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  压缩空气系统阀门选型
COMPRESSED AIR SPECIFICATIONS

美国尼必可有限公司

通径DN65以下管线控制阀
LINE CONTROL VALVES 2 1/2" AND SMALLER

  球阀:
  BALL VALVES:

  这类阀门的冷工作压力应该为600 psi,两件式铸青铜阀体,聚四氟乙烯阀座,标准流道,分离式包装螺母,配置可调节阀杆填料,防吹出阀杆和镀铬黄铜/青铜球体。在需要关注压降的地方,需要采用不缩径全流道球阀或类似结构的阀门。阀门连接端口应该具有足够深度的美国国家标准协会ANSI螺纹,或加长焊接端口,并按照美国阀门和管件制造商标准化协会MSS-SP110标准制造。如果要求绝缘,则这类阀门要符合美国职业安全与卫生条例OSHA 停工/歇业标准1910-147,在停工期间,应该能够将通风空气排放到大气中。这类阀门应该适合配置锁定装置,使得阀门能够锁定在开启或关闭状态。
  Valves shall be rated 600 psi cold working pressure and will have 2-pc. cast bronze bodies, TFE seats, standard port, separate packnut with adjustable stem packing, antiblowout stems and chrome-plated brass/bronze ball. Where pressure drop is a concern, full-port ball valves of like construction are to be used. Valve ends shall have full depth ANSI threads and be manufactured to comply with MSS-SP110. Where applicable for isolation, valves to be in compliance with OSHA Lockout/Tagout Standard 1910-147 and shall be designed to vent air to atmosphere upon closure. Valves shall be fitted with locking device so valves can be locked in open or closed position.
  可采用的标准流道阀门:
  美国尼必可T-580-70球阀(螺纹)
  ACCEPTABLE VALVES STANDARD PORT:
  NIBCO T580-70 (threaded)

  可采用的不缩径全流道阀门:
  美国尼必可T-585-70球阀(螺纹)
  ACCEPTABLE VALVES FULL PORT:
  NIBCO T585-70 (threaded)

  可采用的OSHA阀门:
  美国尼必可T-580-70SV球阀
  ACCEPTABLE OSHA VALVES:
  NIBCO T580-70SV

  止回阀:
  CHECK VALVES:

  (注意:如果空气压缩机是往复型,则止回阀应该位于接受槽的下游位置。)
  (NOTE: If air compressor is reciprocating type, Check Valves shall be downstream of receiver tank.)    通径DN65以下的止回阀应该采用Y形旋启式结构,并按照美国阀门和管件制造商标准化协会MSS-SP80标准制造,工作压力125磅级,符合美国材料试验协会ASTM B 62标准的青铜阀体,配置聚四氟乙烯阀座阀瓣,或配置弹性阀座的弹簧驱动升降式止回阀。阀门连接方式应该是螺纹或焊接。
  2 1/2" and smaller shall be Y-pattern swing-type manufactured in accordance with MSS-SP80, Class 125, bronze ASTM B 62 body with TFE seat disc or spring-loaded lift-type with resilient seating. Valve ends to be threaded-type.
  可采用的阀门:
  125磅级美国尼必可T-413-Y止回阀(螺纹)
  美国尼必可T-480-Y弹簧驱动升降式止回阀(螺纹)
  ACCEPTABLE VALVES AND POSTS:
  Class 125 NIBCO T413-Y (threaded)
  Spring-actuated lift-type NIBCO T480-Y (threaded)

 

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,配置丁纳橡胶-N阀座和密封;或丁纳橡胶-N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。凸耳结构和开槽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。手柄操作阀门应该适用于锁定在开启或关闭位置。
  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 have plated ductile iron or aluminum bronze alloy disc with Buna-N rubber seat and seals; or Buna-N rubber encapsulated disc with polymer-coated body. Stem shall be 400 series stainless steel and shall not have exposed stem to disc fasteners. Sizes 2 1/2"-6" shall be lever-operated with 10-position throttling plate; sizes 8" and larger shall have gear operators. Lug-style shall be capable for use as isolation valves and recommended by manufacturer for dead-end service at full pressure without the need for downstream
flanges. Lever-operated valves shall be designed to be locked in the open or closed position.

  可采用的阀门:
  凸耳阀体,电镀球墨铸铁蝶板的美国尼必可LD3110-3蝶阀(手柄操作机构);LD3110-5蝶阀(齿轮操作机构)
  凸耳阀体,铝青铜蝶板的美国尼必可LD2100-3蝶阀(手柄操作机构);LD2100-5蝶阀(齿轮操作机构
  管状阀体,橡胶涂层蝶板的美国尼必可GD4775-3蝶阀(手柄操作机构);GD4775-5蝶阀(齿轮操作机构)
  ACCEPTABLE VALVES:
  Lug body, plated D.I. disc NIBCO LD3110-3
(lever operator); LD3110-5 (gear operator)
  Lug body, aluminum bronze disc NIBCO LD2100-3
(lever operator); LD2100-5 (gear operator)
  Grooved body, rubber-coated disc NIBCO GD4775-3 (lever operator); GD4775-5 (gear operator)

  止回阀:
  CHECK VALVES:

  (注意:如果空气压缩机是往复型,则止回阀应该位于接受槽的下游位置。)
  (NOTE: If air compressor is reciprocating type, Check Valves shall be downstream of receiver tank.)    通径DN65以上的止回阀应该采用平板式(对夹式)结构,并配置不锈钢弹簧,青铜阀瓣板,丁纳橡胶-N阀座,符合美国材料试验协会ASTM A 126级别B标准或A 48标准的铸铁阀体,配置125磅级或150磅级法兰。
  2 1/2" and larger shall be wafer-style with stainless steel spring, bronze disc plates, Buna-N rubber seat, body of cast iron ASTM A 126 Class B or A 48 for use with Class 125/150 flanges.
  可采用的阀门:
  美国尼必可W-920-W,KW-900-W或W-910-W弹簧驱动升降式止回阀
  ACCEPTABLE VALVES:
  Spring-actuated wafer-type NIBCO W920-W or KW900-W or W910-W

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