19 Dec

Needle Valves- How Are They Different From Flow Control

needle-valves-how-are-they-different-from-flow-control

Needle valves are fittings which are designed with a slender and tapered point at the end of its valve stem. This is the valve’s stem which is actually lowered right through the seat, to block or restrict the flow.

Needle valves are used to ensure that the fluid passes through the valve, and actually turns 90 degrees before it passes through an orifice which serves as the seat. This seat comes with a rod having a cone shaped tip. The valves are actually used to regulate the actual flow of liquids as well as gases, at rates which are set at a low flow.

The fine threading design of the needle valve stem, along with its large seat area, ensures that precise resistance will follow. These valves are used to control and check the flow of liquid and gases into the delicate gauges of the system, which are at a high risk of suffering damage if subjected to extreme pressure.

These valves are also utilized in industrial equipment, where the flow needs to be brought to a final halt. They are also utilized where a precise adjustment of the flow is considered essential, or wherever a small and controlled flow is needed. These valves can easily be used as both on and off valves, along with the use in a system for throttling service.

Difference Between A Flow Control And Needle Valve

Both of these fittings are used to control and reduce the flow of air in the leg of a pneumatic circuit. This results in slowing down the actuator speed. While the basic function of both the fittings is flow restriction, the main difference is that the needle valve controls the flow of liquid or gas in both directions, while the flow control valve only ensures control in one direction only.

The needle valve is bi directional, while the flow control is one directional only. In both the fittings, there is a finely threaded stem, which allows the gradual adjustment of the quantity of controlled flow, which passes through the valve. This controlled flow enters the input port and travels through the orifice, which is actually sized by the tapered stem, and out through the output port.

The flow control fitting actually features a simple by pass feature, which is then allowed to ensure a rapid and free flow, out from the output port of the fitting, by means of the input port.

Two types of flow control fittings are used for the purpose of selection and placement, within a carefully designed electric circuit and which in turn greatly affects the overall functions of an actuator.

A meter out valve is a very common type of flow control fitting, which is used to control the actual exhaust flow being emitted by an actuator. While a meter in flow is a fitting which is used to restrict the overall flow of actuator. It is also termed as reverse flow control.

Sourced by ekomeri.com

16 Nov

Things You Must Know Before Purchasing Precision Pipe Fitting Tubes

things-you-must-know-before-purchasing-precision-pipe-fitting-tubes

Precision pipe fittings, tubes, and adapters come in the vast range of products such as Hex Nipples, hex reducing nipple, adapter gasket, hex coupling, and much more. These are important partsof the industrial components, especially in the gas, power, fertilizer, and other industries.

It’s important for you to know the standard required before making the selection. These products should be made of very high quality raw materials to ensure the international quality.

Design features

These are the following design specifications to consider:

  • Fittings are properly packaged with exposed threads protected to ensure they are not damaged during delivery.
  • Working pressures calculated in accordance with Power Piping Code, Process Piping Code & Pressure Vessel Code.
  • Full form threads are machined to ensure leak-free & reliable systems.
  • Large choice of connections and configurations should be available.

How to select the right parameters

You need to ask right questions:

    • Can it bear the pressure?
    • Can it withstand the high temperature?
    • Are the joints and seals reliable?
    • Are the manufacturers reliable?

Choosing the right pipe fittings and adapters should be done with a lot of caution. Industrial applications are sensitive and compromise with the quality may result to untoward accident. Only those products should be selected that follow the Pressure Equipment Directive ofinternational standards

These are international standards for the design and fabrication of pressure equipment for piping, safety valves and other components and assemblies subject to pressure loading. Good companies such as Seal Excel follow such international standards.

Apart from that quality companies follows other international standards which ensure the safety of the equipment working in the potentially explosive material.

Certification ensures that the equipment or protective system is fit for its intended purpose and that adequate information is supplied with it to ensure that it can be used safely. There are four ATEX classifications to ensure that a specific piece of equipment or protective system is appropriate and can be safely used in a particular application.

Seal Excel instrumentation precision pipe and Tube fittings are completely heat code traceable. The company has a high standard of manufacturing process which completely follows the chemical and physical makeup. Our Instrumentation Pipe Fittings are manufactured under the international standard specifications and we strive hard to thoroughly clean the contamination during the process.

Summing up

Pipe Fitting Tubes are an important part of the industrial application and you need to be very careful while making the choice. Apart from the quality of the product, you also need to consider the brand and pricing before making the final decision.

