FIG. 942 DOUBLE ORIFICE AIR RELEASE VALVE​​

Usage for waste & sewage water.
Double orifice air valve that combines both large orifice & small orifice functions within one unit. The large orifice allows air to be expelled from the system during filling of a pipeline and admit air back into the system whenever sub-atmospheric pressure occurs.
Air is vented from the system until liquid enters the valve and lifts the float on its pivot which lifts the plug against the large orifice seat. Pressure within the body holds the plug firmly against the seat. In the event of sub-atmospheric pressure in the system, the liquid level drops causing the float and plug to lower and allow the admission of air.
During normal working of the main the valve releases the air which accumulates under pressure, without escape of fluid. With the main in operation, the float normally holds the orifice button against its seat.
As air enters the body the fluid level is depressed until a level is reached when the float drops, which allows air to vent through the small orifice. The consequent rise in fluid level returns the float and orifice button to its seat.
Efficient low pressure sealing at 0.2bar.
50mm (2″) – 150mm (6″) sizes.

Suitable for:

Wastewater & Sewage Valves

Valve type:

- Air Release Valves For Wastewater & Sewage

Options

NPT threaded.
Flanged inlet with various drillings.
Screwed outlet facility.
Viton rubber.
Metal float assembly options.
9.5mm orifice size available.
Inflow / outflow check.
Flushing attachment.
Drainage boss.
Isolating gate valve with or without bevel gearbox.
Odour control unit.
25 bar version.

Technical Specification

PART

PARTS

MATERIAL

1

Body

Ductile Iron

2

Cover

Ductile Iron

3

Cage

316 Stainless Steel

4

Seat

316 Stainless Steel

5

Plug

316 Stainless Steel

6

Float

316 Stainless Steel

7

Cover Setscrews

316 Stainless Steel

8

Cover O-Ring

Nitrile Rubber

9

Seat Cover O-Ring

Nitrile Rubber

10

Seat O-Ring

Nitrile Rubber

11

Nut

316 Stainless Steel

12

Lockwasher

316 Stainless Steel

13

Universal Coupling

316 Stainless Steel

14

Spiral Pin

Stainless Steel

15

Float Rod

316 Stainless Steel

16

Orifice Button 3

316 Stainless Steel/Viton

17

Nut, Orifice Button

316 Stainless Steel

18

Lockwasher

316 Stainless Steel

19

Lever Arm 3

316 Stainless Steel

20

Inlet Nipple

Galvanised Malleable Iron

30 Years of GA Valves

Over 30 years of experience in the design and manufacture of engineered valves and ancillary products.Over 30 years of experience in the design and manufacture of engineered valves and ancillary products.Over 30 years of experience in the design and manufacture of engineered valves and ancillary products.Over 30 years of experience in the design and manufacture of engineered valves and ancillary products.Over 30 years of experience in the design and manufacture of engineered valves and ancillary products.Over 30 years of experience in the design and manufacture of engineered valves and ancillary products.

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