KRRA – Reduced Bore Anti-Shock Combination Air Release Valve
KRRA-Reduced Bore Anti-Shock Combination Air Release Valve
Spec Sheet: KRRA-Reduced Bore Anti-Shock Combination Air Release Valve
Functions:
1. Restricted air release during the filling of the pipeline.
2. Small air release under a pressurized pipeline.
3. Large air intake during draining of the pipeline.
Description
KRRA-Reduced Bore Anti-Shock Combination Air Release Valve
Features:
• Advanced design with a simple mechanism, strong float to prevent cracking during sudden water hammer & quick closure.
• Aerokinetic mechanism to resist blow shut under higher air velocity even up to a sonic air velocity.
• For the potential water hammer location or transmission pipeline, we should use an anti-shock combination air valve to prevent damage or impact of severe water hammer.
• An anti-shock device is installed on top of the bonnet, It will slow down the exhausting air flow out during filling to prevent hammer impact, whenever a vacuum happens, the device will drop down and let Large air into the pipeline.
• There are no arms or levers to prevent vibrating, bending, or direct closure of the float.
• Smooth barrel outside of the float, keep the float moving in the specified guide rail.
• Guide barrel buffer for collision prevention, and drain easily with proper holes around the barrel during vacuum.
• Outside screens will be an option for safety and to prevent insects or birds.
• Fully fusion epoxy coated inside and outside of valve body for long-term services.
• Manufacturing standard meets or exceeds BS EN 1074-4, AWWA C512
• Flange drilling and dimension meets BS EN 1092 BS EN 558 and ANSI flange.
General Application:
For clean water systems, transmission and distribution, and irrigation systems.
Specifications
| Type | Reduced Bore Anti-Shock Combination Air Release Valve (3-Function) |
|---|---|
| DN Range | DN80 to DN300 |
| Pressure Rating | PN10 / PN16 / PN25 |
| Body Material | Ductile Iron EN GJS 500-7 |
| End Connections | Flanged to BS EN 1092 / BS EN 558 / ANSI |
| Standards Compliance | BS EN 1074-4, AWWA C512, BS EN 1092, BS EN 558 |
| Operating Temperature | -10°C to 80°C |
| Note | Consult factory for PN40 and anti-shock device where water hammer is a concern |

