Material of Construction
Chokes can be specified in any machinable material. Standard materials are 304 and 316 stainless, brass, and carbon steel. Fox can, and does, build them in many other materials, including titanium, monel, zirconium, Alloy 20, bronze, and others.

End Connections
Two of our most standard installation geometries are shown at right:

• Flange-insert style (for 1" - 6" lines)
• Tube-insert style (for tube sizes below 1")

However, any other end connection of installation geometry can be specified, including any type of flanges; NPT, BSP, or metric threads; butt-weld or socket-weld ends; VCR or sanitary connections.

Pressure/Temperature Rating
Fox chokes are machined from bar and can be designed for service at 8000 psig or higher. Because they have no moving parts, they are ideal for use with cold or hot gasses between -400° F and +1500° F.

Calibration
Fox Sonic chokes are delivered with a standard, theoretical calibration of ±2%. However, our chokes can be provided with fully NIST-traceable calibrations accurate to ±1/4%. Add an additional 4 weeks.

Sonic Chokes - ADS.