Showing 161–180 of 175 results

Protective Measures for Valves Installation

Brief description: 1. When installing the valve, a filter and a flush valve are required to prevent metal, sand and other foreign matters from invading and damaging the sealing surface. 2. In order to keep compressed air purified, an oil-water separator or an air filter needs to be installed in front of the valve. 3. Considering that the working state of the valve can be checked during operation, instruments and check valves need to be set up. 4. In order to maintain the operating temperature,...

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Brief Introduction about Valve Cleaning Procedure

Valves are widely used in our daily life. This "switch", which is mostly used to control the flow of liquid, plays a vital role in the whole fluid operation. Do you know all about the cleaning work of the newly bought valve before installation?     Valve cleaning work is very important, which determines whether the valve can play its due role in future operation. So, what should be paid attention to in general cleaning work? First of all, we know that the valve...

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Rules for Maintenance of Forged Steel Gate Valves

1. When the forged steel gate valve is to be stopped for using, first close the gate valve and pressure gauge, and then stop the motor.   2.When the forged steel gate valve is laid up for a long time or used in cold winter season, the drain plug at the lower part of the pump shall be unscrewed to release the medium, which prevent frost cracking (In case of sewage, please clean the valve body with clean water).   3. Listen carefully to see if the running sound of the...

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Installation of Forged Steel Gate Valve

1. Handwheel, handle and transmission machine are not allowed to be used in lifting state while any collision is strictly prohibited.   2. Double gate valve should be installed vertically (i.e. valve stem is in a vertical position with handwheel at the top).   3. The gate valve with a bypass valve should give priority to the opening of the bypass valve (to balance the differential pressure between the inlet and outlet and to reduce the opening force).  ...

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What are the Differences between Forged Steel Ball Valves and High Pressure Ball Valves? (Part Two)

Note the following points in the use and maintenance of high pressure ball valves.  When ball valves are closed, there still pressure fluid exits inside the valve body. Lubricate high pressure ball valves with lubricating grease. The lubrication grease should be compatible with metal materials, rubber parts, plastic parts and working media of ball valves. Lubricate grease on the surface of the sealing elements' installing groove, rubber sealing elements as well as the sealing surface and...

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What are Differences between Forged Steel Ball Valves and High Pressure Ball Valves?(Part One)

Both forged steel ball valves and high pressure ball valves are widely applied to industries. What are the differences between these two kinds of valves? Materials of the valve body of the ball valve can be roughly divided into two kinds: casting materials and forging materials. Materials of forged steel ball valves are made by forging, and there are various forging materials including A105, LF2, F304 and F316. Forged steel ball valves can be made into valves of high pressure, medium pressure and...

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Installation and Maintenance Instructions of Forged Steel Ball Valves (Part Two)

When forged steel ball valves are used, many problems are not caused by their own quality but their inappropriate installation and use. Inappropriate installation environment and positions, wrong directions or unclean pipelines can lead to problems of forged steel ball valves. Therefore, following aspects should be paid attention to when forged steel ball valves are installed and used. Forged steel ball valves belong to field instruments, which demand that environmental temperature should be within...

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Installation and Maintenance Instructions of Forged Steel Ball Valves (Part One)

If forged steel ball valves in the original system are heavily maintained, the sealing performance of the stuffing boxes as well as the parts such as joints are supposed to be checked carefully. In order to make sure that forged steel ball valves can be operated normally and the pipeline system can run smoothly, whether the information on the data plates of forged steel ball valves is in consistent with the design requirements should be checked first before the new forged steel ball valves are operated...

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Nine Advantages of Forged Steel Ball Valves

One of the advantages of the forged steel ball valve is its small flow resistance which can be zero actually. The sealing performance of the forged steel ball valve is reliable because most valve seats of forged steel ball valves are made of PTFE elastomer so that the effect of complete sealing can be achieved under high pressure and temperatures.  The forged steel ball valve has good corrosion resistance and long service lives. The major material of the forged steel ball valve's valve...

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Matters Needing Attention of Forged Steel Gate Valves (Part Two)

After the pressure test of forged steel gate valves, the pressure of the gas and water in the sea cavity rises as the temperature rises. In order to grease the valve smoothly, the valve cavity should be empty and the pressure of the valve need to be reduced before the valve is greased. Reducing the pressure of the gate valve in time can ensure the safety of the forged steel gate valve and the greasing process. After the greasing process, the gas and water in the seal cavity are completely replaced...

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Matters Needing Attention of Forged Steel Gate Valves

The disc of the forged steel gate valve is the gate, whose direction of movement is perpendicular to the flowing direction of the fluid. The forged steel gate valve can only be fully open or fully closed, and it can not be used as control valves and throttle valves. There are two sealing surfaces of forged steel gate valves' gates, and the most common pattern is that the two sealing surfaces of gate valves become wedge-shaped or wedge-angled changing with the parameter of valves. The driving...

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The Connection Design of Forged Steel Gate Valves

The forged steel gate valve is one kind of gate valves. Gate valves can be classified into forged steel gate valves, cast iron gate valves, ductile cast iron gate valves, stainless steel gate valves, etc. according to their materials. The disc of forged steel gate valve is the gate. The gate's direction of movement is perpendicular to the direction of the fluid. Forged steel gate valves can only be fully opened and closed, and can not be used for regulation and throttling. The gate of the forged...

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Why Forged Steel Ball Valve Led to Constant Innovation?

From the global economic crisis of years ago to later ease-up, and the economic upturn now, the changes of economy have resulted in the growth and development of valve industry. But why forged steel ball valve, the common valve, led to constant innovation of traditional valve industry? Traditional manufacturers of forged steel ball valve has been in a relatively flat period through the first few years. From the perspective of the production process, compared with stainless steel ball valve, forged...

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Considerations for Using Forged Steel Cryogenic Valve

Forged steel cryogenic gate mainly used for truncating or connecting the media of various pipe projects in thermal power station. Types are forged steel cryogenic gate valve, forge the steel cryogenic ball valve, forged steel cryogenic globe valve, forged steel insulation valve, etc. Types of products’ connection: screw type and solder type. This valve applied widely for water, steam and other non-corrosive media. Characteristics: 1. High temperature, high pressure. 2. Unique sealing technology....

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How to Master the Marketing of Valves?

In valves' market, the development of enterprises has trapped in an awkward situation with the rising cost of labor and raw materials. Under this circumstance, it’s important for those manufacturing enterprises, which produce gate valves, ball valves, globe valves, check valves and butterfly valves, to be keenly aware of market crisis. Under such severe marketing environment, businesses should recognize themselves so that they can walk away from risks. The very first thing is marketing,...

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