VD/SV-HRL
Pressure/Vacuum Relief Valve deflagration- and endurance burning-proof
Características
Función y descripción
Combined Pressure and Vacuum Relief Valve
The Atmospheric Deflagration and Endurance Burning-Proof VD/SV-HRL Type PROTEGO® valve is a highly developed combined pressure/vacuum relief valve for high flow capacities with an integrated Flame Arrester. It is primarily used as a device for flame transmission proof in-breathing and out-breathing on tanks, containers, and process equipment. The valve offers reliable protection against overpressure and vacuum, prevents the in-breathing of air and product losses almost up to the set pressure, and protects against atmospheric eflagration and endurance burning if stabilized burning occurs.
10%-Technology
The PROTEGO® Flame Arrester Unit is designed to achieve minimum pressure drop with maximum safety. The PROTEGO® VD/SV-HRL device is available for substances of explosion group IIA (NEC group D MESG > 0.9 mm). When the set pressure is reached, the valve starts to open and reaches full lift within 10% overpressure. This unique 10% technology enables a set pressure that is only 10% below the maximum allowable working pressure ( MAWP Maximal erlaubter Betriebsdruck (MAWP) Maximaler zulässiger Überdruck im oberen Bereich eines kompletten Behälters in normaler Betriebsstellung bei der genannten übereinstimmenden Temperatur, die für diesen Druck spezifiziert ist. ) or 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 is maintained up to the set pressure with a tightness that is above The normal standards due to our tate-of-the-art manufacturing technology. This feature is ensured by valve seats made of high quality stainless steel and with individually lapped valve pallets (1), or with an air cushion seal (2), in conjunction with high quality FEP diaphragm. 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 overpressure s released, the valve re-seats and provides a tight seal.
Main Component – PROTEGO® Flame Arrester Unit
If the set pressure is exceeded, explosive gas/product vapor/air mixtures are released into the atmosphere. If this mixture ignites, the integrated PROTEGO® Flame Arrester Unit (3) revents flame transmission into the tank. If additional mixture continues to flow and stabilized occurs, the integrated Flame Arrester prevents flashback as a result of endurance burning. The valve is protected and also fulfils its function under thesesevere conditions. The spring-loaded weather hood opens as soon as the melting element (4) melts.
Many Individual Certifications
The valve can be used at an operating temperature of up to +60°C /140°F and meets he 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 (DN), please use the flow capacity charts on the following pages
| DN | 100 / 4" | 150 / 6" |
| a | 650 / 25.59 | 760 / 29.92 |
| b | 1000 / 39.37 | 1155 / 45.47 |
| c | 600 / 23.62 | 600 / 23.62 |
Dimensiones en mm / pulgadas
Selección de materiales para la vivienda
| Design | A | B |
| Housing | Steel | Stainless Steel |
| Valve saets | Stainless Steel | Stainless Steel |
| Gasket | PTFE | PTFE |
| Weather hood | Steel | Stainless Steel |
| Flame arrester unit | A, B | B |
Special materials upon request
Combinación de materiales para la unidad apagallamas
| Ausführung | A | B |
| FLAMEFILTER® cage | Steel | Stainless Steel |
| FLAMEFILTER® | Stainless Steel | Stainless Steel |
Special materials upon request
Selección de materiales para la válvula de presión
| Design | A | B | C | D |
| Pressure range [mbar] [inch W.C.] | +3.5 up to +5.0 +1.4 up to +2.0 | >+5.0 up to +14 >+2.0 up to +5.6 | >+14 up to +35 >+5.6 up to +14 | >+14 up to +35 >+5.6 up to +14 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal | PTFE |
Special material as well as higher set pressure upon request
Selección de materiales para la válvula de vacío
| Design | A | B | C | D |
| Vacuum range [mbar] [inch W.C.] | -2.0 up to -3.5 -0.8 up to -1.4 | <-3.5 up to -14 <-1.4 up to -5.6 | <+14 up to +35 <-5.6 up to -14 | <-14 up to -35 <-5.6 up to -14 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal | PTFE |
Special material as well as higher set vacuum upon request
Selección del grupo de explosión
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| > 0,90 mm | IIA | D |
Special approvals 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
Any combination of vacuum and pressure levels can be set for the valveThe valve discs are weight-loaded.
Additional special devices available upon request
Settings
| Pressure: | +3.5 mbar | +35 mbar |
| +1.4 inch W.C. | +14 inch W.C. | |
| Vacuum: | -2.0 mbar | -35 mbar |
| -0.8 inch W.C. | -14 inch W.C. |
Higher and lower 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”.
