Triple functions air valve type "D" 4000 – 6000 – 9000
Low and high pressure air relief valve (double effect): the device evacuates great air amounts during the filling of the main, allows the inlet of great air amounts (in order to avoid a vacuum effect) during the emptying of the main and evacuates small air amounts that are accumulated in the high points of the main during normal working conditions
Technical design
| 4000 D | Standard | 16 | 40/50/60/65 | 10 - 16 | 185 | 150 | 198 | 275 | 15 | RCA60DSAH |
| 4000 D | Standard | 25 | 40/50 | 10 - 25 | 185 | 150 | 198 | 275 | 15 | RCA50DSDH |
| 4000 D | Standard | 25 | 60 et 65 | 25 | 185 | 150 | 198 | 275 | 15 | RCA60DSDH |
| 6000 D | Standard | 16 | 80 | 10 - 25 | 200 | 220 | 222 | 370 | 25 | RCA80DSAH |
| 6000 D | Standard | 25 | 80 | 10 - 25 | 200 | 220 | 222 | 370 | 25 | RCA80DSDH |
| 9000 D | Standard | 16 | 100 | 10 - 16 | 235 | 270 | 250 | 460 | 38 | RCB10DSAH |
| 9000 D | Standard | 25 | 100 | 25 | 235 | 270 | 250 | 460 | 38 | RCB10DSDH |
| 9000 D | Standard | 16 | 150 | 10 - 16 | 300 | 270 | 250 | 460 | 43 | RCB15DSAH |
| 9000 D | Standard | 25 | 150 | 25 | 300 | 270 | 250 | 460 | 42 | RCB15DSDH |
| 4000 D | Reinforced | 16 | 40. 50. 60 et 65 | 10 - 16 | 185 | 150 | 198 | 275 | 15 | 203997 |
| 4000 D | Reinforced | 25 | 50 | 10 - 25 | 185 | 150 | 198 | 275 | 15 | 234125 |
| 4000 D | Reinforced | 25 | 60 et 65 | 25 | 185 | 150 | 198 | 275 | 15 | * |
| 6000 D | Reinforced | 16 | 80 | 10 - 25 | 200 | 220 | 222 | 370 | 25 | 203998 |
| 6000 D | Reinforced | 25 | 80 | 10 - 25 | 200 | 220 | 222 | 370 | 25 | * |
| 9000 D | Reinforced | 16 | 100 | 10 - 16 | 235 | 270 | 250 | 460 | 38 | 203999 |
| 9000 D | Reinforced | 25 | 100 | 25 | 235 | 270 | 250 | 460 | 38 | 230607 |
| 9000 D | Reinforced | 16 | 150 | 10 - 16 | 300 | 270 | 250 | 460 | 40 | 204000 |
| 9000 D | Reinforced | 25 | 150 | 25 | 300 | 270 | 250 | 460 | 42 | 230426 |
Features
Material and coating
| Item | Quantity | Description | Material | Coating |
|---|---|---|---|---|
| 1 | 1 | Body | Ductile iron FGS 400/15 or 500-7 | Blue epoxy 250 microns |
| 2 | 1 | Upper flange | Ductile iron FGS 400/15 or 500-7 | Blue epoxy 250 microns |
| 3 | 1 | Cover | Ductile iron FGS 400/15 or 500-7 | Blue epoxy 250 microns |
| 4 | 1 | Protection grid | Stainless steel A2 | |
| 5 | 1 | Cover | Stainless steel A2 | |
| 6 | 4 | Threaded bar | Stainless steel A2 | |
| 7 | 8 | Nut | Stainless steel A2 | |
| 8 | 4 | Washer | Stainless steel A2 | |
| 9 | 4 | Screw | Stainless steel A2 | |
| 10 | 4 | Nut | Stainless steel A2 | |
| 11 | 4 | Washer | Stainless steel A2 | |
| 12 | 1 | Float | ABS | |
| 13 | 1 | Float guide | ABS | |
| 14 | 1 | Ring | ABS | |
| 15 | 1 | Gasket seat | ABS | |
| 16 | 1 | Lip seal | EPDM | |
| 17 | 1 | Float | ABS | |
| 18 | 1 | Nozzle | PA6.6 Polyamide | |
| 19 | 1 | Nut | ABS | |
| 20 | 1 | Gasket | EPDM 55 | |
| 21 | 1 | O-ring | EPDM 55 | |
| 22 | 1 | Gasket | EPDM 55 | |
| 23 | 1 | Adjusting screw | Stainless steel A2 | |
| 24 | 1 | Pin | Stainless steel | |
| 25 | 1 | Air valve | Brass |
| Item | Quantity | Description | Material | Coating |
|---|---|---|---|---|
| 1 | 1 | Body | Ductile iron FGS 400/15 or 500-7 | Blue epoxy 300 microns |
| 2 | 1 | Upper flange | Ductile iron FGS 400/15 or 500-7 | Blue epoxy 300 microns |
| 3 | 1 | Cover | Ductile iron FGS 400/15 or 500-7 | Blue epoxy 300 microns |
| 4 | 1 | Protection grid | Stainless steel A4 | |
| 5 | 1 | Cover | Stainless steel A4 | |
| 6 | 4 | Threaded bar | Stainless steel A4 | |
| 7 | 8 | Nut | Stainless steel A4 | |
| 8 | 4 | Washer | Stainless steel A4 | |
| 9 | 4 | Screw | Stainless steel A4 | |
