Pre-Torque Holder design for use with Forward Acting Series Disks (FA-Series). 

Pre-Torque Holder Design allows pre-assembly of a rupture disk (bursting disk) into a holder prior to field installation:

• FAH Series offers one unique holder design that fits with multiple types of ZOOK Forward-Acting metal rupture disks (FAC, FAX)
• Pre-Torque Design allows for:
  1. Pre-assembly of a rupture disk into a holder prior to field installation
  2. Removal of the assembly from the piping system for inspection without disturbing the seal integrity of the rupture disk
  3. Pre-torque bolts properly seat the disk by engaging the holder bite
• Disk dome is contained within inlet holder which prevents damaging the disk during installation into mating flanges
• Locating pin allows only forward-acting type disks to be mounted into holder
• Fluoropolymer coated socket head cap screws resists corroding to holder assembly and provides easy removal without special sockets
• Polyethylene cap screw covers prevents debris from building up in cap screw head
• Sizes 1” thru 12”
• Standard cast holder materials: Carbon Steel (WCB), Stainless Steel (CF3M), Hastelloy (CW12MW)
• Holder information is permanently affixed to the O.D. of holder
• Bubble tight metal-to-metal bite and disk seal
• Flow direction arrows on disk tag and holder provide permanent visual verification that holder assembly is properly oriented in the piping system
• ANSI, DIN, and JIS Flange class and type specific, guards against installing an assembly into mating flanges with a different pressure rating than the rupture disk holder
• Positioning hole in mounting lug is located in the exact position as the mating flange and allows for proper alignment. It can also be used as an extra “hand” when installing into horizontal piping
• For custom materials and alternative flanges (types/ratings) ZOOK offers custom inserts (FAHI) or full flanges (FAH7) and custom overall heights