Solenoid valve from 3/4" LFV to 9v. Rain Bird
The solenoid valves of the Rain Bird until a few years ago had a working range that hardly went below 10 lt / min (that is, they opened but could not close properly like many other brands) so below this threshold solenoid valves with flow regulator were used.
The same, goes to act on an internal spring that, crushing, makes the membrane more reactive and therefore makes it close correctly. At this point Rain Bird decided to build a model that would go well even below that hydraulic threshold and so they presented on the market the model (low Flow Valves) LFV 3/4 "that you find at this link (at the end of the article you will find a discount code) is suitable for use on areas with very little water consumption 0.75 l / min.
- 075-LFV: from 0.75 l/min;
- Pressure: from 1 to 10,4 bar (23° C);
- Temperature: up to 43°C
- Height: 11.4 cm
- Length: 11.1 cm
- Width: 8.4 cm
Given its hydraulic peculiarity it is used in very small areas of pots or small flower beds and there is the version with 24 volt solenoid and the version with Bistable solenoid at 9v. .
This second version, if coupled with the BL-IP of Solem or the WooBee always of Solem, becomes a professional solution that can be installed directly without passing new cables or applying it in environments where only the water pipe can be brought.
Its structure is in solid PVC and the pilot flow with double filtering (self-cleaning filter in addition to that of the solenoid) has a manual control ON / OFF that can be carried out in 2 ways:
The first by rotating 1/4" of a turn of the solenoid by discharging the upper water of the membrane internally.
The second through a peg on the upper part of the valve that discharges the upper water of the membrane externally (solution to be used in environments where it can be wet on the ground).
During assembly (as in reality for all solenoid valves) it is important to pay attention to the arrow that indicates the direction of flow, that is, it indicates where the water goes .
The indication of the flow in models with 9 volt solenoid is particularly important because the valve, (normally closed), if it is mounted in reverse remains open and closes when it receives the opening pulse.
The reason for this behavior we understand now .
Being driven by a Bistable solenoid, this has two "stages of stability". Thanks to an electromagnet and a spring inside, at rest it keeps the closing piston outside, keeping the membrane drain hole closed, which is positioned in the appropriate seat of the upper part of the solenoid valve. At the electrical control by the control unit the piston is magnetically attracted inside and opens the circuit by discharging the water that compresses the membrane "keeping it closed" and then wins the force of the pressure by opening the circuit.
A reliable and durable product!
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