Mother's Day is a celebration honoring mothers and celebrating motherhood, maternal bonds and the influence of mothers in society. It is celebrated on various days in many parts of the world, yet most commonly in March, April, or May.
Coils, rings, and corrugated ribbon are the common forms of packing used in valves. The form of packing to be used in repacking a particular valve will depend on the valve size, application, and type. Packing materials will be discussed in more detail later in this chapter.
GEMÃ¼ metal diaphragm valves are available in a weir-type version and in a full bore version and, because they are insensitive to particulate media, they are suitable for numerous industrial processes. Coatings and plastic linings are optionally available.