冷凝器与管线控制阀冷却水阀门选型

   2017-01-02 互联网11100
核心提示:通径DN65以上的管线控制阀  LINE CONTROL VALVES 2 1/2”AND LARGER  蝶阀:  BUTTERFLY VALVES:   这类阀门应该是凸耳或国际管道标准I.P.S.管状连接端口阀体,并按照美国阀门和

  通径DN65以上的管线控制阀



  LINE ConTROL VALVES 2 1/2”AND LARGER



  蝶阀:



  BUTTERFLY VALVES:



  这类阀门应该是凸耳或国际管道标准I.P.S.管状连接端口阀体,并按照美国阀门和管件制造商标准化协会MSS-SP67标准制造;通径DN50~DN300额定工作压力是200 psi非冲击冷水,DN350以上是150 psi。用于保温隔热绝缘的阀体具有2英寸的加长管径,材质是铸铁或球墨铸铁。蝶板材质是铝青铜合金,配置三元乙丙橡胶阀座和密封;或三元乙丙橡胶涂层蝶板,配置聚合物涂层阀体。阀杆应该是400系列不锈钢,不能将阀杆暴露在蝶板紧固件上。通径DN65至DN150应该配置具有10个位置节流板的操作手柄;通径DN200以上的蝶阀应该配置齿轮操作机构。凸耳结构和管状结构蝶阀应该能够用作隔断阀,而且不需要下游法兰也可以在全压力下用在管道终端。



  Valves shall be lug or I.P.S. grooved body style manufactured in accordance with MSS-SP67; 2"-12" rated at least 200 psi non-shock cold water working pressure, 14" and larger rated at 150 psi.Body to have 2" extended neck for insulating and to be cast iron or ductile iron. Valve to havealuminum bronze alloy disc with EPDM rubber seat and seals; or EPDM rubber encapsulated disc withpolymer-coated body. Stem shall be 400 series stainless steel and shall not have exposed stem todisc fasteners. sizes 2 1/2"-6" shall be lever operated with 10-position throttling plate; sizes8" and larger shall have gear operators. Lug-style and grooved style shall be capable for use asisolation valves and recommended by manufacturer for dead-end service at full pressure withoutthe need for downstream flanges.



  可采用的阀门:



  凸耳阀体,铝青铜蝶板的美国尼伯科LD2000-3蝶阀(手柄操作机构);LD2000-5蝶阀(齿轮操作机构);LD1000-5蝶阀(齿轮操作机构),通径DN350以上。



  管状阀体,橡胶涂层蝶板的美国尼伯科GD4765-3蝶阀(手柄操作机构);GD4765-5蝶阀(齿轮操作机构)



  ACCEPTABLE VALVES:



  Lug body, aluminum bronze disc NIBCO LD2000-3 (lever operator); LD2000-5 (gear operator);LD1000-5 (gear operator) 14" and larger



  Grooved body, rubber-coated disc NIBCO GD4765-3 (lever operator); GD4765-5 (gear operator)



  闸阀,截止阀/角阀:



  GATE, GLOBE/ANGLE VALVES:



  这些阀门工作压力为125磅级,并按照美国阀门与管件制造商标准化协会MSS-SP70(闸阀)标准或MSS-SP85(截止阀/角阀)标准制造,法兰连接,螺栓阀盖,OS&Y,铸铁阀体,青铜阀内件,阀体和阀盖材质符合美国材料试验协会ASTM A 126级别B标准铸铁,填料和衬垫不含石棉。



  Valves to be Class 125 manufactured in accordance with MSS-SP70 (gate) or MSS-SP85 (globe/angle), flanged, bolted bonnet, OS&Y, iron body, bronze trimmed, with body and bonnetconforming to ASTM A 126 Class B cast iron. Packing and gaskets to be non-asbestos.



  可采用的阀门:



  美国尼伯科F-617-O闸阀



  美国尼伯科F-718-B截止阀



  美国尼伯科F-818-B角阀



  ACCEPTABLE VALVES:



  Gate NIBCO F617-0;



  Globe NIBCO F718-B;



  Angle NIBCO F818-B

 
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