Multi-function pressure regulation valve

A liquid flow control device including:

• a housing including a flow passage extending from an inlet of the housing, through the housing to an outlet of the housing;
• a hollow conduit which defines a conduit passage included in the flow passage of the housing;
• a valve seat in the housing and disposed in the flow passage immediately upstream of an inlet to the conduit passage;
• a shuttle within the housing and configured to move reciprocally with respect to both the housing and the hollow conduit, wherein the shuttle has an upstream-most position within the housing at which the shuttle abuts the valve seat and closes the flow passage and a downstream position displaced from the valve seat and which opens the flow passage;
• a sealed chamber within the housing and between the hollow conduit and the shuttle, wherein the sealed chamber is configured to be operated at pressures other than atmospheric pressure;
• and
• a port in the housing and open to the sealed chamber, wherein the port is configured to be connected to a source of a pressurized fluid.