What is the technical specification for a control valve?
Control Valve Technical Specification 9 4.2.3 Seat Leakage Seat leakage classification shall be in accordance with FCI 70-2 or MSS-SP- 61. The leakage class shall be determined by the service application. Soft- seated valves shall not be applied in services with design temperature conditions over 230°C (450°F) or in flashing liquid services.
Why does the stem of a control valve stay closed?
Instead of the stem smoothly lifting immediately as pressure exceeds the bench-set value, this valve will remain fully closed until enough extra pressure has accumulated in the actuator to generate a force large enough to overcome spring tension plus valve friction.
What is the minimum flow condition on a control valve?
The minimum flow condition generally subjects the control valve to the highest differential pressure condition. The minimum flow conditions are generally the governing case for the required trim performance.
How is the flashing of a control valve predicted?
An important parameter predicting flashing in a control valve is the valve’s pressure recovery factor, based on a comparison of the valve’s total pressure drop from inlet to outlet versus the pressure drop from inlet to the point of minimum pressure within the valve. = Pressure recovery factor (unitless)
What kind of temperature control valve do I Need?
This thermostatic cooling control valve has everything you need for reliable temperature control. The Sterlco® 56-T Series Temperature Actuated Water Regulating Valve evenly regulates cooling water and other fluids in the most rugged applications.
Why do you need a sterlco temperature control valve?
Control and protection are critical to the success of your operation. Sterlco ® self-modulating temperature control valves are temperature actuated, self-powered, fully balanced, and applicable to heating or cooling processes using water, oil, steam or other fluids.
Where can I find specifications for control valves?
Find Control Valves on GlobalSpec by specifications. Control valves or proportional valves are power-operated devices used to modify fluid flow or pressure rate in a process system. Products & Services All News & Analysis Products & Services
How does a temperature control valve ( TC ) work?
The hot fluid passes through the shell of the exchanger while the cold fluid passes through the tube. The hot process fluid transfers heat energy to the cold process fluid thereby increasing its temperature. However the elevated temperature of the cold fluid is controlled by the controller TC.
