PV/ELR
Pressure and Vacuum Relief Valve
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
Presión de tarado próxima a la presión de apertura para un mantenimiento óptimo de la presión en el sistema
Flujo volumétrico
Flujo de caudal optimizado
Plato de válvula guiado
El plato de válvula va guiado dentro del cuerpo para protegerlo frente a condiciones meteorológicas adversas
Se usa en zonas con riesgo de explosión
Puede utilizarse en zonas con riesgo de explosión
Drenaje de condensados
Drenaje de condensados automático
Diseño compacto
Facilita la instalación cerca de suelos y paredes
Function and Description
Combined Pressure and Vacuum Relief Valve
The PV/ELR Type PROTEGO® valve is a highly developed combined 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 air intake almost up to the set vacuum.
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.
Advanced Manufacturing Technology
Due to the highly developed manufacturing technology, the tank pressure is maintained up to the set pressure, with a tightness that is far superior to the conventional standard. This feature is 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 pallet from sticking when sticky products are used, and they enable the use of corrosive substances. After the overpressure is released or the vacuum is balanced, the valve re-seats 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 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 chart on the following page
| DN | 80 / 3" | 80 / 3" | 100 / 4" | 100 / 4" |
| Set pressure | ≤ +35 mbar | > +35 mbar | ≤ +35 mbar | > +35 mbar |
| Set pressure | ≤ +14 inch W.C. | > +14 inch W.C. | ≤ +14 inch W.C. | > +14 inch W.C. |
| a | 345 / 13.58 | 475 / 18.70 | 345 / 13.58 | 475 / 18.70 |
| b | 146 / 5.75 | 146 / 5.75 | 146 / 5.75 | 146 / 5.75 |
| c | 218 / 8.58 | 218 / 8.58 | 218 / 8.58 | 218 / 8.58 |
| d | 353 / 13.90 | 353 / 13.90 | 353 / 13.90 | 353 / 13.90 |
Dimensiones en mm / pulgadas
Dimensions for pressure/ vacuum relief valve with heating jacket upon request
Selección de materiales para la vivienda
| Design | B | C |
| Housing | Steel | Stainless Steel |
| Heating jacket (PV / ELR-H-...) | Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel |
| Weather hood | Steel | Stainless Steel |
| Protective mesh screen | 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.] | +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 +210 >+5.6 up to +84 | >+14 up to +210 >+5.6 up to +84 |
| 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 |
| 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 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”.
Detail X
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