In order to choose the right valve, it’s a question of identifying the type of application that’s needed. For example, needle valves are typically specified for regulating and control applications. Ball valves are used for open / close applications.
Needle Valve - Gate Valve - Ball Valve - Butterfly Valve
Plug Valve - Disc Valve - Diaphragm Valve
Choosing the right valve requires determining the CV value, max flow, fluid pressure, temperature, media, corrosion resistance and line size. Other factors such as valve availability and cost are just as important. Once you have found your valve from catalogs or other resources, you need to check if it’s available at your budgeted time and cost. Below are the 4 steps to finding the perfect valve.
SG = Specific gravity of gas
p1 = Gas Inlet Pressure
p2 = Gas Outlet Pressure
T = Absolute Temperature
Q = Gas Flow Rate in SCFH
Q = Flow rate in GPM (US gallons)
G = Specific gravity of liquid
Dp = Pressure drop = inlet - outlet pressure(psi)
For the SS-18RM8 valve, the CV in the catalog text table is given as CV = 1.8.
This is the max CV on an open valve. If you want to find out your CV related to the number of turns open, you have to use the graph. the CV is approx. = 0.75 when the valve is open at 2 turns.
Established in 1986, Hanbay is a manufacturer of miniature electric valve actuators that can be customized for any application, in any industry.
Hanbay’s electric valve actuators provide precise positioning, with the highest torque, resulting in accurate flow control. Our expertise is in manufacturing compact actuators capable of micro-positioning on miniature valves.