2013年10月18日星期五

The background of the safety balve

As soon as mankind was able to boil water to create steam, the necessity of the safety device became evident. As long as 2000 years ago, the Chinese were using cauldrons with hinged lids to allow (relatively) safer production of steam. At the beginning of the 14th century, chemists used conical plugs and later, compressed springs to act as safety devices on pressurised vessels.

Early in the 19th century, boiler explosions on ships and locomotives frequently resulted from faulty safety devices, which led to the development of the first safety relief valves.
The first safety valve was invented by Denis Papin for his steam digester, an early pressure cooker rather than an engine. A weight acting through a lever held down a circular plug valve in the steam vessel. By using a "steelyard" lever a smaller weight was required, also the pressure could easily be regulated by sliding the same weight back and forth along the lever arm. Papin retained the same design for his 1707 steam pump.
A safety valve is a valve mechanism which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits.
Safety Valve is a one type of valve that automatically actuates when the pressure of inlet side of the valve increases to a predetermined pressure, to open the valve disc and discharge the fluid ( steam or gas ) ; and when the pressure decreases to the prescribed value, to close the valve disc again. Safety valve is so-called a final safety device which controls the pressure and discharges certain amount of fluid by itself without any electric power support.
Safety Valve is mainly installed in a chemical plant, electric power boiler, gas storage tank, preventing the pressure vessels from exploding or damaging.
Pressure safety valves are automatic or manual release devices designed to expel gas or liquid from a mechanical system if the pressure rises above a set limit. Also known as pressure relief valves, they are mechanical devices that function by way of weights or springs, or electronic that has sophisticated sensors to engage operation. There are three main types of pressure safety valves used in both industry and commercial machines are thermal, flow and shut-off valves.
Flow valves are different from thermal valves in that they are very often considerably larger. Flow valves are sized for situations when larger quantities of gas or liquids may need to be quickly released to relive growing pressure. Flow valves are often used for larger storage tanks or pipelines when a significant rupture could cause much damage.
Edit by  http://springcheckvalve.com

2013年9月23日星期一

To change radiator valve

A thermostatic radiator valve (TRV) is an automatic regulation valve that controls the flow of hot water through heating radiators based on the temperature in the room in which it is located. The valve typically features an adjustable temperature setting that allows occupants to select a comfortable temperature in their environment and automatically adjusts the internal mechanism, thereby closing or opening it as required. Radiator systems fitted with TRVs not only deliver convenient hands-off temperature control but also make hot water systems more efficient with significant cost and CO2 emission savings. TRVs may be used on most radiators, towel dryers, or convectors and are available in off-the-shelf or custom units.
The easiest way to fix a damaged radiator valve is to either clean it or swap it out for a new one. Changing it involves turning off the water source, placing the pan under each location that you work on, draining the radiator, closing all valves that were previously opened, and finally Use the channel lock wrench to remove the small section of pipe that goes into the radiator and replace it with the new one that comes with the new radiator valve kit.
Changing a radiator valve on your car can be hard and dirty work. However, if you follow these steps carefully, there should be no problems replacing the valve.
The valve sensor consists of a metal bulb filled with a heat sensitive substance such as wax. This substance will contract and expand according to the ambient temperature it is exposed to, and it is this motion which activates the rest of the mechanism. An adjustable temperature dial dictates the time taken for the sensor bulb motion to act on the mechanism, thereby allowing for a range of ambient temperature settings to be chosen. When the bulb expansion does act on the mechanism, it opens or closes the valve spindle. In this way, the valve supplies hot water to the radiator when the temperature in the room drops below the selected value and shuts it off again once the temperature has been restored.
1、Take off the radiator cap and turn the drain valve that is at the bottom of the radiator with a wrench to drain the radiator.
2、 Find the radiator hose and take it off with a flathead screwdriver.
3、 Expose the thermostat by removing the bolts on both sides of the thermostat with a wrench.
4、 Scrape the bottom of the thermostat housing and where the housing meets the surface with a gasket scraper.
5、 Put on the new thermostat and then once in place, on both sides of the newly replaced thermostat gasket, put gasket sealer on. Put the housing over the thermostat and then tighten the bolts with a wrench.
6、 Put the upper radiator hose on the housing of the thermostat and tighten the clamp with a screwdriver. Make sure to close the radiator's drain valve by turning it clockwise with a wrench and fill the radiator with antifreeze.
7、 Put the radiator cap back on.
Edit by TENGFENG COPPER INDUSTRY COMPANY NINGBO OFFICE
http://www.springcheckvalve.com/news/To-change-radiator-valve.htm

