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Types Of Valves And Uses Pdf

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This article is all about valves, and the various types of valves and fittings available.

Industrial valves have been around for more than a century. As applications become more specific and complicated, valves have evolved into nine major types to suit different requirements. These 9 types cover all industrial applications and services. Valve categorization depends on several considerations. For this article, valves are categorized according to the functions.

Different Types of Valves used in Piping – A Complete Guide of Pipe Valves

This article is all about valves, and the various types of valves and fittings available. Valves are mechanical or electro-mechanical devices that are used to control the movement of liquids, gases, powders, etc.

In most instances, valves rely on some form of mechanical barrier—a plate, a ball, a diaphragm, for example—that can be inserted and removed from the flow stream of the material passing by.

Some valves are designed as on-off varieties, while others allow very fine control of the passage of media. Material selection plays an important role in specifying valves to ensure the compatibility of the wetted parts of the valve with the fluid or powder passing through it.

Sizing is determined by the pipe or tubing diameter, flow rate, and the width between flanges for pipeline valves being installed as replacements. Aerosol Valves are used for dispensing the contents of aerosol cans. They consist of two primary components, the housing and the stem. Key specifications include the intended application, actuator type, output type, valve size, and materials of construction.

Media dispensed can be a consideration as well. Air Logic Valves are mechanical or electro-mechanical devices used to regulate the flow of air in pneumatic systems and can be used in place of electrical control in instances such as hazardous atmospheres or where electrical control is impractical. Key specifications include actuator type, number of ports, materials of construction, switching speed, port thread size, pressure ratings, and input voltage. Air logic valves are applied to pneumatic systems as e-stops, pilot valves, one-shot valves, etc.

Balancing Valves are used to control fluid flow by dividing flow evenly in multiple flow branches. Key specifications include the number of ports, port connections, valve size, and materials of construction. They can also be used to provide a counterbalancing force for double acting cylinders. Ball Valves are quarter-turn valves incorporating ported spheres that swivel in the pipe stream to either block, or allow, flow.

Special designs are available which enable a degree of flow regulation. Key specifications include the number of ports, port configuration, port connections, valve size, and the materials that make up the valve body, its seat, seal, and stem packing. Ball valves can provide low head-loss characteristics as the port can exactly match the pipe diameter. Ball valves also tend to seal better than butterfly valves, but they can be costlier to purchase and maintain.

Typically they are actuated with a lever which provides a visual indication of the valve status. Blind Valves, or line blind valves, are mechanical devices used to stop flow through a pipeline. They are used primarily by the oil and gas industries as a means of isolating sections of a pipeline. Thes valves are also known as Piping Blinds. Key specifications include valve type, actuator type, port connections, valve size, as well as the material of the valve body, its seat, seal, and lining.

Blind valves are common on ships and offshore platforms. They provide a visible, immediate indication as to whether a pipe is open or closed and are used to isolate portions of a pipeline to allow maintenance. Butterfly Valves are quarter-turn valves which employ center-mounted circular flaps that swing into, and out of, the flow stream.

Key specifications include port connection, valve size, and the materials that make up the valve body, its seat, seal, disc, and stem packing. Butterfly valves are used in wastewater plants, power plants, and process plants for shut-off and for regulating and isolating service and are especially popular in very large diameter pipelines.

Generally smaller and cheaper than a ball valve of the same capacity, butterfly valves can be difficult to operate against high pressure and flow. Cartridge Valves are used to control flow in hydraulic and pneumatic fluid power systems. Their cartridge design allows them to be plugged into common manifolds and thus save weight and cost over discrete valve mounting.

Key specifications include the intended application, valve type, actuator type, number of ports, valve size, and the materials of the valve body, its seat, seal, lining, and stem packing.

Cartridge valves can be used in any of the common fluid power applications for which ordinary hydraulic or pneumatic valves serve, including check, directional control, flow control, logic, pressure control, motor control, etc.

Casing Valves are used exclusively by the oil and gas industry to provide access to well casings. Key specifications include the intended application, actuator type, port connections, valve size, and materials of construction. Check Valves permit fluid to flow through them in one direction only.

