Global Valve and Controls
23Apr/11Off

Top Notch Actuator And Valve Parts For Your Hvac Unit

The actuator and valve parts for your HVAC unit are very important to the functionality of your unit. The outside unit of your heat pump consists primarily of the condenser coil, a compressor and a fan. Most of the hard-working equipment is housed within the inside unit.

Any time your heat pump requires repair or maintenance, the technician will connect pressure gauges to make sure there is the correct amount of coolant. Liquid coolant will be added through a port on the outside unit if needed. Leaks are relatively rare, but they do occur. Occasionally coolant, also called refrigerant, will need to be drained and refilled.

Actuators and Parts

An actuator, by definition, is a mechanical device for moving or controlling a mechanism or system. Operated by some source of energy, it converts energy into motion. Consider the wheel and axle for example. Rotating the axle causes the wheel to move; and as a direct result, causing whatever is attached to the wheel to move as well.

Energy created by hydraulic fluid, electric current or pneumatic pressure may be converted into motion using an actuator. The actuator in your HVAC unit is likely controlled by electric current. They are used most commonly for inflow-control valves, pumps, motors, relays, switches and positioning drives.

The two most common types of actuator are hydraulic and electro-servo. A hydraulic actuator forces hydraulic fluid through cylinders or motors and is controlled by control valves. Hydraulic machinery produces very high amounts of power and makes use of a variety of actuators in the process.

A pneumatic actuator compresses air to use as its source of energy. They contain a piston, cylinder and valves. The piston is protected by the diaphragm, which keeps the compressed air in the upper portion of the cylinder. Air pressure pushes the diaphragm down, which moves the piston down as well.

Control Valves and Parts

Control valves are used to control the flow, pressure, temperature, or liquid level of various mechanisms. The valve may be partially opened or closed in order to maintain proper flow, pressure or temperature, as it does with your HVAC system. Control valves are generally opened or closed by using an electrical, hydraulic or pneumatic control system.

Valve bodies vary depending on their intended use. Angle valves consist of cage-style and disk-stack style bodies. Globe valves may have single, double or triple-way bodies as well as port guided single-port, balanced-plug cage-guided or high capacity cage-guided bodies. Rotary style bodies include butterfly, v-notch ball control, eccentric-disk control, eccentric-plug control valve bodies.

Control valve parts for your HVAC unit should always be purchased from a certified dealer or other trusted source. Replacing valves or parts isn't always an easy job and should be handled by a professional with experience.

Cost

Most replacement parts are relatively inexpensive. The most expensive part to replace is the compressor. It could cost several hundred dollars to replace a condenser. People often choose to replace the entire unit in lieu of simply replacing that single part.

The fan, control valves and actuators are fairly inexpensive to replace if they become worn out. They are in fact moving parts, so they do tend to wear out more quickly than parts that are stationary. Contact a professional HVAC technician if you feel that your heat pump or other HVAC unit isn't functioning to its potential.


About the Author:
HVAC Plus specializes in HVAC controls. Large selection includes Honeywell actuator and Honeywell valve parts for every need.

23Apr/11Off

A Preface To World Class Pneumatic Products

Flow control valves are used to return to normal the flow of water or some other liquid during a pipe. In this deference it is moderately similar to the ball valve. Though, as a replacement for of using a ball as an anchor, Flow control valve uses a recording that is inserted into the inside of the pipe. A pole is including through the disc in order to attach it to the actuator located on the outer surface of the pipe. What really makes the Flow control valve special than the ball style is that no material what arrangement it is in, the flow will generate a slump in force.

