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Taizhou Hongjia Valve Co.,Ltd
Add : Ganjiang Industrial Area,Yuhuan,Zhejiang, China
E-mail : hongjia@hongjiavalve.com
Tel : 86-576-87453778
Fax : 86-576-87453939
M.B : 86-136 66847766
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INTRODUCTION
HONGJIA
VALVE
Taizhou Hongjia Valve Co.,Ltd. is located in Ganjiang Industry Zone of Yuhuan in the southeast of Zhejiang which has the name of “A Pearl in East China Sea“ in China. Our company owns strong technical capabilities,advanced equipments, self-operation import&export right, is mainly engaged in manufacturing various PP-R Inserts, Brass valves, Angle valves, Faucets, Brass fittings and water heating accessories. To similar products in China and from foreign countries, we adhere to tenets as "Quality First" , "Strive for innovations".We strictly control selection of materials, go all out to make products more nice, firm and reliable relying strict testing procedures by advanced technologies and equipments. Furthermore, we export products to countries and regions in Europe, America, Middle East and Southeast Asia owing to prominent product quality and reliable enterprise credit and reputation.
Europe
Southeast Asia
Africa
South America
Middle East
North America
Products are exported to Europe, America, Middle East, Southeast Asia,
Africa and other countries and regions.
HONGJIA NETWORK
NEWS CENTER
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News
What kind of packing is good for cryogenic valves?
There are many types of sealing packing used in valves, such as rubber packing, metal packing, V-shaped packing, O-ring, etc., and other carbon fiber packing, ceramic fiber packing, etc. are very suitable for high temperature valves. In the product. So, what kind of packing is good for cryogenic valves? We know that low-temperature valves are mainly used in low-temperature environments. Therefore, their sealing packing must have low-temperature resistance. The more commonly used are paraffin asbestos packing and flexible graphite packing. At present, these two kinds of packing are used in low-temperature valves. It is better, the specific introduction is as follows: 1. Paraffin asbestos filler is made of asbestos fiber impregnated with paraffin wax, used for low temperature and cryogenic valves. This kind of sealing packing has the characteristics of good resistance to weak acid and strong alkali, high strength and good adsorption performance. 2. The temperature resistance of flexible graphite filler is very good. It can not only be applied to -200℃, but also can be used up to 500℃ in high-temperature oxidizing medium, and can be applied to 2000℃ in non-oxidizing medium, and can maintain excellent performance. The tightness. In addition, the flexible graphite packing has unique flexibility and resilience. The cut packing can be freely bent over 90° in the axial direction. During use, it will not leak due to temperature and pressure changes, vibration and other factors, so it is safe and reliable, and is an ideal seal. Material. Of course, in addition, flexible graphite filler also has the characteristics of strong corrosion resistance, low friction coefficient, good self-lubricity, low friction coefficient, good self-lubricity, and long service life.
2021-11-05
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News
Causes and solutions for the spool of cryogenic valve falling off
For cryogenic valves used in some special environments, over time, their switches will often show corrosion and wear. Once this happens, it will inevitably lead to failure of the connection between the valve stem and the valve core, thereby making the cryogenic valve valve The core is falling off. Of course, human factors cannot be ignored. For example, improper operation can also cause this phenomenon. After this happens, the next series of problems will follow. For example, the cryogenic valve cannot be opened after it is closed, and it can only be cut out from the system and replaced; and if it cannot be cut out from the system, there will only be another Process or device shutdown processing. When the valve core of the cryogenic valve falls off and cannot be cut out, how should we deal with it? This is a problem that we urgently need to solve. The following is a solution compiled by Bangwei Valve Factory for your reference. 1. Under the condition that the medium is sealed, do not move the valve body, valve core and valve seat, and change the assembly method of the valve cover, valve stem, copper sleeve, packing and gland; 2. After the above changes, the valve core is exposed, and then the valve stem and the valve core are restored by conventional methods, so that the three parts of the valve can be continuously sealed and the valve can be reopened. 3. After the bonnet of the cryogenic valve is disassembled, except for special valves, the wedge angle of the valve core is within the friction angle region. No matter how the pressure on the two ends of the valve core changes, the valve core will not squeeze from the valve seat under self-locking conditions. Come out, for the flat valve core, there is no squeeze out.
2021-11-05
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News
What are the uses of pneumatic cryogenic gate valves?
The pneumatic low-temperature gate valve is made of stainless steel and has the characteristics of stainless steel, that is, high hardness, high wear resistance, high temperature resistance, strong corrosion resistance, etc. So, what are the uses of such a powerful pneumatic cryogenic gate valve? Next, I will give you a specific introduction. Pneumatic cryogenic gate valves are widely used in petroleum, chemical, mining, electric power, papermaking, pharmaceutical, food, municipal, urban construction, water supply and drainage, mechanical equipment supporting and electronic industries. It is a control component in the pipeline fluid conveying system. Its main function is to change the section of the pipeline passage and the flow direction of the medium. It has various functions such as adjustment, check, stop, diversion, throttling, and diversion. Pneumatic cryogenic gate valve can be used in various types of fluid pipelines such as water, gas, steam, oil, mud, liquid metal, various corrosive media, and radioactive fluid. Its working pressure can be from 0.0013MPa to 1000MPa. high pressure.
2021-11-05