1、若是膨脹罐是放在特殊場合，應告知供應商，以便有相關的膜體對應使用。
2、膨脹罐的工質介質一般為水或者水和防凍液的混合物（水的比例不得小于50%），其他介質需要打電話咨詢。
3、應嚴格按公式來計算所需膨脹罐的大小，膨脹罐過小會引起安全閥的頻繁起跳和自動補水閥的頻繁補水。
4、膨脹罐的最大工作壓力跟其罐體上標注的預充壓力一一對應，如果因使用需要改變了其預充壓力，最大工作壓力隨之改變，基本遵循以下規律，預充壓力減小，其最大工作壓力隨之減小，具體減小到多少要計算，預充壓力增大其最大工作壓力不變。
5、測試膨脹罐氣(qi)囊時建議直(zhi)接用水(shui)壓測試，嚴禁使(shi)用鋒(feng)利(li)的器件碰觸氣(qi)囊。
膨(peng)脹罐在系統中的作用可歸納為兩點：
容水(shui)(shui)作用，也可稱(cheng)為當(dang)系(xi)(xi)統(tong)(tong)(tong)的水(shui)(shui)容量(liang)調節(jie)器(qi)。系(xi)(xi)統(tong)(tong)(tong)升(sheng)溫時(shi)，水(shui)(shui)箱從系(xi)(xi)統(tong)(tong)(tong)吸納因熱膨脹而多余的水(shui)(shui)；系(xi)(xi)統(tong)(tong)(tong)降溫和(he)滲漏時(shi)，向(xiang)系(xi)(xi)統(tong)(tong)(tong)補充水(shui)(shui)。
定(ding)壓(ya)作(zuo)(zuo)用，膨脹罐(guan)（水(shui)箱(xiang)）與系(xi)統(tong)(tong)(tong)相(xiang)連的點，常(chang)作(zuo)(zuo)為系(xi)統(tong)(tong)(tong)的定(ding)壓(ya)點或恒壓(ya)點，進而可(ke)保(bao)(bao)證(zheng)系(xi)統(tong)(tong)(tong)保(bao)(bao)證(zheng)系(xi)統(tong)(tong)(tong)不倒(dao)空、不溢水(shui)、不超壓(ya)。膨脹罐(guan)（水(shui)箱(xiang)）常(chang)連接(jie)于(yu)水(shui)泵(beng)的入(ru)口處(chu)，通過(guo)膨脹罐(guan)（水(shui)箱(xiang)）的定(ding)壓(ya)作(zuo)(zuo)用，對水(shui)泵(beng)起到一定(ding)保(bao)(bao)護作(zuo)(zuo)用。
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