美標截止閥設計未考慮每個特定的工況，用戶或管道系統(tǒng)的設計者應根據(jù)其特定的工況，正確選擇和使用合適班級磅級和材料的美標截止閥;作為按常規(guī)設計的美標截止閥，美標截止閥選用時提請用戶注意以下幾點.

美標截止閥使用說明書介紹

感謝您選用了本公司美標截止閥。美標截止閥作為承壓設備的一類，具有潛在的壓力危害。提供本說明書是本公司的業(yè)務，為您在選用、保管、安裝、使用和維修美標截止閥時提供安全指導。

本公司生產(chǎn)的美標截止閥是作為標準產(chǎn)品按BS1873和ASME B16.34設計的，設計時根據(jù)壓力等級進行了足夠的強度計算，并提供了一定的安全余量，美標截止閥的制造和檢驗以一套嚴格的質量保證體系得以保證，這些設計和質量保證以經(jīng)過第三方批準。

本公司的美標截止閥設計未考慮每個特定的工況，用戶或管道系統(tǒng)的設計者應根據(jù)其特定的工況，正確選擇和使用合適班級磅級和材料的美標截止閥。作為按常規(guī)設計的美標截止閥，美標截止閥選用時提請用戶注意以下幾點：

——工作壓力、工作溫度是否超出ASME B16.34的范圍。

——美標截止閥的設計未考慮運輸、風載和地震載荷

——美標截止閥的設計未考慮磨損。

——美標截止閥的設計未考慮特定條件下的疲勞

——美標截止閥的設計未考慮支架、附件、管線產(chǎn)生的反作用力或動能

——美標截止閥的設計未考慮不穩(wěn)定液體的分解而引起的壓力升高或突然致冷     

一、美標截止閥用途和性能規(guī)范

1美標截止閥用途: 截止閥適用于工業(yè)管路上，作為啟閉機構。

2美標截止閥性能規(guī)范：

二、美標截止閥工作原理和結構說明

1本手動閥門按順時針方向旋轉手輪時，閥瓣向下運動使密封面閉合，既為關閉;逆轉時則為開啟。該產(chǎn)品在閥蓋上端設有閥桿螺母，轉動閥桿，閥桿上下運動，達到開關的目的。

2工作介質由閥瓣的下面往上流，也可反方向流。

3閥座與閥瓣的密封面采用不銹鋼堆焊或鑲銅合金，軟密封閥座堆焊不銹鋼。詳細說明見小樣圖所示。

4本閥門的結構長度按ANSI  B16.10的規(guī)定；法蘭連接尺寸：ANSI B16.5 。

三、美標截止閥主要外形尺寸和連接尺寸：

美標截止閥連接尺寸：

四、美標截止閥主要零件的材料:

