·Mainly consists of an air chamber、a balance spring、a body、a seat、a valve core
·No need for external energy drive
·Relying on the adjusted medium's own pressure changes to automatically adjust the pressure, differential pressure
·It can be used for pressure and differential pressure control of gases, liquids, and other media with a temperature ≤ 350 ℃
Nominal diameter: DN 15～DN 400
Nominal pressure: PN 16、25、40
Flow characteristic: quick opening
Operating temperature: -40℃～300℃
Seat leakage class: hard seal IV class, soft seal V class
Connection type: flange
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