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Working Principle and Structural Characteristics of Wedge Gate Valve
Working Principle and Structural Characteristics of Wedge Gate Valve
2023-01-14

Wedge gate valve is a kind of gate valve. It is named for its sealing surface and vertical center line at a certain angle, that is, the two sealing surfaces are wedge-shaped. Wedge gate valves are divided into rising stem wedge gate valves and non-rising stem wedge gate valves. In the rising stem wedge gate valve, the stem moves up and down, and the stem nut is fixed. The non-rising stem gate valve has a fixed stem, and the disc moves up and down to complete the opening and closing. The driving methods include: electric, pneumatic, manual, gas-hydraulic, etc., and the connection methods adopt flange type, welding type, and wafer type. Working Principle The opening and closing part of the wedge gate valve is the wedge, and the movement direction of the gate is perpendicular to the direction of the fluid. Wedge gate valve can only be fully opened and fully closed, not suitable for regulation and throttling. Wedge gate valve generally completes the opening and closing of the valve by moving the valve stem up and down with the rotating hand wheel. Structural Characteristics 1. Compact structure, reasonable design, light and flexible, good rigidity of the valve, smooth passage, small flow coefficient; 2. The sealing surface is made of stainless steel and hard alloy, which has a long service life; 3. With flexible graphite packing, the seal is reliable. Application Range Wedge gate valve is widely used in electric power, petroleum, chemical industry, metallurgy, mining, sewage treatment and other industrial fields, especially in the ash removal and coal washing plant equipment of power stations.

Features of Resilient Seated Sealing Gate Valve
Features of Resilient Seated Sealing Gate Valve
2022-12-22

Resilient seated sealing gate valve utilizes the compensation effect of the elastic deformation of the overall rubber covering of the gate to achieve a good sealing effect, and overcomes the problems of poor sealing, water leakage and rust in general gate valves. Resilient seated sealing gate valve can be widely used in tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electric power, shipbuilding, metallurgy, energy system and other working conditions, and it is used as a shut-off device on the fluid pipeline. Features of Resilient Seated Sealing Gate Valve: 1. Flat-bottom valve seat, no dirt accumulation, more reliable sealing. 2. The wedge is covered with nitrile rubber as a whole, and the internal parts of the valve are made of corrosion-resistant stainless steel and copper alloy materials, which can be used in the sewage system and adapt to the harsh working environment. 3. Small size, light weight, easy to install and maintain. 4. The valve stem is sealed with three O-rings, which greatly reduces the friction resistance when switching, and the switch is light and water-proof. 5. The valve body is made of precision casting, and the precise geometric dimensions make the valve body tight without any finishing work. 6. The copper nut and the elastic wedge are embedded in the joint, so that the two are closely integrated into one body, and there is no loosening or damage caused by the vibration caused by the water flow. 7. The valve body is coated with powder epoxy resin, which can prevent corrosion and rust of the valve body and can be used in sewage system. 8. The inside of the valve body is coated with non-toxic epoxy resin, and the inner and outer surfaces of the valve are completely covered with rubber, which will not rust or corrode, and can be used for raw drinking.

الهدايا والتمنيات من سانتا كلوز ديرفوس
الهدايا والتمنيات من سانتا كلوز ديرفوس
2022-12-16

عيد الميلاد الذي طال انتظاره قادم! هذا العام ، من أجل السماح لشركائنا في العمل بتلقي الهدايا قبل عيد الميلاد ، بدأت DERVOS في الاستعداد قبل شهر واحد! أولا ، اختيار الهدايا. في الواقع ، غالبًا ما تولي مبيعاتنا اهتمامًا لتفضيلات واحتياجات عملائها أثناء الاتصال اليومي ، حتى يتمكنوا أيضًا من اختيار الهدايا التي تلبي رغبات العملاء بالإضافة إلى أنها مليئة بالخصائص الصينية التقليدية. ثانيا تغليف الهدايا. من أجل السماح لك بالحصول على أروع الهدايا ، حافظ على فرحة الهدايا الافتتاحية ، كل هدية يتم تغليفها بشكل جميل. بالإضافة إلى ذلك ، هناك بطاقات تهنئة مكتوبة بخط اليد لكل عملية بيع. وأخيرا تسليم الهدايا. من أجل منع هدايا عيد الميلاد من التأثير أثناء النقل ، قامت DERVOS بلف عدة طبقات من قطن اللؤلؤ المقاوم للصدمات وفيلم عازل على الطبقة الخارجية من هدايا عيد الميلاد ، حتى يتمكن شركاؤنا من الحصول على علبة هدايا مثالية. تتطلع DERVOS إلى رؤية وجوهك المبتسمة عندما تتلقى الهدية. اعتبارًا من اليوم ، تلقى DERVOS الكثير من الشكر والثناء من الأصدقاء! ونأمل أن ترافقك هدايا DERVOS خلال عيد الميلاد الرائع. DERVOS تتمنى لك ولأحبائك بمناسبة عيد ميلاد مجيد وعام جديد مزدهر مقدمًا!

DERVOS ball valves materials include Carbon Steel, Alloy Steel, Low-temperature Carbon Steel, Stainless Steel, 20 Alloy, Duplex Stainless Steel, Aluminum Bronze, etc. Cast steel materials include: WCB, CF8, CF8M, CF3, CF3M, C5, WC6, WC9, LCB. Forged steel materials include: A105, F304, F316, F304L, F316L, F5, F11, F22, LF2. DERVOS ball valves can be customized according to your needs. You may have questions, how does DERVOS strictly control the ball valve quality? As a professional manufacturer of ball valve, it is demonstrated by DERVOS Certificates -- API6D, PED CE, UKCA, EAC, API624, API607, API6FA, ISO9001, ISO45001, ISO15848, ATEX, etc.

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