Do seat ring welding rods need to be pre-heated? I've been told that they do not.

If I have understood this correctly, in reverse acting gate valves, you pull the plug up to close the valve. Gate down = open valve.

Some good source of Relief Valves Problems/Design.I have one recommendation for Relief Systems Handbook from Cyril F. Parry.

TP-12D is a Worcester technical paper. All Worcester distributors are supposed to have at least a copy of all the Worcester Technical papers on CD.

"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.