how to use:
Throughout your irrigation system to keep it performing well. Will also help prevent your system blowing up or imploding (both not very good things)
Vacuum breakers:
DISCHARGE LARGE AMOUNTS OF AIR AT SYSTEM START-UP AND RE-ADMIT AIR DURING SHUT DOWN
Where to use :
Use throughout your irrigation system to allow large amounts of air in and out of the system at start-up and shut-down. Helps prevent water hammer and your pipe imploding at shut-down.
How they operate:
A float seals the valve when under water pressure. In the absence of pressure, the seal opens allowing air to flow freely
Tell me more:
Provides drip-tight sealing at low pressures
Continuous / auto air valves
RELEASE AIR DURING SYSTEM OPERATION WHILE UNDER PRESSURE, HELPING KEEP AIR OUT OF YOUR PIPES
when to use:
Throughout your irrigation system to allow small amounts of air to expel while under pressure. The key difference between these and vacuum breakers is that they work when the system is on and discharge only small amounts of air
how they operate:
A rolling seal mechanism allows small amounts of air to expel. Once a specified amount of air builds up, the air pushes down the rolling seal, allowing it to escape
         
Combination air valves
WHEN THE POWERS OF VACUUM BREAKERS AND AUTOMATIC AIR VALVES COMBINE, YOU GET THE COMBINATION AIR VALVE. BEST OF BOTH IN ONE
when to use:
Think of it as the best of automatic and vacuum breakers. These combination valves will emit/discharge large amounts of air at start-up/shut-down, while also allowing the discharge of air while under the pressure
how they operate:
A rolling seal mechanism allows small amounts of air to expel. Once a specified amount of air builds up, the air pushes down the rolling seal, allowing it to escape
tell me more:
You can choose the industry staple ARI DG-10/D-040 Barak air valves or the new advanced Rivulis combination air valve
  
  
  
Check Valves
NON-RETURN / ONE DIRECTION VALVES. STOP WATER GOING BACK TO THE SOURCE
when to use:
Think of these valves as one-way signs. They will allow water to pass in one direction, but not flow the other. Quite a handy device so your irrigation system doesn’t drain out
How they operate:
Inside the valve there are two semi-circle discs that are spring loaded. These discs will open in one direction but will close when pressure falls below a specified amount. When this pressure falls, a seal is created preventing the reverse flow of water
Tell me more:
We offer check valves with and without limit switches. However, for most applications we would recommend having a limit switch
  