 

Sourced by ekomeri.com

10 Nov

Tips for Choosing the Correct Pneumatic Fittings

tips-for-choosing-the-correct-pneumatic-fittings

 

 

Typically, you will find a range of varying pneumatic fittings easily in the market. However, the problem is that choosing an appropriate one is not simple. To take the right decision, you must be aware of the tubing to be utilized, the functional pressure of air, type of thread required for the receiving fitting, and lastly, the extent of vibration tolerable by the fitting.

 

Commonly Used Fittings

Outlined below are some of the common kinds of pneumatic fittings to help you choose the right one:

 

Quick Connect Couplings

Quick Connect Couplings are indispensable when it comes to connections that direct the flow of gas, water or air. Alternatively known as quick disconnect or quick release couplings, they offer a swift connection for transferring fluids. Usually operated manually, they serve as a great substitute for threaded and flanged connections.

 

Check Valves

In the simplest sense, check valves permit the flow in a single direction; hence, preventing reverse flow. Being a self-automated valve, they consistently work even if the manufacturing facility falls short of air, electricity or manual assistance. Not just manufacturing plants, check valves are found everywhere – even homes. In case you have a sump pump, it must have a check valve fitted over the discharge line. Check valves are utilized in every industry that makes use of pumps.

 

Hi-Duty Flareless Fittings

These fittings fall into the sub-category of compression fittings. However, they are particularly made applications that involve high pressure; usually more than 1000 PSI.

 

Push-Connect Fittings

Push-Connect Fittings use a similar mechanism as compression fittings. However, instead of using a metal-ferrule, these fittings utilize an O-ring (made using vulcanized rubber) that possesses the ability to get its actual shape let loose.

Consequently, this feature permits the fitting to get easily undone—just the way it was manufactured. Push-connect fittings have applications that involve lesser pressure. These fittings are extremely simple to connect, disconnect and then reconnect, ideal for applications that involve frequent alterations. Moreover, they can be utilized with brass, steel, copper, nylon, etc.

In addition to the above stated pneumatic fittings, there are a range of varying options, depending on the application. The more different the job requirements are, the more atypical the fittings will be.

Generally, compression fittings, push-connect fittings, specialty compression fittings can be easily bought and utilized for a broad array of applications. Find a comprehensive range of pneumatic fittings at SEALEXCEL.

Recognized as one of the finest pneumatic fittings manufacturers and suppliers, we additionally manufacture stainless steel push-in fittings, push-on fittings, monoflange valves, and more.

 

Sourced by ekomeri.com

27 Oct

How Does a Water Check Valve Work?

  how-does-a-water-check-valve-work

    Check Valves

  • Check valves are devices that are installed in pipelines in order to stop the backflow of material. In many cases, the material flowing through the pipe is water, and the check valve keeps the water from flowing backwards in the pipe. They do not require any outside activation, but are rather designed with mechanisms that block the water from reversing direction at a certain point.

     Uses

  • Water check valves are used in several different devices, and they are advantageous for several reasons. For example, they stop flooding or overflowing in sump pumps and water heaters. They protect equipment in control valves, strainers and flowmeters. They also save power, because the backwards-flowing water would use up electricity even when the device was off.

     Types

  • There are several types of check valves that are installed in water-using devices, but they are all based on the same underlying principle. A ball check valve consists of a ball held in place by a spring. When the water flows forward, the spring contracts and the ball is pushed away from the opening of the valve. Therefore, the water can flow through the valve. When the water stops flowing, the spring pushes the ball back into the opening in the valve and stops the water from flowing backwards.Swing valves work in a similar way. Instead of a ball, swing valves contain a small door on hinges. When the water flows by the door, the door swings back on its hinges and allows the water through. When the water stops flowing, the door slams shut and stops any backflow from forming.Similarly, a split-disk check valve contains a metal plate that folds in half as the water flows past it. When the water stops flowing, the plate springs open and blocks the entrance of the valve.

 

 

Souced by ekomeri.com

08 Jan

Join the Switch to DK-Lok

dk-lok valve

By utilizing DK-Lok fittings and valves, we are saving our customers millions of dollars every year.  Companies such as Exterran, Chesapeake, Shell, GE, ExxonMobil, BP, and many others use our products as a replacement for Swagelok.  As one Fortune 500 engineering evaluation put it, …“DK-Lok has the look and feel of Swagelok fittings.  All dimensions are virtually identical, and DK-Lok products are a Form, Fit, Finish, and Function direct replacement for Swagelok.”

Join the switch to DK-Lok.  For more information, and to learn how we can save your company 20% or more on your instrumentation valve and fitting purchases, Call (82) 55-338-0114 or email us

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