DBBV: double block & bleed safety service valves are unveiled to deliver a second level of isolation often mandated by refineries and production facilities.
They comprise a secondary ball/sealing surface to retain pressure in the event that the first ball or sealing surface is damaged. With 4130 alloy steel service body, 17-4 stainless steel balls, Fluoroloy stem and seals, plus Viton O-ring — DBBV operates at up to 3,600 psi and 450°F./232°C. with seal options.
Additional safety double block & bleed valves information is free for the asking.
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