Angle Valves

Angle valves are specialized flow control devices designed with an inlet and outlet arranged at a 90-degree angle, primarily used to regulate the flow and pressure of fluids within piping systems. In municipal water or wastewater treatment plants, angle valves are essential for directing, managing, and halting the movement of water, wastewater, or process chemicals at critical stages within the treatment process.

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Their design allows for efficient isolation, throttling, or diversion of flow, often making them preferable in compact or space-constrained piping layouts. The reliability of angle valves in ensuring operational safety and system optimization makes them indispensable for plant operators overseeing influent, effluent, and intermediate unit processes.

• Influent and effluent pipelines: Regulate incoming and outgoing water flow within treatment systems.
• Sludge treatment units: Control the movement and processing of sludge.
• Disinfection processes: Manage the flow rate of disinfectant chemicals to ensure effective dosing and mixing.

• Routine inspection: Check for leaks or signs of wear, especially at packing glands and seals.
• Regular maintenance: Lubricate stems and replace worn discs or washers to prevent failures.
• Safety practices: Always wear appropriate PPE and exercise caution when opening valves under pressure to avoid sudden releases.

• Valve Body: Provides the durable, angled structure of the valve; material selection affects longevity and compatibility.
• Stem: Mechanism for manual or automated operation, connecting operator input to valve movement.
• Disc or Washer: Critical sealing element that stops fluid flow when the valve is closed.
• Packing Gland: Prevents leaks along the stem, ensuring system integrity and operator safety.

• Flow rate (gpm or L/s): Determines necessary valve sizing for process requirements.
• Pressure (psi): Influences the choice of construction materials based on system operating pressures.
• Temperature: Certain materials (e.g., brass, stainless steel, PVC) are selected according to the process fluid temperature range.
• Corrosion resistance: Material compatibility with process chemicals and fluids is essential.

• MasterFormat Division 40: Process Interconnections
• Section 40 05 13: Process Piping and Equipment Heat Tracing

• DeZURIK: (APCO Angle Flow Valves, CRF series)
• NIBCO: (F-617-0 Angle Valve)
• Parker: (Angle Seat Valves)

• Ball Valves: Provide a tight seal and are widely used for reliable shutoff applications, though they operate using a rotating ball mechanism rather than an angled pathway.
• Gate Valves: Best for applications requiring the valve to be fully open or fully closed, less suitable for regular flow regulation compared to angle valves.