UB/DF
Pressure Diaphragm Valve deflagration- and endurance burning-proof
Features
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
Monitorización digital de nivel
Monitorización digital de nivel disponible para optimizar los intervalos de mantenimiento
Sensores digitales de nivel
Los sensores digitales de nivel pueden montarse posteriormente en válvulas ya instaladas
Venteo seguro
Venteo y ventilación de apagallamas de la cámara presurizada
A prueba de heladas
Protección óptima contra heladas
Drenaje de condensados
Drenaje de condensados automático
Monitorización
Supervisión del líquido de carga mediante indicador de nivel
Diseño modular
Permite la sustitución y limpieza de los discos de filtro FLAMEFILTER® de forma individual
Apto para aplicaciones exigentes
Especialmente adecuado para productos problemáticos como estireno, acrilatos, etc.
Monitorización sencilla del funcionamiento
y mantenimiento mediante la simple apertura de la tapa de válvula abatible
Sistema de protección conforme a ATEX
Puede utilizarse como sistema de protección en zonas con atmósferas potencialmente explosivas según ATEX
Seguridad contracombustión prolongada
Protección contra deflagraciones atmosféricas y combustión prolongada
Function and Description
Highly Developed Pressure Relief Valve
The PROTEGO® UB/DF diaphragm valve is a worldwide unique deflagration-proof and endurance burning-proof pressure relief valve combining the function of a dynamic and static Flame Arrester. It is primarily used as a device for flame transmission-proof out-breathing on tanks, containers, and process equipment. The valve offers reliable protection against overpressure, prevents the in-breathing of air and product losses almost up to the set pressure, and protects against atmospheric deflagration and endurance burning if stabilized burning occurs.
For Explosion Group IIB3
The PROTEGO® UB/DF diaphragm valve has proven itself over many years under a wide variety of operating conditions in the mineral oil and chemical industries. The set pressure is adjusted with a freeze resistant water-glycol mixture which ensures safe operation under extreme cold weather conditions. The PROTEGO® UB/DF valve is available for substances from explosion group IIB3 (NEC group C MESG ≥ 0.65 mm).
Operation of the Overpressure Relief Valves
When the pressure in the tank reaches the set pressure, the diaphragm (1) on the outer valve seat ring (2) is lifted and vapors are released into the environment. The set pressure is adjusted by the weight of the liquid load (water-glycol mixture) in the outer ring chamber (3). The overpressure chamber is equipped with an opening (4) to keep the pressure in balance. The opening is equipped with a FLAMEFILTER® to prevent flame transmission into the overpressure chamber. The overpressure setting is determined by the filling level of the loading liquid and can be adjusted by a floating level indicator (5).
Overpressure Protection with Advanced Sealing Technology
The tank pressure is maintained up to the set pressure with a tightness that is above the normal standards due to our highly developed manufacturing technology. This is achieved by the liquid loaded diaphragm pressing tightly around the special designed valve seat surface area even when the operating pressure increases, which reduces surface pressure and unnecessary leakage. After the overpressure is released, the valve re-seats and provides a tight seal.
Dynamic Flame Arresting at Overpressure Conditions
If the set pressure is exceeded, explosive gas/product vapor/air mixtures are released into the atmosphere. The speed at which these mixtures exit the annular gap between the diaphragm and the outer valve seat ring is considerably greater than the flame speed. If this mixture ignites, flashback into the tank is prevented. If the mixture flow continues, the dynamic flame arresting feature prevents flashback, even in the case of endurance burning.
Main Component – PROTEGO® Flame Arrester Unit
Even at relatively low flow rates, e.g., during thermal out-breathing, the gap formed by the volumetric flow is so narrow, that flames in the gap are extinguished, and a flashback is prevented. At very low pressure settings, the explosion pressures resulting from an atmospheric deflagration may be strong enough to lift the diaphragm off the valve seat rings. The ignition into the tank can be prevented by installing the PROTEGO® Flame Arrester Unit (8). This PROTEGO® Flame Arrester Unit provides additional protection against atmospheric deflagration when the valve is open for maintenance and inspection.
Many Individual Certifications
The valve can be used at an operating temperature of up to +60°C/140°F and meets the requirements of European Tank Design Standard EN 14015 (Appendix L) and ISO 28300 (API 2000).
EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data
Dimensiones
To select the nominal size (DN), please use the flow capacity charts on the following pages
| DN | pressure | pressure | 80 / 3" | pressure | pressure | 100 / 4" | pressure | pressure | 150 / 6" |
| a | up to +28 mbar | up to +11.2 inch W.C. | 615 / 24.21 | up to +28 mbar | up to +11.2 inch W.C. | 645 / 25.39 | up to +25 mbar | up to +10 inch W.C. | 680 / 26.77 |
| a | > +28 mbar | > +11.2 inch W.C. | 765 / 30.12 | > +28 mbar | > +11.2 inch W.C. | 795 / 31.30 | > +25 mbar | > +10 inch W.C. | 830 / 32.68 |
| b | 410 / 16.14 | 485 / 19.09 | 590 / 23.23 |
Dimensiones en mm / pulgadas
Pressure settings > +50 mbar / +20 inch W.C. (DN 80/3”), > +45 mbar / +18 inch W.C. (DN 100/4”), > +46 mbar / +18.4 inch W.C. (DN150/6”) with additional liquid reservoir - dimensions upon request
Dimensions for pressure diaphragm valves with heating coil upon request
Selección del grupo de explosión
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| ≥ 0,65 mm | IIB3 | C |
Special approvals upon request
Selección de materiales para la vivienda
| Design | B | C | D |
| Housing | Cast Iron | Steel | Stainless Steel |
| Valve top | Stainless Steel | Stainless Steel | Stainless Steel |
| Heating coil (UB / DF-H-...) | Stainless Steel | Stainless Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel | Stainless Steel |
| Gasket | FPM | FPM | PTFE |
| Diaphragm | A, B | A, B | A, B |
| Flame arrester unit | A | C | C |
Option: Housing with ECTFE-lining
Special materials upon request
Selección de materiales
| Design | A | B |
| Diaphragm | FPM | FEP |
Special materials upon request
Combinación de materiales para la unidad apagallamas
| Design | A | C |
| FLAMEFILTER® cage | Cast Iron | Stainless Steel |
| FLAMEFILTER® | Stainless Steel | Stainless Steel |
| Spacer | Stainless Steel | Stainless Steel |
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
Diagrama de flujo volumétrico
UB/DF DN100 Pressure
UB/DF DN150 Pressure
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”.
