hva gate valve maintenance and adjustment procedures
May 15, 2001 . B. Procedure: Always wear Rubber Gloves when handling the Gate Valve. 1. Vent station and pump corresponding to Gate Valve to atmosphere;. 2. Actuate valve to Gate Open position;. 3. For safety, remove air to actuator;. 4. Remove bolts that hold Bonnet Actuator Assembly to body; or for Quick Clamp.
Introduction to Valves Only the Basics Valves are mechanical .
In all cases, the attachment of the bonnet to the body is considered a pressure boundary. This means that the weld joint or bolts that connect the bonnet to the body are pressure retaining parts. Valve bonnets, although a necessity for most valves, represent a cause for concern. Bonnets can complicate the manufacture of.Get Price