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    1 1/2" Spring Loaded Pressure Relief Valve, DN40

    5 out of 5 based on 1 reviews | Write a review
    Lower cost spring loaded pressure relief valve with a 1 1/2 inch inlet and outlet ports, nominal pressure is 16 MPa. The pressure relief valve is designed to release excessive pressure that builds up in equipment and piping systems.
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    Delivery date: 10-20 days

    Low-price spring loaded pressure relief valve with 11/2" thread, maximum import and export pressure ratio 3: 1. The pressure reducing valve has the advantages of simple structure, small size, stable outlet pressure, and long service life.


    • The pressure relief valve with a gas-tight and compact design which can be adjusted without disassembly.
    • Compact size can choose horizontal or vertical installation, easy to install and maintain, simple and convenient to adjust the pressure and easy to operate.
    • The active parts of the sealing ring such as the piston and valve sleeve are sprayed with Teflon material, which can effectively reduce the wear of the sealing ring and prolong the service life of the product.


    • Model: ATO-YS713X-16P-40
    • Size: 1 1/2 inch
    • Nominal diameter: DN40
    • Material: 304 stainless steel
    • Import and export pressure ratio: Maximum 3: 1  
    • Working temperature: Cold water ≤65 ℃, hot water ≤95 ℃
    • Nominal pressure: 16 MPa
    • Medium: Drinking water, clean water


    1 1/2 inch preesure relief valve dimension


    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

    Pressure relief valve application

    Tips: Why does the pressure at the oil outlet of the pressure relief valve rise by itself?

    In some decompression control loops, the outlet pressure of the decompression valve is used to control the control oil pressure of the electro-hydraulic directional valve or external control sequence valve. After working in the direction or direction, the flow rate at the oil outlet of the pressure reducing valve becomes zero, but the pressure still needs to maintain the original set pressure. In this case, since the valve outlet flow is zero, the flow through the decompression port is only the pilot flow. Since the pilot flow is very small, generally within 2L/min, the main valve decompression port is basically close to the fully closed position (the opening is very small), and the pilot flow flows out from the triangular groove or inclined cone surface. If the main valve core cooperates If it is too loose or worn too much, the leakage will increase. According to the flow continuity theorem, this part of leakage must also flow from the damping hole of the main valve core, that is, the flow flowing through the damping hole is composed of two parts: pilot flow and leakage, and the area of the damping hole and the oil pressure in the spring chamber of the main valve (the oil pressure in the spring chamber is determined by the pre-compression of the adjusted pressure regulating spring), in order to increase the flow through the damping hole, the oil pressure in the lower chamber of the main valve will inevitably increase. Therefore, when the outlet pressure of the pressure reducing valve is adjusted, if the outlet flow rate is zero, the outlet pressure will increase due to the loose fit of the main valve core or excessive wear.

    Existing reviews of 1 1/2" Spring Loaded Pressure Relief Valve, DN40
    Well made spring loaded pressure relief valve
    I bought this pressure relief valve for my tankless water heater, it does the job and does it well, with no leaks or pressure releases.
    From: Jobbins | Date: 27/03/2023
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