The flat gate valve is a sliding valve whose closing part is a parallel wedge. The closing part can be a single gate or a double gate with a spreading mechanism in between. Flat gate valves can be divided into flat gate valves with diversion holes and flat gate valves without diversion holes according to the gate structure. Balanced plate valves with diversion holes are used for pipelines transporting oil and natural gas. For pipelines that do not require sweepers, flat gate valves without diversion holes can be used. Features of Flat Gate Valve 1. Small flow resistance. Since the wedge slides on the two valve seat surfaces, the flat gate valve is also suitable for fluids with suspended particles. 2. It has a double block and bleed function. 3. Fireproof design. When the O-ring and PTFE are burned, under the action of fluid pressure, the wedge and the retainer, the retainer and the valve body form a metal seal, thereby isolating the fluid. In addition, the middle flange gasket and packing are made of graphite and metal materials to prevent external leakage. 4. Self-releasing function: When the pressure in the middle cavity is high, the fixer will be pressed back under the action of the fluid in the middle cavity, so as to avoid accidents caused by excessive pressure in the middle cavity.

The pipe plug valve is a shut-off valve used for long-distance natural gas pipeline and station control system, which is a special valve to meet the special requirements of natural gas pipeline. The valve is required to have special technical performance such as adaptability to harsh environment, service life of more than 30 years, two-way zero leakage, fire resistance and anti-static, acid medium corrosion resistance, and labor saving operation. The pipeline plug valve has the following characteristics compared with the traditional bushing plug valve: ① It has reliable sealing, long service life and is sealed by the cone surface. The sealing contact surface is large, and the oil film plays the role of lubrication and sealing. ② The valve torque is small and the operation is labor-saving. The plug cone is installed upside down. ③ The valve cover at the bottom of the valve body is equipped with an adjusting support, which can adjust the position of the valve core. Under high temperature working conditions, the thermal expansion of the plug can avoid the sealing pair from being wedged by its lifting. ④ The design of valve stem anti fly out, O-ring and graphite packing, and triple valve stem seal filled with sealing grease meet the leakage requirements. It can work reliably for a long time without fastening and maintenance, and has fire protection function.

The plug valve is a quick opening and closing straight through valve. Because the movement between sealing surfaces has a wiping effect, the sealing surface can completely prevent contact with the flowing medium when it is fully opened, so it can usually be used for media with suspended particles. Plug valves are also widely used in industry. Performance Characteristics of Plug Valve: 1. Excellent high and low temperature performance, good pressure resistance. 2. Excellent sealing performance. 3. The material has strong adaptability and wide temperature range. The applicable temperature range of the material is - 40~+200 ℃. Application of Plug Valve: 1. Plug valves are widely used in oilfield exploitation, transportation and refining equipment, petrochemical industry, gas, natural gas, liquefied petroleum gas, HVAC industry and general industry. 2. The plug valve is also suitable for conveying liquids containing suspended solids and particles. The straight through plug valve can transport materials containing crystals with thermal insulation measures. The application scope of the plug valve is becoming wider and wider, and the oil seal plug valve with forced lubrication has also appeared, which has better sealing performance, saves effort in opening and closing, and prevents the sealing surface from being damaged.

