DZ/EA
Pressure or Vacuum Relief Valve, In-Line With ETFE Lining
Características
Función y descripción
Highly Developed Pressure or Vacuum Relief Valve
The lined PROTEGO® In-Line Valve DZ/EA is a state-of-the-art Pressure or Vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. Relief Valve in a right angle design. The lining Lining Protective plastic lining with a defined minimum/maximum thickness to protect against aggressive mixtures (e.g., acid). makes this model a perfect solution for corrosive, polymerizing, or sticky substances. All internal parts are manufactured from PTFE or other highly corrosion resistant materials. Typically, the valve is installed in the in-breathing or out-breathing lines of tanks, vessels, and process equipment Equipment Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion. to protect against unallowable overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. or underpressure. The valve prevents emission losses almost up to the set pressure Set pressure 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 unacceptable product Product Includes equipment, protective systems, devices, components and combinations of these. entry.
Full Lift Technology
The device Device 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 Lift 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 Pressure (gauge pressure) Pressure for which the value is equal to the algebraic difference between the absolute pressure and the atmospheric 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 Maximum allowable working pressure (MAWP) Maximum gauge pressure permissible at the top of a completed vessel in its normal operating position at the designated coincident temperature specified for that pressure. or MAWV) of the tank and still safely vent the required mass flow.
Advanced Manufacturing Technology
The opening characteristic is the same for pressure and vacuum relief. Due to our highly developed manufacturing technology, the tank pressure Tank pressure Tank pressure is the pressure within a tank. is maintained up to the set pressure with a tightness that is far above to the conventional standard. This feature is ensured by specially finished PTFE valve seats, or by the use of Hastelloy valve seats, and with individually lapped valve pallets (1). After the overpressure is released or the vacuum is balances, the valve re-seats and provides a tight seal Seal 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. . The optimized fluid dynamic design of the valve body and valve pallet Valve pallet 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.
Dimensiones
To select the nominal size Nominal size 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), please use the flow capacity chart on the following page
| DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" |
| a | 168 / 6.61 | 180 / 7.09 | 200 / 7.87 | 228 / 8.98 |
| b | 167 / 6.57 | 177 / 6.97 | 200 / 7.87 | 232 / 19.13 |
| c | 330 / 12.99 | 390 / 15.35 | 445 / 17.52 | 485 / 19.09 |
| d | 200 / 7.87 | 240 / 9.45 | 280 / 11.02 | 335 / 13.19 |
Dimensiones en mm / pulgadas
Selección de materiales para la vivienda
| Design | C | D |
| Housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. | Steel | Steel |
| Lining | ETFE | ETFE |
| Cover | Steel | Steel |
| Valve seat Valve seat The valve seat is a component on which the valve pallet rests when the valve is closed. | PTFE | Hastelloy |
| Valve pallet | A | A,B |
Semi-conductive material and special material (e.g PFA) upon request
Special materials upon request
Material selection for valve pallet
| Design | A | B |
| Pressure range [mbar] [inch W.C.] | ±5 up to ±50 ±2 up to ±20 | ±5 up to ±50 ±2 up to ±20 |
| Valve pallet | PTFE | Hastelloy |
| Sealing | PTFE | Metal to Metal |
Special materials upon request
For higher set pressure or vacuum refer to type DZ/EA-F.
Tipo de bridas de conexión
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other connections upon request
Modelo y especificación
The valve pallet is weight loaded. Higher set pressures for pressure and vacuum are achieved by using spring Spring A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. loaded type DZ/EA-F.Additional special devices available upon request
Within piping systems the influence of backpressure has to be considered in deciding the set pressure and opening characteristics. For special design solutions (e.g. partial load operation) the valve can be supplied with standard valve pallets (with proportional opening function).
Settings
| Pressure or vacuum settings: | ±5.0 mbar | ±50 mbar |
| ±2.0 inch W.C. | ±20 inch W.C. |
For higher set pressure or vacuum refer to type DZ/EA-F
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”.
