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一般石棉制品和塑料填料垫片的密封,无法满足小氮肥厂生产的要求。1979年我厂因泄漏损失氨10%,其中2GC-5×4铝镁合金泵,用油浸石棉盘根做填料,每天至少漏掉1%。1980年以来,我们进行了以下成功的改造。120℃以下的各种螺纹连接处,用四氟生料带密封,取代了原用麻和铅油密封。水管和各仪表管线应用,方便可靠。石墨粉用处广:将石墨粉和机油调成浆糊状,法兰处薄薄涂上一层,再放上石棉橡胶板锁紧,不仅密封好,今后拆换还不必费力去刮。将之涂在碳化等易腐蚀、变换温度高的螺栓
General asbestos products and plastic packing gasket seal, can not meet the requirements of a small nitrogenous fertilizer plant. In 1979, our factory lost 10% of ammonia due to leakage. Among them, 2GC-5 × 4 aluminum-magnesium alloy pump was filled with asbestos packing, losing at least 1% every day. Since 1980, we have carried out the following successful transformations. 120 ℃ below a variety of threaded connections, with PTFE raw material with a sealed, replaced the original Ma and lead oil seal. Water pipes and instrumentation pipeline applications, convenient and reliable. Wide use of graphite powder: The graphite powder and machine oil into a paste, the flange at a thin layer coated, and then put the asbestos rubber sheet locking, not only sealed, the future replacement also do not have to go to scratch. Apply it to carbonized, easily corroded, high temperature change bolts