On September 19, 2022, DERVOS obtained a new certificate -- UKCA certificate. UKCA is in accordance with the requirements of the Pressure Equipment (Safety) Regulations 2016. It mainly indicates that the product meets the requirements of the United Kingdom market. See the following table of Product scope: Product and Type (used for mediums of liquid, steam, gas and oil) Check valve H44 used at -46~538°C PN20 and PN50, DN32~DN800 (CL150 and CL300, 1-1/4"~32") PN100, DN32~DN600 (CL600, 1-1/4"~24") PN150, DN32~DN500 (CL900, 1-1/4"~20") PN250 and PN420, DN32~DN300 (CL1500 and CL2500, 1-1/4"~12") Ball valve Q347 used at -29~200°C PN20 and PN50, DN32~DN500 (CL150 and CL300, 1-1/4"~20") PN100, DN32~DN400 (CL600, 1-1/4"-16") PN150/PN250/PN420, DN32~DN300 (CL900/CL1500/CL2500, 1-1/4"~12") Globe valve J41 used at -46~538°C PN20 and PN50, DN32~DN600 (CL150 and CL300, 1-1/4"~24") PN100 and PN250, DN32~DN400 (CL600~1500, 1-1/4"~16") PN420, DN32~DN300 (CL2500, 1-1/4"~12") Gate valve Z40 used at -46~538°C PN20, DN32~DN1400 (CL150, 1-1/4"~56") PN50, DN32~DN1050 (CL300, 1-1/4"~42") PN100, DN32~DN750 (CL600, 1-1/4"~30") PN150 and PN250, DN32~DN600 (CL900 and CL1500, 1-1/4"~24") PN420, DN32~DN300 (CL2500, 1-1/4"~12") Strainer G41 used at -46~538°C PN20 and PN50, DN32~DN600 (CL150 and CL300, 1-1/4"~24") PN100, DN32~DN500 (CL600, 1-1/4"~20") PN150 and PN250, DN32~DN300 (CL900 and CL1500, 1-1/4"~12") PN420, DN32~DN250 (CL2500, 1-1/4"~10") Plug Valve X47 used at -29~200°C PN20 and PN50, DN32~DN500 (CL150 and CL300, 1-1/4"~20") PN100, DN32~DN400 (CL600, 1-1/4"~16") PN150/PN250/PN420, DN32~DN300 (CL900/CL1500/CL2500, 1-1/4"~12") So far, DERVOS has obtained several certificates, including ISO 9001, ISO 45001, API 6D, PED CE, ATEX, ISO15848-1, API 6FA, API 624, API 607, EAC, UKCA, etc. DERVOS always adhere to the standardized management system, and strictly control product quality in all aspects of valve design, manufacturing, packaging and shipment, meet the requirements of customers and markets in various countries. DERVOS and DERVOS products deserve your trust!

The Mid-Autumn Festival is one of the four traditional festivals in China. On the day of the Mid-Autumn Festival, people in different places have different customs and celebrations, but they all place their infinite love for life and yearning for a better life. So, how does DERVOS celebrate the Mid-Autumn Festival? Bo Bing is an important folk competitive game custom in Fujian. The rule is that everyone rolls the dice in turn and receives the corresponding prize according to the number of dice. At 2:00 pm that day, everyone got ready to draw lots early. According to the result of the draw, we were divided into three tables. With excited cries and laughter, the prepared prizes were gradually won by everyone. Finally, the CHAMPION was won by West, Sheila and Rico. They are so lucky! After the Bo Bing, we went to Eric's house together. This time, we planned to have a "different dinner". We were still divided into three groups according to the results of the draw of Bo Bing, and each group prepared an adept cuisine. After discussion, the first group led by Eric prepared the Northeast specialty: Stewed in Iron Pot; the second group led by Ken was ready to make a hotpot that everyone loves; the third group led by Holly prepared luxurious seafood dishes! With a big direction, everyone was busy, cleaning, arranging the site, preparing food, cooking... everyone was in an orderly way! Finally, after a few hours of hard work, all the dishes of the three groups were finished. They looked very appetizing! And they were so delicious and sweet! It was a very successful meal! After dinner, we arranged another surprise activity, “A Surprise Bo Bing”! Different from the previous one, this Bo Bing set up "Easter eggs": Catwalk Show, Hot Dance Show, A Cup of Special Drink, No Hands to Eat Apples. They showed us the other side beyond work with confidence, joyful and passion. DERVOS always full of surprise. It's the show time! The Mid-Autumn Festival in DERVOS ended with laughter and laughter, a new tomorrow will come as scheduled! Work hard, play hard, DERVOS people takes care of work, life and every day!

Valves are widely used and have many kinds. Ball valve is one of the most important valve products. Next, Dervos will introduce the difference between ball valve and traditional valve! Comparison between ball valve and traditional valve: 1. From the perspective of energy conservation and environmental protection, the ball valve is an energy-saving product. It has good circulation capacity and small flow resistance, which is very important in engineering application. 2. The ball valve has the advantages of small fluid resistance, quick and convenient opening and closing, small external size, light weight, good sealing, long service life, high safety and reliability, and convenient maintenance. Moreover, it is welcomed for its characteristics of self pressure relief and ball cleaning. 3. The opening and closing stem of the ball valve performs rotary motion. Compared with the linear motion valve, it is convenient to open and close and easy to realize the automation of valve operation. 4. It can be used for various media, pressure and temperature conditions, and the valve diameter range is also expanding. In recent years, with the breakthroughs in new structure, new materials and processing technology, ball valves are used more and more widely, and the market share increases year by year. It is one of the fastest developing valve varieties.