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Difference between Globe Valves and Throttle Valves

Difference between Globe Valves and Throttle Valves

Globe valve, also called stop valve, is one of the most widely used valves. It is popular because of its durability, easy manufacture, convenient maintenance and low friction between sealing surfaces during opening and closing. It is not only suitable for medium and low pressures, but also suitable for high pressures. The working principle of the globe valve is to make the...

Types of Plug Valves

Types of Plug Valves

Plug valves have lubricated and non-lubricated designs and are with various types of port openings through the plugs. Lubricated Plug Valve The plug in a lubricated plug valve has a cavity in the middle along its axis. You can see this in the image. The lubricant chamber at the bottom and the sealant injection device at the top ensure the supply of lubricant. In case the sealant is injected into the...

What is Plug Valve?

What is Plug Valve?

Plug valve is the valve that uses a tapered or cylindrical “plug” to stop or start the flow. The plug in the plug valve has a hollow passage to pass the fluid. When the valve is open, this bored passage is in line with the flow. When the plug is rotated a quarter turn to change from open to closed positions, the solid part of the plug stops the flow.   Plug valve is used in place...

Why Triple Offset Butterfly Valve Superior to the Standard One?

Why Triple Offset Butterfly Valve Superior to the Standard One?

Triple eccentric butterfly valves, also called triple offset butterfly valves, are critical in applications where bubble-tight shut off is required. In some applications, bubble-tight shut off cannot be achieved using double eccentric butterfly valves. Some applications don't lend themselves well to traditional butterfly valves, e.g., applications involving harsh chemicals or media containing...

How to Maintain Ball Valve?

How to Maintain Ball Valve?

1. Before you use the ball valve, spray water to clean the overflow part of the pipeline and valve body to allow residual iron filings and other foreign matters to enter the valve bore. 2. When the ball valve is closed, some media remain in the body and exert a certain pressure. Before you repair the ball valve, first close the stop valve in front of the ball valve, open the ball valve to...

A Brief Introduction of Marine Valves

A Brief Introduction of Marine Valves

When a ship is in operation, it needs to be dealt with many problems. It is necessary to solve those problems in order to make the ship run smoothly. Marine valve is a very important accessory of ships, which is mainly used to control the pressure, flow rate and flow direction of the liquid in the pipeline of the ship. If the liquid in the ship cannot be controlled, it will have a great impact on...

The Description of Globe Valves

The Description of Globe Valves

Valves such as globe valves, gate valves, butterfly valves, check valves and ball valves are indispensable in various piping systems. Each valve differs in appearance, structure and function. For example, the structure of the gate valve is more complicated than the globe valve. So when you want to buy a globe valve, its structure, classifications, features and other installation information are what...

Something You Should Know about Dual Plate Check Valves

Something You Should Know about Dual Plate Check Valves

The check valves refer to a kind of automatic valves which rely on the pressure of the flow medium in the pipe to push the disc, so as to close and open the valve. When the medium stops flowing, the check valve disc closes, preventing the medium in the pipe reversing, keeping the pump and drive motor from reversing, in case the medium leaks. Thus all play a key role in ensuring the safety of the pipeline....

Are You Looking for Wedge Gate Valves?

Are You Looking for Wedge Gate Valves?

As we all know, gate valves refer to a kind of valves in which the closure (wedge disc) moves in the vertical direction of the channel axis, and is mainly used as a cutting medium in the pipeline to fully open or close the device. In general, gate valves are not available for regulating flow, but can be applied under low temperature low pressure or high temperature high pressure. The gate valves can...

How to Choose China Valve Manufacturer?

How to Choose China Valve Manufacturer?

When it comes to valve manufacturing China is definitely a leader in this field. In the past 40 years, more than 30,000 valve manufacturers have sprung up on the land of China. The number of valve suppliers in China and their supply diversity have been significantly improved, which provides buyers with a wider choice. However, for those who want to buy valves from China, finding a qualified valve...

Baltic Ball Valves Seeing a Boom in Foreign Market

Baltic Ball Valves Seeing a Boom in Foreign Market

In the past 40 years of technological development, the ball valve has been continuously improved and updated in its production technology and product structure. It is a new type of valve that is gradually being widely used. In West countries with developed industries, the ball valves are increasingly used year by year. Ball valves play an extremely important role in oil and gas pipelines, devices...

Valve pressure test precautions

Valve pressure test precautions

The production of valves is a complicated and simple process. The production cycle of ordinary valves such as gate valves, ball valves, globe valves, butterfly valves and check valves is generally three days. The production of manufactured valves must pass various performance tests. The most important test is the pressure test. The pressure test is to test whether the pressure value that the valve...

How to Evaluate Valves

How to Evaluate Valves

Because systems rely on valves to control flow, valve selection is crucial. With dozens of types, materials, manufacturers and models to choose from, we should evaluate each valve on the basis of simplicity, efficiency and safety.   Simplicity Put simply, when a valve needs to open, it should easily open, or vice versa. While this single function may seem simple, it is not...

General requirements for pneumatic check valves

General requirements for pneumatic check valves

1. The specifications and categories of pneumatic valves produced should meet the requirements of the pipeline design documents. 2.  The model of the pneumatic valve should be indicated, according to the national standard number.  If it is an enterprise standard, the relevant description of the model should be indicated. 3. The working pressure of the pneumatic valve requires ≥ the working...

Types of Ball Valves

Types of Ball Valves

A ball valve is a device with a spherical closure unit that provides on/off control of flow. The sphere has a port through the center. When the valve is positioned such that the port is aligned in the same direction as the pipeline, it is in open position and fluid can flow through it. When rotated 90 degrees, the port becomes perpendicular to the flow path, meaning the valve is closed and the fluid...

A Brief Introduction of Butterfly Valve

A Brief Introduction of Butterfly Valve

A butterfly valve is regulating valve with simple structure that can be used for low pressure pipeline medium on-off control. A butterfly valve is a kind of valve whose closing part is a disc, which rotates around the valve shaft to open and close. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position. The...

The impact of rising raw material price on the valve industry

The impact of rising raw material price on the valve industry

In recent years, China valve industry has developed rapidly, and its product export and market share have been expanding. It has gradually become an important production base and main product sales market for the global valve industry. With numerous valve enterprises, small-scale, lack of core competitiveness, and low concentration of enterprises, it is difficult for China valve industry to exert...

Common malfunctions and their causes of general & automatic valves

Common malfunctions and their causes of general & automatic valves

Common malfunction and its causes of general valves  1. Causes & Maintenance Methods of Stuffing Box Leakage Causes of Stuffing Box Leakage Maintenance Methods Incorrect Packing (Such as spinning the tube) Pack correctly. Deformation, Corrosion or Rust of the Valve Stem Repair or change it for a new one. Aging of the Stuffing Change the stuffing. Inappropriate Operation or Pushing too...

An analysis of valve market in China (Part two)

An analysis of valve market in China (Part two)

Existed problems in Chinese valve industry: • An ever-changing market • Relatively low price per product • Increasing cost of labor and raw materials • Lack of people with competent ability • Financial difficulty for middle and small-sized enterprises • A higher threshold of export Shortcomings of Chinese manufacturers and enterprises that need...

An analysis of valve market in China (Part one)

An analysis of valve market in China (Part one)

As a fundamental product for environmental protection, valves are of a wide variety of kinds, and rapidly evolving with the development of equipment manufacturing industry. Under the premise of technical enhancement, valves made in China have gained popularity in the market and their industrialization trend, as well as high-end developing direction, have become more and more obvious. Many kinds of...