06 Dec

What Is A Plug Valve And When Is It Used?

what-is-a-plug-valve-and-when-is-it-used

We’ve previously discussed how to select specific valves for improving production time and MTBF and thought it would be a good time to review one of the most simple and economical valves available: the plug valve.

Plug Valve Basics

 A plug valve is shaped like a cylinder or cone and can be rotated inside the valve body to control flow of fluids. Plug valves have one or more hollow passageways often placed horizontally to allow ease of flow through the valve when open. The most common type of plug valve is the 2 port model with an open and closed position. The two ports are usually located on opposite sides of the valve with one passageway leading from inbound to outbound and the stem and handle located on the top. A plug valve also uses a quarter turn valve, which is useful where quick and frequent operation is essential. The valve ends can be flanged, hub type, or butt weld.

Plug Valve Types and Their Uses

 Although there are many types of plug valves, there are four general categories, each with their own benefits.

1. Lubricated Plug Valve

 As the name suggests, a lubricated valve uses a lubricant usually made up of a base oil and viscosity improver (like amorphous or fumed silica) that is injected under pressure between the plug face and body seat to reduce friction and seal ports. Valve manufacturers generally recommend lubricant suitable for the process fluid, and the valves often must be resealed after only a few cycles, and in some cases, after every cycle. Considered a high maintenance plug valve, they are often used in applications that have infrequent operations. Lubricated plug valves perform well in processes that utilize fluids which carry mildly abrasive particles such as dirty upstream applications, gas pipeline systems that need bypass valves, and as blow-down valves on valve stations and kicker valves.

2. Non-Lubricated Plug Valve

This plug valve utilizes a tapered or cone-shape that acts as a wedge and presses a polymeric sleeve against the body cavity. The use of the sleeve reduces friction between the plug mechanism and body.  Non-lubricated plug valves are often used instead of lubricated ones in applications where maintenance needs to be kept to a minimum, such special services in sulphur, hydrogen fluoride, or where liquids could be trapped or solidify and potentially jam the valve. However, non-lubricated plug valves are limited by temperature and chemical compatibility of the non-metallic materials they are made of.

The three main types of non-lubricated plug valves are:

Lift-type plug valve

Elastomer sleeved plug valve

Fully lined plug valve

3. Eccentric Plug Valve

The design of this plug valve uses a half plug that is advantageous for applications needing a higher seating force with minimal friction from open to closed position. The torque seated valves also feature improved shut off capabilities. Eccentric plug valves are used for a wide range of flow control and isolation applications including clean and dirty water, sewage, sludge and slurries, air, and other services.

4. Expanding Plug Valve

 This complex plug valve uses multiple components that allow the valve to mechanically expand and give it a true double block and bleed function in one valve. The plug valve uses a mechanism that rotates between the open and closed position and protects both seals from the flow path. During rotation there is no contact between body and seals, and slips expand onto the body seat when the valve is closed to avoid causing any wear or abrasion to the seals. They are often used to prevent product contamination in applications that do not require a double isolation.

In conclusion, plug valves have a number of useful applications, and new technology and designs are sure to give them an even wider variety of applications within many processes. And if you need more information on different types of valves, check out this piece on check valves or the rest of the site.

 

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02 Dec

DIFFERENT TYPES OF PIPE FITTINGS IN PLUMBING SYSTEM

Various types of pipe fittings are available in plumbing systems for different purposes and functions. A pipe fitting is used in plumbing system to join multiple pipes of same size or different sizes, to regulate the flow or to measure the flow. They are made up of different materials like copper, iron, brass, PVC etc.

 

Types of Pipe Fittings in Plumbing System

Different pipe fittings and their functions are explained below.

