Popular guidelines

What is the CV calculation of a control valve?

What is the CV calculation of a control valve?

Cv by definition is the number of gallons per minute (GPM) a valve will flow with a 1 psi pressure drop across the valve. For example a valve with a Cv of 10 will flow 10 GPM with a 1 psi pressure drop. The formula used to select the valve Cv with the specified differential pressure is: Cv=GPM/((SQ RT(P)).

What are the characteristics of control valve?

All control valves have an inherent flow characteristic that defines the relationship between ‘valve opening’ and flowrate under constant pressure conditions….The three main types available are usually designated:Fast opening.Linear.Equal percentage.

What is Stellite 6?

Stellite® cobalt base alloys consist of complex carbides in an alloy matrix. They are resistant to wear, galling and corrosion and retain these properties at high temperatures. Stellite® 6 is the most widely used of the wear resistant cobalt based alloys and exhibits good all-round perfor- mance.

What is Valve Stellite?

A material used in valve trim known for its hardness, wear and corrosion resistance. Stellite is available as a casting, barstock material and may be applied to a softer material such as 316 stainless steel by means of spray coating or welding.

What is Stellite material?

Stellite is a range of cobalt-chromium alloys designed for wear resistance. The alloys may also contain tungsten or molybdenum and a small but important amount of carbon.

What is the composition of Stellite?

Stellite® 6, the nominal chemical composition of which is 27–32% Cr, 4–6% W, 0.9–1.4% C, with additions of Ni, Fe, Si, Mn and Mo and Co as balance, is a two-phase alloy, with a chromium carbide minor phase, which has been shown to have outstanding resistance to both erosion and corrosion.