The manufacturer of fluororubber sealing ring is Shenzhen Aofute Rubber Products Co., Ltd. Shenzhen Aofute Rubber Products Co., Ltd. is a processing enterprise dedicated to the development, design and production of molded rubber parts and extruded rubber parts, mainly engaged in O-rings (American standard, European standard, Japanese standard, national standard and non-standard) of rubber materials such as Ding Qing rubber, EPDM rubber, silicone rubber and fluororubber. Characteristics of fluororubber sealing ring High temperature resistant fluororubber sealing ring is a sealing ring made of high temperature resistant fluororubber. The general fluororubber sealing ring can resist high temperature up to 200 degrees, and it can reach 250 degrees after special formula treatment. Product models include high-temperature fluororubber ring, high-temperature fluororubber O-ring, high-temperature fluororubber U-ring, high-temperature fluororubber V-ring and high-temperature fluororubber rectangular sealing ring. Fluorine rubber has high chemical stability, high temperature resistance and aging resistance, and is one of all elastomers with good medium resistance at present. Like silicone rubber, fluororubber is the best elastomer at present, which can be used at 250℃ and 300℃ for a short time. The heat resistance of fluororubber is better than that of 26-4 1.2. Illumination: Sweet potatoes like light. In the case of sufficient light, the leaves are thicker and longer, the stems and vines are strong, the conductive tissues of the stems are developed, and the yield is higher. When the light is insufficient, the leaves will turn yellow, with many fallen leaves, short leaf age, slender stems and vines, underdeveloped transportation organization, less transportation of organic nutrients assimilated into root tubers and low yield. 3. Moisture: Sweet potato is a drought-tolerant crop, but too much and too little moisture is not conducive to increasing production. Sweet potato is afraid of flooding, especially after it comes out, which has a great influence on yield. The uneven growth rate inside and outside the roots caused by the uncertainty of soil moisture often leads to cracking of the epidermis. In short, sweet potatoes are afraid of both waterlogging and drought. The masses said, "dry roots are long, wet roots are long, and dry roots are long." "In order to obtain high yield of sweet potato, we should irrigate it properly and timely according to the specific situation, drain it thoroughly in time, and strengthen soil and water conservation in intertillage and dry land. 4. Nutrients: Sweet potato has strong fertilizer absorption ability and is barren-tolerant, but sufficient fertilizer must be applied for high yield. Besides nitrogen, phosphorus and potassium, sulfur, iron, magnesium and calcium also play an important role. Among the three elements, sweet potato has the largest demand for potassium, followed by nitrogen and phosphorus. According to the analysis, per 1000 kg sweet potato contains 3.5 kg nitrogen, 5.6 kg phosphorus 1.75 kg potassium. Therefore, increasing potassium fertilizer and timely and appropriate application of nitrogen and phosphorus fertilizer can significantly increase production. 5. Soil: Sandy loam and sandy soil with rich organic matter and good ventilation and drainage are the best. When the soil is sticky, the root bark is rotten and rough, the potato shape is irregular, the yield is low, and it is not resistant to storage. However, sandy loam and sandy soil generally have low fertility and poor water holding capacity, so measures such as fertilization should be taken to gradually improve soil fertility in order to obtain high yield. Sweet potato is acid and alkali resistant, and its PH value is about 4.5~8.5, but 5.2~6.7 is suitable. When the soil salt content exceeds 0.2%, sweet potato is not suitable for planting.