Product Information of Nanfang motorized ball valve tool LNG
Nan Fang's industrial valves manufacturer can be widely used in various fields.Nan Fang insists on providing customers with reasonable solutions according to their actual needs.
Company Advantages 1. motorized ball valve exceed other similar products with its lined ball valves materials. 2. A rigorous quality control process ensures zero defects and consistent quality. 3. The product is internationally recognized for its excellent performance and long service life. 4. With the previously mentioned characteristics, the product is ardently loved by decoration engineers, home designers, and architectural decoration designers. 5. It performs satisfactorily in normal use. A good fit is achieved as the subjects will feel comfortable in it and tasks can be performed well.
Company Features 1. Hangzhou Fuyang Nan Fang Valve Industry Co., Ltd has become one of the most competitive lined ball valves manufacturer in China. We have reputable as the one with excellent manufacturing ability. 2. Depending on our excellent technology, motorized ball valve is of great quality. 3. Our business philosophy is to provide our customers with the highest level of products and services. We constantly work with our clients by providing effective solutions and cost benefits. We will adhere to the highest standards of ethics and business conduct. We always do business within the laws and stoutly reject any illegal and vicious competition. Protecting the environment is an important task of our corporate strategy. We have efforts in sourcing more environmental-friendly raw materials, seeking more efficient packaging ways, and ensuring optimum use of resources. We connect everything – people, process, data, and things – and we use those connections to change our world for the better. We don’t just dream it, we do it every day. And we’re doing it faster than ever before, in ways no one else can. Contact!
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.