  • Elbow
  • Reducer
  • Tee type
  • Cross type
  • Coupling
  • Unions
  • Adaptors
  • Olet
  • Plug
  • Cap
  • Valve

 

Elbow Pipe Fittings

Elbows are used to change the direction of flow between two pipes. Elbows are generally available with an angle of 22.5o, 45o and 90o. If pipes are of same diameter then normal elbows are used otherwise Reducer elbows are used. Elbows are made of different materials. These are generally coming with female threads and we can fix them by butt or socket welding also.

elbow-pipe-fittings

 

Reducer Pipe Fittings

Reducer is a pipe fitting component which reduces the flow size from larger to smaller by reducing size of pipe. Usually there are two types of reducers are available. One is concentric reducer which is like cone shaped with gradual decreasing around the pipe but in this case accumulation of air may possible and it results in cavitation. Other one is eccentric reducer which is having one edge parallel to connecting pipe due to which air accumulation is not possible.

reducer-pipe-fittings

 

Tee type Pipe Fitting

Tee type fitting is a component of plumbing system which is in T-shape. It is having one inlet and two outlets, outlets are arranged at 90o to the main line connection (inlet). It can also be used to combine the flow from two inlets to one outlet. They are also available in different materials and different sizes. If the 3 sides of T-fitting are similar in size then it is called as Equal tee otherwise it is called as Unequal tee.

tee-type-pipe-fitting

 

Cross type

Cross type fittings contains 4 opening in 4 directions. These are connected when there are 4 pipes are meeting at a point. These fittings generate more amount of stress on pipe as the temperature changes, because they are located at the center of four connection points. Cross fittings are generally used for fire sprinkler systems.

cross-type

Coupling

A coupling is used to connect the pipes of same diameter. Coupling are also useful if the pipe is broken or leakage occurs. Generally there are two types of couplings are available. Compression coupling and slip coupling. Compression coupling is regular coupling which is connected between two pipes and it prevents leakage by the arrangement of gaskets or rubber seals on both sides, otherwise glue is provided. Slip coupling is easier to install and it contains two pipes which are arranged as one into other, inner pipe can slide up to some length. So, we can fix long length damaged pipe by slip coupling.

coupling-pipe-fitting

 

Unions

Union is a type of fitting, which functions as similar to coupling. But coupling cannot be removed after fixing but in this case we can remove the union whenever we needed. Unions consists nut, male and female ended threads. So, this is also useful for maintaining purpose of pipe.

unions

 

Adaptors

If the pipes are not having special ends or plain ends then adaptors make them threaded either male or female whichever is needed. Adopters are generally used for copper and PVC pipes. Male adapters contain male threads and female adapters contains female threads. One end of adapter is plain which is glued or welded or soldered to the plain pipe end.

adaptors-pipe-fittings

 

Olet

Olets are used when there is standard sizes of fittings are not suitable for our requirement. Sometimes the inlet pipe size is larger compared to outlet pipes in t-sections then also Olets are used. There are many types of olets are available. Some important types of olets are:

  • Butt-Weld Olet
  • Socket weld Olet
  • Threaded olet
  • Elbow olet
  • Nipple olet
  • Lateral olet
  • Sweep olet
  • Flanged olet

Olet Pipe Fittings

 

Plug

Plug is a component of plumbing component which is generally used to close pipe opening during inspections and repairs. Plug are generally contains male threads.

Plug for Pipes

 

Cap

Cap is a type of pipe fitting which function is same as plug but the only difference is plug contain male threads and cap contain female threads which is screws on the male thread of pipe. These are available in different materials like rubber, copper, steel, plastic etc.

Pipe Cap

 

Valves in Pipe Fittings

Valves are components of plumbing system which are used to stop or regulate flow of fluid in its path. Different types of valves are available depending up on their applications.

Valves in Pipe Fittings

Some important types of valves and its applications are listed below.

  • Gate valve, plug valve and Ball valve – used for isolation only
  • Globe valve – used for throttling
  • Check valve – used for preventing reverse flow (non-return)
  • Butterfly valve – used for isolation as well as throttling
  • Diaphragm valve – used for isolation as well as throttling

 

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29 Nov

Installation Guidelines for a Check Valve

installation-guidelines-for-a-check-valve   Check valves are simple devices that allow fluid media (gas, liquid or solids such as sand or slurry) to flow only one way. Typical check valve installations are found in industrial plants, automobiles, plumbing and ventilation systems. Usually, check valve are relatively inexpensive, compared to more accurate control valves. For a given application, the valve body must be able to contain the media and pressure, and the gate action must have a durable service life. Installing check valves is a matter of determining the correct flow direction for the media and ensuring proper fittings for the inlet and outlet port.

