What type of valve operates using a gas thermostat instead of a rocker arm?

The correct answer is a bleed type combination gas valve. This type of valve functions by utilizing a gas thermostat for control, which allows for more precise regulation of gas flow compared to traditional methods. In a bleed type combination gas valve, the thermostat detects the temperature changes and adjusts the gas supply accordingly to maintain the desired temperature in the cooking equipment.

This operational method is particularly advantageous in commercial settings where consistent temperature control is critical for food safety and cooking efficiency. The use of a gas thermostat eliminates the need for a rocker arm, which is a mechanical component typically associated with other types of valves, thus providing a more reliable and maintenance-friendly solution.

Understanding the unique operational mechanisms of these valves helps technicians troubleshoot and service gas equipment effectively, ensuring safety and performance standards are met in commercial kitchens.