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v coeficient (C vr) for viscous applications. the flow and viscosity conditions, a fluid Reynolds number can be found by using the nomograph in Figure 2. The graph of Reynolds number vs. viscosity correction factor (Fv) is used to determine the correction factor needed.
SECTION 1 FLOW COEFFICIENTS (ASME/ISA/IEC) Valve Style Page ... Table 1. Typical Values of Valve Style Modifier Fd (Full Size Trim) VALVE TYPE FLOW DIRECTION ... Globe, 60 equal diameter hole drilled cage Either(1) 0.40 0.29 0.20 0.17 0.14 0.13 Globe, 120 equal diameter hole
Use capacity tables or flow charts for determining a direct-operated regulator’s capacity. When sizing direct-operated regulators, use interpolation for application pressures differing from the values in the capacity tables. For best results, use data from within the same spring range.
new benchmarks with the flow regulator series 110 and 310: further refined control technology combined with double sealing of the valve disk offers not only precise setting of the flow rate, but also lengthens the service life of the O-rings in the control valve.
IMPORTANT: The V46 Series 2-Way Pressure-Actuated Water-Regulating Valves are intended to control water flow under normal equipment operating conditions.
Valtek uses a systematic method for selecting body types, sizes, materials, pressure ratings and trim sizes based on flow characteristics. Valtek control valve flow capacity (C v) is based upon the industry standard, ANSI/ISA S75.01.
This tutorial briefly describes how to use flow coefficients to size valves for water systems, the difference between using two-port and three-port valves and the effect of these valves on pressure drop, flow and water system characteristics.
