Air vent valve, intake/exhaust valve, vent valve/positive pressure reliever for drainage intake/exhaust valve AFV-4N type-AFV-4N-F (nominal diameter 20)

exhaust valve AFV-4N type
Ben Co., Ltd.

About This Product

The intake/exhaust valve sucks in a large amount of air when the water supply piping becomes negative pressure, eliminates the negative pressure, and prevents backflow from the water supply destination. It is ideal for the top of pipe shafts as it automatically exhausts the air in the pipes at all times. In particular, a safe water supply system can be constructed using direct water supply or pressure tank water supply methods.

Nominal diameter 20: Maximum vertical pipe diameter 40, nominal diameter 25: Maximum vertical pipe diameter 50 (Tokyo Metropolitan Bureau of Waterworks maximum vertical pipe diameter 75), one unit eliminates reverse siphon effect.

■Place of use・Direct water supply
・Pressure feeding/pressure tank water supply

■Main features・The amount of air intake is large when negative pressure is generated. (Rapid intake function Note 1.)
・Performs reliable air exhaust operation under pressure. (Pressure exhaust function Note 2.)
・The amount of air discharged during initial water flow is large. (Initial exhaust function)
・No water is discharged during exhaust.
・The intake and exhaust ports rotate 360°.
- Built-in net in the intake section.
- Made of stainless steel, ideal for stainless steel water supply pipes. (AFV-5 type)
・Note 1. There are standards for intake volume.
・Note 2. When using an intake/exhaust valve without a pressure exhaust function, an "air bleed valve" must be installed.

■Water Supply Act performance standards certified registered product (E-244)・Pressure resistance
・Leaching
・Durability

Model
There is 1 model available for this product.

Product
Air vent valve, intake/exhaust valve, vent valve/positive pressure reliever for drainage intake/exhaust valve AFV-4N type

Handling Company
Ben Co., Ltd.

Categories

Valves

Quick Exhaust Valves

Valves

Exhaust Valves

Valves

Exhaust Valves

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Last viewed: 13 hours ago

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1 Models of Air vent valve, intake/exhaust valve, vent valve/positive pressure reliever for drainage intake/exhaust valve AFV-4N type

Image	Part Number	Price (excluding tax)	Valve type	Mounting position	Intake volume (rapid intake type)	Nominal diameter	Material (float)	Material (valve body)	Material (valve seat)	Material (main body)	Fluid temperature	Kinds	End connection	Mass	Applicable pressure	Applicable fluid
	AFV-4N-F (nominal diameter 20)	$ 196.30〜	Intake and exhaust valve	Upright installation within 5° from vertical	・Nominal diameter 20:13 L/s (standard condition) [at valve differential pressure 2.9kPa] ・Nominal diameter 25:16 L/s (standard condition) [at valve differential pressure 2.9kPa]	20･25 (3/4･1)	PP resin	PP resin/CAC/EPDM	PP resin/CAC/EPDM	CAC406	5~40℃	Bronze	・Inlet: JIS R thread ・Intake/exhaust port: JIS Rc1 thread	1.3kg	0.01~1.0MPa (Always ensure the pressure on the inlet side of the valve is 0.01MPa or more.)	Tap water

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