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3.11 Pressure Relief Valve Installation
Do Not operate this equipment without a pressure relief device installed to protect the AirPrep
System from over-pressurization. The ASME Code requires that all vessels be operated with
pressure relief devices in place.
If the AirPrep System does not provide for the installation of a pressure relief valve one can be
installed on the blowdown port on the pressure vessel. Refer to Figure 3.11 for an alternate location
of the air pressure relief valve.
Local regulations set the specifications for pressure relief valves; therefore it is the responsibility of
the owner of the AirPrep System to install a pressure relief valve that meets all applicable
regulations. The pressure relief device must be set at the maximum allowable working pressure of
the AirPrep System pressure vessel. See the ASME/CE vessel nameplates attached to the pressure
vessel.
Rupture Hazard. Operating the pressure vessel above the maximum allowable working pressure can
result in rupturing the pressure vessel. Install an air pressure relief valve to protect against over
pressurization of the blast vessel.
Airborne particles and loud noise hazards from relief valve exhaust air can cause serious injury and
loss of hearing. Wear approved eye and ear protection. Stay clear of exhaust air path. DO NOT
place hands or other body parts in the exhaust air path. Make sure no personnel are in the exhaust
air path. Direct the relief valve exhaust away from work area.
In special cases per request of customer a pressure relief valve may be included with the equipment.
It is the responsibility of the owner/user to confirm that the supplied pressure relief valve meets all
local regulations.
Figure 3.11 – Suggested location for air pressure relief valve
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