怎么判断橡胶接头的好坏
橡胶接头叫法有很多，有可曲挠橡胶接头，橡胶软接头，橡胶柔性接头，软接头，减振器、管道减震器、避震喉等，是一种高弹性、高气密性，耐介质性和耐气候性的管道接头。
橡胶接头从外形看是由橡胶球与法兰片组成，橡胶接头生产厂家有许多，当然生产出来的质量也有所区别，怎样才能购买到质量好价格优的橡胶接头，就需要您对橡胶接头的产品有充分的了解，这样才能掌握橡胶接头的好坏之分，当然购买了橡胶接头后正确的安装也是起到不小的作用，这些信息，相信您用心了解都会了然于胸的。
如何判断一个橡胶接头的好坏，可以从以下几方面着手：
1、耐介质增重实验：
可以从成品上取样，浸泡在选定的一种或几种介质中，一定温度时间后取称重，根据重量变化率硬度变化率推断材料的种类。比如在100度机油中浸泡24小时，NBR，氟胶，ECO，CR质量及硬度变化率很小，而NR，EPDM，SBR增重一倍以上且硬度变化很大，体积膨胀很明显。
2、热空气老化实验：
从成品中取样，放在老化箱里老化一天，观察老化后的现象。可以分级老化逐步升温。比如150度下CR，NR，SBR都会脆断，NBR EPDM还有弹性。升到180度下普通NBR就会脆断;而230度下HNBR也会脆断，氟胶和硅胶仍然有很好的弹性。
3，燃烧法：
取少许样品，在空气中烧。观察现象。一般来说氟胶，CR，CSM离火自息，即使烧着火苗也比一般NR、EPDM的要小的多。当然，如果仔细观察，燃烧状态、颜色、气味也会提供为我们很多信息。比如NBR/PVC并用胶，有火源时火劈啪的乱溅，似乎有水似的，离火自熄，烟浓且有酸味。需要注意的是有时添加了阻燃剂但不含卤素的胶也会离火自熄，这要借助别的办法进一步推断。
4、测比重：
用电子称或分析天平，**到0.01克的即可，外加一杯水，一根头发丝即可。 一般来说氟胶比重**，1.8以上，CR ECO的也多在1.3以上比重明显偏大的可以考虑是这些胶。
5、低温法：
从成品上取样，用干冰和酒精制造一个合适的低温环境。把样品泡在低温环境下2-5分钟，在选定温度下感觉软硬程度。比如-40度下，同样耐高温耐油很好的硅胶和氟胶对比，硅胶则比较软。
通过以上的方法比对相信你会更轻松的掌握橡胶接头的区分方法，购买了合适的产品，就要正确的使用哟，
This picture and text provided by the Shanghai Songjiang absorber group, is part of the reference rubber shockproof joint http://www.shnxxjjt.com/xjfzjt/ thanks for your reading and support!!!
How to judge the quality of rubber joint
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There are a lot of rubber joint names, there is a flexible rubber joint, soft rubber joints, rubber flexible joint, flexible joint, shock absorber, pipe shock absorber, shockproof throat is a high elasticity, high air tightness, medium resistance and resistance to climate of the pipe joints.
Rubber joint in shape is composed of a rubber ball and a flange piece, rubber connector manufacturer has many, of course, produced quality also differ, how to buy good quality excellent price of rubber joints, you need to your products of rubber joint full understanding, so as to grasp the quality of rubber joints, of course, buy rubber joint after correct installation also played no small role, these information, I believe your intention understanding, will be clear in the chest.
How to judge a rubber joint is good or bad, can begin from the following several aspects:
1, medium weight gain test:
Can be taken from the finished product, soaked in the selected one or several kinds of media, a certain temperature time to take the weight, according to the weight change rate of hardness change rate inferred types of materials. For example, 100 degrees in oil soaked for 24 hours, NBR, fluorine plastic, ECO, CR quality and hardness change rate is very small, and NR, EPDM, SBR weight gain more than double and the hardness varies greatly, the volume expansion is obvious.
2, hot air aging experiment:
Samples from the finished product, put in the aging box aging one day, observing the phenomenon of aging. Can be graded aging gradually warming up. For example, 150 degrees CR, NR, SBR will be brittle, EPDM NBR also have flexibility. Rise to 180 degrees under normal NBR will be brittle fracture; and 230 degrees HNBR will also be brittle, fluorine rubber and silica gel is still very good flexibility.
3, combustion method:
Take a few samples, burn in the air. Observation phenomenon. In general, fluorine rubber, CR, CSM from the fire from burning flames, even than the average NR, EPDM is much smaller. Of course, if you look closely, the state of combustion, the color, the smell will also provide us with a lot of information. For example, NBR/PVC with glue, splashing a fire crackling fire, there seems to be like water, self extinguishing, smoke concentration and acidity. It should be noted that sometimes the flame retardant is added but the halogen free glue will also be extinguished from the fire, which will be further inferred by other means.
4, the proportion of the test:
With the electronic scale or analysis of the balance, accurate to 0.01 grams can be, plus a glass of water, a hair can be. Generally speaking, the largest proportion of fluorine plastic, more than 1.8, ECO CR is also more than 1.3 in the proportion of obvious partial can be considered to be the glue.
5, low temperature method:
Sampling from the finished product, making a suitable low temperature environment with dry ice and alcohol. The samples soaked in low temperature environment 2-5 minutes, the degree of hardness in the selected temperature. For example, -40 degrees, the same high temperature and good oil resistant silicone and fluorine rubber contrast, silicone is relatively soft.
Through the above method than to believe you will be more easily grasp the rubber joints of the distinction method, to buy the right products, it is the right to use yo,