Answer :
Final answer:
A check valve is used to protect the primary circuit from the secondary circuit by allowing fluid flow in only one direction, preventing backflow and contamination. Therefore the correct answer is b) Check valve.
Explanation:
The valve used to protect the primary circuit from the secondary circuit is a check valve. A check valve is designed to allow fluid to flow through it in only one direction, thus protecting the components in the primary circuit from any backflow or contamination from the secondary circuit.
It is particularly important in systems where the purity of the fluid in the primary circuit must be maintained or where pressure differentials between the circuits must not be allowed to affect each other adversely.
The correct answer is b) Check valve. A check valve is used to protect the primary circuit from the secondary circuit. It allows fluid or gas to flow in one direction and prevents backflow in the opposite direction. This ensures that the primary circuit is not contaminated by the secondary circuit.
