Metallic corrosion involves the loss of metal at a spot on an exposed surface. Intergranular corrosion occurs at grain boundaries. Intergranular corrosion is also called intercrystalline corrosion.
Sometimes it is necessary to cool the seal faces in a centrifugal pump with a single mechanical shaft seal or remove deposits in the seal chamber. Fitting a circulation pipe can solve this problem.
A jockey pump is a small pump connected to a fire sprinkler system in order to maintain a certain pressure in the sprinkler system, and sized to ensure that if a fire-sprinkler is activated, there will be a system pressure drop.
The Kv value expresses the amount of flow in a regulating valve at a given valve position with a pressure loss of 1 bar. The special situation with a fully open valve determines the kvs value.
The Kvs value expresses the amount of flow in a regulating valve at a fully-open valve position and a pressure differential of 1 bar. The Kvs value is a special case of the Kv value, which indicates the flow at a given valve position and a pressure differential of 1 bar.