Flow control valves are confidential as quarter turn valves, and there are several different types to choose from. The best choice for you will depend on the required level of pressure and the purpose concerned. The most extensively used technique include the following types are,

flow control valve, square cylinders, rodless cylinder, Pneumatic Solenoid Valves, Textile Machinery Spares, Lakshmi Rieter Spares, Pneumatic Spares, Electrical and Electronic Spares, Textile Spares, Autoconer Spares, Schlafhorst Autoconer Spares and Trumac Blow Room Machinery Spares, Pneumatic Trainer Kit Air Preparation Units, Air Preparation Units, Air Cylinders, One Touch Fittings, Miniature Cylinders, Short Stroke Cylinders, Murata Spares, Schlafhorst Auto Corner Spares, Air Preparation Units, Air Cylinders, Spool Valves, One touch fittings, Airline Valves, Pneumatic cylinders, Miniature cylinders, Solenoid Valves, Actuators, Janatics Pneumatics Dealer - Cylinder, Valves, Savio, Spinning Spares, Sujatha Electronics, Rockwell automation, Salzer, Machinery Equipment Textiles, Fluff Collector Gun, Detaching rollers, Unilap Cylinders, Top Rollers & Draw Box Rollers, Pressure Hose.

In accumulation, Flow control valves also are different depending on their increasing system. The most universal design preference is the wafer style. These are practically reasonable and are designed to keep a seal against pressure from several directions which prevent backflow in systems that are only designed for one flow direction. They use a tightly appropriate seal, such as an o-ring and a flat face on both sides of the valve.

A new option you have is the transmit Flow control valve. These quality threads inserts on both sides of the valves body which allows you to begin them using two detach sets of bolts. It will in general be installed between 2 flanges so moreover side of the system can be severed without the other being concerned in any way. When this type is used in a dead end piping system it will feature a reduced pressure level. Throw level Flow control valves also are at variance when it comes to how they are positioned.

Flow control valves can be used in several special applications. Fire unit use them on their hoses which can limit the pressure they create, for example. They are also often used on front and rear suction ports, water pumps, and tanks. Besides simply acting as a regulator device, Flow control valves may also be used to regulate the flow of water in a pipe, which can essentially start and stop the flow as desired. The Flow control valve is one of the best known and valued designs available , being extremely valuable in its overly simplistic design.


About the Author:
Sovereign is the leading manufacturer and exporter of Textile Machinery Spares like Pneumatic Spares, Electrical and Electronic Spares, Textile Spares, Autoconer Spares, Schlafhorst Autoconer Spares, Trumac Blow Room Machinery Spares etc. Visit http://www.sovereign-sales.com

14Apr/11Off

Extraction And Refining Of Crude Oil

Oil refinery#Anacortes Refinery (Tesoro Corpor...

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Extraction of Crude oil is a process where the oil is removed from the undersurface by drilling oil wells and bringing the oil to the surface. It is then transported to the oil refinery by pipeline, ship or a truck. Oil refineries are usually located near rivers or other water bodies due to the usage of cooling water. The unprocessed fossil fuel needs to be refined and converted into a usable form for the final consumption. The fossil fuel industry is classified into various sectors or categories such as upstream, midstream and downstream. Exploration of Crude oil and drilling can be termed as upstream. Hence, this sector is known as exploration and production (E&P) sector.

The Determination of supply is done by the upstream industry, which is of utmost importance as it affects the prices in the downstream industry. The demand for oil is the main concern of the downstream and midstream sectors. Refining of Crude oil, selling and distributing the various end products such as asphalt, synthetic, rubber, plastics etc are the major activities of the downstream sector. Advancement in technology plays a major role in the exploration and extraction of Crude oil in the upstream industry. The seismic surveys and various instruments help in detecting the oil reservoirs. Once the reservoir is located, the density is determined by sending radio waves into the earth's surface. A three dimensional seismic imaging is used to send the radio waves. From the data obtained by the seismic models, scientists determine the reservoir size.

The companies in the upstream sector should devise a plan to forecast the demand and calculate the rate of extraction so that the reserves don't go dry. Based on the amount of Crude oil explored and extracted, the amount of oil that can be processed is determined. A hole is drilled to make oil bore wells and a steel pipe is fitted into the hole, after which a collection of valves is mounted on top. In some geographical locations, the oil comes naturally to the earth's surface. Various huge pipes and vessels are used in the refinery to separate the hydrocarbons from the Crude oil. The oil refinery is operated by highly automated control rooms. The most common process units found in a refinery are Desalter, Catalytic reformer, hydrocracker, coking etc.

