The use of gate valve can ensure that the fluid direction of the later valve is consistent, and the throttling effect cannot be achieved during use. It is mainly divided into exposed rod and concealed rod, which is different from ordinary gate valve. Next, Shanghai Lianggong valve manufacturer will introduce the differences between gate valve and fire gate valve and the characteristics of fire gate valve.

一、閘閥

1、 Gate valve

上海良工閥門廠家提到閘閥是由開閉部件組成的閘板，閘板運動方向與流動方向垂直。閘閥只能全開和全關(guān)。當(dāng)閘板隨閥桿作直線運動時，不適應(yīng)閘板參數(shù)，提高其可制造性，并補償加工時密封面的角度偏差，這種門叫做彈性閘門。

Shanghai Lianggong valve manufacturer mentioned that the gate valve is a ram composed of opening and closing parts, and the movement direction of the ram is perpendicular to the flow direction. The gate valve can only be fully opened and fully closed. When the gate moves in a straight line with the valve stem, it does not adapt to the gate parameters, improve its manufacturability, and compensate the angular deviation of the sealing surface during processing. This kind of gate is called elastic gate.

二、防火閘閥

2、 Fireproof gate valve

防火閥的啟閉部分是門，門的運動方向與流體的方向垂直。閘閥只能全開和全關(guān)，不能調(diào)節(jié)或節(jié)流。閘板有兩個密封面，常用的型號閘閥的兩個密封面呈楔形。楔角隨閥門參數(shù)變化。楔形閘閥閘板可以做成一個整體，稱為剛性閘板;也可改制成能產(chǎn)生輕微變形的澆口，以提高其可制造性，補償加工時密封面角度的偏差，這種門叫做彈性閘門。

The opening and closing part of the fire damper is the door, and the moving direction of the door is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The ram has two sealing surfaces, and the two sealing surfaces of commonly used gate valves are wedge-shaped. Wedge angle varies with valve parameters. Wedge gate valve can be made into a whole, which is called rigid gate; It can also be transformed into a gate that can produce slight deformation to improve its manufacturability and compensate for the deviation of sealing surface angle during processing. This kind of gate is called elastic gate.

按閥桿螺紋位置可分為明桿閘閥和暗桿閘閥

According to the thread position of the valve stem, it can be divided into rising stem gate valve and Non rising stem gate valve

1、重量輕：閥體采用黑色球墨鑄鐵，比傳統(tǒng)閘閥輕20%-30%，安裝維護(hù)方便。

1. Light weight: the valve body is made of black nodular cast iron, which is 20% - 30% lighter than the traditional gate valve and convenient for installation and maintenance.

2、平底閘閥閥座：傳統(tǒng)閘閥用水沖洗后，石子、木頭、水泥、鐵屑、雜物等異物。它們將沉入閥座的凹槽中。因為不能關(guān)緊，容易造成漏水。

2. Flat bottom gate valve seat: after the traditional gate valve is washed with water, there are stones, wood, cement, iron filings, sundries and other foreign matters. They will sink into the groove of the seat. Because it cannot be closed tightly, it is easy to cause water leakage.

3、一般涂膠：門內(nèi)外涂膠良好。橡膠硫化技術(shù)使硫化后的澆口能夠保證準(zhǔn)確的幾何尺寸。橡膠和堅固的澆鑄閘門連接牢固，不易脫落，彈性記憶性好。

3. General gluing: good gluing inside and outside the door. Rubber vulcanization technology enables the gate after vulcanization to ensure accurate geometric dimensions. The rubber is firmly connected with the solid casting gate, which is not easy to fall off and has good elastic memory.

4、鑄造閥體：閥體采用鑄造工藝，準(zhǔn)確的幾何尺寸保證了閥門的密封性能，無需任何表面處理。

4. Cast valve body: the valve body adopts the casting process, and the accurate geometric size ensures the sealing performance of the valve without any surface treatment.

以上就是上海良工閥門廠家就為大家介紹的閘閥與消防閘閥的差異及其消防閘閥的特點，在使用不同的閥門時都要對其進(jìn)行提前的了解，同一款閥門在使用時因其微小的區(qū)別也存在一些差異。

The above is the difference between gate valve and fire gate valve and the characteristics of fire gate valve introduced by Shanghai Lianggong valve manufacturer. When using different valves, we should understand them in advance. There are also some differences in the use of the same valve due to its small differences.