Temperature-actuated valve assembly

A temperature-actuated valve assembly, comprising:

• a valve assembly housing including a main flow passage and a control flow passage;
• a pneumatically-actuated valve fluidly coupled to the control flow passage and configured to control fluid flow through the main flow passage;
• a first thermostatic valve in thermal communication with the main flow passage and configured to control fluid flow through the control flow passage, the first thermostatic valve configured to actuate at a first predetermined temperature;
• and
• a second thermostatic valve in thermal communication with the main flow passage and configured to control fluid flow through the control flow passage, the second thermostatic valve configured to actuate at a second predetermined temperature, the second predetermined temperature higher than the first predetermined temperature.

A temperature-actuated valve assembly, comprising:

• a valve assembly housing, comprising:
• a main flow passage;
• and
• a control flow passage including first and second branches;
• first and second thermostatic valves configured to control the fluid flow through the first and second branches, respectively, the first and second thermostatic valves in thermal communication with the main flow passage and each configured to open at a different predetermined temperature;
• and
• a pneumatically-actuated valve fluidly coupled to the control flow passage and controlling fluid flow through the main flow passage, the pneumatically-actuated valve configured to close when pressurized fluid flows through the main control flow passage.