Fractional distillation is a process where, at different boiling points, the hydrocarbons contained in the Crude oil are broken down into fractions. Various heating furnaces are used for the fractional distillation of Crude oil. The distillation tower holds the heavier fractions at the bottom and those in the lighter form, in gaseous state gets settled at the top inside the distillation tower. A network of reactors and huge burning furnaces are used to crack heavy hydrocarbon molecules into lighter fractions. Cat cracking or catalytic cracking is where intense heat and a material that speeds up the chemical reaction are used in the cracking process. Purifying and blending are the major processes when it comes to refining. The fractions are made to cool and then they are blended to make products such as gasoline, heating oil, diesel oil, kerosene, plastics, jet fuel etc.

 

About the Author:
For more information and details of How and Why to Invest in Oil, safe Investments through Oil ETFs, Crude Oil Prices, Oil Price trends,
Extraction of Oil, do visit our site - http://www.oilprices.org/

 

 

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12Apr/11Off

Innovation Into The Main Theme Of The Valve Industry – Quality Medical Supplies – China Quality

"In the fierce market competition, and who has the right technology, who has excellent product quality, who can constantly develop new products, who will be able to head start in the competition won." Zhejiang Yongjia Valve Association, Inter-Xuan Ye May 21, held in Hangzhou, China General Machinery Industry Association, the fifth branch of the second valve, said members of the General Assembly.

The overall level of the industry needs to be improved

Valve oil, chemical, power station, long-distance pipeline, shipbuilding, nuclear industry, a variety of low-temperature projects, aerospace and marine oil and other economic sectors indispensable fluid control equipment. After 20 years of development, China is about 6000 companies of all sizes valves are more than the number of firms in the world first, in which more than 5 million yuan annual output value there are 900.

From the product point of view, China's valve industry is now capable of producing more than a dozen major categories products, such as gate valve, globe valve, ball valve, butterfly valve, safety valve, check valve, throttle, plug valves, pressure reducing valve , diaphragm valves, steam traps, emergency shut-off valve and so on, the maximum temperature reached 570 , a minimum of -196 , the maximum pressure of 600MPa, the largest diameter to 5350 millimeters.

In addition, according to the relevant sectoral statistics, China's valve market turnover each year up to 500 billion yuan, of which the market been more than 100 billion yuan of foreign occupation of the valve business. Although the reform and opening up of China's valve industry made great progress, but there are still some problems: Since the low-level redundant construction, resulting in the valve leading products companies continue to be low-end mass products.

In addition, China's current production of various valves widespread leakage, internal leakage, appearance quality is not high, short life, the operation is not flexible and valve electric devices and pneumatic devices are not reliable shortcomings, some of the products only is equivalent to the early 80s of last century the international level. Some high temperature and pressure and critical devices in need of the valve is still dependent on imports. In addition, the industrial structure of China's valve industry, valve industry, industrial chain, as well as the degree of specialization and other aspects of the industry, both in comparison with foreign countries there is a big gap.

Industry expert analysis, resulting in poor product quality of domestic valve is mainly due to: the market rapidly expanded, the original state-owned enterprises have Guantingbingzhuan valve, private enterprises developed rapidly. The starting point for private enterprises is low, technical force is very weak, poorly equipped, the products are mostly to imitate the production, especially in low-pressure valves used in water supply and drainage, a problem more serious.

