V/SV-AD-IIB3
Vacuum Relief Valve deflagration-proof
Características
Función y descripción
Highly Developed Vacuum Relief Valve
The Deflagration Deflagration Explosion propagating at subsonic velocity. Proof V/SV-AD Type PROTEGO® valve is a highly developed vacuum relief valve Vacuum relief valve A vacuum relief valve is used to ventilate a part of the system and protects it from impermissible underpressure. for high flow capacities with an integrated Flame Arrester Unit PROTEGO® flame arrester unit The PROTEGO® flame arrester unit is the main component of a flame arrester. It prevents flame propagation. . It is primarily used as a safety device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. for flame-transmission-proof in-breathing in tanks, containers, and process equipment Equipment Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion. . The valve offers reliable protection against vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. and prevents in-breathing of air almost up to the set pressure Set pressure Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. ; while at the same time protecting against atmospheric deflagration. The PROTEGO® Flame Arrester Flame arrester Device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but prevent the transmission of a flame. unit is designed to achieve minimum pressure Pressure (gauge pressure) Pressure for which the value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure. drop with maximum safety. The Deflagration-Proof PROTEGO V/SV-AD valve is available for substances for explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group IIB3 (C MESG ≥ 0.65 mm).
10%-Technology
When the set vacuum Set vacuum Internal negative gauge pressure at which a vacuum valve first opens. is reached, the valve starts to open and reaches full lift Lift Lift is the actual travel of the valve pallet from the main valve out of the closed position. within 10% overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. . This unique 10% technology 10% technology PROTEGO® pressure and vacuum relief valves with full-lift pallet release the flow within 10% overpressure from the set pressure to a fully opened valve (full-lift). enables a set vacuum that is only 10% above the maximum allowable working vacuum (MAWV) of the tank. After years of development, this typical opening characteristic of a safety relief valve is now also available for the low pressure range.
Advanced Manufacturing Technology
The tank pressure Tank pressure Tank pressure is the pressure within a tank. is maintained up to the set vacuum with a tightness that is above to the normal standards due to our state-of-the-art manufacturing technology. This feature is ensured by the valve seats made of high quality stainless steel and with individually lapped valve pallets (1), or with an air cushion seal Seal A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements. (2), in conjunction with high quality FEP diaphragm Diaphragm A diaphragm is a thin layer of material, which has a large surface area. . The valve pallets are also available with a PTFE seal to prevent them from sticking when sticky substances are used and to enable the use of corrosive fluids. After the vacuum is balanced, the valve re-seats and provides a tight seal. If the valve is used in atmospheres forming an explosive mixture with air and the mixture ignites, the integrated PROTEGO® Flame Arrester Unit (3) prevents flame transmission into the tank.
Many Individual Certifications
The standard design is tested at an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of up to +60°C / 140°F and meets the requirements of European tank design standard EN 14015 (Appendix L) and ISO 28300 (API 2000). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Dimensiones
To select the nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (DN), please use the flow capacity chart on the following page
| DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" |
| a | 337 / 13.27 | 395 / 15.55 | 515 / 20.28 | 713* / 28.07* | 808* / 31.81* | 925* / 36.42* | 946 / 37.24 |
| b | 247* / 9.72* | 312 / 12.28 | 358 / 14.09 | 443 / 17.44 | 520 / 20.47 | 588 / 23.15 | 588 / 23.15 |
Dimensiones en mm / pulgadas
Selección de materiales para la vivienda
| Design | A | B | C |
| Housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. | Aluminum | Steel | Stainless Steel |
| Heating jacket (V/SV-AD-H-...) | – | Steel | Stainless Steel |
| Valve seat Valve seat The valve seat is a component on which the valve pallet rests when the valve is closed. | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | PTFE | PTFE | PTFE |
| Cover | Aluminum | Stainless Steel | Stainless Steel |
| FLAMEFILTER® | Stainless Steel | Stainless Steel | Stainless Steel |
Special materials upon request
Material selection for valve pallet
|
Special materials and higher pressure settings upon request
Selección del grupo de explosión
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| ≥ 0,65 mm | IIB3 | C |
Special approvals upon request
Especificación de la máx. temperatura de operación
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
| - | Designation |
higher operating temperatures upon request
Tipo de bridas de conexión
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other types upon request
Modelo y especificación
The valve disc is weight-loaded.There are two different designs:
Additional special devices available upon request
Settings
| Vacuum: | -2.0 mbar | -35 mbar |
| -0.8 inch W.C. | -14 inch W.C. |
Higher vacuum settings upon request
Diagrama de flujo volumétrico
Los diagramas de flujo volumétrico han sido determinados con un banco de pruebas de caudal calibrado y certifi - cado por TÜV. El flujo volumétrico V. en [m³/h] y el CFH se refi eren a las condiciones estándar de referencia de aire según ISO 6358 (20°C, 1bar). La conversión a otras densidades y temperaturas están referidas en el Vol. 1: “Fundamentos Técnicos”.
