Description
The union-type holder offers flexibility, ease of installation, and high-pressure ratings in compact piping configurations. The union-type holder is available only for pipe sizes of 2″ (50 mm) or smaller. These holders are designed for use with Standard or Composite (LL) rupture discs.
Rupture discs for union-type holders are generally shipped with a loose tag, which must be attached to the assembly once the rupture disc is installed. When ordering your rupture discs, let us know if you plan to install them in a union-type holder and whether you need the standard configuration or a permanently attached flow tag.
Size, pressure rating, and flow direction specifications are laser-marked on the assembly.
Available sizes, ratings, and diameters: See Table 12, Union Holder Assembly Number and Connections, and Table 13, Union Holder Specifications.
Contact the factory for applications outside this range.
Any combination of welded or threaded connections is available.
Seat configuration: 30˚ seat
Ideal for use with standard and composite rupture discs.
Available materials: Carbon steel, 316 SS
Otros materiales disponibles bajo solicitud.
Available sizes: 1/2″ (hex only), 1″, 1½”, 2″
See Table 4, Minimum/Maximum Burst Pressures for Standard Rupture Discs at 72˚ F (22˚ C), and Table 5, Minimum/Maximum Burst Pressures for Composite Rupture Discs at 72˚ F (22˚ C), for rupture disc details.
Our options and accessories ensure that our rupture discs and holders perform in any environment. Consult a representative if you are not sure which one you need.
Liners, coatings, and other corrosion-resistant protective materials available upon request.
Gaskets for a perfect seal, even on scratched or pitted disc holders.
Guard rings to prevent damage to fragile rupture discs and delicate liners from foreign material in the seat area.
Cleaning for oxygen or chlorine service.
Optional flow tag compatibility
For those who require positive identification of rupture disc installations, a special union-type holder allows installation of a rupture disc with a permanent flow direction tag. The flow tag extends beyond the holder to make it easy to verify orientation after installation (not available in the 2″ 2000# configuration).
Dampening plugs
If the unit has a threaded outlet, we can add a dampening plug to reduce reaction forces when the disc ruptures and redirect fragments or product so they do not scatter directly from the nozzle. Contact us for more information.
Wing nut, hex, and hammer nut options available
Wing nut union holders feature coarse-thread nuts and subs for maximum strength and easy assembly.
Wing nut and hammer nut union holders are supplied with extra-heavy hammer lugs, a favorite of field personnel replacing rupture discs in hard-to-reach locations.