UB/VF
Vacuum Diaphragm Valve deflagration-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
Drenaje de condensados
Drenaje de condensados automático
Monitorización
Supervisión del líquido de carga mediante indicador de nivel
Monitorización sencilla del funcionamiento
y mantenimiento mediante la simple apertura de la tapa de válvula abatible
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.
Sistema de protección conforme a ATEX
Puede utilizarse como sistema de protección en zonas con atmósferas potencialmente explosivas según ATEX
A prueba de heladas
Protección óptima contra heladas
Function and Description
Highly Developed Vacuum Relief Valve
The PROTEGO® UB/VF diaphragm valve is a worldwide unique vacuum relief valve combining the function of a dynamic and static Flame Arrester. It is primarily used as a device for flame transmission-proof in-breathing on tanks, containers, and process equipment. The valve offers reliable protection against vacuum build up, prevents the in-breathing of air and product losses almost up to the set vacuum, and protects against atmospheric deflagration.
High Operational Reliability in Extreme Conditions
The PROTEGO® UB/VF diaphragm valve has proven itself over many years under a wide variety of operating conditions in the mineral oil and chemical industries. Worldwide, it is the only vent which works reliably with problem products such as styrene or acrylates. The set vacuum is adjusted with a freeze resistant water-glycol mixture which ensures safe operation under extreme cold weather conditions. The PROTEGO® UB/VF valve is available for substances from explosion group IIB3.
Composition
If a vacuum builds up in the tank, it is transmitted through pressure balancing tubes into the vacuum chambers (1), (2), which are connected to each other. This will remove the weight of the load liquid, and the atmospheric pressure will lift the diaphragm (3) off the inner and outer valve seat rings (4, 5), resulting in ventilation of the tank. The vacuum setting is adjusted via the filling level of the load liquid and can be checked by a floating level indicator (6).
Advanced Manufacturing Technology
The tank vacuum is maintained up to the set vacuum 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 vacuum increases, which reduces surface pressure and unnecessary leakage. After the vacuum is balanced, the valve re-seats and provides a tight seal.
Main Component – PROTEGO® Flame Arrester Unit
At very low vacuum 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 (7). This PROTEGO® Flame Arrester Unit provides additional protection against atmospheric deflagration when the valve is open for maintenance and inspection. 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 | vacuum | vacuum | 80 / 3" | vacuum | vacuum | 100 / 4" | 150 / 6" |
| a | up to -28 mbar | up to -11.2 inch W.C. | 615 / 24.21 | up to -22 mbar | up to -8.8 inch W.C. | 645 / 25.39 | 680 / 26.77 |
| a | < -28 mbar | < -11.2 inch W.C. | 765 / 31.12 | < -22 mbar | < -8.8 inch W.C. | 795 / 31.30 | 830 / 32.68 |
| b | 410 / 16.14 | 485 / 19.09 | 590 / 23.23 |
Dimensiones en mm / pulgadas
Dimensions for vacuum diaphragm valve 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 | C | D |
| Housing | Cast Iron | Stainless Steel |
| Valve top | Stainless Steel | Stainless Steel |
| Heating coil (UB / VF-H-...) | Stainless Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel |
| Gasket | FPM | PTFE |
| Diaphragm | A, B | A, B |
| Flame arrester unit | A | 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 | C |
| FLAMEFILTER® cage | Stainless Steel |
| FLAMEFILTER® | Stainless Steel |
| Spacer | 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/VF DN100 Vacuum
UB/VF DN150 Vacuum
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”.
