Which statement correctly describes the function of the integral check in valve assemblies?

Which statement correctly describes the function of the integral check in valve assemblies?

• A. A check valve built into the same body with a sequence valve
• B. A valve used to bypass flow
• C. A valve that reverses flow
• D. A valve that reduces pressure

Answer: (A)

In valve assemblies, an integral check is a one-way valve built into the same body as a sequence valve to prevent backflow and ensure the sequencing function operates reliably. This common arrangement keeps fluid from reversing through the sequence path when pressures change, so the downstream circuit only sees flow in the intended direction and the primary valve can establish the required pressure before the next stage activates. It’s not simply a bypass, a reversing valve, or a pressure-reducing device—the integral check specifically provides one-way flow within the same valve body to support proper sequencing.

In valve assemblies, an integral check is a one-way valve built into the same body as a sequence valve to prevent backflow and ensure the sequencing function operates reliably. This common arrangement keeps fluid from reversing through the sequence path when pressures change, so the downstream circuit only sees flow in the intended direction and the primary valve can establish the required pressure before the next stage activates. It’s not simply a bypass, a reversing valve, or a pressure-reducing device—the integral check specifically provides one-way flow within the same valve body to support proper sequencing.