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    8 inch Pilot Operated Pressure Relief Valve, DN200

    Lower cost pilot operated pressure relief valve with 8" inlet and outlet ports, flanged type connection, pressure rating PN16, the shell test pressure is 2.4 MPa. The water relief valve's body is made of ductile iron, thick and fastened, with humanized design and long service life.
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    Delivery date: 10-20 days

    ATO high quality pressure relief valve with DN200 nominal diameter, nominal pressure is 16 MPa. The pressure reducing valve has exquisite appearance, smooth operation and stable performance.


    • Pilot-operated valves for limiting a system pressure
    • Operation using proportional solenoid
    • Maximum pressure limitation
    • Valve and control electronics from a single source
    • Little manufacturing tolerance of the command value
    • Pressure characteristic curve


    Pilot Operated Pressure Relief Valve Details


    • Model: ATO-200X-DN200
    • Size: 8 inch
    • Nominal diameter: DN200
    • Structural form: Diaphragm type
    • Pressure rating: PN16
    • Shell test pressure: 2.4MPa
    • Sealing test pressure: 1.76MPa
    • Ambient temperature: ≤80℃
    • Connection method: Flange
    • Medium: Water
    • Valve body material: Ductile iron QT450


    Pilot operated preesure relief valve dimension

    Dimension L D2 D1 x-n T F D
    DN200 430mm 340mm 295mm 8-φ23 12-φ23 20mm 3mm 266mm


    Pilot operated preesure relief valve dimension


    • It is recommended to install an exhaust valve on the top of the riser to make the pressure reducing valve work more smoothly.
    • Before installing the pressure relief valve, check the valve for unusual items and be sure to flush the pipeline.
    • Installation method: Horizontal or vertical installation, single valve set.

    Pressure Relief Valve Application

    Pilot operated pressure relief valve application

    Tips: Why can't the pilot-operated pressure reducing valve decompress and stabilize the pressure?

    • The direction of the water inlet and outlet is reversed, just replace and adjust.
    • The main valve diaphragm is damaged, just replace the main valve diaphragm.
    • The ball valve is not opened, just open the ball valve.
    • The adjustable decompression diaphragm is damaged, just replace the
    • Adjustable decompression valve diaphragm.
    • There are foreign objects in the valve body, just clean them up.
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