Issues regarding the spring force of the air valve in vertical reciprocating pumps
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For the JZJW600/300/200 unit and the WLW-200B primary pump, the air valves are ring-type. Previously, the ultimate vacuum level of the reciprocating pump was -96 Kpa; after replacing the air valve springs in February, the vacuum level improved to -92 Kpa. This increase in vacuum level resulted in higher load on the Roots pump. The temperature of the intake valve of the reciprocating pump was 52°C, while the temperature of the exhaust valve was 90°C. As a result, the vacuum level of the system was not satisfactory. Is it really a problem with the spring, and how should I choose a spring? If anyone knows the answer, I would appreciate their advice. Wishing everyone great success in 2018 and easy work.
It would be better to replace the air valve or spring and compare them, as that makes it easier to make a judgment