Assertion: safety valve's pressure | /r/CapableOf | hold the valve
Facets:
value: with the loss of surface pressurisation
type: OTHER
value: in a closed position
type: MANNER
Source sentences:
text: Because the diaphragm has a larger surface area than the plunger, the same pressure can hold the valve in a closed position.
text: However, if the valve is too far down the well, then the weight of the hydraulic fluid alone may apply sufficient pressure to keep the valve open, even with the loss of surface pressurisation.