To get further information about valves’ installation, operation and maintenance, please contact AB technical department.
Air Valve, Single Chamber, Double Orifice, Triple Function
Product Description:
In this type of valves aeration and air evacuation are carried out automatically in primary and secondary pipelines in sewage networks. These valves are light in weight due to their internal parts being made of plastic and their unique
design and this allows installation in lower altitudes. I have this text from product catalogue.
Product Features:
Triple function: air release during the filling of the pipe system, air release under full operation and full working pressure, venting of air for vacuum breaking purposes.
Automatic air venting of the fluid in the main pipe and supply lines. In these type of valves the fluid flow activates the venting operation. Large venting orifice allows large volumes of air to be released on start-up and enter the pipe for vacuum breaking on shut down. Small venting orifice allows volumes of air to be released under the fluid pressure. Unique feature and internal components of plastic materials result in low weight, allowing easy assembly on lines.
Applications:
This type of valve could be used with sewage mediums at minimum pressure of 0.3 bars to a maximum temperature of 70° C.
Technical Details:
Flanges : DIN-EN-1092-2 (DIN-2501)
Body : EN-GJS-400-15[DIN-EN-1563(DIN-1693)]
Bonnet : EN-GJS-400-15[DIN-EN-1563(DIN-1693)]
Floater : AISI 304 (1.4301)
Stopper : POM
Seat : POM
Guide Rod : AISI 304 (1.4301)
Guide Screw : AISI 304 (1.4301)
Sealing Rubber : NBR / EPDM
Bolts and Nuts : A2 (DIN-912) Medium : potable water, raw water
Temperature : up to 70 °C
Size (mm) : 50 – 200
Pressure (bar) : 6 – 16
Corrosion Protection : All internal components are made of plastic (HDPE 100) and are protected against corrosion. All casting parts are coated with epoxy powder RAL 5005 by electrostatic method.
Air Valve, Single Chamber, for Sewage Application
Product Description:
Product group : Air Valves (AV)،
Fields of application : Wastewater،
Medium : Wastewater، Raw water،
Body : Ductile Cast Iron، Carbon steel, low alloy steel, etc، Nickel Aluminum Bronze، Stainless Steel، Aluminum Bronze ،
Disc :
Sealing : EPDM، NBR،
Temperature °C : Up to 70
Size (mm) : 200 – 50
Pressure (bar) : 16 – 6
Price :
Description :Flanges: DIN EN 1092-2 (DIN 2501)
Automatic Air Venting of the fluid in the main & Supply sewage lines. unique feature & internal components in plastic materials Cause to low weight, these specification let easy assembling on lines.
Corrosion protection:
All internal components were made by plastic (HDPE 100) & are protectable against corrosion.
Coating:
All cast iron parts are covered with electro static epoxy powder coating ( RALL 5005 or 5015).
Applications:
for working pressure of minimum 0.3 bar & Fluid temperature up to 70 (For other conditions on request).
Advantages:
Hydrostatic test Pressure (bar) according to DIN EN 12266-1
Nominal Pressure
PN (bar)Test Pressure, with water (bar)
Seat
Body
10
11
17
16
17.6
25
Double Chamber - Double Orifice Triple Function AV
Product Description:
Double chamber, double orifice air valves combine both large orifice and small orifice functions within one unit. The large orifice allows air to be expelled from the system during the filling of a pipeline and admits air back into the system whenever sub-atmospheric pressure occurs. Air is vented from the system until water enters the valve and lifts the float against its seat, ensuring a tight seal. In the event of sub-atmospheric pressure in the system, the water level drops causing the float to fall from its seat and allows the admission of air.
During normal working of the water pipe line, the small orifice releases the air which accumulates under pressure. With the water pipe line in operation, the float is normally pressed against its seat. As air accumulates in the chamber, the water level subsides and consequently the float drops as well, releasing the air to escape through the small orifice. A subsequent rise in the water level returns the float to its seat.
Product Features:
Triple function: air release during the filling of the pipe system, air release under full operation and full working pressure, venting of air for vacuum breaking purposes.
The material of sealing rubber is made of EPDM or NBR. The bolts are made of either galvanized steel or stainless steel (A2). Internal material parts are made of stainless steel. The design is reliable with a high capacity and small in dimensions.
The air valve, double chamber, double orifice can optionally be produced without an internal shut off valve, once customer requirements demand an external isolating valve under the air valve.
Applications:
Irrigation, industrial applications, water transmission, water treatment, water distribution networks.
Technical Details:
Flange: drilling according to DIN EN 1092-2 (DIN 2501)
Body : stainless steel, nickel aluminium bronze, aluminium bronze, carbon steel, low alloy steel, ductile cast iron
Disc : poly ethylene, stainless steel
Floats : stainless steel
Sealing : EPDM/NBR،
Medium : potable water, raw water
Temperature : Up to 70 °C
Size (mm) : 80 – 250
Pressure (bar) : 10 – 40
Corrosion Protection : All casting parts are coated with epoxy powder RAL 5005 by electrostatic method.
To get further information about valves’ installation, operation and maintenance, please contact AB technical department.
Air Valve, Spring Loaded, Large Orifice
Product Description:
Applications:
This valve is applied to allow large volumes of air into pipelines within water supply networks. The most important function of this valve is its use after an emergency shutdown.
Technical Details:
Product Group : Air Valves (AV)،
Fields of Application : industrial applications, dams, hydropower plants, water distribution networks
Medium : potable water, raw water, sea water
Flange Connection : DIN EN 1092-1 (DIN 2501)
Body : carbon steel, low alloy steel, ductile cast iron, stainless steel
Disc : stainless steel
Sealing : NBR/EPDM
Temperature : Up to 70 °C
Size (mm) : 300 – 1000
Pressure (bar) : 6 – 40
Corrosion Protection : All casting parts are coated with epoxy powder RAL 5005 by electrostatic method.
To get further information about valves’ installation, operation and maintenance, please contact AB technical department.
Large orifice air valves are recommended as part of safety system for large diameter and long pipe lines. Under normal condition (positive pipeline pressure) this air valve is fully closed, it serves as vacuum breaker when the internal pressure in the pipe drops to negative value. For example in case of a pipe burst situation with very rapid medium drainage, a huge volume of air is insert to the pipe through the large orifice of the air valve to prevent damages, caving in, or collapse of the pipes. Once the pressure increases in the pipe line again, the air valve will be closed. A pneumatic damper is located in the valve to adjust the valve’s closing speed in order to avoid damages in the pipe or the valve caused by rapid closing.
To get further information about valves’ installation, operation and maintenance, please contact our technical department.