Double ball valves are isolating valves designed to fully open or close the service fluid flow. They are not designed to be used for throttling or regulating purposes. The scope of application of the ball valves depends directly on their materials and on the properties and temperature of the service fluid.
Ball valve design meets the requirements of EN 1983, or API 608 and API Spec 6D. The ball valve is with double floating balls in series to ensure tightness. The stem design ensures that the stem can not be ejected from the valve body by pressure of the fluid (anti-blow-out stem), internal components are connected to provide conductivity and resistance to formation of electrostatic discharges (anti-static design).
Dimensions of flanges for actuator installation are in accordance with ISO 5211.
The method of operation is indicated by the third digit of the type designation, which is „0“ for lever and „3“ for actuator (e.g. KM 913X.X-DBL).
According to EN 12 266–1 as a standard, or API 598 or API Spec 6D – zero leakage. If required by the Customer, additional tests may be performed as well.
The ball valves may be installed into the piping in any arbitrary position. They require no special adjustments or maintenance. They are operable at the full pressure drop which equals to PN.