Which component directly influences the working gas pressure in a combination gas valve?

The pressure regulator is a critical component that directly influences the working gas pressure in a combination gas valve. Its primary function is to control and maintain a specific pressure level of gas that is delivered to the appliance. It achieves this by adjusting the flow of gas based on the demand from the equipment, ensuring that the pressure remains within safe and optimal operational limits.

In a gas system, maintaining the correct pressure is vital for efficient operation and safety. The pressure regulator monitors incoming gas pressure and reduces it as necessary, which is particularly important because the pressure from the gas line can vary significantly. By stabilizing the pressure, it allows the gas appliance to function correctly and helps prevent issues related to excessive or insufficient gas flow.

The other components mentioned, while important to the overall function of the gas valve, do not directly influence the working gas pressure in the same manner. The solenoid coil, for example, is responsible for activating the gas valve, enabling or disabling gas flow rather than managing pressure. The diaphragm and rocker arm are involved in the mechanical operation but are not primarily responsible for regulating pressure. Thus, the pressure regulator plays the essential role of maintaining the desired working gas pressure in the system.