api機(jī)械密封沖洗方案(參考版)
2025-07-28 17:35本頁面
【正文】 and ? 16 degree C for mineral oil barrier fluid Plan 11 with Plan 53 ? Arrangement 3 may use Plan 11 amp。 C API 610 8th Edition has eliminated this piping plan. API Piping Plans API 沖洗方案 API Piping Plans API 沖洗方案 ? A fluid used as a lubricant or buffer between dual mechanical seals. ? The buffer fluid is always at a pressure lower than the pump process pressure being sealed. ? A fluid which is introduced between dual mechanical seals to pletely isolate the pump process liquid from the environment. ? Pressure of the barrier fluid is always higher than the pump process pressure being sealed. The purpose of fluid circulation is to remove heat from mechanical seal API Piping Plans API 沖洗方案 Pumping ring Pump ? On applications below ambient temperature, circulation of barrier fluid may not be desirable. ? The atmosphere will heat the reservoir and consequently 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 ou
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