Lift-type check valves are similarly constructed as globe valves and use a ball or piston, often backed by a spring that opens under a specified pressure but closes as the pressure decreases, thus preventing backflow. These devices can be effective in low-pressure applications. A tilting disc check valve varies the theme somewhat by hinging the gate slightly inward to reduce the pressure required for opening.

Check valves are used on gas lines, for air service, and with pumps—anywhere that fluid needs to move in a single direction. They can be miniaturized , manufactured in plastic, and may incorporate many special features such as metal seats. Christmas Tree Valves are mechanical devices used for controlling the flow of media coming from wells or other systems. Key specifications include the intended application, number of ports, as well as the pressure and temperature ratings.

They are usually custom fabricated. Cock Valves are used for draining tanks and the like and often incorporate a threaded means for opening and closing. They are also used as low-pressure shut-offs where they typically use a quarter-turn lever. Key specifications include valve type, port connections, valve size, and materials of construction.

Cock valves are used in a range of product applications, including radiators, heaters, tanks, boilers, laboratory glassware, air systems, tanks, drums, etc. Diaphragm Valves employ flexible membranes to close off flow in pipes. Like pinch valves, the diaphragm completely seals off the actuating means from the process fluid, a benefit for valves in sanitary service. Key specifications include port configuration, port connections, valve size, media, and seal material.

Disc Valves are mechanical devices used to control flow through a pipe. A disc valve consists of a round flat plate mounted to the end of a stem that enters the pipe at 45 degrees to the pipe longitudinal axis. Rotating the stem through a half circle opens or closes the pipe. Disc valves are almost exclusively found in food processing applications. Key specifications include valve type, actuator type, port connections, valve size, and the materials of construction.

Disc valves are used in food, pharmaceutical, and dairy industries to for shut-off service of liquid, powder, or food slurries where sanitation is critical. Double Block and Bleed Valves are mechanical or electro-mechanical devices consisting of dual inline blocker valves and single bleeder valves in common valve bodies and used for isolating fluid lines from upstream pressure.

Key specifications include the intended application, actuator type, port connection type, flow coefficient, media, pressure rating, as well as the features. They may be manually operated or controlled by an electro-mechanical actuator. Media may include, water, chemicals, gases, oil, steam, or other similar fluids. Engine Valves are used in engines to seal between combustion chambers and either the intake or exhaust systems. Key specifications include the intended application, head and stem diameter, and the material.

Opening and closing of engine valves are controlled by a series of cams and springs. They are available in several materials and types depending on the application which may include automobiles, trucks, motorcycles, etc. Faucet Valves are used for controlling fluid flow into basins or sinks and typically lack outlet connections, though some are equipped with threads for connecting hose, often called a hose bibb or spigot. Key specifications include valve type, actuator type, port connections, valve size, and the material that make up the valve body, which includes its seat, seal, lining, and stem packing.

Mounting type is another consideration. Faucet valves are used in laboratories, on drums, as hose bibbs, and can be made of inexpensive materials that can be discarded once a container's contents are emptied. Float Valves are mechanical devices which use hollow spheres or other shapes mounted on levers or tracks which open and close fluid inlets. A float valve is used primarily for maintaining fluid in a tank at a specific level. Key specifications include the intended application, port connections, valve size, float size, and the materials that make up the valve body, its seal and float.

Float valves are used in bathroom toilets to replenish the water level after a flush and in many tank-level control systems. Gate Valves are used mainly for blocking fluid flow and are less likely to be employed for flow regulation. A gate valve uses a plate-like barrier that can be lowered into the flow stream to stop the flow.

Its operation is similar to that of a globe valve except the gate provides less flow restriction than with a globe-valve plug when the valve is in the fully opened position. Key specifications include port configuration, port connections, valve size, and the materials that make up the valve body, its seat, seal, lining, and stem packing. Gate valves can use wedge-shaped plugs or parallel plates.