2013年9月12日星期四

The M Series line of ball valves

Cimberio Valve, Malvern, Pa., offers the cimPUSH line of push-to-connect ball valves. The valves connect to PEX, CPVC and copper pipes in any combination without tools, glue or solder.
The M Series line of ball valves comprises four configurations for steam and other industrial fluids. The valves features a blow-out proof stem, a modular seat/seal assembly for smooth operation at high pressures, a integrated seat and body gasket, and a floating ball for tight shutoff under ANSI Class VI.
Designed for a range of applications handling water, air, food products, gases, petroleum products or aggressive chemicals, these ball valves are made in sizes from 3/8- to 6-in., and are available with pneumatic actuators, electric motor operators, or manual control with levers and hand wheel gearboxes. Both 2- and 3-way models are made with operating pressures from 0 to 3000 psig.
High Pressure Equipment Co. (HIP) has introduced a 0.5 in. orifice size line of trunion-style ball valves designed specifically for severe-duty applications. Available in two-way and three-way configurations, the 0.5 in. valve has a pressure rating of 10,000 psi and offers the same features as HiP's 0.187 and 0.375 in. trunion ball valves. All three sizes connect to a wide range of tube sizes and have 316 stainless-steel constructions. With the trunion-style closure, these valves are used for liquid shut-off or gas flow in severe duty applications.
Recent steps in ball valve technology may be attributed, in part, to advances in material technology, particularly for valve seats and O-rings. Anyone selecting a ball valve should carefully match the valve's operating conditions to the appropriate seat material.
Rated for full vacuum service, this cross port ball valve's 3-way design permits multiple flow patterns because of the crossed flow corridors within the ball. It is available in sizes of 1/2- to 2-in., and is manufactured from PVC, CPVC, PP or PVDF, making it well-suited for handling highly corrosive liquids in a variety of industries.
Its design achieves four flow patterns through three ports using one valve, which permits flow from common port to left or right ports to "off" position. To accomplish this in past would would have required two different valve body styles and two different ball configurations. Available with electric or pneumatic actuators, the valve has "L" port as standard and Tee Double L porting optional. Asahi/America Inc, Maiden, MA.

2013年8月28日星期三

Bibcock

A bibcock is a faucet installed at a downward-pointing angle. Also known as a sillcock, this design is especially common for outdoor faucets and some kinds of sink taps. Most hardware and plumbing suppliers carry bibcocks, along with replacement parts, and people can also fabricate their own or order them for custom applications. People sometimes refer to outdoor faucets of this design as hose bibbs, a reference to the fact that they are most commonly used to connect for hoses for watering, washing the car, and similar tasks.
This design often features a threaded tap, allowing people to screw various attachments on. These can include attachments such as screens to distribute the flow of the water evenly, as seen on many kitchen sinks, along with hoses and faucet extenders. A seal is usually needed between the attachment and the faucet to prevent water from leaking out around the threading. The bibcock can be controlled with a variety of valves and taps, typically situated close to the faucet so people can easily turn it on and off.
Depending on the materials used, the durability of a bibcock can vary. Those designed for the outdoors are usually heavy and may have design features intended to prevent freezing. This can be important in cold climates, where pipes can explode in a cold snap and leak water, leading to further damage, as well as waste. Often, pipes are insulated with jackets, but the bibcock must be left exposed, and a poor design can be vulnerable to freezing. Valves designed to check the backward flow of water may also be required to prevent contamination of a water supply.
A common problem with bibocks involves loosening over time of the valve used to control the tap, leading to leaks. Sometimes, a gasket can be replaced, but in other instances, it may be necessary to replace the valve. The water supply should be turned off before doing this kind of work and it may be necessary to call a plumber if the plumbing is complex or if replacing the tap does not seem to address the issue.
In some cases, the building code may require people to install a bibcock for safety or other reasons. Contractors will know more about the plumbing code requirements in a given region and can provide information on adhering to those requirements during construction and remodeling. Plumbers usually install compliant fixtures and supplies when they do installation and repair work, and may sometimes recommend changes to a plumbing system to make it code compliant.

2013年8月27日星期二

Bibcock

A bibcock is a faucet installed at a downward-pointing angle. Also known as a sillcock, this design is especially common for outdoor faucets and some kinds of sink taps. Most hardware and plumbing suppliers carry bibcocks, along with replacement parts, and people can also fabricate their own or order them for custom applications. People sometimes refer to outdoor faucets of this design as hose bibbs, a reference to the fact that they are most commonly used to connect for hoses for watering, washing the car, and similar tasks.
This design often features a threaded tap, allowing people to screw various attachments on. These can include attachments such as screens to distribute the flow of the water evenly, as seen on many kitchen sinks, along with hoses and faucet extenders. A seal is usually needed between the attachment and the faucet to prevent water from leaking out around the threading. The bibcock can be controlled with a variety of valves and taps, typically situated close to the faucet so people can easily turn it on and off.
Depending on the materials used, the durability of a bibcock can vary. Those designed for the outdoors are usually heavy and may have design features intended to prevent freezing. This can be important in cold climates, where pipes can explode in a cold snap and leak water, leading to further damage, as well as waste. Often, pipes are insulated with jackets, but the bibcock must be left exposed, and a poor design can be vulnerable to freezing. Valves designed to check the backward flow of water may also be required to prevent contamination of a water supply.
A common problem with bibocks involves loosening over time of the valve used to control the tap, leading to leaks. Sometimes, a gasket can be replaced, but in other instances, it may be necessary to replace the valve. The water supply should be turned off before doing this kind of work and it may be necessary to call a plumber if the plumbing is complex or if replacing the tap does not seem to address the issue.
In some cases, the building code may require people to install a bibcock for safety or other reasons. Contractors will know more about the plumbing code requirements in a given region and can provide information on adhering to those requirements during construction and remodeling. Plumbers usually install compliant fixtures and supplies when they do installation and repair work, and may sometimes recommend changes to a plumbing system to make it code compliant.

