PM/(D)S
Pressure/Vacuum Relief Valve Pilot-operated diaphragm valve
Características
Función y descripción
Combined Pressure and Vacuum Relief Valve
The PM/(D)S Pilot-Operated PROTEGO® diaphragm valve is a highly developed valve for pressure and vacuum relief. It is primarily used as a device for out-breathing in tanks, containers, and process equipment. It provides protection against unallowable overpressure and prevents the intake of air and unallowable product vapor loss up to the set pressure. The valve can also be used as an in-breathing valve where the main valve is directly controlled when it is exposed to a vacuum, i.e., it functions as a weight-loaded diaphragm valve. It is ideally suitable for both atmospheric conditions and for use in low temperatures.
Corrosion-Resistant and Cryogenic Permanent Magnet
The main valve is controlled by a pilot valve. The pilot valve is controlled by the tank pressure. The tank substance does not continuously flow through the pilot. The set pressure is adjusted on the pilot valve by a corrosion-resistant and low-temperature resistant permanent magnet. As the operating pressure increases, the closing force at the main valve also increases; i.e., the valve tightness increases until the set pressure is reached to prevent leakage.
Advanced Manufacturing Technology
After the valve responds, it immediately opens completely without any significant increase in pressure (Pop-Open Characteristic), and the nominal volumetric flow is released through a fully open valve. If this is exceeded, the pressure increase follows the volume flow (Δp/V̇ curve). The tank pressure is maintained up to the set pressure with a tightness that is above the normal standards due to our state-of-the art manufacturing. This feature is ensured by valve seats made of high quality stainless steel with precisely lapped valve pallets. After the overpressure is released or the vacuum is balanced, the valve re-seats and provides a tight seal.
Dimensiones
To select the nominal size (DN), use the flow capacity charts on the following pages
| DN1 | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12 | 300 / 12" |
| DN2 | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" | 400 |
| a | 225 / 8.86 | 250 / 9.87 | 325 / 12.80 | 375 / 14.76 | 450 / 17.72 | 500 / 19.69 | 500 / 19.69 |
| b | 150 / 5.91 | 175 / 6.89 | 225 / 8.86 | 250 / 9.84 | 270 / 10.63 | 300 / 11.81 | 325 / 12.79 |
| c | 275 / 10.83 | 330 / 12.99 | 445 / 17.52 | 550 / 21.65 | 665 / 26.18 | 785 / 30.91 | 785 / 30.91 |
| d | 370 / 14.57 | 425 / 16.73 | 530 / 20.87 | 605 / 23.82 | 675 / 26.57 | 785 / 30.91 | 835 / 32.87 |
| e | 615 / 24.21 | 685 / 26.97 | 770 / 30.31 | 825 / 32.48 | 935 / 36.81 | 1005 / 39.57 | 1055 / 41.53 |
| f | 35 / 1.38 | 40 / 1.57 | 40 / 1.57 | 50 / 1.97 | 50 / 1.97 | 50 / 1.97 | 50 / 1.97 |
| g | 160 / 6.30 | 195 / 7.68 | 250 / 9.84 | 315 / 12.40 | 370 / 14.57 | 425 / 16.73 | 425 / 16.73 |
Dimensiones en mm / pulgadas
Selección de materiales para la vivienda
| Design | A | B |
| Housing | Aluminium | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel |
| Sealing | KL-C-4106 | KL-C-4106 |
| Main diaphragm protection | Stainless Steel | Stainless Steel |
| Pilot lines | Stainless Steel | Stainless Steel |
| Pilot housing | Stainless Steel | Stainless Steel |
| Pilot diaphragm | FEP | FEP |
Special materials upon request
Material selection for valve pallet
| Design | A | B | C |
| Pressure range [mbar] [inch W.C.] | -3,0 up to -4* -1.2 up to -1.6* | -4,0 up to -5,0* -1.6 upm to -2.0* | -5,0 up to -7,0* -2.0 up to -2,8* |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel |
| Diaphragm | FEP | FEP | FEP |
| Diaphragm pallet | Aluminium | Aluminium | Stainless Steel |
* The indicated vacuum ranges depend on the nominal size and can differ. The pressure Setting can be combined with any vacuum setting
Special materials 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 is equipped with either a control pilot valve or with one control and emergency pilot valve to ensure optimum operating safety in case of malfunctions or damage.Two different designs are therefore available:
Additional special devices available upon request.
Settings
| Pressure: | +10 mbar | +300 mbar |
| +4 inch W.C. | +120 inch W.C. | |
| Vacuum: | -3.0 mbar | -7 mbar |
| -1.2 inch W.C. | -2.8 inch W.C. |
Higher or 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”.
