Double block and bleed ball valve： Specification： 2" ~ 24"(DN50~DN400) ANSI Ratings 150# ~ 2500# (PN16~PN420) 3 Pieces Body Construction RF RTJ BW Connections Main Body Material : ASTM A105, A182 304, A182 316, A182 304L, A182 316L,A182 F6A,A182,F51,A182 F53,F22 Alloy Main Ball Material: ASTM A105, A182 304, A182 316, A182 304L, A182 316L,A182 F6A,A182,F51,A182 F53,F22 Alloy Main Seats Material: PTFE/ RTFE(≤120℃) , NYLON (≤80℃), PEEK/PPL (≤250℃) Product Details Double Block and Bleed Ball Valves are aimed to get a double barrier on the piping, and bleed the fluid trapped between the two balls from a dedicated drain line.Valve design can be either trunnion or floating type, anti blow-out stem, valve seats can be soft or hard-faced. Feature: Process Isolation Drain Line Isolation Double Block & Bleed Blow Out Proof Stem Design ISO 5211 Mounting Pad Fire-safe Certified API 607 Anti-Static Device Bi-directional Sealing Low Fugitive Emission Packing Locking Device Standard Chenggong Valve, one of the leading manufacturers of various valves in China, now brings you the best quality forged steel double block and bleed dbb ball valve with flange or thread ends lever operation with high precision and reliable performance. Under strict quality control and management system, we will offer the best forged steel double block and bleed dbb ball valve with flange or thread ends lever operation in time on qualified orders. Now, take action to contact our factory.DBB Ball Valve website:http://www.cg-valve.com/ball-valve/dbb-ball-valve/