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.
Available in a range of sizes from 100 l/s to 790 l/s. TROX Series Fan VAV boxes are suitable for electronic control. Volume flow tolerance is dependent on the type of control system but is typically Â±5% to Â±10% of set volume.