Carbon Steel Body Fire Safe Seat High Pressure Concentric Butterfly Valve

Carbon Steel Body Fire Safe Seat High Pressure Concentric Butterfly Valve

• Automated with Pneumatic Spring Return Actuator
• Automated with Pneumatic Double Acting Actuator
• Automated with Electric Actuator (optional Explosion Proof)
• Wafer and Lug Style
• Sizes 2” – 36”( larger sizes available)

Features and Benefits

• Standard body materials are 316 SST or WCB. Application specific options include: Alloy 20, Monel, CD3MN, Hastelloy C, Inconel 625, Aluminum Bronze, LCB and others.
• Standard seat materials are RTFE, RTFE/316L SST (Firesafe), and 316L SST (metal seat). Application specific seat materials include: 50/50 STFE, PTFE, PEEK, UHMWPE, TFM-1600 and Inconel 625.
• RTFE and Firesafe seat designs offer bubble-tight, bi-directional shutoff to full ANSI/ASME Class 150# and 300# standards. Metal seat design offers Class V shutoff.
• Blow out proof stem design
• Square Stem
  Stem design facilitates direct mounting of pneumatic and electric actuators or gear operators through 12”. Standard Stem Material is 316 SST for 150# and 17-4 pH or XM-19 for 300#.
• Live Loaded Packing
  Power-Seal HPBFVs come standard with Live Loaded packing. Three sets of Belleville washers are added to each gland stud to maintain a self-adjusting packing load.
• Application Specific Stem Packing
  Standard packing is Graphite. Application specific options include: Double PTFE V-ring or Double PTFE Inverted packing.
• Internally Cast Travel Stop
  Travel Stop prevents over rotation of the disc in an effort to limit possible seat damage.
• Seat Retainer Design
  Seat retainer is designed so the fasteners do not interfere with the flange gasket sealing surface.

Seat Designs

Soft Seat design
RTFE seat for bubble-tight shutoff of general purpose applications up to 450°F.

RTFE/316L SST fire-safe seat design
Primary RTFE seat for bubble-tight shutoff backed up by secondary 316L SST fire-safe seat. Secondary fire-safe seat provides Class V shutoff when primary RTFE seat is compromised in a fire event.