Solenoid valve 4 inch dc24v main buyer country

If you take a 4-inch solenoid valve for 24V DC, this is already a serious thing, not for greenhouse drip irrigation. Many people think that solenoids are simply “opened and closed”, but here they have a diameter of 100 mm, constant current... In fact, the main mistake is to install such valves without calculating the hydraulics. At Shandong Linyao Intelligent Agriculture Technology LLC, we have had cases when customers from the CIS took valves for sprinklers, and then complained about a drop in pressure. It turned out they forgot aboutinductive loadcoils - when turned off, the reverse current burned out the controllers.

Where is such a valve really needed?

A four-inch solenoid is used for main irrigation lines where the pipe cross-section is from 110 mm. Most often - for large agricultural fields, where irrigation zones are switched by timer. But here it is important: if you put it on water with sand, an ordinary brass core will last a year, no more. In our projects, for example, for drip irrigation of vineyards, we setadditional filters— without this, the valve jams after a couple of cycles.

In terms of voltage: 24V DC is not just “safer than 220V”. On long control lines, say 200–300 meters, the DC current sag less. But if the cable is thin, the voltage drop is already critical. Once a system was installed in Kazakhstan, the valve did not work - it turned out that the controller was producing 24V, but 18V was coming to the coil. I had to pull a reinforced cable or install intermediate relays.

By the way, about the coils. Regular manufacturers make them with a degree of protection IP65 - but this is if the case does not flood. And in field conditions, it happens that the valve is in a pit, it gets flooded with rain... And even with IP65, water seeps through the threaded connections. We now always recommend settingsealed boxes- a trifle, but it saves you from replacing the coil.

What systems does it work with?

Such a valve almost never works alone. Usually this is part of a circuit with frequency converters - for example, when you need to smoothly change the pressure in the line. On our websitelyzhihuinongye.ruthere is a case on irrigation automation for an agricultural holding in the Rostov region: theresolenoid valve 4 inch dc24vcontrolled through a PLC, which received data from humidity sensors. But initially they forgot about the response delay - the valve opened 100% in 2-3 seconds, and the water hammer tore the plastic fittings. I had to register a soft start in the controller.

Another point is compatibility with controllers. The same Hunter and Rain Bird work with 24V AC/DC, but if you have your own controller, you need to make sure that it holds a current of up to 1A. Once they installed a valve with a coil at 0.8A, and the controller was designed for 0.5A - a week later it “died”. Now we always measure currents before installation.

And yes, you shouldn’t skimp on the valve if you have an expensive filtration system. Once a customer bought a cheap valve without protection against water hammer - after operation, the membrane in the disk filter tore every month. As a result, we overpaid for repairs more than we saved.

Features of installation and maintenance

When installing, it is important to place the valve so that the solenoid axis is vertical - otherwise the core may stick. We are inShandong Lingyao Co.,LtdEven in the passports we draw an installation diagram, but some installers still put it “how convenient?” Then they wonder why the valve doesn’t open.

Maintenance - O-rings should be checked once a season. If the water is hard, limescale may appear on the stainless steel rod - it can be easily removed with a brush, but many are lazy. I saw how on one farm the valve stopped closing - it turned out that the rod was “stuck?” due to scale. It's good that the coil didn't burn out.

Another tip: if the valve is located outside, it is better to choose a model with a manual override - sometimes the power goes out and you need to water it. But the manual switch is an unnecessary connection and a potential leak. We usually install valves with the possibility of forced opening through a hexagon - it’s more reliable.

Cases and errors

There was a project in the Krasnodar region - a drip irrigation system for tomatoes. There were 8 four-inch valves, each for its own zone. At first they installed it without check valves - when one opened, other zones sucked in air and the emitters became clogged. I had to redo it, putspring check valvesafter each solenoid.

Another story is when the customer bought the valves himself, and we were just designing the automation. It turned out that their coils are 24V AC, not DC. We had to change the power supplies - it’s good that we noticed it in time. Now we always specify the type of voltage in the specification.

Here's a positive example: last year they made a smart park in Tatarstan - there the valves were controlled via GSM. The connection is stable, but in winter at -30°C the coils failed. We solved the problem with heating - we installed a thermostat and heating cables. Since then, we have installed heating on all objects in cold regions.

What's the result?

A four-inch 24V DC solenoid is not something you can “set and forget”. It requires hydraulic calculations, proper controller selection, and protection from common field problems. BShandong Linyao Intelligent Agriculture Technology Co.,LtdWe generally recommend it for large area zonal irrigation projects - but only after a water analysis and control scheme.

If you take it for yourself, look at the case material (brass or stainless steel), the type of coil (pulse or DC) and the availability of certificates. And don't skimp on little things like fittings or backflow protection - they can save the entire system.

By the way, on our website we have calculation tables for selecting valves - you can ask our managers. But keep in mind: there are no universal solutions, each project is a separate calculation. And yes, the solenoid is only part of the system; without good automation and filtration it will not reveal its potential.