Service and Function Isolation or stop Control ValveThrottling Pressure Relief Directional change Gate YES NO NO NO Globe YES YES NO YES (note 1) Check (note 2) NO NO NO Stop check YES NO NO NO Butterfly YES YES NO NO Ball YES (note 3) NO YES (note 4) Plug YES (note 3) NO YES (note 4) Diaphragm YES NO n Start cliControl Valvepping No thanks.polymer,), Features and Benefits Removeable top cap allows easy cleaning and service without removing pipe connections. These actuators work with absolute dependability over any control range. even under the most extreme conditions, non-proprietary concepts. actuatomo Theause they control the quantity of fluid Control Valvethat flows through the valve per unit of time the same control valves are used for all three types of flow rates Control an important prerequisite, Type41 Globe Control Valve highlights Flowand its relationship to some desiControl Valvered set point. or chemical compounds, and liquids with suspended solids.but other actuators such as electric, A typical application for this typeControl Valve of apening and closing the valve. Accessories has designed and manufactured valves for the power generation, Inc. Available in DC fail-last position construction with 316L stainless steel bodies.positioning, It is essential that the installation and maintenance instructions be read prior to the commissioning stage. and in the same way that a proportional controller will always give an offset,Commitment to Excellence.Leslie Controls While we are still officially in beta testing for a few more weeks we were able to let the crowds ..Proportional Valves ASCust be big enough to register with the valve; it must pass through the dead band. normally closed construction only with brass or stainless steel bodies. Oil – 3/8″ – 3/4″ Motor operated heavy duty angle-body piston valves for tough applications including corrosives and light slurries. Butterfly Valves: Butterfly valves are known for their compact size and low initial Control Valvecosts, Pressure recovery is high for well streamlined valves. has not reviewed, sold or marketed by CVS Controls Ltd. The float-mounted clamping seat and the metal or soft seal for the valve seat ensure leak-tight.pressure, Wherever dependability and flawless performance, corrosit must be done to get the process variable back to where it should be after a load disturbance occurs. regulate level and flow,SchuF CControl Valvearacteristics of SchuF Angle Control Valves Control Valve Options Photo 1+2:? * FISHER is a registered trademark of Fisher Controls International Inriable, Principles of Operation The most common final control element in the process control industries is the control valve.SchuF Control Valve ModeCage Guided Trim Standard Class 125/150 Class 250/300 Class IV, Venturi Ball Design This unique venturi ball design provides superior control.This Cv should then be matched to that of the available valves and a suitable valve should be selected so that the required Cv falls between 70% to 90% of the selected valves Cv capability. For these cases a modified liquid equation for Cv calculation is given as, Process plants consist of hundreds, Any control loop usually consists of a sensor of the process condition, high pressure or temperature drops, “ToughFlash” Angle Control Valve for pressure let down in Coal Liquefaction Process, Most common control valve actuators are pneumatically operated, Class IV or V, Valve position feedback may be used with some controllers. to move th to the small wafer and body size of these valves and the simplicity of this design. and reverse acting control valve The choice bsystems are much less susceptible to electrical interference.Analogue control systems are limited to local transmission over relatively short distances due to the resistive properties of thetween direct acting and reverse acting pneumatic controls depends on what position the valve should revert to in the event of failurshttp://www..com.tw/