Explosion Protection

Explosion Vents

Essentially, there are two layers of stainless steel sandwiching a Teflon sheet. The latter acts as a pressure seal. The two layers of stainless steel are precision cut on a CNC laser in the factory selected burst pattern. The laser cuts slots which are terminated at either end with holes (to minimize any stress concentrations at these points) There is a "bridge" or "tab" between the slots which is not cut. Thus there are several variables which can be manipulated to "fine tune" the release pressure: the thickness of the Teflon seal to a minor degree, the thickness of the stainless steel sheet material, and the width & number of tabs" On the final production run, there are destructive tests done to establish the release pressure at ambient temperature.                                                       

44"-44" Installed HIS Vents
Vent/Door Sizing Program
Venting System Design Considerations (Under construction)
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Various Vent designs available.
Click here to view an example of  a sizing form.

ECV Rectangular Explosion Vent Sizes and Pressures
VENT SIZE VENT SIZE RELIEF AREA RELIEF AREA MINIMUM BURST PRESSURE MINIMUM BURST PRESSURE
Inch Cm Sq. Ft Sq. Meters psig mbarg
12 X 12 30 X 30 1 0.09 2 138
12 X 18 30 X 46 1.5 0.14 1.5 103
12 X 24 30 X 61 2 0.18 1.5 103
18 X 18 46 X 46 2.25 0.21 1 69
18 X 24 46 X 61 3 0.28 1 69
18 X 30 46 X 76 3.75 0.35 1 69
18 X 36 46 X 89 4.38 0.41 1 69
24 X 24 61 X 61 4 0.37 1 69
24 X 30 61 X 76 5 0.46 1 69
24 X 36 61 X 91 6 0.56 0.5 34
24 X 42 61 X 107 7 0.65 0.5 34
30 X 30 76 X 76 6.25 0.58 0.5 34
30 X 36 76 X 91 7.5 0.69 0.5 34
30 X 44 76 X 112 9.17 0.85 0.5 34
36 X 36 91 X 91 9 0.83 0.5 34
36 X 44 91 X 112 11 1.02 0.5 34
36 X 48 91 X 122 12 1.11 0.5 34
44 X 44 112 X 112 13.44 1.25 0.5 34
44 X 54 112 X 137 16.5 1.53 0.5 34
44 X 69 112 X 175 21.08 1.96 0.5 34


ECV Round Explosion Vent Sizes and Pressures
VENT SIZE VENT SIZE RELIEF AREA RELIEF AREA MINIMUM BURST PRESSURE MINIMUM BURST PRESSURE
Inch Cm. Sq. Ft Sq. Meters psig mbarg
12 30 0.78 0.07 2 138
14 36 1.07 0.1 1.5 103
16 41 1.4 0.13 1.3 90
18 46 1.77 0.16 1 69
20 51 2.18 0.2 1 69
24 61 3.14 0.29 1 69
30 76 4.91 0.46 0.5 34
32 81 5.59 0.52 0.5 34
36 91 7.07 0.66 0.5 34
40 102 8.73 0.81 0.5 34
42 107 9.62 0.89 0.5 34

Other Sizes Available upon Request

Notes
Maximum burst pressure is 8 psig (552 mbar)

Maximum operating temperature is 450°F (230°C)

Applicable tolerances:
±0.5 psi (34 mbar) for pressures >=1.0 psi (69 mbar)
±0.3 psi (21 mbar) for pressures <1.0 psi (69 mbar)

Maximum tolerating working pressure is 50 % of the rated release pressure, which for design purposes, should be 50% of the lower end of the tolerance (should the be the upper end of the tolerance for the purposes of relief area sizing).

Standard construction is SST/TFE/SST - other materials available on request

Various other styles/construction accessories and special vent styles to accommodate high vacuum service are available - please consult factory.

Exploguard offers various accessories and special vent styles to accommodate high vacuum service - please consult factory.