Dycon valves are manufactured with ASTM pressure containment materials, tested in accordance with ASME section VIII of the specification and fully functionally tested before dispatch. The unique pressure balance of the valve allows the regulator to be both internally and externally sensed – providing for various different types of control modes, some of which include pilot valves, loading regulators and P.I.P. Flowing velocities are not restricted due to the unique design principles employed within the valve, some of which include heavy guiding of the main piston and bushing of the spindle. cunico manufactures high quality Regular Control Valves of Series 5000.