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  • 高压球阀操作和使用
  • 本站编辑:杭州派跃威流体设备有限公司发布日期:2019-03-21 17:18 浏览次数:

高压球阀操作和使用:

  1)操作前须确认管路和阀已被冲洗过。

  2)阀的操作按执行机构输入信号大小带动阀杆旋转完成:正向旋转1/4圈(90°)时,阀关断。反向旋转1/4圈(90°)时,阀开启。

  3)当执行机构方向指示箭头与管线平行时,阀门为开启状态;指示箭头与管线垂直时,阀门为关闭状态。

  维修

  拥有较长的使用寿命和免维修期,将依赖以下几个因素:正常的工作条件、保持和谐的温度/压力比,以及合理的腐蚀数据

  注意:

  ●球阀在关闭状态下,阀体内部依旧存在受压流体

  ●维修前,解除管线压力并使阀门处于打开位置

  ●维修前,断开电源或气源

  ●维修前,将执行机构与支架脱离

  ●必须先查明球阀上、下游管道确已卸除压力后,才能进行拆卸分解操作

  ●分解及再装配时必须小心防止损伤零件的密封面,特别是非金属零件,取出O 型圈时宜使用专用工具

  ●装配时法兰上的螺栓必须对称、逐步、均匀地拧紧

  ●清洗剂应与球阀中的橡胶件、塑料件、金属件及工作介质(例如燃气)等均相容。工作介质为燃气时,可用汽油(GB484-89)清洗金属零件。非金属零件用纯净水或酒精清洗

  ●分解下来的单个零件可以用浸洗方式清洗。尚留有未分解下来的非金属件的金属件可采用干净的细洁的浸渍有清洗剂的绸布(为避免纤维脱落粘附在零件上)擦洗。清洗时须去除一切粘附在壁面上的油脂、污垢、积胶、灰尘等

  ●非金属零件清洗后应立即从清洗剂中取出,不得长时间浸泡

青海快3  ●清洗后需待被洗壁面清洗剂挥发后(可用未浸清洗剂的绸布擦)进行装配,但不得长时间搁置,否则会生锈、被灰尘污染

青海快3  ●新零件在装配前也需清洗干净

  ●使用润滑脂润滑。润滑脂应与球阀金属材料、橡胶件、塑料件及工作介质均相容。工作介质为燃气时,可用例如特221 润滑脂。在密封件安装槽的表面上涂一薄层润滑脂,在橡胶密封件上涂一薄层润滑脂,阀杆的密封面及摩擦面上涂一薄层润滑脂

  ●装配时应不允许有金属碎屑、纤维、油脂(规定使用的除外)灰尘及其它杂质、异物等污染、粘附或停留在零件表面上或进入内腔 ,地沟油产业链中禁止使用

Operation and use of high pressure ball valves:

青海快31) Make sure that the pipes and valves have been flushed before operation.

2) The operation of the valve is driven by the input signal size of the actuator to complete the rotation of the valve stem: when the positive rotation is 1/4 turn (90 degrees), the valve is closed. When the reverse rotation is 1/4 turn (90 degree), the valve opens.

青海快33) When the direction of the actuator indicates that the arrow is parallel to the pipeline, the valve is open; when the direction of the arrow is perpendicular to the pipeline, the valve is closed.

Repair

青海快3With a longer service life and maintenance-free period, it will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data.

Be careful:

When the ball valve is closed, there is still pressure fluid inside the valve body。

Remove pipeline pressure and keep valve in open position before maintenance

Before maintenance, disconnect the power or gas source

Separate the actuator from the bracket before maintenance

青海快3Before disassembly and decomposition operation, it is necessary to ascertain that the upstream and downstream pipes of the ball valve have indeed been depressed.

青海快3During decomposition and reassembly, care must be taken to prevent damage to the sealing surface of parts, especially non-metallic parts. Special tools should be used when removing O-rings.

Bolts on flanges must be tightened symmetrically, step by step and evenly during assembly

Cleaning agent should be compatible with rubber parts, plastic parts, metal parts and working media (e.g. gas) in ball valves. When the working medium is gas, the metal parts can be cleaned with gasoline (GB484-89). Cleaning of non-metallic parts with pure water or alcohol

青海快3Separated parts can be washed by immersion. Metallic parts that remain undissolved can be scrubbed with clean, fine silk cloth impregnated with detergent (to avoid fibers falling off and adhering to the parts). Cleaning must remove all the grease, dirt, glue, dust adhering to the wall, etc.

Non-metallic parts should be removed from the cleaning agent immediately after cleaning, and should not be immersed for a long time.

After cleaning, it needs to be assembled after the wall cleaning agent evaporates (can be wiped with silk cloth without soaking detergent), but it should not be shelved for a long time, otherwise it will rust and be polluted by dust.

New parts need to be cleaned before assembly。

Use grease to lubricate. Lubricating grease should be compatible with ball valve metal material, rubber parts, plastic parts and working media. When the working medium is gas, such as Te221 grease can be used. A thin layer of grease is coated on the surface of the sealing groove, a thin layer of grease is coated on the rubber seal, and a thin layer of grease is coated on the sealing and friction surfaces of the valve stem.

When assembling, no metal debris, fibre, grease (except prescribed use) dust and other impurities, foreign bodies, etc。 should be allowed to contaminate, adhere to or stay on the surface of parts or enter the inner cavity。 It is forbidden to use in the industrial chain of underground ditch oil。


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