Caractéristiques
Fonction et description
Main Component – PROTEGO® Flame Arrester Unit
The Deflagration-Proof SV/E Type PROTEGO® valve is a state-of-the-art 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. with an integrated Flame Arrester Unit. 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 flame transmission-proof Flame transmission-proof Characteristic of a device to avoid flashback. in-breathing on tanks, containers, and process equipment. The valve offers reliable protection against vacuum Dépression Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. and prevents in-breathing of air 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. ; while at the same time protecting against atmospheric deflagration. The PROTEGO® Flame Arrester Unit is designed to achieve minimum pressure drop with maximum safety. The PROTEGO® SV/E valve is available for substances from explosion groups IIA to IIC.
10%-Technology
When the set vacuum Set vacuum Internal negative gauge pressure at which a vacuum valve first opens. is reached, the valve starts to open and reaches full lift Course Lift is the actual travel of the valve pallet from the main valve out of the closed position. within 10% overpressure Surpression Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. . This unique 10% technology enables a set vacuum that is only 10% above the maximum allowable working vacuum (MAWV) of the tank. After years of development, this typical opening characteristic of a safety relief valve is now also available for the low pressure range.
Custom Materials
The tank pressure Pression de la cuve Tank pressure is the pressure within a tank. is maintained up to the set vacuum with a tightness that is above the normal standards due to our state-of-the-art manufacturing technology. This feature is ensured by the valve seats made of high quality stainless steel and with individually lapped valve pallets (1), or with an air cushion 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. , (2) in conjunction with high quality FEP diaphragm Membrane A diaphragm is a thin layer of material, which has a large surface area. . The valve pallets are also available with a PTFE seal to prevent them from sticking when sticky substances are used and to enable the use corrosive fluids. After the vacuum is balanced, the valve re-seats and provides a tight seal.
Prevents Ignition Through Integrated FLAMEFILTER®
If the valve is used in atmospheres forming an explosive mixture with air and the mixture ignites, the integrated PROTEGO® Flame Arrester Unit (3) prevents flame transmission into the tank. The standard design is tested at an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. 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). In addition, numerous versions for higher operating temperature are available.
Many Individual Certifications
EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request. Additional certificates from classification organizations for use on ships are also available.
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), please use the flow capacity chart on the following page
| DN | 50 / 2'' | 80 / 3'' | 100 / 4" | 150 / 6'' | 200 / 8'' | 250 / 10'' | 300 / 12'' |
| a | 140 / 5.51 | 170 / 6.69 | 190 / 7.48 | 230 / 9.06 | 300 / 11.81 | 325 / 12.80 | 425 / 16.73 |
| b | 105 / 4.13 | 115 / 4.53 | 125 / 4.92 | 165 / 6.50 | 195 / 7.68 | 230 / 9.06 | 280 / 11.02 |
| c | 225 / 8.86 | 240 / 9.45 | 320 / 12.60 | 410 / 16.14 | 460 / 18.11 | 525 / 20.67 | 575 / 22.64 |
| d | 170 / 6.69 | 235 / 9.25 | 280 / 11.02 | 335 / 13.19 | 445 / 17.52 | 505 / 19.88 | 505 / 19.88 |
| e | 215 / 8.46 | 215 / 8.46 | 255 / 10.04 | 345 / 13.58 | 435 / 17.13 | 470 / 18.50 | 635 / 25.00 |
Dimensions in mm / inches
Material selection for housing
| Design | B | C | |
| Housing | Steel | Stainless Steel | |
| Heating jacket (SV / E-(S)-H-...) | Steel | Stainless Steel | |
| Valve seat | Stainless Steel | Stainless Steel | |
| Gasket | PTFE | PTFE | |
| Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. | B | B |
Special materials upon request
Material combinations of flame arrester unit
| Design | B | |
| FLAMEFILTER® cage | Stainless Steel | |
| Stainless Steel |
Special materials upon request
Material selection for valve pallet
| Design | A | B | C | D | E | F |
| Vacuum range [mbar] [inch W.C.] | -2.0 up to -3.5 -0.8 up to -1.4 | <-3.5 up to -14 <-1.4 up to -5.6 | <-14 up to -35 <-5.6 up to -14 | <-35 up to -60 <-14 up to -24 | <-14 up to -35 <-5.6 up to -14 | <-35 up to -60 <-14 up to -24 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal | Metal to Metal | PTFE | PTFE |
Special materials and higher pressure settings upon request
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| ≥ 0,65 mm | IIB3 | C |
| ≥ 0,50 mm | IIB | B |
| < 0,50 mm | IIC | B |
Special approvals upon request
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
| - | Designation |
higher operating temperatures 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 disc is weight-loaded. Higher vacuum can be achieved upon request with a special spring Ressort A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. loaded design.There are four different designs:
Additional special devices available upon request
Settings
| Vacuum: | -2.0 mbar | -60 mbar |
| -0.8 inch W.C. | -24 inch W.C. |
Higher vacuum 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”.
