What is the difference between one-piece and two-piece ball valves?

A two-piece valve has a bolted body joint, so the center section can be opened to replace seats and seals without removing the whole valve from the pipe. One-piece valves usually have to be cut out for repair.

What pressure and temperature can it handle?

It is rated to 285 psi and from -40F to 450F. The Teflon seat is the limiting part at the top of that range, so check the pressure rating at your actual temperature.

Does the full port matter?

Yes. A full-port 6" valve has a bore close to the pipe inside diameter, so it adds little restriction and can be used for pigging or high-flow lines where a reduced-port valve would not work.

What is the ball and seat made of?

The ball is 316 stainless steel and the seat and stem packing are Teflon (TFM-1600), with Viton O-rings. That combination suits water, HVAC and many mild chemicals but not strong acids or abrasives.

What flange standard does it use?

It has 150# flanged ends, the common ANSI Class 150 pattern. Match it to your mating flange size and bolt pattern before ordering.

Is it repairable in place?

Yes. The two-piece bolted body allows the seats and seals to be reached for service while the valve stays in the line, which is the main reason to choose it over a one-piece design.