軟密封彈性座封閘閥主要用于給排水系統使用。溫度≤80℃，公稱壓力≤PN25，通徑≤800mm。閥體材料為鑄鐵或球鐵，鑄鋼或不銹鋼。采用標準：CJ/T216-2013給水排水用軟密封閘閥，GB/T 24924-2010 供水系統用彈性密封閘閥。AWWA C509:2001。   
    

     主要特征:金屬閘板外表面采用模壓硫化或注壓硫化成型工藝，整體包覆橡膠EPDM或NBR。關閉時依靠閘板密封面橡膠的彈性變形完成密封。耐腐蝕，密封性好，可以實現零泄漏。閘板為楔形，減少了閥板密封面磨損。

　　The soft-seal resilient-seated gate valve is primarily used in water supply and drainage systems. It operates at temperatures up to 80°C, with a nominal pressure not exceeding PN25, and a diameter not exceeding 800mm. The valve body is constructed from cast iron or ductile iron, cast steel, or stainless steel. The applicable standards include CJ/T216-2013 for soft-seal gate valves used in water supply and drainage, GB/T 24924-2010 for resilient-sealed gate valves used in water supply systems, and AWWA C509:2001. Main features: The outer surface of the metal gate plate is molded or injection-molded using vulcanization processes, and is entirely coated with rubber EPDM or NBR. When closed, sealing is achieved through elastic deformation of the rubber on the sealing surface of the gate plate. It is corrosion-resistant, has good sealing performance, and can achieve zero leakage. The gate plate is wedge-shaped, reducing wear on the sealing surface of the valve plate.

　　其閥體底部沒有凹槽，介質中的細小顆粒會隨著介質一同通過閥體，不會積存雜質，閥座處流道內徑等同于管道，與公稱尺寸一致。幾乎無流阻。

　　The valve body has no groove at the bottom, so fine particles in the medium can pass through the valve body along with the medium without accumulating impurities. The inner diameter of the flow passage at the valve seat is equivalent to that of the pipeline, consistent with the nominal size. There is almost no flow resistance.

　　采用環氧樹脂粉末靜電噴涂。涂層固化后不溶解于水，不影響水質。環氧樹脂粉末涂料是干態固體超細粉末，涂裝時利用靜電噴槍在壓縮空氣帶動下，使帶電的涂料顆粒吸附在閥體表面。再將閥體送入爐子里烘烤，溫度在180°～200°使涂料熔化，在閥體表面形成涂層。

　　Epoxy resin powder electrostatic spraying is adopted. After curing, the coating does not dissolve in water and does not affect water quality. Epoxy resin powder coating is a dry solid ultrafine powder. During coating, the charged coating particles are adsorbed onto the surface of the valve body using an electrostatic spray gun driven by compressed air. Then, the valve body is sent into an oven and baked at a temperature of 180°~200° to melt the coating, forming a coating layer on the surface of the valve body.

　　環氧粉末涂料具有如下優點：熔融粘度較低因而其涂膜流平性好，對金屬底材的附著力非常好，因此不需涂底漆。漆膜的硬度高、耐劃傷性好和耐沖擊強度等力學性能好，漆膜耐水、耐酸、耐堿和耐鹽水性良好。

　　Epoxy powder coating has the following advantages: it has a low melt viscosity, resulting in good film leveling properties, and excellent adhesion to metal substrates, thus eliminating the need for primer. The paint film exhibits high hardness, good scratch resistance, and impact resistance, as well as good mechanical properties such as water resistance, acid resistance, alkali resistance, and saltwater resistance.

　　閘閥閥桿位置采用三道O形圈密封。

　　有效防止閥桿位置外漏。同時頂端設置防塵圈防止雜質灰塵進入。可以帶壓在線更換。

　　The gate valve stem position is sealed with three O-rings, effectively preventing external leakage at the valve stem position. Additionally, a dust-proof ring is installed at the top to prevent the entry of impurities and dust. It allows for online replacement under pressure.

