During installation, which component helps seal between the subplate and the valve to prevent leaks?

During installation, which component helps seal between the subplate and the valve to prevent leaks?

• A. Seals
• B. Gaskets
• C. Washers
• D. O-rings

Answer: (D)

O-rings are the right choice because they provide a reliable, circumferential seal at the interface between the valve and the subplate. Placed in a groove, the round cross-section of an O-ring is compressed evenly when the parts are tightened, filling gaps and irregularities all around the connection. This elasticity lets the seal maintain pressure under operating conditions and resist leaks as air flows through the system. Generic seals are too broad a term and don’t specify the shape or groove fit that makes a true circumferential seal. Gaskets are typically used on flat, flange-type joints and aren’t ideal for sealing around a circular interface like a valve in a subplate. Washers mainly distribute load or act as spacers and aren’t intended to create a tight air seal. O-rings, with their designed fit for round interfaces and grooves, give the most dependable seal in this installation.

O-rings are the right choice because they provide a reliable, circumferential seal at the interface between the valve and the subplate. Placed in a groove, the round cross-section of an O-ring is compressed evenly when the parts are tightened, filling gaps and irregularities all around the connection. This elasticity lets the seal maintain pressure under operating conditions and resist leaks as air flows through the system.

Generic seals are too broad a term and don’t specify the shape or groove fit that makes a true circumferential seal. Gaskets are typically used on flat, flange-type joints and aren’t ideal for sealing around a circular interface like a valve in a subplate. Washers mainly distribute load or act as spacers and aren’t intended to create a tight air seal. O-rings, with their designed fit for round interfaces and grooves, give the most dependable seal in this installation.