The Flowserve Mark Two control valve, available in many different configurations, is an extremely versatile automatic control valve. Fabricated from bar stock, it can be machined without foundry delays, even in high pressure classes or special alloys. This valve is generally available in sizes from 1/2 to 2-inch, but special configurations can be built to 6-inch.

The preferred body design is with socket-weld ends, but grayloc, butt-weld, flanged, and screwed ends are also available in ratings from 150 to 2500 psi / 10.3 to 172.4 bar, with special applications to 15,000 psi / 1034 bar. Offset globe construction is generally less expensive than in-line construction.

Most common maintenance problems with comparable globe valves are associated with cage guiding where close metal-to-metal contact between the cage and plug often results in galling and binding. Conversely, the Mark Two is double-stem guided, completely avoiding contact between the plug and seat retainer. Top entry trim with a clamped-in seat also permits easy, quick maintenance.


  • Same rugged design as the Mark One series
  • Utilizes a forged or bar stock body
  • Available in a wide range of materials
  • Many interchangable parts with the Mark One Series