing components. A 100 mesh stainless steel filter, the GL200 steam filter, should be installed before the pilot diaphragm-type steam pressure reducer, as it helps to protect the control valve and prevent accumulation on the diaphragm at the bottom. II. While the mesh size of the steam filter is indeed important, attention must also be paid to its selection and installation. 1. But first, a filter with a stainless steel filter mesh should be chosen, as it is resistant to erosion ； 2. For Y-type filters, it is necessary to choose steam filters with a large effective filtering area (an area 3 times greater than the cross-sectional area of the pipeline). 3. If a drain device is installed at the bottom of filters designed for use with steam, these filters should be installed vertically; if no such drain device is available on the filter’s valve cover, they must be installed horizontally to prevent water hammer effects during startup and shutdown. 4. The filter should be cleaned regularly; otherwise, the welding slag in the pipes will repeatedly damage the filter mesh, causing it to break ； 5. For filters larger than DN200, Y-type filters are not recommended; basket filters can be used instead.

Use a piece of cloth to compare – gas can escape, but how much oil can pass through? Gaseous substances are more precise, while the filtration accuracy for oils needs to be specified in greater detail. .

The higher the mesh count, the greater the precision; here is an attachment for you

https://bbs.hcbbs.com/thread-2847636-1-1.html. Attachments can’t be sent, so I can only provide you with the link

The poster said that the pipes carry steam, and the debris inside them is mainly welding slag, rust, and similar things. If the mesh size is too large, it is prone to clogging ； If the mesh size is too small, it’s easy to let trash through. 80 mesh is relative to the midpoint.

For the steam pipeline, purge it first to blow away the larger particles of slag