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Wenzhou Kolink Valve Co., Ltd.

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  • What Are Check Valves?
    All check valves functions as backflow control but it can't control back pressure. It is a kind of valve which only allows flow in single direction. However, it is not doable to release low pressure concentrate into a higher pressure line. Even though a this kind of valve is set up next to a steam trap, concentrate will not run if the force on the upstream of the trap is lesser than the down flow portion. It is important to observe that whenever a this kind of valve is set up at the opening of a trap working under a very large degree of difference pressure, the valve itself turn into a point of resistance; the valve may have a pressure drop too, this means that calculating pressure drop very cautiously is necessary. Primarily check valves are designed for protection purposes; to avoid backflow and to make sure that somebody working in the system is sensitive which way fluids and gases are running through. Most valves of this kind are set up in residential sewer lines to help hold back sewage passing back up the pipeline and to the resident's different water facilities. These kinds of valves has an axis wag that unfastens and let liquid waste materials pass through it, and shuts off if waste flows pressure back up the reverse way due to an obstruction far down the pipeline. These valves have a cover so the flap can be easily reach and check, and must be permanently fixed into the sewer line; though these valves necessitate minor concern over a longer period. At times leaks may occur that should be given attention immediately to avoid long further damages. Leakage may be due to the existence of small specks of strange substances trapped between the checking device and its holder. The only remedy to take out the strange substances is to remove the control device from its place and totally take apart the valve. If scratches are not found on the valve holder or the checking gadget, clean the parts by washing in a clean hydraulic fluid of the similar nature being used in the structure. Check valves are commonly used when numerous gases are blend into one gas stream; although these valves are set up on every individual gas streams to avoid integration of the gases in the original supply. A typical example is when oil and oxidizer are to be blended; check valves will usually be utilized on both the fuel and oxidizer supply outlet to make sure that the original gas tube keeps clean and consequently nonflammable. Check valves are also essential components in several natures of medical apparatus and gadgets, like the non-re-breather masks that are utilized to supply additional oxygen. Moreover, most plumbing structures at the most have one unit check valve, and complex planning of such control device are utilized protection and safety in chemical industrial plants, tankers, and in various types of facilities. Bear in mind, that it is more expensive to restore and repair damages and clean out the mess is much greater than the rate to set up a check valve. It is the home owner held liable and responsible for any damages in case a backwater valve has not been set up by home owner. Remember that "responsibility starts in the home."

    2015 10/22

  • An Introduction to Ball Valves
    Ball valves are used in almost every process in engineering where flow control is a requirement. Its invention and development has been on for decades and even as of today, the basic design and principle of this instrument of flow control has remained the same, with the exception of different variations of flow control. The Principle of Flow Control Operation This device consists of basically a spherical disk with a through hole which is installed within the casting of the device, which together makes up what we call the entire flow control system. The flow of fluid through pipelines can be controlled in terms of flow volume, or if necessarily, total cut-off, but adjusting the level or handle at the top of the device. The level or handle of the valve is connected to the spherical disk and by turning the level or handle, the opening of the spherical disk can be tilted to a specific angle which determines the rate of flow as well as the termination or cut-off of the flow. The simple design and its underlying principle has stood the test of time, and the efficiency and durability of the construction makes the control of fluid flow an efficient process. Industrial Applications Applications of the valve control system can be found in numerous industrial processes from oil refineries, petrochemical installations, pharmaceutical plants, breweries and so on. They can also be found within buildings for flow control of water in domestic residential applications. The versatility and durability of the this product is such that where fluid movement control is needed, the ball valve is practically indispensable. Types and Terminology They can be of many different types depending on the application and specification requirements. Actuated ball valves, trunnion ball valve, 3 way ball valve, check valves, globe valves, control valves and so one, are just some of the terminology used in its definition. A control valve, for instant, is basically a one that is coupled or installed with a pneumatic actuator to allow for remote control of flow processes in the pipelines. These flow control systems can also come in a variety of material types, like stainless steel for instance. Material grades determine the ability of the valve to within specific operating environments like high pressure, high or low temperature as well as conditions of operations where the ball valve will have to come into contact with corrosive medium. The selection of the ball valve for a specific application is an engineering decision based on knowledge of the science that pertains to particular industries.

    2015 10/22

  • Which one do you prefer, Ball Valve or Gate Valve?
    One of the most common problems we deal with on a regular basis is the replacement of old shutoff valves. When installing or replacing a shutoff valve, there is a choice to be made: ball valve or gate valve? Since water essentially wreaks havoc on on your entire plumbing system, having the proper valve in place will help delay problems down the road. The gate valve has been around for a long time, and is slowly becoming obsolete. The design of the ball valve makes it superior to the gate, and almost always lasts longer and causes fewer problems. A ball valve utilizes a sphere with a hole in it to control flow. When the handle is turned parallel with the valve, the hole is open to flow. When the handle is turned a 1/4 turn, the sphere is also turned and the hole is now perpendicular to the valve and flow is stopped. Ball valves can almost always be operated after years of disuse and do not typically get locked in position. A gate valve uses an internal gate that moves up and down on the stem. The stem is connected to the handle which screws the gate up or down, opening and closing the gate. The gate valve has a few disadvantages. The biggest problem is that over the course of time, the stem which controls the gate may, and usually will break. This means the gate is stuck in place and the water will either be stuck on or stuck off. Another problem is that gate valves are notorious for seizing shut after a long period of non-use. If they are able to be freed up, they will usually start to leak. One thing you should keep in mind though, there are some areas that actually still require the use of gate valves before and after the water meter. The reason being that a ball valve is able to be shut off very fast with just a quarter turn, whereas a gate valve is not. In the extremely unlikely event that all the water is running in a house, and the ball valve is shut off quickly, it will cause a water hammer condition, and may cause a problem elsewhere. This is very unlikely and should not be a factor unless required by your local authority. Another thing to keep in mind is that like all things, there are different grades of each type of valve. Unfortunately, the box stores typically only sell on price, and not quality. We have seen a great deal of defects and leaks with "economy" grade valves. A reputable China kolink Valve co,ltd will always supply you with a better valve, and will also be able to install the best valve for you upon request. It is advised that if you are in an area requiring a gate valve, a good quality gate valve is a very worthwhile investment.

    2015 10/22

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