Driven product development, technological innovation

So how do you break through this bottleneck and speed up the valve industry development? China General Machinery Industry Association valves Branch of Bank of legislation that the Secretary-General's Song, according to the valve market changes and the future national development projects for some time and related policies of the next valve business of technology and product development should focus on the following aspects:

In product development, it is necessary for large projects, one developed complete sets of Engineered Valves, and second, focus on the multi-species and multi-product manufacturing specifications. Based on the current national key project development plan, the valve industry, "Eleventh Five-Year" period and the demand for the next few years, mainly in long-term pipeline valves, "Water Diversion Project" and other fields. Only long-term pipeline valves, "Eleventh Five-Year" and the coming years are also expected to build 20,000 km of gas pipeline, pipeline ball valve for large great demand. "Eleventh Five-Year" period is expected to a new high-pressure pipeline 5,000 kilometers of crude oil requires large-diameter high-pressure valves more than 3,000. "Water Diversion" is China's cross-century project, east, central and western third line needs a total investment of more than 450 billion yuan. Among them, the Eastern Water Project required a large number of large-diameter valve, special square valve, special valve and pump stations supporting the valve.

In technological innovation, we must attach importance to the adjustment of product structure, research and development and international leading level of high value-added products is crucial. West-East line in charge of the tender, the domestic enterprises to defeat the valve is a painful lesson. Learn from their mistakes to the revitalization of the valve industry must be developed with high technological content and high added value, with the international leading level of valve products.

The implementation of technical innovation, research and development of new products, enterprises have couple of choices: First, scientific research institutions and institutions such as the recent Kaifeng High Pressure Valve Factory and a subsidiary of Chinese Academy of Sciences, "3D" company co-developed power plant boiler main steam valve is the leading international standard of products, its "pressure drop" significantly below international standards, in the power plant industry has a very broad prospects; second, in cooperation with foreign countries or to take the form of technology import, Zigong High Pressure Valve Co., Ltd. and Italy Simbi Long the company's co-operation to shorten our product in the valve gap with foreign countries. Of course, the conditions of the enterprises also can be independently developed.

In market development, the diversification should be implemented sales strategies, and strive to open up the international market. To open up international markets, we must first focus on the cultivation of foreign trade; Second, we must learn to use the Internet and information technology, to capture business opportunities; third can be some domestic foreign trade companies, with its channels to increase exports; the fourth is qualified enterprises can be set up outside the point of sale, or setting up factories.

Industry experts believe that the industry as soon as possible to change the status quo between the low-level redundant construction, the most effective way is through the joint between enterprises, mergers, and restructuring to achieve corporate expansion capital to further expand its market share, so as to stand in the competition unbeaten. This is more popular in today's international economic practices, but also the future direction of development of the industry during the valve problem. As long as there are joint enterprises may be may be so bold to try and break regional boundaries, breaking the boundaries of ownership, breaking the traditional boundaries of the professional division of labor, and strive to build a number of short-term value of more than 500 million yuan or 10 billion enterprise groups.


About the Author:
The e-commerce company in China offers quality products such as Quality Medical Supplies , China Quality Medical Supplies, and more. For more , please visit today!

2Apr/11Off

Valves and More at Global Valves and Controls

Duplex valve / ball valve.

