Iron Curtain Flow Diagrams - Hellenbrand Iron curtain system 2.0 Owner's Manual

Solenoid
Valve
Timer
Aeration Tank
Solenoid
Valve
Timer
Aeration Tank
U.S. Patent #B 5,096,596
Patent Pending
2

IRON CURTAIN FLOW DIAGRAMS

Shuttle
Valve
Step 2.
Aeration Operation Air Recharge Cycle
When energized, the air pump sends air through the solenoid valve into one end of the shuttle valve.
Once air pressure in the shuttle valve is greater than the water supply pressure at the other end of the
Shuttle
Valve shuttle valve, the piston shifts to the open position. In the open position, the bleed‑off port discharges
excess water and old air to the drain port through a flow restrictor. Simultaneously, the air inlet port
opens to provide a direct connection between the air pump and the top of the aeration tank. The air
pump runs for a preset period of time recharging the head of air in the aeration tank.
Air Recharge Shut Off
The timer turns power off to the air pump and the solenoid valve at the end of the recharge cycle. The
solenoid valve then closes the port between the air pump and the shuttle valve. The port between the
shuttle valve and the atmosphere opens and releases air pressure. This allows water pressure to shift
the piston to the closed position. With the piston in the closed position, the air recharge inlet port is
closed and direct communication between the bleed off tube and the drain port is also closed.
Timer Operation
A timer controls the air recharge cycle and how frequently it occurs. The timer simultaneously ener‑
gizes the air pump and the solenoid valve. After a preset amount of time, the timer shuts off the air
pump and de‑energizes the solenoid valve.
Solenoid Valve Operation
The solenoid valve is a three‑way valve having ports that connect to the air pump, shuttle valve and
the atmosphere. In the service cycle, the solenoid valve is de‑energized and closes the port to the
air pump, providing a positive shut‑off to the pump. This prevents water from backing up into the air
pump and damaging the pump. In the air recharge cycle, the solenoid valve closes the port to the
atmosphere and opens the port from the air pump.
Shuttle Valve Operation
In the service position, water pressure holds the shuttle valve piston in the closed position, trapping
the airhead in the aeration tank and closes the air recharge inlet port and drain port. During air re‑
charge cycle, air pressure is greater than the water pressure and forces the shuttle valve piston in the
open piston. The shuttle valve has an internal pressure relief valve that relieves high pressure that
may build up in the aeration tank. This precautionary function protects components from failure due
Step 1.
Aeration Operation Service Cycle
In the service cycle, raw water enters the
inlet port of the aeration tank and is directed
through the inlet diffuser. The oxidation pro‑
cess begins when the water passes through
the inlet diffuser and cascades through a head
of air. This air/water contact oxidizes the iron,
manganese, hydrogen sulfide in the water. The
water is directed toward the bottom of the tank
and travels through the pick‑up tube. It then
passes through the outlet of the aeration tank
to the inlet of the filter tank.
Filter Tank Operation Service Cycle
Raw water enters the filter tank through the inlet
port of the filter control valve. Upon system
demand for filtered water, water is directed to
the top of the tank and flows downward through
the multimedia filter bed toward the lower dis‑
tributor. Oxidized iron particles are trapped
by the filter bed as the water passes through.
Filtered water enters the lower distributor and
travels up the distributor tube to the outlet port
on the filter valve.
U.S. Patent #B 5,096,596
Patent Pending