Materials
Installing the correct check valve for a particular process means knowing the media the valve will control. Caustic or abrasive media (lime slurries, acids, cement mixes, etc.) require a check valve resistant to severe corrosion; stainless steel or ceramic check valves work well for such applications. A check valve installed to control hot water flow in a plumbing installation can be made from PVC plastic, brass or steel. As long as the valve can handle the heat and pressure of a standard water line, it will work well.

Installation
Installing a check valve is similar in procedure to installing any other valve with one important distinction: direction. The valve must be installed in the media’s flow direction–nothing can move against a closed check valve gate. Check valve manufacturers include on the valve body an arrow indicating proper flow direction.

Incoming and outgoing lines can be connected using clamps, swage fittings (fittings using a collar around the line, with the fitting and the valve stem hydraulically compressed together) or threaded fittings.

Access
Check valves work automatically to eliminate back flow in a process line. There’s no need for manual operation–the valve can be installed in relatively inaccessible locations. Although other valve installations may require clearance for actuators, access to a manual valve shut off or other features, check valves require little maintenance.

If installed as a diversion valve to relieve excess pressure or heat, the check valve gate can be adjusted to respond to specific pressure settings. For example, a check valve can prevent a steam boiler from building up too much pressure or a car’s radiator from rupturing when the coolant fails: the check valve will divert the high pressure media away from the process and avoid catastrophic failure. When pressure and heat amounts remain within operating limits, the check valve will stay closed.

 

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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.

 

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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

03 Nov

What is a Plug Valve?

what-is-a-plug-valve

A plug valve is a simple type of valve that allows or blocks the flow of a liquid through a pipe. The plug itself is often shaped like an upside-down ice cream cone or a cylinder. A handle on top allows the user to turn the plug valve so it rotates and stops or starts the flow of liquid. A minimum of two holes, known as ports, must exist in the plug for liquid to flow. The ports are located on opposite sides of the plug, and when the plug is turned to the open position it creates a passage for the liquid to flow through.

This arrangement of two ports is known as a 2-port valve. The pipe in which the plug valve is installed has an area for liquid to flow in and another for liquid to flow out. When the 2-port plug valve is turned on, the ports line up with the holes in the pipe and the liquid flows straight through as if the plug valve was not there. Other, more complex plug valves known as 3-way valves allow liquid to flow to a combination of different ports. One port may connect to either of the opposite two ports, or all three may connect at once.

Two major categories of vales exist: stop valves and check valves. Stop valves follow a basic design structure to turn the flow of liquid on and off, or allow partial flow. Check valves, in contrast, allow liquid to travel only one way and often do not have a handle. Plug valves fall into the stop valve category.

Other stop valve types include gate valves and ball valves. Though similar to plug valves, the shape of the parts and how they work to stop the flow of liquid typically determines the specific group they belong to. Regardless of group, stop valves typically control liquid through the use of a handle.

Operation of a plug valve is simple, making it a common valve choice. The user twists the handle and the ports are moved away from the opening in the pipe. In certain valves, a full turn is not required. Quarter-turn valves, for example, only require the user to make a short, quarter turn to stop the flow of liquid. Often, plug valves can lessen the flow without turning off completely if the user turns the valve half-closed but leaves it open wide enough for some liquid to make it through the ports.

Souced 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

17 Oct

Instrumentation Valves And Fittings Market to Reach $5.63 billion with 5.5% CAGR

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  According to researcher, the Global Instrumentation Valves and Fittings market is expected to grow from $3.86
billion in 2015 to reach $5.63 billion by 2022 with a CAGR of 5.5%. Huge requirement for valves and fittings in in
dustrial automation in fumes, fluid, and gas control applications is the major factor driving the market growth. In
addition, growth in usage of instrumentation valves on account of increasing growth rate of hyperbaric oxygen
therapy devices is also favouring the market growth.

