Pressure Reducing
Pressure Sustaining / Pressure Relief
Flow Control valves
Float Valves - Level Control
Electrically Actuated Valves
Pressure Modulation - Remote Control
Altitude Valves - Level Control
Burst Control Valves
Pump Control
CLA-VAL "HYTROL" Main Valve
Valve Controllers and Data Loggers
Air Valves
The “always on” controlled air release function of the Vent-A-Riser dampens the impact of potentially destructive water hammer in the event of uncontrolled pump start-up and prevents vacuum forming in the riser when the pump stops and the riser drains.
How do I size a Vent-A-Riser surge arrestor
No need, the standard 1” model will protect risers up to 200mm (8”).
I don't have a drain available for the Vent-A-Riser. Can I still use it?
Yes - but only under specific operating conditions, speak to a member of the CLA-VAL Sales team for details.
I don't have a drain point - do I leave the 'Tee' Cap on?
No - you must ALWAYS remove the cap.
What the maximum operating pressure of a Vent-A-Riser
The valve is rated to 25 bar and can withstand surge pressures up to 40 bar.
