I would like to know what the structure is of this check valve with a bypass
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I haven’t seen the valve core inside. I seek advice from those who know the way. Thank you!
Just adding to the nameplate: this should be a lift-type check valve
The minimum flow valve, right? Is it connected to the pump outlet?
In special situations, such as when materials are prone to freezing or when suspensions tend to separate and cause blockages, use the minimum flow rate to prevent blockages.
When using the compilation rules specified in JB/T308-2004, several pieces of information that should be reflected are not indicated. If the model is to be compiled in accordance with the standards, it should be H41()-100; the valve body material, WCB, is indicated after 100. Since the pressure rating is higher than PN25, this value can be omitted. There were originally three letters: Z, S, and A. The combination of Z and H can be understood as the pinyin abbreviation for a check valve, while S could represent the sealing material or some kind of special code. Connecting a bypass might be to prevent crystallization or solidification, but then why is there no heat tracing or insulation?
It is the minimum flow valve, installed at the pump outlet