Disk valve pa dn100 wafer design

When you hear aboutbutterfly valve pa dn100 wafer design, the first thing that comes to mind is a seemingly simple knot, but there are so many pitfalls that pop up on objects. Many people mistakenly believe that it is enough to select the diameter and pressure, but in fact, even the thickness of the gaskets or the steel grade of the bolts can cause a leak after six months of operation.

Design features and typical selection errors

In our project for greenhouses in the Krasnodar Territory we usedWafer disc valves dn100from a Chinese supplier. At first we were happy with the price, but during installation it turned out that the mounting holes for the bolts were shifted by 2 mm relative to GOST - we had to urgently order adapter plates. This is the case when a savings of 15% resulted in two weeks of downtime for installers.

By the way, about seals: for agricultural projects where fertilizers are used, it is better to immediately install EPDM rubber rather than standard NBR. I remember inShandong Linyao Intelligent Agriculture Technology Co.,Ltdon the website https://www.lyzhihuinongye.ru they mention that for their fertigation systems they use modified valves with a reinforced shaft - this is precisely because of the aggressive environment.

Another nuance is the direction of flow. Some manufacturers skimp on markings, and then when installed in the filtration system, the disk works 'tear-off'. You have to additionally install arrow stickers, although according to the standards this should be cast on the body.

Installation practice in irrigation systems

When developing smart fields near Voronezh, we installedWafer valves dn100in areas with elevation differences. EngineersShandong Lingyao Co.,Ltdthen they advised adding support brackets - and for good reason: without them, vibration from the pumps within six months loosened the fastenings on three units.

An interesting case was with automation: when we connected the remote control, it turned out that standard electric drives are not compatible with the levers on some shutter models. We had to mill the seats - now, by the way, in new projects we immediately install valves with a unified fastening for the drives.

I can tell you from experience that for dn100 it is critical to check the disc runout after installation. Even 1.5 mm of play when working with fertilizer suspensions leads to erosion of the seat within a season. It is better to immediately take models with a test fitting for diagnostics.

Compatible with filtration equipment

In integrated water-fertilizer systemsWafer disc valveoften becomes a weak link. Especially in areas after sand filters, abrasive microparticles settle in the gaps, and if the manufacturer skimped on anti-corrosion treatment of the shaft, after a year it jams.

Last year we just forShandong Linyao Intelligent Agriculture Technology Co.,Ltdtested a series of valves with Teflon-coated discs. The results were surprising: when working with phosphate fertilizers, wear decreased by 40%, but the cost of repairs increased due to the complexity of replacing the seat.

I remembered for the future: for dn100 in the wafer design, it is imperative to leave a technical gap of at least 80 mm on the drive side. In the project near Stavropol, due to the inattention of the designers, the mounting of the electric drive had to be redone - they did not take into account the dimensions of the servo drive.

Maintainability in the field

The most painful issue is replacing seals without dismantling the entire line. In modernbutterfly valves dn100Many manufacturers have switched to a cartridge system, but in practice this only works with ideal water treatment. On our farm near Rostov, after two years of operation, 60% of these cartridges did not fail, but they still had to be replaced due to deformation of the housing due to temperature changes.

Life hack from installers: if there are no original gaskets, reinforced silicone 2 mm thick is suitable for temporary repairs. But only in cold water - when in contact with heated fertilizers, the material tans within a week.

By the way, in the documentationShandong Lingyao Co.,LtdThey point out correctly - for systems with frequency regulation, valves with a reinforced shaft are needed. We stepped on this rake at one time: standard shafts burst when a pump with a frequency converter suddenly started.

Economic aspects of operation

When you consider the cost of ownership, it's cheapWafer valve dn100may be more expensive than its European counterpart. In our case, the Chinese model for 12 thousand rubles required replacement of seals every 8 months, and the Italian one for 28 thousand has been working for the third year without intervention.

But there is a nuance - for seasonal systems, for example in greenhouse complexes, it is sometimes more profitable to install simpler versions. Especially if the line is washed for the winter - then there is enough resource for 5-7 seasons.

In new projectsShandong Linyao Intelligent Agriculture Technology Co.,Ltdis currently implementing a wear forecasting system based on data analysis from pressure sensors. For dn100 this is especially true - the cost of sudden downtime of one line reaches 300 thousand rubles per day.

Prospects for modernization

Now I’m looking at shutters with disk position sensors - this is a breakthrough for automation. Tested at pilot site last monthShandong Lingyao Co.,Ltd— the accuracy of flow control has increased by 18%, but it is still too expensive for mass implementation.

Among the new products, models are beginning to appear with the ability to replace the saddle without removing it from the line. For the dn100 this is especially valuable given the weight of the structure (about 35 kg). True, the cost of such solutions still bites.

Based on the experience of recent projects, I can say that the future lies in hybrid solutions. For example,butterfly valve pa dn100 wafer designwith polymer coating + remote monitoring system. This is exactly what is offered in modern turnkey agricultural complexes.