調節閥維修的具體操作

管線由于組合或安裝不當會產生各種應力，例如高溫介質產生的熱應力，安裝時緊固力不均衡造成的應力，人為的某些碰撞給調節閥及其管道造成的應力等。這些應力作用在調節閥及其管線上，很容易對調節閥的性能產生影響，嚴重時會影響到調節系統本身，導致閥桿和導向件變形而不能和閥座對準中心；對于分體式閥體的調節閥，可能引起閥體法蘭的脫開；應力還可能引起閥座泄漏等。因此，任何時刻都要保證避免或消除應力，把應力導向遠離調節閥的地方。
1.2檢查支撐情況
安裝調節閥的最佳位置是使閥桿的行程方向與閥體上方的執行機構在一個垂直平面上。如果調節閥必須安裝在使閥桿水平移動的位置，或者閥桿的移動方向與水平面有一定的傾角時，就應該把執行機構支撐起來，使調節閥的各個部件都處于自然狀態。如果不加設支撐或者支撐加設不當都可能造成調節閥閥桿與閥座的不同心，容易導致差變或使填料泄漏等故障。即使調節閥有固定和支撐措施，也必須定期進行檢查，一般2～3個月檢查一次。
1.3清除或防止異物進入要經常檢查調節閥連接管道內有無鐵銹、焊渣、污物等，發現后應及時清除。如果調節閥及管道中容易積聚異物，則要考慮在調節閥上游側安裝簡易的過濾裝置。在工藝介質中容易滲入硬質雜物的場合，一定要安裝永久性的過濾裝置。因為調節閥在關閉時，很小的一塊鐵銹或焊渣就足以破壞研磨得很好的閥座密封面，況且這些污物也會對調節閥閥芯和閥座造成磨損，影響其正常運行。
1.4定期檢查氣源和電源
氣源是驅動調節閥的關鍵能源之一。氣動調節閥的膜室雖然不消耗空氣，但如果氣源系統含有水分、油污等雜質，則會使閥門定位器、繼動器等附件堵塞并發生故障。因此必須定期對氣源和電源進行檢查，保證氣源清潔、干燥，電源可靠。
1.5定期檢修和加油
填料和注油器在短期使用后需要重新調整。塵土多的場合要在閥桿周圍用塑料套或橡膠套保護填料函和導向部位，有腐蝕性氣體或液滴存在的場合要采用特殊的保護措施，一般用防腐袋包住調節閥，但要注意不能影響它的操作。在有耐火性要求的場合，可以采用特殊耐火涂料、套防火袋等方法，防火袋的材料含有多層陶瓷纖維或玻璃纖維。
1.6運輸和保管
調節閥在組裝和油漆并按要求裝上執行機構、手輪、定位器等附件以后，為防止外來物質進入調節閥，連接調節閥的全部空氣接口都要堵上，連接法蘭裝上保護罩，要留意各個連接部位，例如閥門定位器進氣管、執行機構接口的狀態。易損壞的任何突出的附件，如注油器和電位器的壓力表，應從接頭上拆下，與調節閥分開包裝并一同運輸。調節閥應用專用的支架固定，防止松動，要保證整體的垂直位置或水平位置。如果遠距離運輸，最好用牢固的木箱裝運。 保管調節閥時，不要把調節閥支承在敏感部位，例如閥門定位器、閥桿等處。運輸和保管的環境條件應滿足產品說明書要求。保管區域最好不要進行其他作業，無法避免時，必須注意不要碰到調節閥。場所還要避免受風沙、塵土、雨水等惡劣條件的影響，如果沒有合適的場所，在貯藏前必須把調節閥裝在防潮袋中，或放在類似的容器中。
1.7安全運行的檢查
對在爆炸性危險場所使用的調節閥和有關附件應檢查其安全運行情況，例如，密封蓋是否擰緊，安全柵的運行情況，電源供應情況等，保證調節閥及有關附件能夠安全運行。
譯文：
Regulating valve repair concrete operation: < br / > 1.1 to eliminate stress
Pipeline due to the combination or improperly installed can produce all kinds of stress, thermal stress of high temperature medium, for example, when installation fastening force caused by uneven stress, human some of the regulating valve and pipeline stress caused by the collision, etc. These stress on regulating valve and pipeline, it is easy to affect the performance of the regulating valve, seriously will affect the control system itself, lead to deformation of the valve stem and guide and cannot aim and seat center; For split type valve regulating valve, may cause the valve flange release; Stress may cause the seat leakage, etc. Any moment, therefore, make sure to avoid or eliminate stress, the stress direction away from the regulator.
1.2 check the support conditions
Install regulator is the best position to make the travel direction of the stem at the top of the actuator to the valve body in a vertical plane. If the regulator must be installed on the valve stem horizontal mobile location, or the movement of the valve stem direction and horizontal plane has a certain Angle, you should put actuator support, make the regulator of the parts are in a state of nature. If not described.compare or improper support adding may cause different heart valve stem and valve seat, can easily lead to poor or make packing leakage fault. Even if the regulator have fixed and supporting measures, must also be checked regularly, check general 2 ~ 3 months at a time.
1.3 remove or prevent foreign bodies from entering the often should check whether there is any rust on regulating valve connection pipe, welding slag, dirt, etc., should keep clear of in time. If among the accumulation of the regulating valve and pipeline, should consider side valve upstream of the regulator installation simple filtration unit. In the process of medium easy to penetrate hard sundry occasions, the permanent filter must be installed. Because the regulator in closing, a small piece of rust or welding slag was enough to destroy the valve seat sealing surface grinding well, besides the dirt on the regulator valve core and valve seat wear, affecting its normal operation.
1.4 check the air supply and power supply on a regular basis
Gas source is one of the key energy drive regulator. Although not consume air pneumatic control valve of the film room, but if the air supply system contains impurities such as water, oil, can make the valve positioner, relay and other attachment plug and failure. Must therefore be regularly check for gas source and power supply, ensure the air clean, dry, reliable power supply.
1.5 preventive maintenance and refueling
Packing and oiler needs to be adjusted after short term use. Many occasions to dust covered with plastic or rubber around the valve stem packing box and the guide parts, presence of corrosive gas or liquid droplets occasions to the use of special protective measures, the commonly used anti-corrosion bag by the regulator, but does not influence its operation. Where fire resistance requirements, can use special methods of refractory coating, cover fire bag, fire bags containing multilayer ceramic fiber or glass fiber materials.
1.6 transportation and storage
Regulating valve in assembly and painting and installed according to the requirement, the handwheel actuator, locator and other accessories, to prevent foreign matter into the regulator, whole air interface connecting the regulator to plug, connecting flange mount shield, to pay more attention to the connection parts, such as valve positioner intake pipe and actuators of the interface state. Any outstanding attachments, easily damaged the wound oiler and potentiometer pressure gauge, the fitting should be removed, with regulator separate packing and transportation. Regulator application special bracket, prevent loose, to ensure that the overall vertical or horizontal position. If long distance transportation, had better use strong wooden shipment.
Custody of the regulator, don't put the regulator support in sensitive areas, such as the place such as valve positioner, valve stem. Transportation and storage conditions should meet the product specifications. Storage area is best not to other assignments, inevitably, must be careful not to touch regulator. Place to avoid the negative conditions, such as sand, dust, rain, influence, if not the right place, must be the regulator in moisture bag in front of the store, or in similar containers.
1.7 the safe operation of the check
For use in explosive dangerous places the regulator and the related attachment should check the safe operation of the situation, for example, sealing cover are tight, the operation situation of safety barrier, power supply, etc., ensure to safe operation of the regulator and related accessories.

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