Teach you how to correctly choose stainless steel pressure water tank
At present, the popular water tank in the market has two heat transfer structure methods: water circulation type and coil type. Each method has its own advantages and disadvantages. Stainless steel pressure water tanks are hygienic, non-toxic, and have strong corrosion resistance. The water quality is clean at all times, the sealing performance is good, and there is no leakage. Therefore, most manufacturers still choose stainless steel as the pressure tank liner. However, there are many types of stainless steel. , The price and performance of different types of stainless steel vary greatly.
Water tank classification
1. Water circulation type
The advantages are fast heating (dynamic heating), stable performance, long service life, and good safety. It is more and more favored by the market and has a broad market development prospect.
2. Coil type
The advantage is that the product heats up quickly and the heat exchange time is short.
The true status of the quality of pressurized water tanks
As market competition intensifies, the price of 304 stainless steel fluctuates. In this case, no matter what kind of heat transfer structure of the water tank is adopted, the key guarantee for the quality of the water tank is that the capacity of the water tank is sufficient, the material used is sufficient, and the material used is guaranteed. In order to save production costs, some water tank manufacturers adopt countermeasures or means of “degrading quality without lowering prices” to produce water tanks for the market.
1. The thickness of the inner tank
A good water tank has sufficient capacity and sufficient materials. The thickness of the inner tank is between 0.90-1.95mm, and the quality is guaranteed. For water tank products with “degraded quality without price reduction”, the inner tank should use 0.90-1.0mm, which is actually 0.75mm; should use 1.3-1.5mm, which is actually 1.15mm; should use 1.7-1.91mm, which is actually 1.45 mm. The cost advantage is obvious, and the quality is of course different. Companies that purchase water tanks can weigh and compare water tanks of the same material, or dissect water tanks for comprehensive water tank inspection, analysis and comparison.
2. The material of the inner tank
As you all know, there are many types of stainless steel materials, including 316#, 304#, 301#, 202#, 201#, 200#, 430#, 444#, etc. The quality of different types of stainless steel such as corrosion resistance varies greatly. Of course, Prices also vary greatly, ranging from several thousand yuan to over ten thousand yuan per ton of different types of stainless steel. After replacing the 304# stainless steel with lower-priced stainless steel to produce water tank products, laymen generally can’t tell the difference. However, after the product was used for a period of time, the problem came out. The water tank was corroded and leaked due to material problems, which brought unnecessary losses to the user and, in turn, brought considerable adverse effects to the sales unit.
3. The actual volume of the water tank
Because the inner tank of the water tank is in the middle of the tank, the user cannot see it directly. This provides an opportunity for some water tank manufacturers. The actual volume of the inner tank is much smaller than the standard size. In this way, the purpose of using fewer materials has been achieved. The normal volume should not be less than 90% of the market value.
4. Thermal insulation material problem
The material of the insulation layer has a lot to do with the length of the insulation time. The cooling of the water tank is controlled at 5-7℃ within 24 hours at room temperature as the standard. The water tank insulation materials used by different manufacturers are also different. Some use lower-density insulation materials, which makes it difficult to guarantee the insulation effect, which virtually increases the energy consumption of the heat pump water heater.
5. Water tank shell material problem
The water tank shell and the bottom end cover are made of thin materials, and even some water tank products do not need the bottom end cover at all. In addition to affecting the appearance of the tank, the water tank is prone to rust, and the product is also prone to damage during transportation, and it will also shorten the service life of the water tank.
Coil type water tank, the material selection problem of the coil
There are currently two types of coils, one is copper coils and the other is stainless steel coils. Which kind of material coil is good? Can’t say for now. The reason is that the copper coil is easy to causes leakage because the copper tube is too thin, and the copper coil it easy to form potential corrosion at the welding place of the stainless steel liner. The stainless steel coil tube is trusted by the majority of users because of its good sealing performance and strong corrosion resistance.