PM/(D)S
Pressure/Vacuum Relief Valve Pilot-operated diaphragm valve
Features
Function and Description
Combined Pressure and Vacuum Relief Valve
The PM/(D)S Pilot-Operated PROTEGO® diaphragm Membrane A diaphragm is a thin layer of material, which has a large surface area. valve is a highly developed valve for pressure and vacuum Dépression Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. relief. It is primarily used as a 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. for out-breathing in tanks, containers, and process equipment. It provides protection against unallowable overpressure Surpression Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and prevents the intake of air and unallowable product vapor loss 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. . 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 Soupape pilote The pilot valve is an assembly of a pilot operated valve, which is mounted on the main valve and is used to control the main valve. . The pilot valve is controlled by the tank pressure Pression de la cuve Tank pressure is the pressure within a tank. . 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 Pression de service Operating pressure is the pressure existing at normal operating conditions within the system being protected. 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 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. .
Dimensions
To select the nominal size Diamètre nominal The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (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 |
Dimensions in mm / inches
Material selection for housing
| 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 Corps A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. | 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
Flange connection type
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other types upon request
Design Types and Specifications
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.
Flow Capacity Chart
The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”.
