V R D
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Catalog excerpts

VRD® Reverse Acting Rupture Disc Assembly 3-2230-3

FOR FIXED PIPING ARRANGEMENTS When Size Matters Introducing the VRD® Reverse Acting Rupture Disc Assembly. This all-new rupture disc and holder system combines all the benefits of our scored, reverse acting line of rupture discs with the additional feature of a reduced holder height. You now have the flexibility of using our reverse acting rupture discs in existing fixed piping systems. The VRD Assembly is available in a wide variety of sizes, materials, and pressure ranges. The specifications for the standard VRD Assembly can be found on pages 4-5. For information on applying the VRD to...

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THE VRD RUPTURE DISC Zero Manufacturing Range/ 90% Operating Pressure As a standard, the VRD Rupture Disc is designed with a zero manufacturing range. This enables system operation up to 90% of the rated (marked) burst pressure for burst pressure settings of 40 psig and above. For rated burst pressures below 40 psig, the recommended maximum operating pressure is 90% of the value of the rated (marked) burst pressure minus the burst tolerance (i.e.: max. operating pressure = [marked rating minus 2 psig burst tolerance] x 0.90). Safety Ratio The VRD Rupture Disc is designed and tested to have...

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SPECIFICATIONS Table I – VRD Minimum / Maximum Burst Pressures at 72°F (22°C) White bars indicate psig. Gray bars indicate barg. Rupture Disc Materials 316 Stainless Steel / Inconel®* Nickel / Monel * Minimum For Liquid Service As Standard Minimum For Liquid Service As Standard Minimum For Liquid Service As Standard Table II – VRD Temperature Limits Rupture Disc Material Nickel Manufacturing Range As a standard, the VRD Rupture Disc is designed with a zero manufacturing range. This enables the disc to operate up to 90% of the customer’s specified rating. For systems not required to operate...

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VRD INSERT HOLDER VRD Holder The VRD Holder is an insert type holder. It has been designed for ease of assembly and superior sealing capability. Alignment of the VRD Rupture Disc and flow direction orientation are provided by round offset pins located in the holder inlet and matching holes in the rupture disc rings. Rupture Disc Name Plate Holder Outlet A tapered, raised seat on the inlet holder provides uniform load on the rupture disc, insuring a metal-to-metal leak-tight seal between the disc and holder. The rupture disc and holder parts are pre-assembled using pre-assembly clips. As a...

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VRD HOLDER Holder Specifications VRD Holders are available for ANSI, DIN, JIS class flanges as shown in Table III. Consult the factory for holders to fit other national or international standards. Table III – VRD Insert Holder Dimensions and Weights Nominal Size 1 in Outside Diameter NOTE: Consult the factory for availability of flange classes not listed.

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HOW TO ORDER To assure selection of the correct rupture disc and holder for your application, please determine: Quality Assurance/ Documentation: Operating Specifications: 1. Codes: ASME, EN, DIN, JIS, BSI or others 5. Options (linings, coatings, B.D.I.) 6. Specified pressure/specified temperature 7. Manufacturing range: zero, -5%, -10% ; -2.5 psig, -5 psig 6. Material test reports 7. Other 1. Maximum allowable working pressure (vessel M.A.W.P.) 2. Operating pressure 3. Operating temperature 4. Vacuum/backpressure 5. Cycle conditions 6. Flow rate required 7. Media 8. Previous manufacturing...

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ASME Code Symbol Stamp Available When Specified China Manufacture License Available When Specified Pressure Equipment Directive Available When Specified Continental Disc Corporation has representatives located throughout the world. Contact the C.D.C. office nearest you for the authorized representative in your area. CORPORATE HEADQUARTERS Continental Disc Corporation 3160 W. Heartland Drive Liberty, MO 64068-3385 USA Continental Disc Corporation Energieweg 20 2382 NJ Zoeterwoude-Rijndijk The Netherlands Continental Disc Corporation Room 910, Tower B, COFCO Plaza No. 8 JianGuoMenNei Avenue...

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