◆Breathable Valve Overview:

The breathing valve is installed at the top of the storage tank, featuring positive overpressure or vacuum overpressure protection functions. This ensures that the liquid inside the tank can flow in and out without obstruction. When materials are introduced into the tank, a large amount of gas is expelled outward (referred to as positive pressure). Conversely, when materials are discharged from the tank, external air must be drawn into the tank (referred to as negative pressure). If the operation is halted, the breathing valve automatically closes, preventing any leakage of liquid and gas from the tank, thereby securing the quality of the liquid inside.

◆Breathable Valve Specifications: 
Valve internal parts features: 1. Weighted core design

2. Compact structure, reliable performance, maintenance-free
3. Standard modular design adopted
Structure Types: Single Call, Single Suction, Breathing Valve, Recirculating Breathing Valve with导管
Flow characteristics: Quick opening
Size Range: DN50-300 (2”-12”)
Pressure Class: PN1.6 MPa (ANSI 150LB)
Leak Class: ASME B16.104 VI (Soft Sealed)
Pipe Connection Type: Flanged
Temperature Range: -30° to 60°
Positive Pressure Setting Range: Grade A Positive Pressure 355Pa (36mm water column)

Grade B Positive Pressure 980 Pa (100 mm water column)

C-Grade Positive Pressure 1765 Pa (180 mm water column)

Vacuum Setting Range: 295Pa (30 mm water column)