VD/SV-PA(L)
Pressure and Vacuum Relief Valve with pipe-away connection
Features
Tecnología del 10%
para un aumento mínimo de presión hasta alcanzar la apertura completa
Extrema estanqueidad
Lo que se traduce en las menores pérdidas posibles de producto y en una reducción de la contaminación ambiental
Mantenimiento óptimo de la presión
Basado en la tecnología del 10 %, la presión de tarado está muy próxima a la presión de apertura para un mantenimiento óptimo de la presión en el sistema, en comparación con la tecnología convencional del 40 % o del 100 %
Flujo volumétrico
Flujo de caudal optimizado
Se usa en zonas con riesgo de explosión
Puede utilizarse en zonas con riesgo de explosión
Drenaje de condensados
Drenaje de condensados automático
Tanques API
la mejor tecnología para tanques API
Function and Description
Combined Pressure and Vacuum Relief Valve
The VD/SV-PA(L) Type PROTEGO® valve is a highly developed pressure and vacuum relief valve with excellent flow performance. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, and process equipment to protect against unallowable overpressure and underpressure. The valve prevents emission losses almost up to the set pressure and prevents air intake almost up to the set vacuum. The product vapors can be released through a collective line connected to the line flange on the pressure side.
Full Lift Technology
The device will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift. Continuous investments in and a commitment to research and development have allowed PROTEGO® to develop a low pressure valve which has the same opening characteristic as a high pressure safety relief valve. This “Full Lift Type” technology allows the valve to be set at just 10% below the maximum allowable working pressure or vacuum (MAWP or MAWV) of the tank and still safely vent the required mass flow. The opening characteristic is the same for pressure and vacuum relief.
Due to our highly developed manufacturing technology, the tank pressure is maintained up to set pressure with a tightness that is far superior to the conventional standard.
Advanced Manufacturing Technology
This feature is valve seats made of high quality stainless steel and achieved by valve seats made of high quality stainless steel and with precisely 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 the valve pallets from sticking when sticky products are used and to enable the use of corrosive substances. After the excess pressure is released or the vacuum is balanced, the valve reseats and provides a tight seal.
The optimized fluid dynamic design of the valve body and valve pallet is a result of many years of research, resulting in a stable operation of the valve pallet, optimized performance, and reduced product losses.
Product Data
Dimensiones
To select the nominal size (DN), use the flow capacity charts on the following pages
| VD / SV-PA | |||||||
| DN 1 | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" |
| DN 2 | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" |
| a | 405 / 15.95 | 480 / 18.90 | 600 / 23.62 | 805 / 31.69 | 925 / 36.42 | 1010 / 39.76 | 1010 / 39.76 |
| b | 390 / 15.35 | 485 / 19.09 | 550 / 21.65 | 660 / 25.98 | 780 / 30.71 | 875 / 34.45 | 875 / 34.45 |
| c | 150 / 5.91 | 180 / 7.09 | 200 / 7.87 | 250 / 9.84 | 300 / 11.81 | 305 / 12.01 | 305 / 12.01 |
| d | 240 / 9.45 | 300 / 11.81 | 330 / 12.99 | 390 / 15.35 | 480 / 18.90 | 555 / 21.85 | 582 / 22.91 |
| e | 165 / 6.50 | 192 / 7.56 | 240 / 9.45 | 350 / 13.78 | 390 / 15.35 | 460 / 18.11 | 460 / 18.11 |
| VD / SV-PAL | |||||||
| DN 1 | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" |
| DN 2 | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" |
| a | 395 / 15.55 | 445 / 17.52 | 565 / 22.24 | 770 / 30.31 | 895 / 35.24 | 1010 / 39.76 | 1010 / 39.76 |
| b | 400 / 15.74 | 485 / 19.09 | 550 / 21.65 | 655 / 25.79 | 775 / 30.51 | 875 / 34.45 | 885 / 34.84 |
| c | 140 / 5.51 | 143 / 5.63 | 165 / 6.50 | 216 / 8.50 | 267 / 10.51 | 305 / 12.01 | 305 / 12.01 |
| d | 255 / 10.04 | 308 / 12.13 | 355 / 13.98 | 417 / 16.42 | 505 / 19.88 | 582 / 22.91 | 603 / 23.74 |
| e | 165 / 6.50 | 192 / 7.56 | 240 / 9.45 | 350 / 13.78 | 390 / 15.35 | 460 / 18.11 | 460 / 18.11 |
Dimensiones en mm / pulgadas
Dimensions of pressure and vacuum relief valves with heating jacket upon request
Selección de materiales para la vivienda
| Design | A | B | C |
| Housing | Aluminium | Steel | Stainless Steel |
| Heating jacket (VD / SV-PA(L)-H-...) | – | Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | PTFE | PTFE | PTFE |
Option: Housing with ECTFE-lining
Special materials upon request
Selección de materiales para la válvula de presión
| Design | A | B | C | D | E | F |
| Pressure 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 | >+35 up to +60 >+14 up to +24 | >+14 up to +35 >+5.6 up to +14 | >+35 up to +60 >+14 up to +24 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal | Metal to Metal | PTFE | PTFE |
Special materials as well as higher set pressure upon request
Selección de materiales para la válvula de vacío
| Design | A | B | C | D | E | F |
| Pressure 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 <-5.6up to -14 | <-35 up to -60 <-14 up to -24 | <-35 up to -60 <-14 up to -24 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal | Metal to Metal | PTFE | PTFE |
Special material as well as higher set vacuum upon request
Tipo de bridas de conexión
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other types 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”.
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