Y-strainer valves are attachments for mechanically removing impurities from fluids, through the means of a perforated or wire mesh straining element. They are attached to a pipeline for the use of protecting pumps, meters and control valves.
Y-strainers are very costly, yet effective strainer solutions to many problems that of which many applications. When the stockpile of debris is that needs to be cleansed is not high, which results in long intervals in between, the strainer screens are all manually cleaned by shutting down the lines and removing the strainer cap. For applications with heavier dirt loading, Y-strainers can easily by fitted with a blow-off connection that allows the screen to be cleaned without the need to remove it from the strainer.
Y-strainers can be used in a wide range of fluid straining applications to prevent a downstream process system parts in many industries, and also includes: marine, power generation, petroleum and chemical processing. Water handling applications, where Y-strainers are used to prevent equipment from being clogged or damaged by unwanted gravel and sand, which can be very common. By the way, most of these parts are made by China Y-strainer manufacturer.
Carbon steel Y-strainers are most commonly found in the oil and petrochemical industry. They have great resistance to either mechanical or thermal energy and these are important decisions to make when choosing the right valve, especially when in the scenario of a fire outbreak. Most oil refineries will usually disallow iron piping parts for this reason. Carbon steel Y-strainers are also commonly used because of higher pressure applications, for their great strength. Stainless steel Y-strainers are used when corrosion is popular in a factory. They are most common in the food, chemical and pharmaceutical industries, where rust and other forms of corrosion are spontaneous.
It cannot be exaggerated that Y-strainers for critical applications must be designed with extremely high quality. This means sufficiently heavy wall thickness and blow-off connections. For example, inside of inappropriately trapped steam lines, condensed fluid can build up, and become a slug of water moving at high speeds down the line. Even a slight change in direction created by a Y-strainer can cause a significant shockwave, which can destroy the valve. Manufacturers who thin down walls to save weight and cost are going to get seriously backfired.
A Y-strainer, if applied with blow-off connections, can be a self-cleaning strainer. Valves can be installed on the connection found on the Y-strainer’s cap. The screen can therefore be cleaned by simply opening and then shutting off the valve without stopping the flow or dissembling the strainer. When the valve is open, the material inside the screen is drained out.
Something else to take note of is to check inside Y-strainers is the corner where the screen or straining elements seals to the body. The seat should then be carefully machined so no particle can go through it. The same thing also applies to any un-machined seats. An inappropriately will allow osmosis of the fluid, which may bring impurities and debris.
Y-strainers can be found with a wide variety of end connections including threaded, flanged and welded. Flanges are usually designed to ANSI specifications.
Special flanges such as ring joints are obtainable as well. Y-Strainers can be constructed to US Navy flange dimensions, which differ from commercial standards. For extremely high-pressure applications, Y-strainers with socket or butt weld end connections are often specified.