A flow control device that stops or allows the flow of a refrigerant in a refrigeration system based on an electric signal is called a

A flow control device that stops or allows the flow of a refrigerant in a refrigeration system based on an electric signal is called a

• A. Solenoid valve
• B. Check valve
• C. Expansion valve
• D. Shutoff valve

Answer: (A)

Electric control of refrigerant flow is achieved with a solenoid valve. It uses an electromagnetic coil (solenoid) to move the valve core and either block or permit flow in response to an electrical control signal. This on/off actuation is what makes it ideal for automatic control in refrigeration systems. A check valve is a passive device that prevents backflow and doesn’t respond to electricity. An expansion valve modulates flow to control superheat, and while electronic variants exist, they aren’t simply operated by a direct on/off electrical signal in the same way. A shutoff valve is typically manually or pneumatically operated and not inherently designed for electric signal control.

Electric control of refrigerant flow is achieved with a solenoid valve. It uses an electromagnetic coil (solenoid) to move the valve core and either block or permit flow in response to an electrical control signal. This on/off actuation is what makes it ideal for automatic control in refrigeration systems.

A check valve is a passive device that prevents backflow and doesn’t respond to electricity. An expansion valve modulates flow to control superheat, and while electronic variants exist, they aren’t simply operated by a direct on/off electrical signal in the same way. A shutoff valve is typically manually or pneumatically operated and not inherently designed for electric signal control.