Product Information of Nanfang industrial water pressure control valve papermaking
Nan Fang's valve suppliers can be used in different fields.Nan Fang could customize comprehensive and efficient solutions according to customers' different needs.
A comprehensive after-sales service system is established based on customers' needs. We are committed to providing quality services including consulting, technical guidance, product delivery, product replacement and so on. This enables us to establish a good corporate image.
Company Advantages 1. Digital molding technique and meta-mechanical analysis are used in the development of Nanfang water pressure control valve by the R&D team. The team strives to create a product with high precision which suits most people's foot arch. 2. The product is strictly checked by the quality inspection department. From the raw material to the shipment process, the defective product is not allowed to enter the market. 3. Hangzhou Fuyang Nan Fang Valve Industry Co., Ltd has continually grown and expanded in the international competition.
Company Features 1. Hangzhou Fuyang Nan Fang Valve Industry Co., Ltd is an expert in producing cage type control valve of great craftsmanship. 2. We have an independent research and development team. They are able to develop and innovate some new products with distinctiveness and improve the original old products for new upgrades. This enables us to keep update our product categories. 3. Hangzhou Fuyang Nan Fang Valve Industry Co., Ltd is unswervingly pursuing the strategic goals of water pressure control valve . Welcome to visit our factory! What we have been trying to do is that Nanfang will always put cage type control valve first. Welcome to visit our factory!
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.