DR/SV
In-Line Detonation Flame Arrester with shut-off valve, for stable detonations and deflagrations in a straight through design, unidirectional
Features
Function and Description
Detonation Arrester With the Advantages of a Shut-Off Valve
The PROTEGO® DR/SV Flame Arrester 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. Series ideally combines the function of a detonation arrester Detonation flame arrester Flame arrester designed to prevent the transmission of a detonation. with the advantages of a Shut-Off Valve. In case of ignition, the fire can be stabilized within the Flame Arrester when the flammable gas continues to flow. Inside the detonation arrester, is a valve (1) that closes in case of fire, stops the additional supply of fuel and extinguishes the flames.
Suction-Side Protection for Compressors and Pumps
Temperature sensors in combination with an emergency switch off do not have to be installed if the type PROTEGO® DR/SV device Device 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 used. This device is particularly useful for the sucction-side protection of compressors and pumps.
For Explosion Group IIA
Once a detonation Detonation Explosion propagating at supersonic velocity and characterized by a shock wave. enters the Flame Arrester, energy is absorbed from the detonation shock wave by the central plate disc (2) before the flame is extinguished in the narrow gaps of the two FLAMEFILTER® discs (3). This device can be used for fluids of explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group IIA (NEC group D). The In-Line Detonation Flame Arresters are unidirectional and equipped with a threaded connection. The thread can be executed to international standards. The standard design can be used up to an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of +60°C / 140°F and an (absolute) operating pressure Operating pressure Operating pressure is the pressure existing at normal operating conditions within the system being protected. up to 1.1 bar / 15,9 psi. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Dimensions
To select the 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. (DN), please use the flow capacity chart on the following page
| DN | G ½" | G ¾" |
| a | 115 / 4.53 | 115 / 4.53 |
| b | 100 / 3.94 | 100 / 3.94 |
Dimensions in mm / inches
Material selection for housing
Special materials upon request
Material combinations of flame arrester unit
| Design | A | B |
| FLAMEFILTER®* | Stainless Steel | Stainless Steel |
| Spacer Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® set. | Stainless Steel | Stainless Steel |
| Support for FLAMEFILTER® | Brass | Stainless Steel |
| Washer | Brass | Stainless Steel |
* the FLAMEFILTER® are also available in the materials Tantalum, Inconel, Copper, etc. when the listed housing and cage materials are used.
Special materials upon request
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| > 0,90 mm | IIA | D |
Special approvals upon request
Selection of max. operating pressure
| DN | G ½" | G ¾" |
| Pmax | 1,1 / 15.9 | 1,1 / 15.9 |
Pmax = Maximum allowable operating pressure in bar / psi absolut, higher operating pressure upon request
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
| - | Designation |
higher operating temperatures upon request
Type of connection
| Pipe thread DIN ISO 228-1 | DIN |
other types of thread 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”.
