GLP-S™ Reverse Buckling Disk
2Pages

BS&B SAFETY SYSTEMS, L.L.C. BS&B SAFETY SYSTEMS LTD Low Pressure Sanitary Reverse Buckling Rupture Disk The type LP-C™ Safety Head holder with tri-clamp inlet & outlet connections provides quick and easy installation of the GLP-S™ reverse buckling disk into sanitary/aseptic piping. US Patents 5,996,605, 6,178,983 and apply. Other international patents pending. The GLP-S offers the lowest pressure, solid metal, reverse buckling disk that is resistant to vacuum. Designed for installation into sanitary/aseptic piping using the LP-C safety head, the GLP-S adds a new capability for the designer of pharmaceutical, biotechnology, food industry and other clean service pressure relief systems. Low burst pressures from 5psi (0.34 Bar) Solid metal design Designed for gas, liquid or two-phase service Stainless Steel, Nickel Alloy and Tantalum materials available “Fail-safe” design – Damage Safety Ratio <1 Designed for non-fragmentation Vacuum/back pressure resistant High operating ratio; up to 90% of minimum burst pressure Sizes 1 1/2” - 4” tri-clamp connections Ideal for CIP/SIP (clean in place/steam in place) service Available SAS burst disk sensor option Utilizes SAF™ technology (Structural Apex Forming) for enhanced performance The GLP-S is a reverse buckling rupture disk designed with a circular score located on the outlet side of the disk dome. At the burst pressure, the disk’s dome reverses and opens by shearing the circular score line leaving a single petal which is held captive by the “hinge ring” integral to the vent side of the disk. The GLP-S uses SAF™ technology enabling very low burst pressures to be achieved with excellent performance characteristics. The GLP-S disk is designed for use in the LP-C safety head. The nominal size of the GLP-S rupture disk is the same as the inlet and outlet tri-clamp connections. The two halves of the LP-C safety head, with the GLP-S rupture disk installed, are held together using a larger tri-clamp connector supplied with the LP-C holder. Table 2 identifies the three tri-clamp connections for each GLP-S disk size; it is the mid-clamp that is supplied with the LP-C holder. The table also identifies the area to be used for GLP-S pressure relief system sizing calculations (MNFA in square inches is provided for calculations in line with ASME practices/NRA in square centimeters is provided for calculations in line with ISO and EN practices). Table 2: Rupture Disk and Safety Head Sizes and Connections Disk Safety Head MNFA NRA Size Inlet* Mid-clamp conn. Outlet* Overall Height in mm in mm in mm in mm in mm in2 cm2 50 1 1/2" 40 3 1/4" 83 0.86 4.9 1 1/2" 40 1 1/2" 40 2" 2" 50 2" 50 2 1/2" 65 2" 50 3" 76 1.93 11.3 3" 80 3" 80 4" 100 3" 80 4" 102 3.36 19.7 4" 100 4" 100 6" 150 4" 100 5 1/2" 140 7.39 40.8 These dimensions correspond to the size of tri-clamp fitting to which the LP-C holder is connected. The connection is the same at the inlet and outlet in all cases and also the same as the disk nominal size. The LP-C safety head nominal size is determined by the inlet and outlet connection size. Ex: a 1 1/2” LP-C Safety Head has inlet and outlet tri-clamp connections size 1 1/2” and is designed for use with a size 1 1/2” GLP-S rupture disk. Sensors Optional Sanitary Alert Sensors (SAS) are available for use between standard sanitary/aseptic fittings to provide warning of a burst rupture disk. Vacuum Resistance / Back Pressure Resistance The GLP-S disk will resist vacuum without any additional vacuum support. Back pressure resistance is limited to 15psi (1.03 Bar) for disks rated to burst at 15psi (1.03 Bar) or less. For higher burst pressures, back pressure resistance is limited to the minimum bur

GLP-S Material Options Standard materials for the GLP-S disk are Stainless Steel (grades 316 and 316L), Nickel alloy 200, Inconel® (Nickel alloy 600), Monel® (Nickel alloy 40(5), Hastelloy® C-276, and Tantalum. Please note the operating tempera- ture information indicated in Table 3. Typically it will be the users selected tri-elamp gasket (not supplied) that determines (he operating temperature limitation of an application. The GLP-S disk includes an outlet side hinge to control fragmentation when the disk bursts. Standard disk hinge materi- al is Stainless Steel 316 with alternates...