Habonim USA is a manufacturer of industrial valves and actuators. Available products include a double block & bleed valve featuring two main isolation valves, and one bleed valve in a single construction, with a size range from 1/2" to 4" and operational temperature range of  -104°F to 480°F. These valves may be operated via manual control, actuated or coupled actuated control.

Asco Valves is a designer and manufacturer of valves and valves systems. Product offerings do not include double block and bleed valves, however several varieties of normally open vent valves used in double block and bleed valve systems are available in pipe sizes ranging from 3/8" to 3".