CAL-VAC® / POS-A-SET® Rupture Disc Assemblies
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CAL-VAC® / POS-A-SET ® Rupture Disc Assemblies The CAL-VAC / POS-A-SET Rupture Disc Assembly is a highly accurate, double acting pressure relief device designed to protect processing and storage tanks against implosion or overpressure condition that can occur: • when too much vacuum is pulled during liquid product withdrawal • during hot water or steam cleaning of tanks • from development of an abnormal process condition CAL-VAC Assembly Both designs relieve pressure settings starting as low as 1" water column differential. The difference in performance of the CAL-VAC Rupture Disc and the POS-A-SET Rupture Disc is how each one is installed (oriented) in the system. The CAL-VAC Rupture Disc relieves ultra low pressure in the vacuum (negative) pressure direction, while the POS-A-SET Rupture Disc relieves ultra low pressure in the positive pressure direction. POS-A-SET Assembly

CAL-VAC RUPTURE DISC How a CAL-VAC Rupture Disc Works CAL-VAC Rupture Disc Assembly The CAL-VAC Rupture Disc is a double acting rupture disc which will relieve an ultra low (inches of water column) vacuum (negative) pressure or a positive pressure condition (psig). The CAL-VAC Rupture Disc has a flat seat design to reduce susceptibility to product buildup and promote easier cleaning to meet FDA requirements. NO MOVING PARTS eliminates the possibility of mechanical malfunction and assures proper operation. Vacuum Relief Controlled By A Girdle Design features include: As a negative (vacuum)...

CAL-VAC HOLDERS CAL-VAC INSERT HOLDER The CAL-VAC Insert Holder is designed for installation between ASME, JIS or DIN class flanges as shown in Table V, page 5. It is available in sizes 3" through 12" (80 – 300mm). Locator pins on the holder inlet assure proper rupture disc alignment. A Knifeblade Assembly with PRECISION-HONED EDGES is permanently affixed in the holder inlet to provide maximum vacuum relief. Prior to installation, the CAL-VAC Rupture Disc and holder parts are preassembled using stainless steel preassembly clips. VACUUM PRESSURE POSITIVE PRESSURE CAL-VAC SANITARY FITTING...

CAL-VAC RUPTURE DISC SPECIFICATIONS Manufacturing Range / Burst Tolerance Table I - CAL-VAC Rupture Disc Top Section Minimum / Maximum Burst Rating at 72°F (22°C) Burst Pressure Manufacturing Range is defined as the allowable pressure range within which a rupture disc is rated. It is based upon the customer specified burst pressure. The manufacturing range for the CAL-VAC rupture disc top section varies depending upon the burst rating. Nominal Size Insert Type Holder Sanitary Fitting Type Holder After the top section has been manufactured and tested, it is stamped with the rated burst...

CAL-VAC INSERT HOLDER CAL-VAC INSERT HOLDER Table V - CAL-VAC Insert Holder    Dimensions and Weights CAL-VAC Insert Holders are machined from standard materials including carbon steel, 304 SS and 316 SS. Standard knifeblade materials include heat-treated 17-7 PH stainless steel or 316 SS. Consult the factory for availability of other holder or knifeblade materials. Weights and dimensions for this holder are shown in Table V. Maximum Pressure Rating at 72°F (22°C) (psig / barg) DIN Outside Diameter (inch / mm) Outside Diameter (inch / mm) Outside Diameter (inch / mm) Nominal Size CAL-VAC...

POS-A-SET RUPTURE DISC POS-A-SET Rupture Disc Assembly How a POS-A-SET Rupture Disc Works The POS-A-SET Rupture Disc is a double acting rupture disc which will relieve an ultra low (inches of water column) positive pressure or a vacuum (negative) pressure condition (psig). The POS-A-SET Rupture Disc has a flat seat design to reduce susceptibility to product buildup and promote easier cleaning to meet FDA requirements. NO MOVING PARTS eliminates the possibility of mechanical malfunction and assures proper operation. Positive Pressure Relief Design features include:PER GIRDLE... of...

POS-A-SET HOLDERS POS-A-SET INSERT HOLDER The POS-A-SET Insert Holder is designed for installation between ASME, JIS or DIN class flanges as shown in Table XI. It is available in sizes 3" through 12" (80 – 300mm). Locator pins on the holder inlet assure proper rupture disc alignment. A Knifeblade Assembly with PRECISION-HONED EDGES is permanently affixed in the holder outlet to provide maximum positive pressure relief. Prior to installation, the POS-A-SET Rupture Disc and holder parts are preassembled using stainless steel preassembly clips. VACUUM PRESSURE POSITIVE PRESSURE POS-A-SET...

POS-A-SET RUPTURE DISC SPECIFICATIONS Manufacturing Range / Burst Tolerance Table VII - POS-A-SET Rupture Disc Top Section     Minimum / Maximum Burst Rating at 72°F (22°C) Burst Pressure Manufacturing Range is defined as the allowable pressure range within which a rupture disc is rated. It is based upon the customer specified burst pressure. The manufacturing range for the POS-A-SET rupture disc top section varies depending upon the burst rating. Nominal Size Insert Type Holder Sanitary Fitting Type Holder After the top section has been manufactured and tested, it is stamped with the rated...

POS-A-SET INSERT HOLDER POS-A-SET INSERT HOLDER Table XI - POS-A-SET Insert Holder      Dimensions and Weights POS-A-SET Insert Holders are machined from standard materials including carbon steel, 304 SS and 316 SS. Standard knifeblade materials include 17-7PH stainless steel, heat-treated or 316 SS. Consult the factory for availability of other holder or knifeblade materials. Weights and dimensions for this holder are shown in Table XI. Maximum Pressure Rating at 72°F (22°C) (psig / barg) ASME Class Outside Diameter (inch / mm) OUTSIDE DIAMETER Outside Diameter (inch / mm) Outside Diameter...

B.D.I.® ALARM SYSTEM B.D.I.® Alarm System When immediate notification of pressure or vacuum relief is required, Continental Disc Corporation's B.D.I. (Burst Disc Indicator) Alarm System should be used. Designed for use with any Continental model rupture disc, the B.D.I. Alarm automatically notifies an operator, through audio and/or visual warnings, WHEN and WHERE a rupture disc has relieved positive or vacuum overpressure. This enables the operator to promptly respond to an abnormal process condition or to improper equipment operation or inadequate cleaning. The heart of the B.D.I. system...