"How to fit a Wedge" in a Gate Valve.I understand it requires Feeler gauges to determine how much metal to remove, but I need details.

I need to determine the appropriate thickness for an FA16 flange for mounting an electric actuator capable of 740 ft-lbs of torque.

I'm trying to find information on a gate valve I've used in the past. What I remember of the valve is that it had either a coarser thread.

The body must be forged, but not casting because of the weight of metal and potential defect in casting process.

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.