　　彈性軟密封閘閥主要替代主要是：GB/T12232-2005通用閥門 法蘭連接鐵制閘閥。包括公稱壓力 PN1～25，公稱通徑 DN50～2000 法蘭連接灰鑄鐵和球墨鑄鐵制閘閥。

　　The main replacement for resilient soft-seal gate valves is the GB/T12232-2005 standard general-purpose valves - flange-connected iron gate valves. This includes gate valves with nominal pressures ranging from PN1 to 25 and nominal diameters from DN50 to 2000, made of gray cast iron or ductile iron and flange-connected.

　　二者主要區別：1. 軟密封彈性座封閘閥的閘板整體包裹橡膠，與閥體密封面形成軟密封，密封性好。維修時一般只需更換新的閘板即可，維修方便。     硬密封閘閥閥體和閘板密封面采用本體材料，銅合金，不銹鋼制成。磨損后需要閥體和閘板同時維修，比較復雜。

　　The main differences between the two are as follows: 1. The gate plate of the soft-seal resilient seat gate valve is entirely wrapped in rubber, forming a soft seal with the sealing surface of the valve body, ensuring good sealing performance. During maintenance, it is generally only necessary to replace the gate plate with a new one, making maintenance convenient. The valve body and gate plate sealing surfaces of the hard-seal gate valve are made of the same material as the valve body, copper alloy, or stainless steel. After wear, both the valve body and gate plate need to be repaired simultaneously, which is more complicated.

　　2. 軟密封彈性座封閘閥閥體采用無溝槽設計。

　　不會造成雜質積聚。

　　2. The valve body of the soft-seal resilient-seated gate valve adopts a groove-free design, which prevents the accumulation of impurities.

　　硬密封閘閥由于閥體兩側密封面原因，閥體底部有凹槽，時間長了，一些雜質會沉積在凹槽內。

　　擋住閘板下降，造成密封失效。

　　Due to the sealing surfaces on both sides of the valve body, the bottom of the hard seal gate valve has a groove. Over time, some impurities will deposit in the groove, blocking the descent of the gate plate and causing sealing failure.

　　3. 軟密封彈性座封閘閥閥體噴涂環氧樹脂涂料。環氧樹脂涂料耐腐蝕，無污染，可用于自來水管道。

　　3. The body of the soft-seal resilient seat gate valve is sprayed with epoxy resin coating. Epoxy resin coating is corrosion-resistant and non-polluting, and can be used for water pipelines.

　　硬密封閘閥多是噴涂油漆，對水質有一定污染，但是現在自來水管路的硬密封閘閥也開始噴涂環氧樹脂。

　　Hard seal gate valves are often painted, which can cause certain pollution to water quality. However, now epoxy resin is also being sprayed on hard seal gate valves in tap water pipelines.

　　4. 軟密封彈性座封閘閥標準規定閥桿軸封至少三道O型圈密封，可以在工作壓力下，閘閥全開時進行更換。

　　4. According to the standard for soft-seal resilient seated gate valves, the valve stem shaft seal should consist of at least three O-rings, which can be replaced when the gate valve is fully opened under working pressure.

　　硬密封閘閥標準GB/T12232-2005則規定不少于二道密封圈。同樣要設置防塵密封。

　　The standard for hard seal gate valves, GB/T12232-2005, stipulates that there should be no fewer than two sealing rings. Dust-proof seals are also required.

　　5. 軟密封彈性座封閘閥上閥蓋采用內六角螺釘。擰緊后，上面灌蠟密封。

　　使螺釘和閥體螺紋間不易生銹。方便以后螺釘拆卸維修。

　　5. The upper valve cover of the soft-seal resilient seated gate valve adopts hexagonal socket screws. After tightening, wax is poured on top for sealing, making it difficult for rust to form between the screw and the valve body threads. This facilitates future screw disassembly and maintenance.

　　原硬密封閘閥通常采用六角螺栓。但也有部分硬密封閘閥采用類似結構。

　　The original hard seal gate valve typically employs hexagonal bolts. However, some hard seal gate valves adopt a similar structure.

　　6. 適用介質溫度不同。在自來水管線上，軟密封閘閥應用越來越多。部分高溫介質管路硬密封閘閥亦然是主要產品。

　　6. The applicable medium temperatures vary. In water supply pipelines, soft-seal gate valves are increasingly being used. Similarly, hard-seal gate valves are also the main products for some high-temperature medium pipelines.

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