Flapper Valves Manufacturers

Flapper valve also called as flutter valve is typically used as an exhaust valve in the double-hose regulator. A flapper valve is simply a soft rubber tube collapsed at one end; when ambient water pressure is greater than the air pressure within the valve, the valve remains in the collapsed conditions. During exhalation, however, the increase in pressure above ambient pressure forces the flapper open, allowing the gas to escape. Water cannot enter the valve while the higher pressure gas escapes and when the pressure equalizes, the flapper returns to relaxed or closed position.