Please advise on the model description for instruments and valves
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I saw in some instrumentation reference books that the commonly used ball valves for instruments are of the Q11SA-25P type. What does the “SA” in this designation mean? Some people say it’s fiberglass, right?
The Q11SA features a simple structure, easy operation, low fluid resistance, reliable sealing performance, and a long service life. It is suitable for various types of connections and is widely used in the automatic control systems of devices in industries such as petroleum, chemicals, power generation, metallurgy, and machinery. Performance specifications: □ Nominal pressure: PN2.5 PN4.0 PN6.3 PN16 PN25MPa □ Nominal diameter: DN10-DN20 □ Applicable media: various non-corrosive and corrosive media such as oil, water, and gas □ Operating temperature: -40℃-450℃ □ Manufacturing materials: 20#, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 316L, etc. □ Pipe materials: steel pipes ф12-ф34, copper pipes ф6, ф8, ф10. 25 denotes 2.5MPa, while P indicates stainless steel