五、美標截止閥維護保養(yǎng)和安裝使用注意事項

1本閥門通路兩端須堵塞，存放在干燥通風的室內(nèi)，如長期存放，             應經(jīng)常檢查，防止銹蝕。

2安裝前應將閥門清洗干凈，并消除在運輸過程中造成的缺陷。

3安裝時必須仔細核對閥門上的標志和銘牌是否符合使用要求。

4本閥門可安裝于任何工作位置，但必須便于檢修和操作，閥體上的流向與管道內(nèi)介質流向一致。

5本閥門在運行時應全開或全關，不能作節(jié)流使用，以免密封面受沖刷加速磨損。

6開啟或關閉閥門時應用手輪，不得借助杠桿或其它工具

7傳動部位應保持清潔，定期加注潤滑劑。

六、美標截止閥可能發(fā)生的故障及其消除辦法

1填料處滲漏

(1)填料壓蓋太松，可均勻地將壓緊填料壓蓋用的螺母旋緊。

(2)填料圈數(shù)不夠，應增加填料。

(3)填料由于使用過久或保存不當失效，應更換填料 。

2閥瓣和閥座密封面處滲漏

(1)密封面間夾有污物，可沖洗消除之。

(2)密封面如有損傷，應重新研磨，必要時可重新堆焊及加工，研磨的密封面必須平整，其粗糙度不得低于0.4 ，軟密封的應更換橡膠圈。

3閥體和閥蓋連接處滲漏

(1)螺母擰得不緊或松緊不均勻,可重新調(diào)整之。

(2)法蘭密封面上有損傷或積有污物。應進行修整密封面或清除污物。

(3)墊片損壞，應更換新墊片。

4閥桿傳動不靈活

(1)填料壓得過緊或填料壓蓋歪斜，調(diào)整填料壓蓋上的螺母。

(2)閥桿和閥桿螺母上的螺紋有損傷或積有污物，應拆開修整螺紋或清除污物。

GLOBE VALVE

O&M MANUAL

SHANGHAI VALVE FACTORY CO.，LTD

O & M Manual for Globe Valve

1. Application and specification

1.1 Application: A globe valve is used on an industrial pipeline as an on-off valve.

1.2 Specification:

2.Principle and structural description

2.1 When the handwheel is rotated clockwise, the disc moves downward to shut off the seating surfaces, so the valve is closed; on the contrary, the valve will be opened when the handwheel is rotated counter-clockwise. The valves of model J11T-16 and series J23H have not any stem nuts, of which the rising nuts are in the bonnets and are cut from the bonnets directly. Stem nuts are designed on the top of the bonnets of valves series J41. The stems of the above valves can move up and down so as to close and open the valve.

2.2 The medium flows upwards from under the disc, and can also flow downwards.

2.3 The seating surface of the seat and the disc is deposited with stainless steel or copper alloy, and as to soft seated valves, their seats are deposited with stainless steel. More detailed structures are shown on the drawings.

2.4 The face-to-face dimensions of the valve are in accordance with ANSI  B16.10 standard; For the flange ends：the valves of cast steel are in accordance with ANSI B16.5 standard.

3. Main overall dimensions and connection dimensions:

4. Materials of main parts:

5. Maintenance and installation

5.1 Valves shall be kept in a dry and well-ventilated room, their flange ends shall be covered. Valves to be restored for a long period should be regularly inspected in order to prevent them from rust.

5.2 Valves shall be cleaned up before installation, and all defects incurred during transportation shall be removed off.

5.3 Its identification and nameplate shall be checked if it is applicable before installation.

5.4 Valves can be installed on pipes in any direction, but should be easy to be checked and operated. The arrow direction on the body shall be the same as the medium’s in the pipes.

5.5 Valves should be full-opened or full-closed when in use, and cannot be used as throttle valves to avoid erode and wear the seating surfaces.

5.6 Handwheels shall be used only as opening or closing the valve. Lever or other tools are not permitted.

5.7 The moving parts shall be kept clean and be regularly lubricated.

6. Possible trouble and solution

6.1 Leakage occurs from the packing.

1) If a packing gland is not tightened enough, it will be evenly re-tightened.

2) If the packing rings are not enough, they will be added.

3) If the packing has being used for too long time, or was incorrectly stored, new packing will be replace for them.

6.2 Leakage occurs between the seating surfaces of disc and seat.

If there is dirt between them, please clean it by flush washing.

If the seating surfaces are damaged, they will be re-lapped, or machined and lapped after weld deposition, and their surface roughness must be 0.4 μm and higher. But for the rubber seat, a new rubber ring shall be changed for bad one.

6.3 Leakage occurs between bonnet flanges.

1) If the flange nuts are not tightened enough or unevenly, they will be evenly re-tightened.

If the faces of the flange are damaged or collected with dirt, they will be repaired or cleaned up.

3) If the gasket on flange is damaged, it will be replaced with a new one.

6.4 The stem cannot operate smoothly.

1) If the packing is over-tightened, please loosen the gland nuts properly and evenly.

If the thread of the stem or stem nuts is hurt or has dirt, it will be removed off after having been disassembled.