Ultraclean valves market is anticipated to grow at a higher CAGR during the forecast period. It is attributed to exte
nsive usage in pharmaceutical sector for ultra-hygienic applications. The oil & gas application is leading the glob
al market. It is led by increasing market demand for valves in the instrumentation valves & fittings market. North
America and Europe are projected to be the leading markets in terms of market size, during the forecast period. A
sia Pacific and Latin America are expected to witness high growth rate during the forecast period.
Some of the key players in global instrumentation valves and fittings market include Fujikin., Dwyer Instruments,
Fitok, Bray International Inc., Braeco., Hoke., Hex Valve, Ham-Let, Astectubelok, As-Schneider, Hy-Lok, Ssp Fitt
ing, Oliver Valves, Safelok, Swagelok, and Parker Hannifin.

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10 Oct

Stainless steel tube fitting manufacturer improves productivity with new all-electric tube benders

vr-fittings

Wellington, New Zealand, March 23, 2016 — Two new all-electric tube bending machines are helping Ultibend Industries to boost the manufacturing productivity of stainless steel tube fittings for food and beverage processing systems. Customised to suit Ultibend’s proprietary manufacturing process, the machines from Unison automate the bending of tube fitting shapes such as elbows and U-bends, in sizes from 1/2 to 4 inches diameter. Initial manufacturing operations have demonstrated that the new machinery boosts manufacturing speed compared with the previous hydraulic bending process.

Ultibend started in 1992 as a subcontract tube bender, supplying architectural pipework. The company also found a market for tubular parts for the strong local food processing industry, and evolved from sub-contract work into offering a broad range of stainless steel tube fitting parts for applications including food, winery, brewery, dairy and sanitary processing.

As part of the company’s development, Ultibend designed and manufactured its own tube bending machines. There are now four of these machines and they have served Ultibend well, but they are hydraulically powered – and critically for the future development of the company – only offer a very basic level of machine and operator control. As the company has expanded, it became interested in upgrading the bending process with more flexible all-electric machines – using software-controlled servomotor controlled bending. Developing its own solution to this upgrade would involve familiarity with servomotor based motion control as well as much more sophisticated machine control and interfacing software – and it was viewed as too big a step for the Ultibend engineering team. So, it decided to look to the commercial market for an upgrade.

Ultibend settled on Unison as the supplier, largely because of the fact that it had started life as a machine controls and software supplier and that a large proportion of its output was customised.

“We didn’t want a standard machine, so discovering Unison was great. Their willingness to customise – and the fact that they are genuine machine control experts – gave us confidence that we would get the far-reaching solution that we were searching for,” says Ultibend’s co-founder and director, Linc Turley. “The investment means that our business now has the manufacturing platform to support substantial growth, including our current expansion into the USA and other new export markets.”

One of Ultibend’s unique advantages is the very high functional quality of its tube fittings. Bends are highly uniform, with the kind of ovality tolerances that would normally only be found in an aerospace workshop. This quality level is achieved by Ultibend’s proprietary manufacturing process, which means that bent parts are exceptionally uniform as they come off the machine. Ultibend also developed its own clamping system, which allows short elbow and U-shape parts to be gripped and bent at the expense of trimming only a miniscule amount of scrap material. Both of these techniques have been incorporated in Unison’s new customised machine design.

“Unison’s customisation capability means that we’ve been able to emulate unique features Ultibend uses in its process, and then exploit the all-electric machine architecture to enhance productivity,” says Jim Saynor, Unison’s Senior Commercial Manager. “The result is that the two new machines have increased output- while also providing much richer programming, networking and operator control facilities to open up further opportunities for progress.”

The main reason the Unison machines speed the bending is the inherently greater control of motion that’s possible inside Unison’s software-controlled, all-electric machine architecture. The software gearbox is able to control and coordinate several axes simultaneously for instance, avoiding the delays of a more mechanical machine such as the latency in response of a slave axis.

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