Why can’t the outlet pressure of a pressure relief valve be adjusted to the minimum setting range?
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The inlet pressure of the pressure relief valve is 8 kilograms, and the outlet pressure can be adjusted to 3 kilograms； But it cannot be adjusted to 1 kilogram; even after removing the spring, the outlet pressure reaches 2.5 kilograms ； The outlet pressure must be adjustable to at least 1 kilogram ； Could the experts please help figure out what the reasons are and what solutions exist? Only then can the outlet pressure be reduced! Thank you here!
Just buy it directly and have it adjusted to 1 kilogram. Generally, pressure relief valves are standardized.
The adjustment range of this pressure relief valve is 1 to 5.5 kilograms, so the device should be able to be set to 1 kilogram. However, in practice it’s not possible to reach this lowest value. What is the reason for this, and how can it be improved?；
Find the supplier to return or exchange the product. If handling it oneself, the valve core needs to have its weight removed, but the spring cannot be taken out. But it’s still better not to make changes on your own, as it will be difficult to explain things if an accident occurs later. For reference.
It’s due to the valve itself. Changing it from 8 kilograms to 1 kilogram should not be a problem with a normal valve; it’s possible that the valve chosen initially was defective. Leave a message for technical inquiries regarding pipeline valves.
A self-acting pressure reducing valve has a maximum pressure reduction ratio; beyond that, it cannot be adjusted. Buy a better pressure relief valve. What medium are you?
Increase capacity and reduce pressure; if the pressure reducing valve cannot achieve the required pressure, try increasing the diameter of the pipe downstream of the valve
To achieve a lower outlet pressure, a control valve or manual valve should be installed in front of the pressure reducing valve; by blocking flow, the pressure at the inlet of the pressure reducing valve is reduced!
Because the flow is blocked. You chose a valve that is too large.
The outlet pressure of a pressure regulator is related to the inlet pressure; if the inlet pressure is too high, a pressure regulator can be installed