Alco Valves is a designer and manufacturer of double block and bleed valves and piping interface products. Double block and bleed valve products are offered in flanged, and screwed connection varieties in standard and slim line models. trunnion mounted ball valve models are also available.

Flowserve is a manufacturer and service provider of flow control products. Double block and bleed valve products are build to ASME and ISO 9001:2000 standards and feature minimized leak paths, metal seated valves, double piston seats and extended vent fittings.

Franklin Valve LP is a manufacturer of non-lubricated double block and bleed valves. Double block and bleed valve products feature nickle plated plugs, low torque operation with options including pressure relief systems, extensions, locking devices and actuator activation systems.

ChemValve is a manufacturer of fully lined double block and bleed valves. Products feature up and downstream seats as well as a 1" ANSI class 150 pound rated bottom flange.

Cameron is a manufacturer of high-integrity, positive Shut-Off Double Block & Bleed Valves which serve the pipline, liquid bulk terminals, aviation fueling, refining, oil/gas production and custody transfer for the petroleum and oil and gas industries. Double block and bleed valve products feature two independently mounted seating slips on tapered plugs which mechanically retract from the seating surface prior to rotating.