2-4
Opening the Controller Housing
Attention and care should be taken in maintaining, operating, and opening the pressure housing.
All samplers shipped after summer 2015 have a pressure relief valve (PRV) on the controller
housing. This valve releases automatically at a pressure differential greater than 10psi. The PRV
style may have a center hole and release tool, or the style may have a flat relief valve that must be
manually pulled out.
Observe safety precautions including removing personnel and objects from the
path of the end-cap when removing the controller housing.
Figure 2-4: Releasing Pressure Relief Valve (Flat Style)
Содержание Mark 78H-21
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