Does a pressure relief valve have precision?
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Does a pressure relief valve have precision? For normal pressure reducing valves, the accuracy of the pressure gauges on the inlet and outlet sides is specified. As for the valve itself, if the pressure downstream of the valve is 10 MPa, then how much will this 10 MPa value fluctuate? ? What is the best precision it can achieve? ?
There is a significant difference in precision depending on the manufacturer. The key is to keep the pressure stable before reducing it!
The accuracy of PCV must be linked to the flow rate it can provide. It can be considered this way: by how much below the set value must P2 be for it to meet (cover) the traffic volume required by the user. For standard direct-acting types, it’s about 10%; for example, if the set value is 3 and the desired flow rate is 100, then P2 needs to drop to 2.7 in order to provide a flow rate of 100. For the pilot type, 5% can be achieved, and even better at 2%. The “precision” of PCV defines the range of flow variation.