WV/T

PROTEGO® WV/T change-over valves are mainly used together with other valves or devices (e.g., PROTEGO® flame arresters Flame Arresters A flame arrester, deflagration arrester, or flame trap is a device or form of construction that will allow free passage of a gas or gaseous mixture but will interrupt or prevent the passage of flame. ) on cryogenic storage tanks and on tanks in process plants in the chemical, petrochemical, and pharmaceutical industries. They increase the operational safety of the equipment Equipment Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion. to be protected, as each valve or device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. can be checked, maintained, or repaired without interrupting plant operation.

The change-over valve Change-over valve A change-over valve is a valve in which the direction of flow can be changed by operating a handwheel. allows the operator to block one valve or device at a time by operating the hand wheel (8). In normal operation, the valve disc (2) is in middle position and the gas/liquid flows through both connection elbows. By turning the hand wheel as far as it will go, one of the connecting elbows (3 or 4) is closed while the other one remains open. The actual position of the valve disc is indicated by the position indicator (5) on the valve spindle. Depending on the requirements, the position of the change-over valve in normal operation can be in the middle or end position: Middle position, for example, is if a high capacity of relief is required through emergency relief valves Emergency venting valves Pressure relief valves for emergency venting. controlled in parallel. End position, for example, is with flame arresters that are connected in parallel and can be used or cleaned alternately.

PROTEGO® WV/T change-over valves are characterized by their simple design, easy handling, the option of quick replacement of components that affect the function, and by their excellent availability and operational reliability. The lapped metallic sealing surfaces ensure a high degree of tightness even in low temperature ranges. These valves are not flame-proof and do not fall within the scope of the European Explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. Protection Directive 94/9/EC, even if installed in explosive atmospheres. Based on a hazard analysis with regard to material selection and function, the valves have no potential ignition sources. This enables unrestricted use in potentially explosive areas.