We set up a team to visit Indonesia during 13~20th, Oct, 2019. We planned this trip for such a long time, from presentation to documents, to clothes etc. We also investigated this market in advance and all clients in this country. By this way, we selected valuable clients to meet us. To be honest, before going to Indonesia, we know little about this market. We are confused about the conflict: the data shows this market is potential, while from our experience, we did not get lots of order from this market. That’s why we really want to explore this market. After 7 days, we came back with our understanding about this market, we know much more about Indonesia. There are two levels in Indonesia; high level only cares about brand, and low level only care about price.  There is no doubt that this is a new way for us to do business， and we will keep investigating other markets in the future. 

The Preparation of Ball Valve before Installation 1. Ensure that the pipeline at the installation position of the ball valve is in the coaxial position. The two flanges on the pipeline should be parallel, and confirm that the pipeline can bear the weight of the ball valve. 2. Check whether there are impurities and welding slag in the pipeline, and the regulating valve must purge the pipeline. 3. Check the nameplate of the ball valve, and fully open and close the ball valve for several times to confirm that the valve can work normally, and thoroughly check all the details of the valve to ensure that the valve is intact. 4. Remove the protective cover at both ends of the valve, check whether the body is clean, clean the body cavity, because the sealing surface of the ball valve is ball shape, even small debris may cause damage to the sealing surface. Installation of Ball Valve 1. Any section of the ball valve can be installed in the upstream end, Shanghai nimei ball valve handle ball valve can be installed in any position of the pipeline, if equipped with actuator (such as gear box, electric-pneumatic actuator) ball valve, it must be installed vertically, valve inlet and outlet in a horizontal position. 2. Between the ball valve flange and the pipeline flange according to the design requirements of the pipeline with sealing gasket. 3. Bolts on the flange shall be tightened symmetrically, successively and uniformly. 4. If the ball valve with pneumatic, electric and other actuators, according to the manual to complete the installation of air source, power supply. Inspection After Installation Of Ball Valve 1.After installation, start the ball valve open and close several times, should be flexible, uniform force, ball valve work normally. 2. According to the design requirements of pipeline pressure, test the sealing performance of the joint surface of ball valve and pipeline flange after passing through pressure. Ball Valve Maintenance 1. Only by removing the pressure before and after the ball valve can the ball valve be disassembled and decomposed. 2. In the decomposition and reassembly process of the ball valve, it is necessary to protect the sealed parts, especially non-metallic parts, such as o-ring and other parts, with special tools. 3. Bolts must be tightened symmetrically, step by step and evenly when the ball valve body is reassembled. 4. Cleaning agent should be compatible with rubber parts, plastic parts, metal parts and working medium (such as gas) in the ball valve.When the working medium is gas, gasoline (gb484-89) can be used to clean the metal parts.Clean nonmetallic parts with purified water or alcohol. 5. The decomposed individual parts can be cleaned by immersion washing.The metal parts that have not been decomposed can be cleaned by a clean and fine dip silk cloth with cleaning agent (to avoid fiber falling off and sticking to the parts).When cleaning, remove all the grease, dirt, glue, dust etc. 6, non-metallic parts should be imm...

Dervos Integration Center officially opened on the day of Oct 29th, 2019!!! In this center, we aim to provide our customer with a unified valve product by integrating the purchasing, quality inspection, painting and packaging. The key role of Dervos Integration Center is to unify the product from perspectives of: -Appearance of Products -Serial Number & Nameplate - Painting - Packaging Accessories - Plywood Case - Re-inspection - Actuator For more detailed information of our Integration Center, please refer to the page: We believe by having this center, all of the products provided by Dervos will have the same outlook and give both our customers and end users with good first impression. Also, the careful testing, painting and packing can avoid unnecessary complaints like leaking, painting falling off and broken boxes. All this will bring our client and us more valuable orders! On that day, we invited some of our clients and suppliers to share this important moment with us. We showed our clients around in the factory. We had a very brief introduction of our raw material system in our sample room. We participated the opening ceremony together. We threw a big party by having delicate dinner, drinking, and playing games together. What a wonderful day! This precious time spent with all these friends will be deeply engraved on the memory of each of us!

Hydrogen service is a condition in which the medium contains hydrogen. Hydrogen-dependent equipment refers to the equipment containing hydrogen in the medium, including the hydrogenation reactor, the hydrogenation heat exchanger and the hydrogenation separator. Under high temperature and high pressure conditions, hydrogen is easy to produce hydrogen and hydrogen sulfide corrosion with steel equipment, resulting in steel strength reduction, or even damage to equipment It can be divided into hydrogen-dependent process and non-hydrogen-dependent process. Due to the particularity of hydrogen medium (small molecule, easy penetration, hydrogen embrittlement, explosive, etc.), high quality requirements are required for the valve body and valve cover: Forgings are preferred for body & bonnet material. Casting can be selected for large-caliber valves, but RT secondary sheet standard is required. Valve design and manufacturing can not have sharp chamfering, all chamfering needs to be smooth, parts processing accuracy and surface are very high requirements; Valves need to be cleaned strictly; During the pressure test, the strength test should be done for gas strength test, not just for water strength test. In the case of hydrogen valve, the requirements will be higher. The material of valve shall control the content of C, S and P, and conduct crystal phase test, etc. Valves with hydrogen media can also be tested with hydrogen according to SHELL 77/308 specifications. Must pay attention to fire safe, blow-out proof, and anti - static.

The jacket valve has good heat preservation and cold preservation characteristics, and the diameter of the valve is consistent with the diameter of the pipe, and at the same time, the heat loss of the medium in the pipeline can be effectively reduced. It has good thermal insulation properties and can effectively reduce the heat loss of the medium in the pipeline. Insulation valves are widely used in various systems such as petroleum, chemical, metallurgy, and pharmaceuticals, effectively reducing the loss of heat in the pipeline and preventing the appearance of crystals and solidification of the medium. The function of the heat preservation valve is that when the valve passes through the valve at a high or low temperature, the material in the heat preservation valve has a heat insulation effect on the medium, so that the medium does not condense or stick to the inside of the valve body, so that the opening and closing of the valve can operate normally.

Mid-Autumn Festival fell on Sep 13th, 2019 this year. On the previous day Sep 12th, our company held a celebration activity by having moon cake gambling and dinner together. On this day in China, family gets reunion to have dinner, eat moon cake and enjoy the glorious full moon. And people in different districts have different ways to celebrate this festival.  In Xiamen, we have a special custom, moon cake gambling. Money or various daily necessities can be regarded as the prize for those gambling winners. Likewise, we held a moon cake gambling games in Dervos. The prizes are of variety and attracting, including floor mopping robot, mountain bike, electric cooker, humidifier and etc. The day ended with a terrific dinner party. Delicious food, beautiful songs, pictures and Dervos people....