【文章內(nèi)容簡介】 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. 這種液體象緩沖劑，潤滑劑用在雙機(jī)械密封 ? The buffer fluid is always at a pressure lower than the pump process pressure being 沖液的壓力通常低于被密封的介質(zhì)的壓力 ? A fluid which is introduced between dual mechanical seals to pletely isolate the pump process liquid from the 藝液體與大氣分離 ? Pressure of the barrier fluid is always higher than the pump process pressure being 于泵的運(yùn)作壓力 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. 這種情況適用于比室溫低的工況，隔離液的循環(huán)不能滿足要求。 The atmosphere will heat the reservoir and consequently add heat to the seal ，從而，對密封區(qū)域進(jìn)行加熱。 T2 T1 ? Fluid circulation by temperature difference between the seal and reservoir. 流體依靠密封腔和儲罐的溫差進(jìn)行循環(huán) ? Higher temperature liquid at seal has lower density rises to the 密度較小，依靠熱虹吸現(xiàn)象上升到儲罐中 ? Lower temperature liquid at reservoir has higher density falls to the seal to provide 溫流體密度較大，下降到密封腔中對密封進(jìn)行冷卻 API Piping Plans API 沖洗方案 Points to Note for API Plan 52: ? Typically used with an Arrangement 2 unpressurised dual ? During normal operation, circulation is maintained by an internal pumping 操作情況下，通過腔內(nèi)的泵效環(huán)維持循環(huán) ? The reservoir is usually continuously vented to a vapour recovery system and is maintained at a pressure less than the pressure in the seal ，罐內(nèi)壓力通常低于密封腔壓力 Pressure Gauge 壓力計 Level Gauge 水準(zhǔn)儀 Fill valve Orifice Drain Level Switch (H) 電平開關(guān) Level Switch (L) Pressure Switch 壓力開關(guān) (Normally Open) Vent valve 排氣閥 External reservoir providing buffer fluid for the outer seal of an unpressurised dual seal arrangement. 外部儲罐對不帶壓雙封的外密封起緩沖液的作用 API Piping Plans API 沖洗方案 Pressure Gauge 壓力表 Level Gauge 水準(zhǔn)儀 Level Switch (L) 電平開關(guān) Vent Valve 排氣閥 (Normally Close) 通常關(guān)著 Orifice Pressure Switch 壓力操縱開關(guān) External Pressure 外部壓力 Source Oneway Block Valve (Normally Open) Points to Note for API Plan 53: ? Typically used with an Arrangement 3 pressurised dual ? During normal operation, circulation is maintained by an internal pumping 操作情況下，通過腔內(nèi)的泵效環(huán)維持循環(huán) ? The reservoir pressure is greater than the process pressure being 于被密封介質(zhì)壓力 External reservoir providing pressurised barrier fluid for the outer seal of an pressurised dual seal 外密封起隔離液的效果 Drain API Piping Plans API 沖洗方案 Points to Note for API Plan 54: ? Typically used with an Arrangement 3 pressurised dual ? During normal operation, circulation is maintained by an external pump or pressure ，通過外部的泵或壓力系統(tǒng)維持循環(huán) ? The circulating barrier fluid pressure is greater than the process pressure being sealed. 循環(huán)隔離液的壓力高于被密封介質(zhì)的壓力 External barrier fluid system providing pressurised barrier fluid for the outer seal of an pressurised dual seal arrangement 外部隔離液系統(tǒng)對帶壓雙封的外密封提供帶壓隔離液 API Piping Plans API 沖洗方案 ? Safe to use, handle, store儲藏、操作、使用安全可靠 ? Stable liquid at ambient temperatures在室溫下，性能穩(wěn)定 ? Not a VOC, VHAP or other regulated pound ? 不易揮發(fā)、非有毒物質(zhì) ? Non flammable不易燃燒 ? Non foaming when pressurised高于常壓時，不易起泡 ? Clean and good lubricity干凈且有較好的潤滑性 ? Compatible with process fluid與工藝流體有互容性 ? Compatible with seal materials與密封材料相一致 ? Good heat transfer properties有好的傳熱性能 ? Good flow qualities at very low temperatures ? 在低溫下，有好的流動性 ? Low solubility of gas對氣體有較低的溶解性 ? Local availability當(dāng)?shù)厝菀撰@得 ? Low cost成本低 VOC : Volatile Organic Compound VHAP : Volatile Hazardous Air Polutants API Piping Plans API 沖洗方案 Tapped connections for the purchaser?s use 在接口處攻螺紋，以方便用戶使用 Point to Note for API Plan 61:對于 API plan 61 須注意 : ? Typically this plan is used when the purchaser is to provide fluid (such as steam, gas, or water ) to an auxiliary