This firm offers the Cartridge Valve (photo) with a mechanical-seal design for critical service applications. The patented valve utilizes aspects of ball valves, gate valves, and even triple-offset butterfly valves to protect the sealing surface during valve operation. A tapered hemispherical closure member rotates around a fixed core and wedges into a fixed seat to effect a mechanical seal. Cartridge Valves are designed in accordance with ANSI B16.34 and are also available with API 6D certification. They are available in sizes 2 – 10 in. and in ANSI Classes 150 to 900 and other sizes are currently in development. The valve is available in carbon steel, low-alloy steels, stainless steels, and other materials, such as duplex stainless steel, superduplex stainless steel, Inconel, Hastelloy and Monel. — Hemiwedge Valve Corp., Conroe, Tex.
Metal-Seated Valve Design for Critical Service Applications
| By Chemical Engineering