Which valve is typically equipped with a strainer?

Which valve is typically equipped with a strainer?

• A. Gate Valve
• B. Check Valve
• C. Ball Valve
• D. PRV

Answer: (D)

Debris in the fluid can damage or interfere with delicate valve mechanisms, so a strainer is placed upstream of devices that have precision parts. A pressure reducing valve has a sensitive regulation system—diaphragm, pilot, and tight clearances—that can be fouled or jammed by solids. Installing a strainer before the valve catches the grit and prevents the regulator from sticking or failing to hold downstream pressure, helping ensure reliable operation. Other valves shown are primarily simple shutoff or one-way devices. They don’t rely on a precise internal regulation mechanism in the same way, and strainers aren’t typically built into them as a standard feature. While strainers can be used in the piping ahead of various valves, the type most commonly equipped with an integral or upstream strainer for protection is the pressure reducing valve.

Debris in the fluid can damage or interfere with delicate valve mechanisms, so a strainer is placed upstream of devices that have precision parts. A pressure reducing valve has a sensitive regulation system—diaphragm, pilot, and tight clearances—that can be fouled or jammed by solids. Installing a strainer before the valve catches the grit and prevents the regulator from sticking or failing to hold downstream pressure, helping ensure reliable operation.

Other valves shown are primarily simple shutoff or one-way devices. They don’t rely on a precise internal regulation mechanism in the same way, and strainers aren’t typically built into them as a standard feature. While strainers can be used in the piping ahead of various valves, the type most commonly equipped with an integral or upstream strainer for protection is the pressure reducing valve.