Clarify "Vaccum sealing arrangement in valves". It means the valve shall seal when pipe pressure becomes lower than valve external pressure (usually athmospheric pressure).

To jerry-rig a 3-way valve to do 2-way operation? it seems to me that one would just need to disconnect the bypass leg and cap the open pipe connections.

Are rollers and scrapers used in large diameter (>12")resilient seat gate valves that are mounted horizontally?

Specifying valves for a oil centre.For lethal gas, the ASME standard simply mentions that the valve should have enhanced stem seals.

Using of trim 5 on gate vales in steam service. Is there a temperature you would recommend moving from other trims to trim 5. Is there a better trim than trim 5?

Comments or examples on practical upper limit for application of epoxid coated knife-gate valves for liquid fluids?

For buried application , is it OK to use Rising stem gate valve ??Can we install rising stem gate valve with actuator , is it standard to connect the actuator with rising stem gate valve or actuator i

Apart from problems with real variable stiffness from one valve to another we have a major issue with the double seated expanding gate valves.