D/PA(L)
Pressure or Vacuum Relief Valve com bocal de conexão para o tubo coletor de escape
Características
Função e descrição
Combined Pressure and Vacuum Relief Valve
The D/PA(L) Type PROTEGO® valve is a highly developed pressure/vacuum relief valve Soupape de surpression/dépression Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as 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 Surpression Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and underpressure. The valve prevents emission losses almost up to the set pressure Pression de réponse Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. and prevents air intake almost up to the set vacuum Set vacuum Internal negative gauge pressure at which a vacuum valve first opens. . The product vapors can be released through a collective line connected to the line flange on the pressure side. Backflow is not possible, i.e. the valve can be used as an overflow valve or backflow protection.
Full Lift Technology
The device Appareil 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. will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift Course Lift is the actual travel of the valve pallet from the main valve out of the closed position. . 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 Dépression Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. (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.
Advanced Manufacturing Technology
Due to our highly developed manufacturing technology, the tank pressure Pression de la cuve Tank pressure is the pressure within a tank. is maintained up to set pressure with a tightness that is far superior to the conventional standard. 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 Joint 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 Membrane 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 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 Clapet Valve pallet is the generic term for the assembly that rests on the valve seat. is a result of many years of research, resulting in stable operation of the valve pallet, optimized performance, and reduced product losses.
Tabela de dimensões
Para escolher o diâmetro nominal (DN), veja os diagramas de vazão nas páginas seguintes
| 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 | 480 | 600 | 805 | 925 | 1010 | 1010 |
| b | 390 | 485 | 550 | 660 | 780 | 875 | 875 |
| c | 150 | 180 | 200 | 250 | 300 | 305 | 305 |
| d | 240 | 300 | 330 | 390 | 480 | 555 | 582 |
| e | 165 | 192 | 240 | 350 | 390 | 460 | 460 |
| 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 | 445 | 565 | 770 | 895 | 1010 | 1010 |
| b | 400 | 485 | 550 | 655 | 775 | 875 | 885 |
| c | 140 | 143 | 165 | 216 | 267 | 305 | 305 |
| d | 255 | 308 | 355 | 417 | 505 | 582 | 603 |
| e | 165 | 192 | 240 | 350 | 390 | 460 | 460 |
Dimensões em mm
Dimensions of pressure or vacuum relief valves with heating jacket upon request
Seleção do material do corpo
| Design | C DN50/2”-80/3” | A DN100/4”-300/12” | D/B DN50/2”-300/12” |
| Housing | Stainless Steel | Steel | Stainless Steel |
| Housing attachment | Steel | Steel | Stainless Steel |
| Heating jacket(D/PA(L)-H-...) | Stainless Steel/Steel | Stahl | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel | Stainless Steel |
| Gasket | PTFE | PTFE | PTFE |
Os corpos também podem ser fornecidos com revestimento de ECTFE
Materiais especiais sob solicitação
Seleção de material do obturador da válvula
| 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 upon request
For higher set pressure or vacuum, refer to type D/PA(L)-F
Tipo de conexão flangeada
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
Outras conexões sob solicitação
Versão e especificação
Os obturadores de válvula são calibrados por peso. Para pressões de ajuste mais altas está disponível, sob solicitação, uma versão especial calibrada por mola. A versão (L) deve ser escolhida quando o bocal de conexão para o tubo coletor de escape é um diâmetro nominal maior que o diâmetro nominal do bocal do tanque.Estão disponíveis quatro versões:
Additional special devices available upon request
Ajustes de pressão
| Pressure or vacuum: | ±2.0 mbar | ±60 mbar |
| ±0.8 inch W.C. | ±24 inch W.C. |
Higher or lower settings upon request.For higher set pressure or vacuum refer to type D/PA(L)-F
Diagrama de vazão
Este diagrama de vazão foi determinado em uma bancada de medição de vazão calibrada e certificada pela TÜV. A vazão V em m³/h se refere ao estado técnico padrão de ar, conforme ISO 6358 (20°C, 1bar). Para conversão em outras densidades e temperaturas, veja o cap. 1: Bases técnicas.
