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NORGREN pressure reducing valve installation precautions introduction

For ease of operation and maintenance, the valve is typically mounted upright on a horizontal pipe. The installation of the pressure reducing valve must be in accordance with the direction of the arrow on the valve body to maintain the direction of fluid flow. If the water quality is not clean and contains some impurities, the filter must be installed at the upstream inlet of the pressure reducing valve. In order to prevent pressure overpressure after the valve, a pressure reducing valve should be installed at not less than 4M from the valve outlet. The pressure reducing valve plays a certain role in the pipeline. In order to prevent the damage of the water hammer, a small expansion tank can also be installed to prevent damage to the pipeline and the valve. The filter must be installed in front of the inlet pipe of the pressure reducing valve and expand. The water tank must be installed after the pressure relief valve outlet! If the pressure relief valve needs to be installed in a hot water system, you must install a check valve between the pressure relief valve and the expansion tank. In this way, the expansion tank can absorb the volume of water increased due to thermal expansion, and can prevent the influence of hot water return or pressure fluctuation on the pressure reducing valve, and ensure the long-term normal operation of the pressure reducing valve.

1. The pressure reducing valve should be inspected before installation: its specifications and models should be consistent with the design; the connecting parts of the external control line and the pilot valve should not be loose; the appearance should be free of mechanical damage, and the foreign objects in the valve should be removed. Inspection method: check drawing, inspection and hand check

2. The flow direction of the pressure reducing valve should be consistent with the water flow in the water supply pipe network.

3. The filter should be installed on the inlet side and the control valve should be installed before and after it.

4. The adjustable pressure reducing valve should be installed horizontally and the valve cover should be upward.

5. Proportional pressure reducing valve should be installed vertically; when horizontally installed, the single breathing port pressure reducing valve should have its orifice downward, and the double breathing hole pressure reducing valve should have a horizontal position.

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