DE-S-IIC
High Velocity Pressure Relief Valve deflagration- and endurance burning-proof
Características
Función y descripción
High-Speed Pressure Relief Valve
The Deflagration-Proof and Endurance-Burning-Proof PROTEGO® DE-S type 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. is a state of the art high velocity vent valve working on the principle of a dynamic Flame Arrester. It is primarily used as a device for flame transmission proof venting of cargo spaces and loading systems of tankships during the loading process and on the journey. The valve offers reliable protection against excess pressure, prevents product losses almost 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. and provides protection against atmospheric deflagrations as well as endurance burning Endurance burning Stabilized burning for an unlimited time. if stabilized burning occurs. The PROTEGO® DE-S high velocity vent valve is available for substances of explosion group IIC (NEC group B MESG < 0,50 mm).
Jump Characteristic
The valve cone (1) is kept in a closed position by a corrosion resistant permanent magnet (2). The set pressure is adjusted by the distance of the permanent magnet to its counterpart (3). Upon reaching the set pressure, the valve opens directly to a full lift Course Lift is the actual travel of the valve pallet from the main valve out of the closed position. with only a minor pressure rise (jump characteristic). The et pressure is therefore very close to the maximum allowable working pressure (MAWP) of the cargo space.
Advanced Manufacturing Technology
The tank pressure Pression de la cuve Tank pressure is the pressure within a tank. is maintained up to the set pressure with a tightness that is far superior to the conventional standard due to our state of the art manufacturing technology. This feature is ensured by valve seats made of high-quality stainless steel with an individually lapped valve cone. After the excess pressure is discharged, the valve reseats 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. . The design of the valve cone and valve seat Siège de soupape The valve seat is a component on which the valve pallet rests when the valve is closed. produces a vertical, free jet that transports the gases far away from the discharge opening. This keeps the deck free of gas.
Safety of the High-Speed Pressure Relief Valve
This keeps the deck free of gas. The shape of the valve cone and valve seat promotes the drainage of rainwater when closed. A function check of the valve is easily performed with a manual lift gear (4) which returns to its initial position after actuation. A lateral flange connection, DN2, is standard for a vacuum Dépression Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. valve (such as the PROTEGO® SV/E-S, see volume 7). If the set pressure is exceeded, explosive gas/product-vapour air mixtures are released to the atmosphere. When reaching the adjusted set pressure Pression de tarage Adjusted set pressure is the pressure at which a valve opens on a test bench. , the velocity at which the mixtures exit the valve cone gap (5) (the gap between the valve seat and the valve cone) is much higher than the flame velocity.
Prevention of Flame Flashback
If this mixture ignites, flashback into the tank is prevented. If the mixture flow continues, the dynamic flame arresting feature prevents flashback ignition even in the case of endurance burning. As the system pressure decreases, the discharge velocity at the valve cone gap decreases also. The design ensures, that even in the closing pressure range, the valve cone closes in a timely manner keeping the discharge velocity far above the flame velocity and thereby preventing flashback.
Tested Against Oscillating Flow
The PROTEGO® DE-S-IIC high velocity pressure relief valve Soupape de surpression Valve designed to open and relieve excess pressure and to reclose and prevent the further flow of fluid after normal conditions have been restored. is also approved for oscillating flow. A pipe of length no longer than the maximum tested length may be installed between the cargo space and the valve.The design is therefore a function of the required flow capacity. The design for explosion group IIC (NEC group B) is only available with a lift of 10 mm. The maximum pipe length between the valve and the tank must be observed: DN 80/3" and 100/4" = 5 m / 16.404 ft DN 125/5" and 150/6" =7 m / 22.965 ft
Many Individual Certifications
The valve can be used at an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. up to +60°C / 140°°F; since the valve is approved for group IIC (NEC group B MESG < 0,50 mm) vapours, it also meets the requirements of European Marine Equipment Directive (MED). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Dimensiones
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), please use the flow capacity chart on the following page
| DE-S-IIC with closed lateral connection DN 2 | ||||
| DN 1 | 80 / 3" | 100 / 4" | 150 / 6" | |
| a | 515 / 20.28 | 515 / 20.28 | 515 / 20.28 | |
| b | 195 / 7.68 | 195 / 7.68 | 195 / 7.68 | |
| c | 220 / 8.66 | 220 / 8.66 | 220 / 8.66 | |
| d | 120 / 4.72 | 120 / 4.72 | 120 / 4.72 | |
| e1 | 145 / 5.71 | 145 / 5.71 | 145 / 5.71 | |
| DE-S-IIC with lateral connection for vacuum relief valve Soupape de dépression A vacuum relief valve is used to ventilate a part of the system and protects it from impermissible underpressure. DN 2 | ||||
| DN 1 | 80 / 3" | 100 / 4" | 150 / 6" | 150 / 6" |
| DN 2 | 80 / 3" | 80 / 3" | 80 / 3" | 150 / 6" |
| a | 515 / 20.28 | 515 / 20.28 | 515 / 20.28 | 515 / 20.28 |
| b | 195 / 7.68 | 195 / 7.68 | 195 / 7.68 | 195 / 7.68 |
| c | 220 / 8.66 | 220 / 8.66 | 220 / 8.66 | 220 / 8.66 |
| d | 120 / 4.72 | 120 / 4.72 | 120 / 4.72 | 120 / 4.72 |
| e2 | 100 / 3.94 | 100 / 3.94 | 100 / 3.94 | 100 / 3.94 |
Dimensiones en mm / pulgadas
The maximum pipe length between the valve and the tank must be observed:
DN 80/3" and 100/4" = 5 m / 16.404 ft
DN 125/5" and 150/6" =7 m / 22.965 ft
Selección de materiales
| Design | A | B | C |
| Housing | Steel | Stainless Steel | Hastelloy |
| Valve seat | Stainless Steel | Stainless Steel | Hastelloy |
| Valve cone | Stainless Steel | Stainless Steel | Hastelloy |
| Bellow | PTFE | PTFE | PTFE |
| Gasket | PTFE | PTFE | PTFE |
Special materials upon request
Selección del grupo de explosión
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| < 0,50 mm | IIC | B |
Special approvals 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
There are two different designs* additional DN 2 information
Additional special designs upon request
Settings
| +60 mbar | +350 mbar | |
| +24 inch W.C. | +140 inch W.C. |
Higher or lower pressure 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”.
