The model ‘FGK’ equalizing check valve choke is a top No-Go wireline retrievable tool which controls upward flow and prevents downward flow. It is landed and set in the type ‘F’ landing Nipple. An integral, erosion resistant, ceramic orifice is sized to control the upward flow as desired, while downward flow is checked with a ball and seat device.Pressure can be equalized across the valve by breaking the equalizing plug.