DA-SB-PTFE
In-Line Detonation Flame Arrester for stable detonations and deflagrations in a straight through design with shock absorber, bidirectional
Características
Função e descrição
High-Tech Coating of the Housing
The In-Line Detonation Detonation Explosion propagating at supersonic velocity and characterized by a shock wave. Flame Arresters Flame arrester Device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but prevent the transmission of a flame. Type PROTEGO® DA-SB-PTFE are the latest generation of Flame Arresters and are distinguished by its unique resistance to adhesive and corrosive media. The use of fluoroplastics as a high-tech 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. coating Coating Coating is the application of a firmly adhering layer of shapeless material to the surface of a workpiece. and as solid material for the Flame Arrester element is unique throughout the world. The speed of incoming detonations is highly reduced by the effective shock absorber Shock absorber A shock absorber is a device that reduces the kinetic energy of a detonation. (1) and result in an equal pressure Pressure (gauge pressure) Pressure for which the value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure. distribution across the FLAMEFILTER® surface. This improves the flame extinction in the narrow gaps of the original PTFEFLAMEFILTER® (3).
Main Component – PROTEGO® Flame Arrester Unit
The devices are symmetrical and offer bidirectional flame arresting for deflagrations and stable detonations. The arrester essentially consists of two coated housing parts (4), two coated shock absorbers and the PROTEGO® Flame Arrester Unit PROTEGO® flame arrester unit The PROTEGO® flame arrester unit is the main component of a flame arrester. It prevents flame propagation. (2) in the center. The PROTEGO® Flame Arrester Unit is modular and consists of several FLAMEFILTER® discs and spacers firmly held in a FLAMEFILTER® cage FLAMEFILTER® cage The FLAMEFILTER® cage is a housing for a FLAMEFILTER® set. . The number of FLAMEFILTER® discs and their gap size depends on the arrester‘s conditions of use.
For Explosion Group IIA
The Detonation Arrester PROTEGO® DA-SB-PTFE can be used for explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group IIA (NFPA group D). The standard design is approved at an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. up to +60°C / 140°F. The maximum allowable operating pressure Operating pressure Operating pressure is the pressure existing at normal operating conditions within the system being protected. depends on nominal diameter (DN) and 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. (NG) and amounts to a maximum of 2.4 bar / 34.8 psi absolute (for DN50 / 2” see table 3). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Tabela de dimensões
Para selecionar a combinação dos tamanhos nominais/diâmetros nominais (NG/DN), utilize os diagramas de vazão nas páginas seguintes
| NG | 150 / 6" | 150 / 6" | 200 / 8" | 300 / 12" |
| DN | 50 / 2" | 80 / 3" | 80 / 3" | 100 / 4" |
| a | 287 | 287 | 342 | 447 |
| b | 407 | 407 | 497 | 645 |
| c | 400 | 400 | 530 | 530 |
Dimensões em mm
Material for housing
| Versão | A |
| Corpo | Aço |
| Absorvedor de choque | Aço |
| Vedação | PTFE |
| Conjunto abafador de chamas | A, B, C |
Materiais especiais sob solicitação
Combinações de material do conjunto abafador de chamas
| Design | A | B | C |
| FLAMEFILTER® cage | Steel with an ECTFE coating | Hastelloy | Stainless Steel |
| Spider rings | Steel with an ECTFE coating | Hastelloy | Stainless Steel |
| FLAMEFILTER®* | PTFE* | PTFE* | PTFE* |
| Spacer Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® set. | PEEK / ETFE / FEP | PEEK / ETFE / FEP | PEEK / ETFE / FEP |
* electrically conductive
Special materials upon request
Seleção do grupo de explosão
| MESG | Gr. expl. (IEC / CEN) | Grupo gás (NEC) |
| > 0,90 mm | IIA | D |
Aprovações especiais sob solicitação
Seleção da pressão máx. de trabalho
| NG | 150 / 6" | 150 / 6" | 200 / 8" | 300 / 12" |
| DN | 50 / 2" | 80 / 3" | 80 / 3" | 100 / 4" |
| Pmax | 2,4 | 1,1 | 1,2 | 1,2 |
Pmáx. = pressão de trabalho máxima admissível em bar absoluta, pressão de trabalho mais elevada sob solicitação
Indicação da temperatura máx. de trabalho
| ≤ 60°C / 140°F | Ttemperatura máxima de trabalho admissível em °C |
| - | Designation |
temperaturas de trabalho mais elevadas, sob solicitação
Tipo de conexão flangeada
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
Outras conexões sob solicitação
Versão e especificação
Estão disponíveis três versões:Outros dispositivos especiais sob solicitação
*Termoresistência para grupo de equipamentos II, categoria (1) 2 (cat. GII (1) 2)
Diagrama de vazão
Este diagrama de vazão foi determinado em uma bancada de medição de vazão calibrada e certificada pela TÜV. A vazão V em m³/h se refere ao estado técnico padrão de ar, conforme ISO 6358 (20°C, 1bar). Para conversão em outras densidades e temperaturas, veja o cap. 1: Bases técnicas.
