DR/ES-V

Function and Description

PROTEGO^® DR/ES-V series uniquely combines the function of an in-line detonation flame arrester with the function of a pressure relief valve in one device. The device protects against deflagration and stable detonation. The weight-loaded pallet type valve (5) integrated in the shock absorber (1) of the in-line detonation flame arrester is designed as a pressure relief valve. The set pressure of the valve is adjusted in the factory and can range from 2 to 35 mbar (0.8 to 14 inch W.C.). After the pressure increases 40% from its set pressure, the valve completely opens to yield the maximum volumetric flow. If installed in vent headers connected to storage tanks, the valve pallet works as a check valve. This means that the product cannot flow back from the suction line into the tank. Although several functions are integrated in a single housing, the device is extremely easy to service, which is primarily due to the right-angle design.

Once a detonation enters the flame arrester, energy is absorbed from the detonation shock wave by the integrated shock absorber, before the flame is extinguished in the narrow gaps of the FLAMEFILTER^® (3). The flame suppression is guaranteed, regardless of the valve pallet position.

The PROTEGO^® flame arrester unit (2) consists of several FLAMEFILTER^® discs and spacers firmly held in the FLAMEFILTER^® casing (4). The gap size and number of FLAMEFILTER^® discs depend on the operating conditions of the flowing mixture (explosion group, pressure, temperature). This device is available for explosion groups from IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).

The standard design is approved for an operating temperature of up to +60°C / 140°F and absolute operating pressure up to 1.2 bar / 17.4 psi. Devices with special approval for higher pressures and temperatures are available upon request.

Type-approved in accordance with the current ATEX Directive and EN ISO 16852, as well as other international standards.