Could you further describe the importance of the orientation of SRV placed on the outlet of venting systems?

The SRV orientation is critical for many reasons. Many of these are:

1. Manufacturer recommendations – Manufacturers may require a certain orientation based on the internal design.
2. To ensure no back pressure changes the setpoint beyond allowable design
3. To ensure moisture does not enter the relief device. This is critical for the operation for LH2 and also for GH2 (in climates that may drop below the freezing point of water).
4. To ensure other impurities do not enter the relief device (for instance, if oil is backed into the vent system).
5. To ensure the relief device is supported correctly and the reaction forces during the device opening are managed for no movement. The orientation of the vent system must also ensure moisture cannot block the relief valve
   outlet.