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Pipeline Ball Valves are manufactured and tested in accordance with the requirements of API 6D, and are designed not to rely on lubricant to ensure that they seal.
During manufacture and factory testing, the use of lubricants and/or sealants is prohibited. This is to prevent masking of any defects in the new valve.
Installation and commissioning into a pipeline is an interventive engineering process, making use of hot and cold working techniques relying on mechanical tooling. As a result it is inevitable that between valve installation and commissioning, an amount of foreign debris will enter the valve (i.e. sand / dirt / swarf / weld slag). This is a natural result of the manufacturing process that cannot be avoided.
Once installed the valve is usually cycled during the testing of its gearbox or actuator, and again during hydrostatic testing of the pipeline.
These activities create tiny scratches on the polished ball surface where the debris present in the line wears on the ball and seat during the cycling of the valve.
In time, this reduces the valves ability to provide an adequate seal, as these tiny scratches begin to cause minor leak paths. All fluid and gas flows contain an element of contaminant which contributes to this effect over the life of the valve.
Minor leak paths that seal at low pressure become obvious when using the valve to isolate high pressure gas. Seating material is often softer than the ball itself in order to provide a pliable material which takes up minor leak paths, but at higher pressures the gas compresses the seats and they become less pliable meaning that the minor leak paths become more significant at higher pressures.
This type of damage mechanism can also be said to be true for gate and plug valves, as gate and plug surfaces are also susceptible to the similar damage. In fact any sealing surface subject to mechanical friction is susceptible to the damage mechanism described above.
Lubricants, lubricant-sealants and emergency-sealants
Lubricants help clean valve internals, and reduce operating torque. Valvecare use a light lubricant called Equa-Lube Eighty from Sealweld immediately after hydrostatic testing of valve, to purge all test water from seat pockets where corrosion normally occurs. The advantage of this is that it removes as much debris as possible from the internal mechanism of the valve, thus reducing the chance for wear. Lubrication also reduces the friction between the wearing surfaces.  Of course, new contaminant can be introduced at any time via the flow in the pipeline.
Lubricant-Sealants help to preserve seat sealing effectiveness, and to seal worn valves with minor leakage problems. Valvecare use a lubricant-sealant called Total-Lube # 911 from Sealweld, this has been proven to seal minor scratches to sealing surfaces and shallow corrosion pits, as well as small nicks and cuts on soft seals.
For valves with sealing surface scoring, this is an effective way to achieve a bubble tight seal on a valve that would otherwise fail a leak test. Use of lubricant-sealants can delay or prevent the need for costly overhaul of a worn valve.
Emergency Sealants provide an effective temporary means of creating of leak tight seal, even on valves with severe leakage problems. Valve sealing plays an important role, when performing pipeline repair, modification or renewal work, as often the costs of shutting down, evacuating, draining, and excavating pipeline equipment are typically many times more than just the cost of a new valve. Valvecare use a Valve Sealant called Ball Valve Sealant #5050 from Sealweld, containing particles of PTFE, and is capable of sealing relatively large scratches to sealing surfaces.
Lubrication
Lubrication is introduced into the valve, using the seat injection fittings. Valves that do not have seat injections fittings can usually be retrofitted to include these. Specialist valve maintenance companies, such as Valvecare, can advise you on specifics for individual valves.
Seat lubrication, is a proven means of cleaning foreign debris from valve seats, and done properly as part of a scheduled valve maintenance programme, stops debris from getting there in the first place. This practice significantly reduces damage suffered during installation, commissioning and normal cycling operation, extending the service life of the valve dramatically. The costs associated with a scheduled maintenance program including lubrication are considerably lower than a full overhaul or replacement of the valve itself.

