Factory Price Ggg50 Butterfly Valve - Double sphere air release valve with flange A-H-02 – Deye

Quick Detail
Design standard: DIN/BS/ANSI EN558
Body material: Cast iron, ductile iron
Screen/mesh: ss304, ss316
Nominal diameter: 3″ DN80
Pressure: PN16
End connection: RF. Flange EN1902-1
Working temperature: -30℃~+300℃.
Test and inspection: API 598.
Connection: Flange ends conform to EN1092-1/ ANSI 150LBS

Performance:

● The Air Release Valve is automatic in operation. They have much smaller orifices than Vacuum Valves. They release small pockets of air that gather at the high points of a system after it is filled and under pressure. 
● The Air Release Valve has the ability to open against internal pressure because it has a small orifice and a leverage mechanism that multiplies the force of the float.
This force must be greater than the internal pressure across the orifice in order to open the orifice when a pocket of air needs to be vented