Solenoid valve 1.5 inch pulse main buyer country

When you hear about one and a half inch pulse solenoid valves, the first thing that comes to mind is drip irrigation. But in reality, 80% of buyers take them to automate industrial greenhouses, and here nuances begin that are not written about in textbooks.

Why exactly 1.5 inches?

Look here: for standard drip lines, 1-inch valves are often used, but when it comes to sections with height differences or branch lengths over 100 meters, 1.5 inches becomes a lifesaver. The pressure stabilizes, and water hammers are less frequent. Although I remember one client in the Krasnodar region stubbornly installed inch ones - then for three months they dealt with the airing of the lines.

The pulse principle is not just to save energy. In the same projectsShandong Linyao Intelligent Agriculture Technology Co.,LtdSuch valves are often combined with frequency pumps, resulting in smooth flow control without pressure surges. By the way, their websitelyzhihuinongye.ruI’ve posted a good integration scheme with weather stations, but there is a point: at frosts below -15°C, additional heating of the coil is needed, otherwise the impulse will be lost.

The main purchases come from the southern regions - Crimea, Stavropol, Rostov region. Where they switch to smart irrigation in large agricultural complexes. But there are also pitfalls: last season, a batch of valves from another supplier began to “stick?” after a month of working with hard water. We looked into it and it turned out that the seal material was not designed for high salt content.

Installation errors

The most common problem is installation without mudguards. It seems like a small thing, but even in systems with fine filtration, rust particles from the main pipes can kill the plunger within a year. Especially if the water is supplied from artesian wells.

Another point: many people forget about the shut-off valves before and after the valve. And when repairs are needed, the entire branch has to be drained. In projectsintelligent water and fertilizer integration equipmentwe always install bypass lines - clients are initially indignant at the cost, but after the first season they say thank you.

I have seen cases where valves were placed directly under the scorching sun without covers. Ultraviolet radiation “ate up” in two seasons. plastic case - microcracks appeared. Now I recommend only UV-stabilized polymers, even if it is 15-20% more expensive.

What to combine with in automation systems

If we take ready-made solutions - for example, kits fromShandong Lingyao Co.,Ltd, there is usually a connection with LC-4 series controllers. But for large areas it is better to purchase a dry-running pressure switch. Otherwise, when the water is turned off, the valve may remain in the open position and burn the coil.

There was an interesting case last year in a greenhouse near Voronezh: they used 1.5-inch pulse valves for zonal fertilization. But they did not take into account that the length of impulse wires of more than 50 meters causes a voltage drop. I had to install intermediate signal amplifiers.

We are currently testing a scheme where several valves operate in a cascade for sequential watering of long beds. It works well, but requires precise timing adjustments. If you pause less than 3 seconds between switches, back pressure occurs.

About field service

No one believes it until they experience it: the usual cobwebs in the coil vents can lead to overheating. Especially in steppe zones, where there are many small insects. Once a month you need to blow it out - it’s easier than changing a burnt out winding.

More from practice: when connecting to Chinese controllers, sometimes they are not friendly? protocols. The connector seems to fit, but the valve only opens once. Now we always test compatibility before shipping - we saved a lot of nerves for our clients.

Winter preservation is a separate issue. If you do not blow out the valve with a compressor, the remaining water will rupture the housing when it freezes. Two years ago, 12 pieces were lost on a farm near Volgograd. Although everything is written in the instructions - people save money on an air compressor.

What's in the future

Now I see a trend towards switching to valves with feedback sensors. More expensive, but the controller “sees” whether the valve is actually closed. This is especially true for systems with water recirculation - where any synchronization failure is expensive.

From the new products -Shandong Linyao Intelligent Agriculture Technology Co.,Ltdannounced a version with water hammer protection for hilly terrain. It’s interesting how they will solve the problem with flow inertia - if you believe the description, there is an EPDM damping membrane.

By the way, from experience: 1.5-inch valves need repairs less often than inch valves. Apparently, due to less load on the spring mechanism. But these are still subjective observations - we need three more seasons for statistics.