Balancing valve application knowledge

1, the boiler (or chiller) flow balance In the boiler room (or chiller room), the general installation of several units in parallel, due to the different resistance between the units, causing inconsistencies in the flow through the various units, the unit can not play Installed the maximum output. At this point should be installed in each boiler (or chiller) balance valve, so that each unit can get the design flow, ensure that each unit safe and normal operation. Chiller connected to multiple cooling towers, each cooling tower should also be installed balance valve 2, the thermal station of the first and second loop water flow balance In the thermal power station or centralized boiler room to a number of hot water heating system In order to obtain the required water flow for each thermal station, it is advisable to install a balancing valve on a loop-side return pipe at each thermal station. In order to ensure that the secondary loop water flow is the design flow, the balance valve should also be installed on each secondary loop side of the thermal station. 3, District heating pipe network water flow balance Community heating pipe network often by a boiler room (or heat station) to a number of buildings heating. It consists of a main pipe, several main pipelines and branch pipes connected to the entrance of the building on the main pipelines. Because each building is located at a distance from the heat source, the lack of effective equipment to eliminate residual head pressure in the near-loop will result in a non-compliant flow distribution, overheating at the proximal end, and overcooling at the far end. Balance valves shall be installed at the entrance of each main pipe and each building so as to ensure the balance of traffic between main pipelines and buildings in the district. 4, building heating (cold) pipe network water flow balance For demanding heating (cold) pipe network system, you need to ensure that all the risers (even branch) to achieve the design flow, then in the main pipe, main pipe And standpipe (and branch pipe) should be installed on the balance valve. This article Keywords: balance valve

PVC Edge Banding For Cabinet

The main function of the edge banding is to seal the cross-section of the board, so as to avoid the damage of the board and the adverse factors (mainly moisture) in the process of use and prevent the formaldehyde inside the board from volatilizing, and at the same time achieve the effect of beautiful decoration.

The product has the following main features: smooth surface, no blistering, no ribbing, moderate gloss, smooth surface and back surface, uniform thickness, uniform width, reasonable hardness, high elasticity, good quality, strong wear resistance, trimmed and sealed The color of the side and the side is close to the surface color, not whitish, good gloss, and the overall color of the finished furniture is coordinated.

Judge good or bad
1. Look at the hue and surface roughness of the edge banding strip. The color of the surface of a good edge banding strip is also very important. Whether the color is close to the customized product and is gorgeous. If the surface is very rough and there are pull marks, the quality is definitely not much better. This is the surface quality of the edge banding strip. It has nothing to do with the quality of the inner material of the edge banding, mainly the production process of the edge banding factory and the production technical skills of the employees. A good edge banding strip is: the surface must be smooth, no blistering or seldom bubbling, no drawing or few drawing, moderate gloss, not too shiny or too matte (unless there are special requirements).
2. Check the flatness of the surface and bottom of the edge banding and whether the thickness is uniform, otherwise it will cause the joint between the edge band and the board, the glue line is too eye-catching or the gap between the board and the edge band is too large, which will affect the overall beauty. Details determine success or failure, and often a small detail problem may bring an embarrassing situation where the overall effect is not good.
3. Whether the edge trimming is whitish, whether the surface of the bent edge strip is severely whitish, and whether the ground color of the trimming strip is close to the surface color of the board in question. PVC Edge Banding strips are mainly made of PVC and Calcium Carbonate plus additives. If the calcium carbonate content is too high, whitening of the edge banding and bending will occur, which proves that the quality of such products is not good.
4. Whether the strength is okay and whether there is elasticity. High strength means good wear resistance, and the corresponding quality is better. Too high strength also means increased processing difficulty. Low elasticity means low wear resistance and low aging resistance. In addition, according to actual production needs, manual trimming is generally required, and soft spots can be made appropriately, and the automatic edge banding machine can make hard points appropriately.
5. Whether the adhesive is applied evenly and whether it is easy to fall off during use.
6. Smell whether the PVC edge banding strips taste or not. Products produced with good quality raw materials generally have a small taste. If the taste is too large, it means that the quality of the raw materials used in production is relatively poor.

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