CONTROL VALVES

CRV Series is a straight body single seat control valve with cage guided balanced plug designed to withstand the most severe process conditions; the flow is mainly controlled by the special drilled cage, which acts as a continuous and full plug guide along the whole valve travel. The special plug design allows improving valve rangeability by reducing minimum controllable flow and plug erosion. The high pressure recovery factor value compared with conventional contoured plug control valves ensure higher flow rates on compressible fluid service and reduces cavitation risk and effects on liquid service.

All versions have quick change trim with internal spring to extend the quick change design up to maximum working temperature. Together with the standard high capacity trim, low noise trims and double cage trims are available respectively for critical service on compressible fluids (gas and vapor) and for high differential pressures or for cavitating service where higher pressure recovery factor values are required. Balanced Plug with Pilot execution allows to comply with IEC sealing class V up to 566°C for compressi ble fluids service. “Flow to close” configuration improves seat ring protection and increases seating force making this solution particularly reliable. For uncompressible fluids service, a special C-ring metallic seal is available to comply with IEC sealing class V without practical temperature limitations. Contoured unbalanced plugs are available on request up to DN 4” for dirty fluids service. Bonnet style, finned and partially extended is specially designed to comply with all working conditions. A special material configuration is available to comply with NACE MR0175 and MR0103 standards. CRV Series control valves are usually equipped with CVB diaphragm spring return pneumatic actuators SSDA and MSDA series (pneumatic cylinders PC series for DN 16” and over). Electrical or hydraulic actuators are available on request.