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Characteristics and Test Methods of Y-Strainer

Y-strainer (water strainer) belongs to the series of pipeline strainers, and can also be used for filtering gas or other large particles. When installed on the pipeline, it can remove large solid impurities in the fluid, so that machine equipment (including compressors, pumps, etc.) and instruments...

An introduction to Y-type and T-type Strainers

Y-type strainers are mainly used in liquid applications to protect downstream equipment from particles (e.g. dust) that might affect performance if not treated. The bulk of Y-type industrial strainers can also be effectively used for steam applications and for those handling inert gases or air. Although...

Why Butterfly Valves can be Used as Fluid Flow Control Valves

One of the reason why butterfly valves are well suited as fluid flow control valves is that they are smaller and lighter than their substitutes. If their size is correct, butterfly valves can provide a wider control range than similar valves, e.g. globe valves or ball valves, and take up less space....

The Sealing Principle of Triple Offset Butterfly Valve

The triple eccentric butterfly valve, also called triple offset butterfly valve, has a sealing system similar to the stop valve. The system consists of a fixed valve seat and a rotatable sealing surface, both of which have the same conic section. The triple offset butterfly valve is closed through...

Advantages of Sleeved Plug Valve

Sleeved plug valves have the advantages of bidirectional flow, simple operation, light weight, compact design and multichannel design. Teflon sleeve can completely cover the cock. The sleeve provides a large area of surrounding sealing surface to ensure good sealing when the cock is opened, closed...

Brief Introduction to Trunnion Mounted Ball Valve

Trunnion mounted ball valve, a new generation of high-performance ball valve, is suitable for long-distance pipelines and general industrial pipelines. Its strength, safety and resistance to harsh environment have been specially considered in the design, and it is used for various corrosive and non-corrosive...

The Difference Between Soft Seal and Hard Seal Gate Valves

Soft seal gate valves and hard seal gate valves are two major categories in the gate valve series. With the continuous development of China's industrial market, it is necessary to understand the difference between those two categories. Use one of the two valves at will may not only affect production...

An Introduction to Check Valve

1. What is check valve? The check valve is an automatically activated safety valve, allowing only one-way flow of gas and liquid. The purpose of the check valve is to prevent the process flow from reversing in the system. Process flow reversal may damage the equipment or disturb the process. They are...

Applications of the globe valve (Part two)

Globe valves used for high temperature and high voltage power stations The valve body and the valve bonnet of globe valves used for high temperature and high voltage power stations adopt self sealed pressure or clamp connections. The connection between the valve body and the pipeline is butt welding...

Applications of the globe valve (Part one)

Globe valves with small diameters are usually connected by external threads or cutting sleeves. Globe valves with large diameters can also adopt flanged connections. Most of the globe valves are driven by handwheels or handles. A few high-pressure globe valves with large diameters or occasions which...

The Origin and Development of the Valve (Part Three)

Sealing and strength performance are basic and the most important performance for valves. Sealing of valves can be divided into internal sealing and external sealing. Internal sealing is the sealing between the valve clack and the valve seat; external sealing is the sealing between the moving part of...

The Origin and Development of the Valve (Part Two) 

Valves can be classified into block valves, regulating valves, check valves, diverter valves, safety valves and multi-purpose valves six categories based on their functions. Block valves are mainly used for cutting off fluid passages, and check valves, gate valves, plug valves, ball valves, butterfly...

The Origin and Development of the Valve (Part One)

A valve is a device which controls the fluid's flow, pressure and direction, which is a control component in the piping system. The controlled fluid may be a liquid, a gas, a gas-liquid mixture or a solid-liquid mixture. The control function of the valve is fulfilled by relying on the driving mechanism...

Manufacturing of Valves (Part Three)

C. The internal parts with no need for overlaying sealing surfaces The manufacturing process of the internal parts with no need for overlaying sealing surfaces consists of the following steps: procurement of raw materials (according to the standard), the factory inspection (according to the standard,...

Manufacturing of Valves (Part Two)

4. The Process Planning of Valve Parts A valve only has a few of major parts. The simple structure, the inaccurate machining and the rough external surface of the major parts leave people an impression that the major parts are just the simple components. Actually, the precision of the core sealing parts...

Manufacturing of Valves (Part One)

How to make valves? How much do you know about it? The Manufacturing Technology Features of Valves When first seeing valves, you will find that valves have a few components, simple structures and general precision. Valves belong to simple parts in the mechanical industry, however, the central seal parts...

China (Yiwu) International Pump and Valve Fire Fighting Equipment Fair 2017

Exhibition Address: Yiwu International Expo Center. Sponsor: Yiwu Pengxiang Exhibition Co., Ltd. Co-organizer: Zhejiang Pump & Valve Industry Association and Yiwu Zhongbo Exhibition Service Co., Ltd. Contractor: Yiwu Pengxiang Exhibition Co., Ltd. China (Yiwu) International Pump and Valve Fire Fighting...

An Introduction of Wafer Butterfly Check Valve

A wafer butterfly check valve has the valve clack opened and closed automatically by the fluid of media for preventing backflow of media, which is also known as a backflow valve, non-return valve, reflux valve and pressure relief valve. With simple structures, this kind of valve can only be mounted...

Improvement of Ball Valves Sealing Performance

Present Situation and Analysis of Ball Valve Sealing Cast stone ball valve is an ideal disc for ash pipeline and its back seal will directly affect the quality and service life of itself. In the past, it adopted an O-shaped rubber seal structure in which an O-shaped sealing ring was placed in an annular...

Applicable Scopes and Principles of Ball Valves

1. Applicable Fields of Ball Valves Ball valve seat gaskets are made of rubber, nylon and polytetrafluoroethylene(PTFE), so their operating temperature is limited by the valve seat sealing material. The stop function of the ball valve is realized by the mutual compaction of the metal...