| 10 | 4 | Nut | Stainless steel A4 | |
| 11 | 4 | Washer | Stainless steel A4 | |
| 12 | 1 | Float | ABS | |
| 13 | 1 | Float guide | ABS | |
| 14 | 1 | Ring | ABS | |
| 15 | 1 | Gasket seat | ABS | |
| 16 | 1 | Lip seal | EPDM | |
| 17 | 1 | Float | ABS | |
| 18 | 1 | Nozzle | PA6.6 Polyamide | |
| 19 | 1 | Nut | ABS | |
| 20 | 1 | Gasket | EPDM 55 | |
| 21 | 1 | O-ring | EPDM 55 | |
| 22 | 1 | Gasket | EPDM 55 | |
| 23 | 1 | Adjusting screw | Stainless steel A4 | |
| 24 | 1 | Pin | Stainless steel | |
| 25 | 1 | Air valve | Brass |
Kinetic principle
1- Pipeline filling
- During the filling of the pipe, the air evacuates, the float remains in low position
- The water fills gradually the air relief valve, under the effect of the Archimedes thrust the edge of the seal ring and the surface of the float allows to have a tightness. The flow of the high orifice pressure being far more weak, it remains a air feeder that evacuates slowly and allows a slow placement in pressure of the valve avoiding eater hammer.
- The unit is in under pressure and orifices of evacuation are sealed.
2- Pipeline degassing
- The air accumulates during the functioning of the pipe. The low pressure float remains in place under the effect of the pressure despite the decline of the level of the water. The air evacuates by the small orifice with the same mechanism that the preceding paragraph 2.
3- Pipeline emptying
- In case of emptying of the network or rupture of the pipe, the low pressure float instantaneously allowing the arrival of air and avoiding the placement in depression of the conduct.
Performances
Air flow large orifice
Air flow small orifice
Constant flow from 1 bar (10MCE)
| PFA in Bar (all DN) | 16 | 25 |
|---|---|---|
| Ø nozzle in mm | 2,25 | 1,75 |
| Air flow in m3/h at pipe pressure | 2,79 | 1,69 |
Hydraulic sealing: sealing wraps to 1.5 PN - sealing low pressure starting from 0.3 bars for small (nozzle) and large openings.
Documents
Storage instructions
Handling
The handling of the valve has to be made with care, in order to avoid any shock, even accidental, which could damage it. Ends of the valve body or its flanges should be used for valve lift.
Storage
Generally the valves are supplied with plugs at the extremities, or in pallets banded with plastic film; if the valves are without packing and have to stay for long time in the stock before being installed, they must be stocked covering the passage of the valve, safeguarding in this way the interior parts and particularly the seat from contact with powder or dirt.
The valves must be stored in a location offering a good protection against the direct sun, the rain and all other atmospheric elements. In absence of a right place the valves have to be wrapped with a cellophane or plastic sheet, if possible of dark color.
Accessories and spare kits storage
1- Gasket
Normally the gaskets are made with a rubber quality which is sensitive to the sunlight. Therefore it is usual to store such rubber parts in an area protected from the sunlight, in order to avoid their deterioration. If such conditions are not available, rubber parts should be then at least protected by cellophane or plastic sheets of dark color.
2- Bolts
The requested flange bolting is normally packed in a sack or a box equipped with a tag indicating the number and the type of the packed bolts. It is absolutely necessary to keep them in the original condition of delivery, avoiding putting them in contact with material which could damage them. Generally the bolting is slightly lubricated before delivery; any contact with dirt or dust could, in extreme cases, damage the threads and prevent their future mounting.