Abstract: A gas regulation device to delay for a predetermined time the closing of a gas actuated main valve of the type having a main valve conduit connected to the main valve for carrying the gas which actuates the main valve. The regulation device comprises a first conduit which can be disposed in the main valve conduit to form a portion thereof and a check valve which is disposed in the first conduit so that gas can pass through the first conduit only in one direction. A bypass conduit is connected to the first conduit across the check valve such that gas can pass from the first conduit on one side of the check valve through the bypass conduit to the first conduit on the other side of the check valve. A flow regulation device is disposed in the bypass conduit to limit the flow of gas through said bypass conduit such that the pressure drop or increase required to open or close the main valve is delayed for a predetermined time.

Abstract: A device and method for purging a liquid carrying conduit with pressurized gas, the device having a reservoir for holding a quantity of gas which is connected to a supply of pressurized gas. The reservoir is also connected to the liquid carrying conduit. In response to a first signal, a first valve isolates the gas reservoir and the supply of pressurized gas and a second valve communicates the reservoir and the liquid carrying conduit. In response to a second signal the first valve communicates the reservoir and the supply of pressurized gas and the second valve isolates the reservoir and the liquid carrying conduit. The first signal can indicate when the liquid carrying conduit is carrying liquid and the second signal can indicate when the conduit can be purged. Preferably, this device can be attached to a gas well separator to prevent freezing of the pipe conveying liquid away from the separator.