Reverse Buckling (Compression Loaded) Rupture Discs – Bursting Discs

FDC – Reverse Buckling (Compression Loaded) Rupture Discs – Bursting Discs

These rupture discs are produced by FDC, who have over 25 years of experience in this highly competitive international market. Their products can be specified to product standards including KS B ISO 4126, KOSHA, ASME Code Section VIII, API RP520, and the ISO-9001:2008 quality system.

KSRR

Design:
· Reverse Dome Knife Type
· It is used with installation on FDC standard holder
· Reversal structure ruptured by knife blade attached upper holder while dome is inverted

KSRRK

Design:
· Reverse Dome Shear Type
· It is used with installation on FDC standard holder
· It is integrated with Disc and Knife
· Shearing structure ruptured by knife ring attached to disc while dome is inverted

Also available:
· KSRRKF: Reverse Dome Shear Type for Ferrule (same as KSRRK but used with installation on Ferrule Connection without holder)

KSRSR

Design:
· Reverse Dome Scored Type
· It is used with installation on FDC standard holder
· Carved structure ruptured while inverted along with Scored Line processed precisely

KSRBKH

Design:
· Reverse Dome Buckling Knife Type
· It is used with installation on FDC standard holder
· It consists of Control Disc and Seal Disc
· Ruptured while dome is sheared by Knife of Control Disc

Also available:
· KSRBK: Reverse Dome Buckling Knife Type for Flange (same as KSRBKH but used with installation on Flange without holder)

MARSTON Reverse Buckling (Compression Loaded) Rupture Discs – Bursting Discs

Usually a single foil disc which has the pressure applied to its convex side. The dome inverts and is completely expelled from its holder and stopped by an arrestor. This proven design is unique to Marston and is Marston’s first design reverse buckling discs and is still available on the market.. This disc has superior performance attributes than tension loaded discs. It can be operated from full vacuum to 95% of its burst pressure in pressure cyclic conditions,

Usually a single foil disc which has the pressure applied to its convex side. The dome inverts and opens along a peripheral groove. It is designed to be retained by its hinge portion. This scored reverse buckling disc opens cleanly along its circular score lines. It has superior performance compared to tension loaded discs. It can be operated from full vacuum to 95% of its minimum burst pressure. It is suitable for liquid (see LRB)  or gas service (RBH)  and ideal for relief valve isolation. It has a flat seated design and is non torque sensitive. Its performance is guaranteed with its interaction with its designed holder – mostly insert type due to its non torque sensitivity.

Usually a single foil disc which has the pressure applied to its convex side. The dome inverts and opens along a peripheral groove. It is designed to be retained by its hinge portion. This scored reverse buckling disc opens cleanly along its circular score lines. It has superior performance compared to tension loaded discs. It can be operated from full vacuum to 95% of its minimum burst pressure. It is suitable for liquid (see LRB)  or gas service (RBH)  and ideal for relief valve isolation. It has a flat seated design and is non torque sensitive. Its performance is guaranteed with its interaction with its designed holder – mostly insert type due to its non torque sensitivity.

This disc has two membranes. A load-bearing slotted metallic membrane and a weaker, usually fluoropolymer, seal membrane giving a non-fragmenting design suitable for low bursting pressures.

A single metallic foil which has the pressure applied to its convex side. The dome inverts and opens along radial grooved lines. It is designed to retain ll parts and withstand full vacuum without the aid of a vacuum support.

The RBH range of reverse buckling discs has been adapted for use in the well-proven hygienic clamp fittings, widely adopted by the pharmaceutical, biotechnology, brewing, dairy and similar industries; anywhere that high
levels of hygiene are essential.

The discs are provided with a profiled seal that conforms exactly to the pipe ferrule flanges ensuring that there are no crevices for product deposits. The non-fragmenting disc design is such that there will be minimal restriction to vent flow in the event of the disc rupturing due to an excessive pressure.