By assembling an A-T Controls WB Series well site block & bleed valve assembly, the need for isolation on well head pressure relief feed, filter skid pressure relief and dryer skid relief feed lines is eliminated. By eliminating the need for additional maintenance and component removal, operators also reduce down-time and the possibilities of leakage and gasket replacement. The WB series system is comprised of a ½ to 2 inch block valve and a ¼ inch bleed valve. Construction is 316 stainless steel with a carbon-graphite RTFE seat. The ends are seal-welded, and the stem is blowout proof. The assembly is NACE compliant MR0175, and the design is rated API=607, 5th edition firesafe.