What component is used to relieve pressure after the discharge valve has been closed?

What component is used to relieve pressure after the discharge valve has been closed?

• A. Bleeder valve
• B. Relief valve
• C. Check valve
• D. Gate valve

Answer: (A)

When a discharge valve is closed, the line can still hold residual pressure from the fluid in it. A bleeder valve provides a controlled vent path to atmosphere, allowing that trapped pressure to escape gradually so the system can be depressurized safely for maintenance or to prevent pressure-related shocks. The other devices have different roles: a relief valve protects the system by opening at a set high pressure to prevent overpressure, not for normal depressurizing after a valve is closed; a check valve prevents backflow; a gate valve simply shuts off flow and does not vent pressure.

When a discharge valve is closed, the line can still hold residual pressure from the fluid in it. A bleeder valve provides a controlled vent path to atmosphere, allowing that trapped pressure to escape gradually so the system can be depressurized safely for maintenance or to prevent pressure-related shocks. The other devices have different roles: a relief valve protects the system by opening at a set high pressure to prevent overpressure, not for normal depressurizing after a valve is closed; a check valve prevents backflow; a gate valve simply shuts off flow and does not vent pressure.