机封冲洗方案mechanical_seal_piping_plans..doc

PLAN 01 Description：plan 01 is an internal recirculation from the pump discharge area of the pump into the seal chamber，similar to plan 11 but with no exposed piping。 Advantages：no product contamination and no external piping，which is advantageous on highly viscous fluids at lower temperatures to minimize the risk of freezing that can occur with exposed piping 。 General：this flush plan should only be used for clean products as dirty products can clog the internal line。 Not recommended on vertical pumps. 方案01 描述:方案01是一个内部循环，泵的排泄区泵入密封腔,与方案11类似,但没有暴露管道。 优点:没有产品污染,没有外部管道,这有利于高粘度流体在在较低的温度下的风险降到最低的冻结可能发生在管道。 综合: 这种冲洗方案只能被用于清洁产品，产品可以堵塞内部肮脏线。不推荐在垂直泵。 PLAN 02 Description：plan 02 is a non-circulating flush plan where adequate vapor suppression can be assured 。 Advantageous ：solids are not continually introduced into the seal chamber ，no external hardware is required and natural venting occurs when used with a tapered bore seal chamber。 General：ideal with large bore/tapered bore ASME B73.1 or specialized ISO 3096 seal chambers or with hot process pumps utilizing a cooling jacket 。on the latter services ，a plan 62 with steam can also provide some additional cooling 。 方案02 描述:方案02是一个非流通股冲洗计划哪里才能保证足够的蒸汽抑制。 优点:固态不是不断引入密封腔,没有外部硬件要求和自然通风时发生锥孔用密封腔。 综合:理想与大孔/ ASME B73.1锥孔或专门的ISO密封腔或用热过程泵利用冷却套在后者服务,计划于年与水蒸汽也可以提供一些额外的冷却。 PLAN 11 Description：Plan 11 is the most common flush plan in use today。This plan takes fluid from the pump discharge（or from an intermediate stage） through an orifice（s）and directs it to the seal chamber to the seal chamber to provide cooling and lubrication to the seal faces。 Advantageous：no product contamination and piping is simple。 General：if the seal is set up with a distributed or extended flush ，the effectiveness of the system will be improved。 方案11 描述：方案11是现在最普遍使用的一种冲洗方案。这个方案需要液体从泵出口(或从一个中期)通过一个孔和指导它的密封腔的密封腔提供冷却和润滑密封的脸。 优点：不会产生污染物，而且管路简单。 综合：如果密封建立了一个分布式或延期冲洗,该系统会有所提高。 PLAN 12 Description：Plan 12 is similar to plan 11，except that a strainer or filter is ad