Which of the following listed valves would...

Which of the following listed valves would...

Question 1 of 270705eccef9bbacbc34ba4d453e0

Which of the following listed valves would require "blow down" to insure proper operation and prevent damage due to repeated and rapid opening and closing?

Question 1 of 27070

Q

Which of the following listed valves would require "blow down" to insure proper operation and prevent damage due to repeated and rapid opening and closing?

🔍 Key Concepts

• Differences between pressure-relief, safety, and pressure-reducing/regulating valves • Purpose of a blowdown setting (the pressure drop between opening and reseating) • Which valve is used primarily for boiler overpressure protection and needs a specific blowdown to avoid rapid chatter

💭 Think About

• Think about which valve protects equipment from dangerous overpressure rather than just controlling or reducing normal operating pressure. • Which of these valves must open fully and then close only after pressure has dropped sufficiently to avoid rapid opening and closing (chattering)? • In a boiler system, which valve’s proper operation depends heavily on the difference between set pressure and reseating pressure?

✅ Before You Answer

• Identify which option is designed specifically for sudden, full-open protection against overpressure (not just gradual control). • Recall that blowdown is the intentional difference between opening and closing pressures; match that to the valve type that must avoid rapid cycling. • Eliminate any valve whose main job is to control or reduce pressure during normal operations, not strictly to protect against dangerous overpressure.