WRAS NSF 61 Combination Air Release Valve
Fire Fighting System Combination Air Valve SS304/SS316 Internal Parts
Conbination Air Release Valve Fire Fighting For Clean Water Full Flow Area
Triple Function:
1. Large air release during filling of the pipeline
2. Large air intake during draining of the pipeline
3. Small air release under pressurized pipeline
Features:
. Advanced design: Strong float and simple mechanism can prevent cracking during sudden water hammer& quick closure.
. No arms or levers that can prevent vibrating, bending, direct closure of the fl oat.
. Smooth cage outside of the float, keep float moving in specifi ed guide rail.
. Bottom rubber buffer for collision prevention, and drain easy with proper holes around the cage during vacuum.
. Outside screen is for safety and prevent insects in.
. Fully fusion epoxy coated inside and outside of valve body for long term services.
. Flange drilling and dimension comply with : BS EN 1092 and BS EN 558 and ANSI flange.
Size Selection Table:
| Water flow rate range Max CMH |
760 | 1360 | 4160 | 8500 | 19100 | 33400 | 76300 |
| Main pipeline size mm |
80-300 | 200-400 | 400-700 | 750-1000 | 1050-1500 | 1500-2000 | 2100-3000 |
| Inlet size of KARX mm |
25 | 50 | 80 | 100 | 150 | 200 | 300 |
| bore of outlet mm |
50 | 75 | 95 | 130 | 170 | 230 | 330 |
| small orifice size mm |
1.6 | 1.6 | 2 | 2.5 | 3 | 4 | 4 |
Service Fields:
Size range:DN 25-300MM
Pressure ratings:1.0Mpa, 1.6Mpa(Thread)
For water system, fire fighting, irrigation system.
Technical Data:
1.0Mpa,1.6Mp,2.5 Mpa(Flange)
Working temperature: -10°-80°C.
Flow media: clean water
Material List:
KARS ( Thread Type DN25-DN50)
| No. | Part Name | Material | Standard |
| 1 | Body | Ductile Iron | EN GJS500-7 |
| 2 | Float | Stainless Steel | ANSI304 |
| 3 | Sealing Arc | Stainless Steel | ANSI304 |
| 4 | Hex Bolt | Carbon Steel/Stainless Steel | Zinc Coated/AISI304 |
| 5 | Cover | Carbon Steel | Epoxy Coated |
| 6 | Screen | Stainless Steel | ANSI304 |
| 7 | Buffer | Rubber | NBR/EPDM |
| 8 | Guide Barrel | Stainless Steel | ANSI304 |
| 9 | Nozzel Seat | Rubber | NBR/EPDM |
| 10 | Seat | Rubber | NBR/EPDM |
| 11 | O-ring | Rubber | NBR/EPDM |
| 12 | Bonnet | Ductile Iron | EN GJS500-7 |
| 13 | Pillar | Aluminum | Commercial |
| 14 | Hex Bolt | Carbon Steel/Stainless Steel | Zinc Coated/AISI304 |
| 15 | Washer | Stainless Steel | AISI304 |
| 16 | Small Nozzel | Stainless Steel | AISI304 |
KARX ( Flange Type DN50-DN300)
Dimension:
KARS ( Thread Type DN25-DN50)
KARX ( Flange Type DN50-DN300)
Air Flow Characteristic
Large Air Exhausting
Air Intake
Small air venting
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