Because pressure is on the downstream side of a PRV, oil will naturally seep into which component?

Because pressure is on the downstream side of a PRV, oil will naturally seep into which component?

• A. Spring chamber
• B. Spool
• C. Reservoir
• D. Tank

Answer: (A)

Oil will seep into the spring chamber because that small cavity houses the valve’s spring and sits right in the path of the downstream pressure. When the downstream side is pressurized, tiny leaks around seals and past the valve face tend to migrate into this nearby spring chamber, which is the space designed to be in contact with the valve internals. This seepage helps lubricate the moving parts and is a normal leakage path for the PRV. The spool is the moving part inside, not a separate oil collection space, and the reservoir or tank are large oil storage areas rather than specific seepage targets in normal operation.

Oil will seep into the spring chamber because that small cavity houses the valve’s spring and sits right in the path of the downstream pressure. When the downstream side is pressurized, tiny leaks around seals and past the valve face tend to migrate into this nearby spring chamber, which is the space designed to be in contact with the valve internals. This seepage helps lubricate the moving parts and is a normal leakage path for the PRV. The spool is the moving part inside, not a separate oil collection space, and the reservoir or tank are large oil storage areas rather than specific seepage targets in normal operation.