Plugs usually seal both the up and downstream sides of the valve while plates usually only seal on the upstream face. Wedges can take on a variety of design alternatives that reduce or accommodate wear of the sealing surfaces. Although the advantage of gate valves is their reduced head loss when open compared to globe valves, they are not useful for throttling and may not produce the positive shut-off that globe valves provide. Gate valves are used in wastewater plants, power plants, and process plants for shut-off and for isolating service.

Gate valves are usually designated as rising-stem and non-rising stem designs. The advantage of rising-stem valves is that they permit easy visualization as to whether a valve is open or closed.

The advantage of the Non-Rising Stem, or NRS valves, is that the stem is protected from exposure to corrosive or other environmental conditions by the valve bonnet. Neither design has much impact on the actual valve function. Globe Valves, named for their spherically shaped valve bodies that were at one time common, are also named for their use of a globe-shaped disc that constricts flow by closing against a restricting orifice.

The disc is opened and closed with a handwheel on manually operated valves and with an actuator and sliding shaft on automatic valves.

Key specifications include valve type, port configuration, port connections, valve size, and the materials that make up the valve body, such as its seat, seal, lining, and stem packing.

Globe valves are used for shut-off and regulating, and are used in wastewater plants, food processing facilities, and process plants, for example. The most common variety is the Z-style valve, so-called because of the path which the fluid follows through the valve body.

The shape of the disc can be varied to produce a valve that goes to full-flow quickly, or, by using a more tapered plug design, produce a valve that can precisely regulate flow. Globe valves can seal against the fluid flow or with it, depending on the requirements of the installation i. Like gate valves, globe valves can be rising-stem or NRS varieties.

Hydraulic Valves are mechanical or electro-mechanical devices used to control fluid flow in hydraulic fluid power systems. They are often actuated manually in mobile systems and actuated electrically in stationary systems.

Valves Guide

September 22, Different Types of valves uses in different sectors. In this article mentioned 19 types of valves 1. Globe valve , 2. Gate valve , 3.

Body; connected to the pipe Bonnet; mounted on the body to form a tight enclosure Stem; attached the structure gate or disk that resist the flow. The body of the valve is flanged with bolt holes in them to be held together with pipe; with a gasket in between to provide a leak-proof connection Valves,Types and Operations. Gate or Disk; controls the opening Stuffing Box; located in bonnet and filled with packing, holds the stem and avoids leaks Hand Wheel; lifts gate or disk on rotating and vice versa Seat Rings; perpendicular to flow, make close fit with valve for complete shut down Valves,Types and Operations. Valves are characterized by the way they resist the flow. Valves,Types and Operations. Stem is Threaded at the hand wheel and screwed through stem bushing Solidly connected with the hand wheel and turns along with it Bottom is solidly connected to the gate, neither of which can turn Valves,Types and Operations. Stem can be seen when the valve is open, therefore needs stem clearance.

Hello reader, In this article, we will read the Definition, Classification of the valve, and their functions. A valve is a component that controls and regulates the fluid or directs the flow of a fluid by various kinds of closing, opening, or by partially cut off fluid flow. So to controls the flow and pressure of fluid within a system, we used valves. The gate valve is a regular type valve that is used in any process plant. Here flow of fluid is controlled in linear motion.


Common Types. •. Butterfly Valves. Butterfly valves use a similar principle to ball valves. However, instead of a ball mounted in the valve body a circular disc.


Different Types of valves

Learn more. At their most basic, valves are devices that work to control, regulate or direct flow within a system or process. How a valve opens and closes will not only impact the overall performance but also determine how much control you have over the flow and how quickly the valve can operate. On top of the mechanical motion involved with a valve, also consider the method of actuation.

Control valves are imperative elements in any system where fluid flow must be monitored and manipulated. Selection of the proper valve involves a thorough knowledge of the process for which it will be used. Involved in selecting the proper valve is not only which type of valve to use, but the material of which it is made and the size it must be to perform its designated task. A complete control valve is made of the valve itself, an actuator, and, if necessary, a valve control device. The actuator is what provides the required force to cause the closing part of the valve to move.

