Product Information of Nanfang best hand operated gate valve supplier coal chemical industry
Nan Fang's control valve is widely used in the Manufacturing Valves industry.With a focus on control valve, Nan Fang is dedicated to providing reasonable solutions for customers.
Company Advantages 1. Nanfang bronze gate valve is manufactured as per the international norms and well-defined industry parameters . 2. To ensure the product quality, advanced management method of ISO 9000 has been introduced. 3. Due to the strict quality control system, the performance of the product is greatly improved. 4. We have the ability to supply hand operated gate valve offered by our professional producers with the help of partners.
Company Features 1. Under the strict test of bronze gate valve , Nanfang has the capability of manufacturing the selected hand operated gate valve . 2. We have design specialists. They fuse their creative flair with high-tech, focus on the details, precision, and functionality of each product, helping the company to develop only the best quality products. 3. Our focus on sustainable business practices covers all areas of our business. From maintaining safe working conditions to focusing on becoming a good environmental manager, we are working hard for a sustainable tomorrow. Get an offer! Our current aim is to expand the overseas market through product innovation and competitive prices by walking in front of market trends and grasping the market opportunity. Get an offer! We emphasize the values of Integrity, Respect, Teamwork, Innovation, and Courage. To help our employees grow, we believe it's vital to strengthen their engagement and develop their skills and leadership capabilities. Get an offer! Over the years, all of our business activities comply with the letter of the law and the spirit of equal and friendly cooperation. We call for moral cooperation and business. We will uncompromisingly refuse any vicious competition.
In the past, the main consideration for control valve packing selection is the operating temperature of packing. When the temperature is lower than 200℃, use PTFE packing; When the temperature is higher than 200℃, the packing is graphite. Now, when selecting the packing, not only to consider the working temperature, but also to consider the affection of process control by the friction of packing, such as hysteresis, sealing quality, service life, and so on.The principle of choosing packing is to reduce the friction and prolong the service life as far as possible under the premise of ensuring the required level of leakage.For the friction of a graphite packing, it is much greater than that of a PTFE packing, so PTFE packing should be used as long as the temperature permits.Summarize the main points of packing structure design and application:1. Different packing boxes and packing structures are suitable for different applications. The correction selection of the packing box and packing structure, can reduce the friction and prolong the service life under the required sealing performance.2. In the packing structure, the packing layers and length are not the more than better usually packing length is 1.5 times the stem diameter.3. It is very important to improve the surface finish and surface accuracy of the stem and packing box. For PTFE packing, the finish of stem and the packing box is not enough, and it will reduce the sealing performance and cause increasing leakage;4. The design of the packing structure should be able to automatically adjust the compression force and compensate for the reduction of the compression force caused by wear, etc., so as to facilitate on-site maintenance and installation.5. The improper installation of the control valve will cause uneven friction, for example, when the horizontal installation, the stem dead weight will increase pressure on the lower line of packing, increase friction; And for the upper line of the packing, it has poor sealing performance due to the pressing force reduction.
Installation of NPS6 (DN150) soft seated ball valves with pneumatic actuator at a chemical factory.Soft seated ball valve, taking a rotation movement of 90 degrees, maintain a ball as its plug body with a round hole passing through its axis. The Nanfang soft seated ball valves take a main function of distribution, cutting off and transition of medium’s flowing. With a small rotation of 90 degrees and turning torque, soft seated ball valves share a well-performed sealing effect. Recently, the relevant development of soft seated ball valves has been endowed with the characteristics of flow throttling and controlling.Soft seated ball valves share such characteristics with tight configuration, stable sealing, and convenient repairing. The sealing surface of soft seated ball valves maintains a closing position between ball’s surfaces without any flushes by the mediums, employed in the working mediums of water, solvents, acids, gas and etc, as well as mediums under tough working environment such as oxygen, methane, ethylene and etc. The soft seated ball valves can share an integral structure or a combined type.