Temperature-controlled pressure regulator assemblies

A temperature-controlled pressure regulator assembly, comprising:

• a regulator having a regulator body, a valve seat, an inlet, and an outlet;
• the body defining a flow passage fluidly connecting the inlet and the outlet;
• a control element disposed in the flow passage and shiftable between a first position seated against the valve seat and a second position spaced away from the valve seat;
• a heat chamber, a portion of the flow passage extending through the heat chamber;
• a heater positioned to convey heat to the heat chamber thereby conveying heat to a fluid in the portion of the flow passage;
• a controller electrically coupled to the heater by a control circuit, the controller coupled to a power source and arranged to control the heater;
• a thermal cut-off fuse operatively coupled to the circuit, the thermal cut-off fuse arranged to electrically decouple the heater from the control circuit in response to a temperature exceeding a threshold, thereby deactivating the heater;
• wherein the thermal cut-off fuse is disposed in a fuse holder;
• and
• wherein an internal surface of the heater bonnet comprises an internal step and an internal groove, and wherein the heater fitting includes a flange, and including an internal lock ring sized to fit in the internal groove and engage the flange to secure the heater fitting within the heater bonnet.

A temperature-controlled pressure regulator assembly, comprising:

• a regulator having a regulator body, a valve seat, an inlet, and an outlet;
• the body defining a flow passage fluidly connecting the inlet and the outlet, and a control element disposed in the flow passage and shiftable between a first position seated against the valve seat and a second position spaced away from the valve seat;
• a portion of the flow passage extending through a heat chamber, and a heater positioned to convey heat to the heat chamber thereby conveying heat to a fluid in the portion of the flow passage;
• a controller electrically coupled to the heater by a control circuit, the controller coupled to a power source and arranged to control the heater;
• a thermal cut-off fuse operatively coupled to the circuit, the thermal cut-off fuse arranged to electrically decouple the heater from the control circuit in response to a temperature exceeding a threshold, thereby deactivating the heater;
• and
• wherein the thermal cut-off fuse is disposed in a circular fuse holder and positioned adjacent the heater and adjacent a longitudinal center of the heat chamber.

A heater assembly for a temperature-controlled pressure regulator, comprising:

• a heater sized for insertion into a heat chamber of the pressure regulator and arranged to convey heat into the heat chamber;
• the heater including a control circuit, the control circuit arranged for connection to a controller;
• the heater carried by a heater fitting, the heater fitting including a bore and arranged for securement to the heat chamber;
• a thermal cut-off fuse operatively disposed in the circuit, the thermal cut-off fuse arranged to electrically decouple the heater from the control circuit in response to a temperature exceeding a threshold, thereby deactivating the heater;
• and
• a fuse holder coupled to the heater fitting, the fuse holder including a recess sized to receive the thermal cut-off fuse, the fuse holder sized for insertion in the bore of the heater fitting, whereby by the thermal cut-off fuse is positioned adjacent the heater and adjacent a longitudinal center of the heat chamber.