Gutter selection& Suggestion
The selection of the greenhouse gutter is a very important part of the greenhouse planting system design and is often overlooked by many customers because the type of planting gutter is determined by the crop you are growing and the planting gutter has a great influence on controlling the total cost of the planting system inside the greenhouse.
Steel gutter or others ?
In terms of material, we usually divide the greenhouse planting gutters into two main categories.
The first type is the steel rolled continuous greenhouse steel planting gutter, which are usually made of high performance steel with anti-corrosion coating like PE, HDP, and PVDF. They are produced inside the greenhouse by continuous greenhouse gutter rolling machine, their length is infinitely long and can largely improve the overall coordination of the project, but the disadvantage is that they are relatively expensive. So in China always they are using in big projects.
The other is PVC planting gutter, whose biggest point is that it is very malleable and relatively inexpensive. The main disadvantage of PVC planting gutter is that the length with great limitation, usually can only be made into a fixed length. Then transported to the project site to do the overall installation, the process is time-consuming and laborious. Also, in these several years after Covid-19, as the price of oil has increased, the price of PVC raw materials has also begun to rise significantly.And in the long run, the service life of PVC troughs is far less than that of steel troughs.
What gutter section is best?
First, different crops using specific gutter to grow because different crops have different growing weights, and even different growing periods of the same crop also press different weights on the gutter, so it is necessary to ensure that the cultivate gutter structure is stable and reliable, and the strength is sufficient to support the crops.
The second point to consider is the way of gutter fixing, especially when using a hanging gutter system, some greenhouses design of 5000mm section, so it is necessary to choose the right type and right thickness of gutter. When using ground bracket to support the gutters, there is more space to choose the tight thickness and type of gutters.
The third point is to consider whether the drainage performance of the gutter is suitable. Usually, when the length of a single gutter row is too long (usually more than 30 meters), we recommend that you choose gutter type of external drainage to ensure more drainage space and capacity for water and fertilizer liquid recycling. For small greenhouses, common tanks can be using well. These gutters with internal drainage do not have water leaving problems and can save the total cost of the planting system in the project.
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What gutter raw material is best ?
The raw material of the greenhouse gutter is a very important part of the cultivation system, because it directly affects the total life of the cultivation system, but the price of raw materials also big different, how to choose the right raw material of the cultivation gutter. First of all, you need to understand the composition of the raw material of the cultivation tank.
Usually, the most direct impact on the life of the hanging gutter is the coating on the surface the surface coating of the cultivation gutter is mainly PE, HDP and PVDF. the surface coating of the greenhouse gutter directly affects the corrosion and aesthetics of the gutter, but its impact on the grow gutter is not decisive, because there is a primer layer below the coating, and a galvanized layer below the primer.
The thickness of the galvanized layer is the second most important factor affecting the life of the cultivation gutter, which is often overlooked by many customers when choosing materials. Usually, when choosing the raw material for the planting gutters, the thickness of the zinc layer should not be less than 100 g/㎡, and it is definitely better if you can choose more than 150 g/㎡.
All in all, the choice of the raw material of greenhouse planting gutter is very important, both in terms of quality and overall cost. If you have questions about choosing materials, please feel free to contact us.