api機(jī)械密封沖洗方案(編輯修改稿)
2025-08-21 17:35 本頁面
【文章內(nèi)容簡介】 uently add heat to the seal area. T2 T1 ? Fluid circulation by temperature difference between the seal and reservoir. ? Higher temperature liquid at seal has lower density rises to the reservoir. ? Lower temperature liquid at reservoir has higher density falls to the seal to provide cooling. API Piping Plans API 沖洗方案 Points to Note for API Plan 52: ? Typically used with an Arrangement 2 unpressurised dual seal. ? During normal operation, circulation is maintained by an internal pumping ring. ? The reservoir is usually continuously vented to a vapour recovery system and is maintained at a pressure less than the pressure in the seal chamber. Pressure Gauge Level Gauge Fill valve Orifice Drain Level Switch (H) Level Switch (L) Pressure Switch (Normally Open) Vent valve External reservoir providing buffer fluid for the outer seal of an unpressurised dual seal arrangement. API Piping Plans API 沖洗方案 Pressure Gauge Level Gauge Level Switch (L) Vent Valve (Normally Close) Orifice Pressure Switch External Pressure Source Oneway Block Valve (Normally Open) Points to Note for API Plan 53: ? Typically used with an Arrangement 3 pressurised dual seal. ? During normal operation, circulation is maintained by an internal pumping ring. ? The reservoir pressure is greater than the process pressure being sealed. External reservoir providing pressurised barrier fluid for the outer seal of an pressurised dual seal arrangement. Drain API Piping Plans API 沖洗方案 Points to Note for API Plan 54: ? Typically used with an Arrangement 3 pressurised dual seal. ? During normal operation, circulation is maintained by an external pump or pressure system. ? The circulating barrier fluid pressure is greater than the process pressure being sealed. External barrier fluid system providing pressurised barrier fluid for the outer seal of an pressurised dual seal arrangement API Piping Plans API 沖洗方案 ? Safe to use, handle, store ? Stable liquid at ambient temperatures ? Not a VOC, VHAP or other regulated pound ? Non flammable ? Non foaming when pressurised ? Clean and good lubricity ? Compatible with process fluid ? Compatible with seal materials ? Good heat transfer properties ? Good flow qualities at very low temperatures ? Low solubility of gas ?
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