6400/6600 Series
ASME NB Certified: Steam & Air
Sizes 1" x 2" to 4" x 6". Effective orifice areas from 0.11 to 6.38 square inches. Pressures from 15 psig to 1500 psig. Temperature range from -20 °F to +1000 °F. Steel body and open bonnet and stainless steel trim.

Double blow down ring design to meet the reseating standards of Section I of the ASME Code. Temperature equalizing disc for maximum seat tightness. Available with exposed spring (6400) or closed bonnet (6600). Full nozzle design for ease of maintenance.

Applications: Steam boilers (Type 6400) and organic fluid vaporizers or hot water boilers (Type 6600).