What type of gasket is generally used for valve bonnet gaskets?
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What type of gasket is generally used for valve bonnet gaskets? For the CL150 valve cover, which is oval in shape, what type of gasket is generally used?
What type of gasket is generally used for valve bonnet gaskets? For the CL150 valve cover, which is oval in shape, what type of gasket is generally used? 1. Regarding the valve cover gasket, the seal between the flange of the valve and the valve cover is, just like the seal between ordinary flanges, divided into non-metallic gaskets, semi-metallic gaskets, and metallic gaskets. It’s just that there is no standard for the dimensions of such gaskets; for specific details, one can refer to the standards for pipe flange gaskets. The valve cover is oval-shaped, and the gasket is also oval-shaped. The following information is provided for reference: Source: \"Guide to the Selection of Industrial Valves\"; Source: \"Valve Handbook: Selection\". 2. A few additional points: Usage limitations of elliptical valve covers; Source: API 600-2015
Some manufacturers say that it’s difficult to make gasketing for oval valve covers – is that true?
The API600 standard specifies the types of gaskets that can be used for valve covers; it does not stipulate that wrap gaskets cannot be used for valve cover flanges of CL150 rating. Clause 5.5.4 lists wrap gaskets as gaskets that may be used, and clause 5.5.5 further specifies that toothed gaskets and flexible graphite gaskets can also be used for CL150 valves.
It’s hard to do and it’s impossible to do are two different concepts. If it’s difficult to do, it means there are problems with the manufacturer’s technology; if it can’t be done at all, it means there are issues with the standards. Since the standards specify this, it means that most manufacturers are able to do it, and the quality can meet the requirements. In the valve specification sheet I issued earlier, wound gaskets were specified for the gaskets, and no manufacturer raised any objections stating that they couldn’t be produced.
@Valves Ming, what kind of gasket do you use for the valve gland gaskets of CL150 at your manufacturing plant?
This post was last edited by Valve Mingming on 2017-2-14 at 11:19. The fluorine-lined valves we produce use PTFE gaskets. Metal valves use metal with flexible graphite wound gaskets
It depends on what type of valve it is, as well as the operating temperature, pressure, and corrosiveness of the medium. There are many options available; the standards and specifications provide common choices that will work fine in most cases. However, for a specific valve, these may not be the best option. For example, in situations where the temperature is not high and the medium is not highly corrosive, using an O-ring is an excellent choice. For high-temperature and high-pressure operating conditions, a metal self-sealing structure is more suitable.