Protego BR
PROTEGO®
Excellence in Safety and Environment

DR/ES-V

In-Line Detonation Flame Arrester with integrated pressure relief valve, for stable detonations and deflagrations in right angle design with shock absorber, unidirectional

Features

Integration into a Single Device
Integration of Detonation Flame Arrestors and Valves in a Device
Optimal Use as Overflow Valve
in Venting and Gas Supply Lines
Reduced Number of FLAMEFILTER® Discs
Low Number of FLAMEFILTER® Discs Due to Shock Absorber Technology
Fastest Disassembly and Assembly
of Single FLAMEFILTER®
Explosion Safety
Provides Protection Against Deflagration and Stable Detonation
Check Valve
Makes Starting the Pump Easier
Extended Application Range
for Elevated Operating Temperatures and Pressures
Spare Parts
Cost-Effective Spare Parts
Function and Description

Protects Against Deflagration and Stable Detonation

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.

In-Line Detonation Flame Arrester for Vent Headers

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.

For Explosion Groups IIA to IIB3

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. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data

Dimensions

To select the nominal size (DN), please use the flow capacity charts on the following pages

DN25 / 1"32 / 1¼“40 / 1½“50 / 2“65 / 2½“80 / 3“100 / 4“125 / 5“150 / 6"200 / 8"
a125 / 4.92125 / 4.92153 / 6.02155 / 6.10198 / 7.80200 / 7.87250 / 9.84332 / 13.07335 / 13.19425 / 16.73
b140 / 5.51140 / 5.51183 / 7.20185 / 7.28223 / 8.78225 / 8.86290 / 11.42357 / 14.06360 / 14.17505 / 19.88
c237 / 9.33237 / 9.33305 / 12.01305 / 12.01395 / 15.55395 / 15.55460 / 18.11575 / 22.64575 / 22.64863 / 33.98
c1345 / 13.58345 / 13.58410 / 16.14410 / 16.14530 / 20.87530 / 20.87615 / 24.21790 / 31.10790 / 31.101295 / 50.98
d149 / 5.87149 / 5.87210 / 8.27210 / 8.27275 / 10.83275 / 10.83325 / 12.80460 / 18.11460 / 18.11620 / 24.41

Dimensions in mm / inches

Selection of explosion group

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.DN25 /  1"32 / 1¼"40 / 1½"50 / 2"65 / 2½"80 / 3"100 / 4"125 / 5"150 / 6"200 / 8"
IIAPmax4,0 / 58.04,0 / 58.04,0 / 58.04,0 / 58.02,9 / 42.12,9 / 42.12,0 / 29.02,0 / 29.02,0 / 29.01,2 / 17.4
IIB3Pmax3,0 / 43.53,0 / 43.52,0 / 29.02,0 / 29.02,0 / 29.02,0 / 29.01,5 / 21.71,4 / 20.31,4 / 20.31,1 / 15.9

Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request

Specification of max. operating temperature

≤ 60°C / 140°FTmaximum allowable operating temperature in °C
-Designation

higher operating temperatures upon request

Material selection for housing

DesignBCD
DesignSteelStainless SteelHastelloy
Heating jacket (DR / ES-V-H-...)SteelStainless SteelStainless Steel
Cover with shock absorberSteelStainless SteelHastelloy
GasketsPTFEPTFEPTFE
Valve seatStainless SteelStainless SteelStainless Steel
Flame arrester unitAC, DE

The housing and the cover with shock absorber can also be delivered in steel with an ECTFE coating.

Special materials upon request

Material combinations of flame arrester unit

Design ACDE
FLAMEFILTER® cageSteelStainless SteelStainless SteelHastelloy
FLAMEFILTER®*Stainless SteelStainless SteelHastelloyHastelloy
SpacerStainless SteelStainless SteelHastelloyHastelloy

* 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 valve pallet

DesignABC
Pressure rangeIIIIII
Set pressure [mbar]+2.0 up to +3.5>+3.5 up to +14>+14 up to 35
[inch W.C.]+0.8 up to +1.4>+1.4 up to +5.6>+5.6 up to 14
Valve palletAluminiumStainless SteelStainless Steel
SealingFEPFEPMetal to Metal

Flange connection type

EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.

other connections 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”.