目前存在氨液循环泵易抽空、液氨产品外观不合格(颜色发红)、液氨外送泵密封泄漏等问题。
There were some new problems such as the easy exhaustion of the liquid ammonia circulating pump and the appearance of liquid ammonia product was off specification.
采用激光熔覆技术对尿素生产线上的甲胺泵进排液阀零件密封面进行强化。
By laser cladding, the sealing face of the in outlet valve parts in methylamine pump in urea production line has been strengthened.
轻烃泵机械密封属于汽液两相密封。
The mechanical seal for light hydrocarbon pump belong to the seal for liquid and gas phases.
安全密封：通过并入比泵流体压力更高的低密度阻隔液，保证了没有泄漏发生。
Safety seal: through the incorporation of a low specific gravity barrier fluid at a higher pressure than the pumped fluid, it guarantees a no leakage sealing action.
在同样条件下，外开槽泵入式密封环的开启力和液膜刚度大于内开槽泵出式密封环的开启力和液膜刚度。
The opening force and film stiffness of the "pumping in" mechanical seal are greater than those of the "pumping out" mechanical seal under the same conditions.
高压凝液系统采用卧式高速泵替代原多级离心泵，并对其密封和隔热部分进行改进，改造后获得良好效果。
The horizontal high - speed pump in replacing the multi - stage centrifugal pump is adopted. Andits seal and isolate heat parts are also improved. Good effect can be gained after improvement.
高压凝液系统采用卧式高速泵替代原多级离心泵，并对其密封和隔热部分进行改进，改造后获得良好效果。
The horizontal high - speed pump in replacing the multi - stage centrifugal pump is adopted. Andits seal and isolate heat parts are also improved. Good effect can be gained after improvement.
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