Lubricating your valves gives the following operational advantages:
  • Cleans their seats of potentially damaging particles (Sand / Dirt / Swarf / weld slag)
  • Stops debris from getting stuck between seats if administered before pigging pipeline
  • Prevents and removes stiction (Torque to operate reduced / less strain on stem and actuator)
  • Preserves the life of their seals, and components against mechanical and corrosion damage
These advantages reduce operational cost and should therefore form part of your planned valve maintenance programme.
Sealing
Emergency Sealing involves the introduction of heavy sealant, through the valve seat injection fittings, to achieve a temporary seal.  Valves that do not have seat injections fittings can usually be retrofitted to include these. Specialist valve maintenance companies, such as Valvecare, can advise you on specifics for individual valves.
Emergency Sealing your valves:
Provides an temporary bubble tight seal, even on valves with severe leakage problems
Has significant cost savings, when compared to alternatives
Saves time, with lead times for some replacement pipeline valves taking several months
The Lubrication, lubricant-Sealant and Emergency Sealant process involves the use of specialist equipment, capable of pumping a range of lubrication and sealant types safely at pressures of 10,000–15,000 psi. It is recommended that trained valve service engineers, proficient in the safe use of sealant guns and pumps, carry out this procedure.
Important Considerations
Lubrication and sealing becomes more critical in applications such as Natural Gas, Production Wellheads, Gathering Systems, Gas processing Plants, Pipelines, Gas Storage Facilities and Gas Distribution Systems. Applications like these are more likely to cause damage to the critical sealing surfaces of valves, due to the lack of lubrication present in dry gas, and the presence of sand and debris in production wellheads. As part of a valve maintenance programme, preventative valve maintenance helps minimises the adverse effects of these services, increasing the service life of your valves.
For increased valve service life, the presence of an emergency seat sealant injection feature is an important consideration when procuring pipeline valve stock.
Equally as important is the choice of injection fittings and/or adaptors that are installed on the valve. Sealant injection fittings feature a means of passing sealant or lubricant into the valve, and incorporate a high pressure metal seated check valve. As a safety precaution, Valvecare do not endorse the use of carbon steel, crimped style injection fittings. As standard, we only recommend the use quality stainless steel injection fittings incorporating a threaded spring retaining cage, in order to minimise the risk of dangerous fitting failure.
Valve lubrication and sealing is an essential part of an effectively managed valve maintenance programme. Once installed and lubricated, a regular documented lubrication schedule should be established for all critical valves. Valvecare specialise in a supplying a total management programme for your valves, with a focus on the criticality of valves in relation to impact on safety elements and production, maintenance routines, spares holding, valve tracking and selection procedures. This type of valve management programme is a highly effective way of optimising reliability and safety whilst minimising cost and downtime.
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1Apr/11Off

Global Valve and Controls has become one of the newest organizational members of ASTM

ASTM International logo

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Created in 1898, ASTM International has become one of the largest voluntary standards developing, not-for-profit organizations in the world. ASTM provides a forum for the development and publication of voluntary consensus standards for materials, products, systems, and services from its members. The members of ASTM represent producers, users, consumers, government, and academia from over 100 countries and are responsible for the development of technical documents that are the basis for manufacturing, management, procurement, codes, and regulations.

What is a standard?

As used in ASTM, a standard is a document that has been developed and established within the consensus principles of the organization and which meets the requirements of ASTM procedures and regulations. Full consensus standards are developed with the participation of all parties who have a stake in the standards’ development and/or use.

How and where are ASTM standards used?

ASTM standards are used by individuals, companies, and agencies around the world. Purchasers and sellers incorporate standards into contracts; scientists and engineers use them in their laboratories and offices; architects and designers use them in their plans; government agencies around the world reference them in codes, regulations, and laws; and many others refer to them for guidance.

For more information on ASTM, go to www.gvcintl.com and click on the ASTM hyperlink.

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1Apr/11Off

Making Use of Steel Ball Valves

A sample of duplex ball valves.

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Making Use of Steel Ball Valves

When it comes to infrastructure, we can really name a lot of companies which are getting into it and one of the most in demand services anywhere today is plumbing. Without plumbing, people would always have a ruin day due to an inadequacy of water. More than that, when we are also going to talk about plumbing, we also need to consider the things that they mostly use and one of which are those valves that are useful in order to make a job successful. If you are among the plumbers, you will surely look for the most durable and top-quality kind of valve, and in such case, the use of steel ball valves should be taken account.

There are now plenty of manufacturing companies who had study hard in order to make the best valve to use in any sorts of plumbing activity and good thing was, Global Valve and Controls had able to establish the perfect valve to be used in any sorts of plumbing constructions. Steel ball valves are among their recent valves being made which has been establish through the finest technological method and had able to pass various evaluations from experts as well. With these steel ball valves, you can really have the guarantee that this would last long despite the fact that it is being use constantly.

Global Valve and Controls had undergone careful study in order to perfectly design the right valves to be use in all sorts of plumbing construction. GVC’s have their own technical support team who see to it that all steel ball valves are of top quality and will even provide you with best function. You can now start buying these steel ball valves since these are now available in all markets in your place.

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