SPM N2安全閥
SPM可提供兩種類型的氮氣安全閥，可重復式背壓閥和傾卸式全孔卸載閥。
概述
Weir SPM氮氣驅動安全閥有兩種類型：背壓安全閥和全孔卸載閥。 SPM EXL背壓安全閥是SPM背壓式安全閥的下一代產品。 該閥的特點是具有螺紋體，外觀更緊湊，改變了內部功能，提高了適用性。N2安全閥可重新起動，排氣后也可以繼續運行。
SPM® EXL背壓安全閥的特點：
•螺紋閥體到閥蓋接合處，提高安全系數。
•通道式設計，旨在減少閥門的紊流，并減少可能導致不當密封的砂礫堆積。 該設計還可以更好地引導流體通過密封接口并排出排放口。
•氣缸桿具有二次密封，可以提供額外的保護，以防止加壓流體繞過主密封件的和閥蓋總成通電。
•密封組件更易于安裝，可取代傳統的尼龍襯套支撐桿。該密封組件還提供更好的桿對準，改善正常閥循環中的密封。
與SPM®EXL背壓安全閥不同，N2全孔卸載閥和應急排放閥運行方式一樣，直到泵系統關閉并且閥被復位才保持打開狀態。N2全孔卸載閥是操作員在超壓事件后想要完全關閉系統的理想選擇。
全孔卸載閥的特點：
•完全打開閥門排放以立即減壓。
•壓蓋式密封，更容易抵消處理線脈動引起的閥門振動。
•閥帽可保護氮氣軟管免受損壞。
兩種閥門的尺寸都為3英寸，操作壓力高達15,000 psi。
應用
•壓裂
•油井服務
流程
•完井
•油氣生產
關于Weir集團
Weir集團雇有約 14,000 名員工，在 70 多個國家/地區開展業務，致力于為具有良好長期發展前景的市場提供服務。集團擁有成熟可靠的專業知識和技術，能夠在全球各地的礦場加工自然資源，也幫助從世界一些嚴苛作業環境中出產石油與天然氣。集團與客戶緊密合作，在礦業、石油與天然氣、電力與工業市場上為其提供可以提高效率并降低運營成本的產品和服務。
無論客戶在何時何地需要我們，我們都竭力滿足其需求，致力于成為值得客戶信賴的首選合作伙伴。
關于鼎恒石油
四川鼎恒石油是Weir SPM的授權代理商，若需要購買SPM產品或需要了解產品詳細參數及相關疑問，可直接進入鼎恒石油官網咨詢網站客服或者撥打銷售熱線18000522697。
四川鼎恒石油機械設備有限公司(http://www.66777888.com)是一家擁有進出口經營權，長期從事國內外石油天然氣設備和配件的專業銷售公司。鼎恒石油公司總部設在四川成都，在加拿大大不列顛哥倫比亞省成立了分公司。我公司與多家世界知名制造廠商建立了緊密的合作關系。
注：該文章由鼎恒石油編譯，轉發須注明出處。
附英文原文：
SPM® N2 Relief Valves
SPM® offers nitrogen relief valves in two styles, a reseatable backpressure valve and a dump-style full bore unloading valve.
Overview
Weir SPM® nitrogen actuated relief valves come in two versions: a backpressure relief valve and a full bore unloading valve. The SPM® EXL backpressure relief valve is the next generation in SPM’s back pressure relief valve offering. The valve features a threaded body, more compact envelope and changes to internal features that improve serviceability. This valve is able to reseat, making it possible to continue operation after the valve has vented.
The SPM® EXL backpressure relief valve features include:
l Threaded body-to-bonnet engagement for increased safety.
l A channeled spider designed to reduce turbulence in the valve and reduce potential for sand accumulation that can lead to improper sealing. This design also better directs fluid through the seal interface and out the discharge outlet.
l A cylinder rod with a secondary seal for additional protection from pressurized fluid bypassing the primary seals and energizing the bonnet assembly.
l An easier-to-install packing assembly that replaces the legacy nylon bushing supporting rod. This packing assembly also offers better rod alignment, improving sealing in normal valve cycling.
Unlike the SPM® EXL backpressure relief valve, the N2 full bore unloading valve operates as a dump valve, remaining open until the pump system is shut down and the valve is reset. The N2 full bore unloading valve is ideal for operators who want full system shutdown after an overpressure event.
Full bore unloading valve features include:
l Fully open valve discharges for immediate pressure relief.
l Gland style seal that is more forgiving of valve chatter caused by pulsations in treating line.
l Cap guards that protect nitrogen hoses from damage.
Both valves come in a 3-inch size for operating pressures up to 15,000 psi.
Applications
l Fracking
l Well Service
Processes
l Well completions
l Oil and gas production
