Plug Valves

Plug Valves are an essential type of valve used throughout water and wastewater treatment plants for regulating fluid flow. They operate by rotating a cylindrical or conical plug with a hole, allowing operators to permit or prevent flow as needed. These valves are particularly crucial when bubble-tight shut-off and minimal pressure drop are operational requirements.

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Due to their durable design and versatility, plug valves see frequent application in a broad range of process stages, such as sludge handling, isolation within pumping systems, and flow diversion across various plant processes. Their reliable operation, coupled with relatively straightforward maintenance, makes them a preferred choice for both new installations and system retrofits within treatment facilities.

• Inlet and outlet flow control
• Sludge handling and processing
• Isolation in pump systems
• Diverting flow in treatment processes

• Routine operation: Monitoring valve function and performing manual operation as necessary
• Maintenance: Lubrication, part replacement, and removal of blockages
• Safety: Use of proper PPE and vigilance for leaks or irregular noises during operation or maintenance

• Body: Primary housing, made from cast iron, stainless steel, or plastic
• Plug: Cylindrical/conical element; rotates to allow or block flow
• Stem: Connects plug to actuator or handle
• Seat: Provides a seal when plug is in the off position
• Actuator/Operating Handle: Manual or automated operation of the plug

• Flow rate (gpm or L/s): Determined by overall system demand and application requirements
• Pressure (psi): Must match system's operating pressure
• Diameter (inches or mm): Must correspond with connected pipe size
• Material selection: Evaluated based on fluid type, temperature, and chemical compatibility

• MasterFormat Division 40 (Process Interconnections)
• Section 40 05 13 (Process Valves)

• Flowserve: Durco® T4E Plug Valve
• XOMOX®: XLD Series Plug Valves
• DeZURIK: PEC Eccentric Plug Valves

• Ball Valves: Offer similar function with a spherical ball design. Chosen for smaller sizes and cost efficiency.
• Gate Valves: Used when more precise, granular flow control is needed.
• Butterfly Valves: Selected for compactness and lighter overall weight where space and weight are considerations.