3.9: Valves - Types, Kinds, and Selection

Types of Manual Valves

Many different types of manual valves are used in industrial applications worldwide. The following article will cover the general mechanism and function of the most typical of these valves used in steam systems, such as ball valves , butterfly valves , globe valves , gate valves , and diaphragm valves. For further details jump down to: ball valve , butterfly valve. Ball valves offer very good shut-off capabilities. This characteristic minimizes valve operation time and decreases the likelihood of leakage due to wear from the gland seal.

Valves are mechanical devices that controls the flow and pressure within a system or process. They are essential components of a piping system that conveys liquids, gases, vapors, slurries etc.. Different types of valves are available: gate, globe, plug, ball, butterfly, check, diaphragm, pinch, pressure relief, control valves etc. Each of these types has a number of models, each with different features and functional capabilities. Some valves are self-operated while others manually or with an actuator or pneumatic or hydraulic is operated. There are many valve designs, types and models, with a wide range of industrial applications.

Different types of valves are used in piping. In this article, I have covered classifications of valves and functions of valves. A valve is a device that regulates, controls, or directs the flow of a fluid by opening, closing, or partially obstructing fluid flow. A sound bit complicated? Ok, let me further simplified this. A valve is a mechanical device that controls the flow and pressure of fluid within a system or process. In piping following types of valves are used depending on the requirements.

Беккер беззвучно выругался. Уже два часа утра. - Pi'dame uno. Вызовите мне машину. Мужчина достал мобильник, сказал несколько слов и выключил телефон.

На бумажке был электронный адрес Северной Дакоты. NDAKOTAARA. ANON. ORG Ее внимание сразу же привлекли буквы ARA - сокращенное название Анонимной рассылки Америки, хорошо известного анонимного сервера.

Поскольку, находясь там, он ничего не смог бы предпринять, у меня оставалось два варианта: попросить его прервать визит и вернуться в Вашингтон или попытаться разрешить эту ситуацию самому. Воцарилась тишина. Наконец Стратмор поднял усталые глаза на Сьюзан. Выражение его лица тут же смягчилось. - Сьюзан, извини .

Valves, Types and Operations

 Подождите, - сказал Беккер.

Слыханное ли это. Отправляйся домой, уже поздно. Она окинула его высокомерным взглядом и швырнула отчет на стол. - Я верю этим данным. Чутье подсказывает мне, что здесь все верно.

Сотрудники почтительно кланялись, когда он проходил мимо. Нуматака хорошо понимал, что эти поклоны вовсе не свидетельствует об их любви к нему, они - всего лишь знак вежливости, которую японские служащие проявляют по отношению даже к самым ненавистным начальникам. Нуматака проследовал прямо на коммутатор компании. Все звонки принимались единственным оператором на двенадцатиканальный терминал Коренсо-2000. Телефонистка, державшая трубку у уха, мгновенно поднялась и поклонилась, увидев босса.

Фойе оказалось помещением с изысканной отделкой и элегантной обстановкой. Испанский Золотой век давным-давно миновал, но какое-то время в середине 1600-х годов этот небольшой народ был властелином мира. Комната служила гордым напоминанием о тех временах: доспехи, гравюры на военные сюжеты и золотые слитки из Нового Света за стеклом. За конторкой с надписью КОНСЬЕРЖ сидел вежливый подтянутый мужчина, улыбающийся так приветливо, словно всю жизнь ждал минуты, когда сможет оказать любезность посетителю. - En que puedo servile, senor.

9 Types of Industrial Valves

Обернувшись, Бринкерхофф начал всматриваться в темноту.

 - Он должен там. Ищите. Джабба окончательно убедился: директор рискнул и проиграл.

Мы узнали об этом лишь благодаря оперативности КОМИНТа.  - Стратмор внимательно посмотрел не.  - Я должен найти его партнера, прежде чем он узнает о смерти Танкадо. Вот почему я тебя вызвал. Мне нужна твоя помощь.

 Нет. Думаю, англичанка. И с какими-то дикими волосами - красно-бело-синими. Беккер усмехнулся, представив это зрелище. - Может быть, американка? - предположил .

Different Types of Valve In Mechanical or Piping Engineering [Notes & PDF]

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