PSD explosion relief doors are available in a variety
of standard sizes. The number and size of doors required is a function
of the vent ratio for the particular application (vent ratio is the
ratio of pressure relief area required to the total volume enclosed
in the housing or vessel). Our technical staff can assist with the selection
of the correct doors for your applications.
PSD explosion relief doors can be mounted in any altitude,
with the hinge axis vertical, horizontal (top or bottom of door) or
angled. The opening required in the housing is equal to the actual door
size plus 6 inches in both the length and width dimensions.
|PSD explosion relief doors are
available with a number of optional features. These include:
||Aluminum or stainless steel facing.
Special alloys are also available.
||Strip heaters to prevent icing. These
heaters are factory installed, with pigtail leads. Please specify
||Alarm switches for remote
indication of door opening.
Test Work VDI tests conducted by Health & Safety Laboratory
of Buxton, England had the following conclusions:
||The effectiveness of the door was assessed
at a Pstat of 0.1 bar and was found to be equivalent to a weak bursting
foil having a Pstat of 0.1 bar.
||The lowest pressure at which the door
opened in the air blast was 0.017 bar, and in the explosion tests
was 0.022 bar.
||PSD explosion relief door cannot prevent
deflagrations, detonations, or explosions, and it is not intended
for the purpose of preventing such events.
and explosions take many forms and are subject to a wide range of
variables. As a result, their sources, occurrences, sizes and the
direction and velocity of their destructive forces are extremely
difficult, if not impossible to predict.
||The purpose of the PSD
explosion relief door is to reduce, if possible, the damage to equipment
fitted with PSD doors resulting from deflagrations, detonations,
and explosions. Because the potential for damage for such events
is a function of a wide range of variables: size and strength of
deflagrations, detonations, or explosion, strength and integrity
of the equipment fitted with PSD doors, vent ratio (the ratio of
square feet of vent area to cubic feet of internal volume in the
vessel or equipment equipped with PSD doors), and conditions and
circumstances in which the PSD doors may be operating.
It is impossible to predict to what extent, if any, damage to equipment
fitted with PSD doors in such events may be reduced by reason of
the installation of PSD.
||It is always recommended
that a protective cage be installed on each door to protect personnel
from possible Fragmentation or from opening movement of the door.