A check valve is sometimes used with a sequence valve to what?

A check valve is sometimes used with a sequence valve to what?

• A. Allow reverse flow
• B. Keep the valve from leaking
• C. Build pressure
• D. Prevent backflow

Answer: (A)

The key idea is how sequencing valves control the order of operation and how a check valve can provide a path when the system needs to reset. A sequence valve holds back flow into the next circuit until the first circuit reaches a set pressure, ensuring one action completes before the next begins. When the machine needs to reverse or reset, you often require fluid to flow back through the line. A check valve placed with the sequence valve gives a bypass path for this reverse flow, allowing fluid to return (around the sequencing element) instead of being trapped. In short, the combination is used to allow reverse flow to enable proper reset and cycling of the hydraulic sequence.

The key idea is how sequencing valves control the order of operation and how a check valve can provide a path when the system needs to reset. A sequence valve holds back flow into the next circuit until the first circuit reaches a set pressure, ensuring one action completes before the next begins. When the machine needs to reverse or reset, you often require fluid to flow back through the line. A check valve placed with the sequence valve gives a bypass path for this reverse flow, allowing fluid to return (around the sequencing element) instead of being trapped. In short, the combination is used to allow reverse flow to enable proper reset and cycling of the hydraulic sequence.