2013年8月14日星期三

How to Control Pool Filter Valves

Pool filters are designed to catch and remove debris from a residential or commercial swimming pool. The filter system typically includes several valves, which are responsible for draining out the filter and removing excess air from the filter system during startup or draining. Operating and controlling the valves on the pool filter correctly will help prevent problems and can keep the filter working well.
1、Locate the valves on the pool filter. Generally speaking, there is an open air relief valve on top of the filter, an open valve extending from the upper side of the pump and from the strainer that is connected to a suction valve, and a drain valve on the lower side of the pump.        
2、Open the air relief valve on top of the filter two or three rotations when starting the filter and then close when a steady stream of water flows out of the valve.        
3、Rotate the open valves on the top side of the filter and on the pump strainer counterclockwise to open when starting the filter.        
4、Keep the drain valve closed when the filter is started or operating.        
5、Close the open valves when cleaning the filter or replacing the filter cartridge. Open the drain valve and the corresponding suction valve to flush out the close valve until the water runs clean. Replace any drain plugs that are worn or broken. Close the drain valve.
We are supplying all kinds of brass Y-strainer and filter valve.The Y-Strainer valve have brass,zinc-alloy and bronze material,some filter valve is flanged connect. The size of Y-strainer valve from 1/2" to 2",filter valve with female/male ways and stainless steel screen. Brass color, nickel plated are all avaible.

2013年7月28日星期日

Do you know more about Brass ball valve

Ball valves has a muted yellow color, somewhat similar to gold. It is relatively resistant to tarnishing, and is often used as decoration and for coins. In antiquity, polished brass was often used as a mirror.
Brass is the proportions of zinc and copper can be varied to create a range of brass ball valve with varying properties.In comparison, bronze is principally an alloy of copper and tin.
Despite this distinction, some types of brasses are called bronzes. Brass is a substitutional alloy.It is used for decoration for its bright gold-like appearance; for applications where low friction is required such as locks, gears, bearings, ammunition, and valves; for plumbing and electrical applications; and extensively in musical instruments such as horns and bells for its acoustic properties.
Now with that background, which filter is best? I often use this question to gauge who I am talking to in a pool store. Just ask: "Which filter is best" and then listen for the answer. There is only one correct answer to that question: can you please define best? If the answer is any of the three, someone is trying to simply sell you something. Brass was used to make fan blades, fan cages and motor bearings in many antique fans that date before the 1930s. Brass can be used for fixings for use in cryogenic systems, however its use is not limited to this.
We supply different kinds of brass ball valves, size from 1/4" to 4". Brass ball valves working medium: water, gas. The ends of thread F/F. F/M. M/M are the normal ball valves, but we can also supply the ball valves for PEX pipes. Straighter normal brass valves, angle valves and mini ball valves are all available. For the body of ball valve, we can make it from brass and zinc, and for the ball, it is usually made from brass chrome plated, but if you need cheaper, we can make it in steel chrome plated. The brass ball valves thread standard: ISO228/ISO7/1.
600WOG Ball Valves

2013年7月16日星期二

Manifold valves

We are main exporter of different kinds of manifold valves and filter valve in China, including brass bar manifolds, manifolds with female/male ways, manifolds for pex pipes, water separators, manifolds with valves sets, the filter valve size have: 16x3/4" F/M 16x1"F/M and so on; brass color, nickel plated and chrome plated are all avaible.
Improper design of a sprinkler system will always result in the worst consequences for your lawn, including overly wet or dry areas. Essential to the design of a sprinkler system is its valve manifolds, which divide the distribution of water into zones. It is important to build valve manifolds properly in order to ensure durability and efficiency. Luckily, building a valve manifold properly is a task that almost anyone can accomplish if given the right instruction.
1、Wrap Teflon tape around the treads of the tube adapter, threaded valve ends, and all of the close nipples. Don't wrap too much Teflon tape around the threads; three times around should be fine.         
2、Insert the tube adapter into one of the elbows by turning it clockwise. Get it as tight as you can with your hand, and then use the channel locks to tighten it two full turns more. Insert a valve into into the other elbow and secure it in the same way you did the tube adapter.         
3、Insert any addition valves into the perpendicular end of a "T" fitting (one valve per fitting), and secure it using the same method as before.         
4、Join the PVC fitting by threading them together with the close nipples using the same method as before. Make sure to start with an elbow, join all the "T" fittings in a line facing the same direction and loosen the valves if necessary to face them all right-side-up. Finish by threading the last elbow onto the final open "T" end with a close nipple.
Manifold valve

2013年6月7日星期五

Brass Ball Valves

we supply different kinds of brass ball valves, size from 1/4" to 4". Brass ball valves working medium: water, gas. The ends of thread F/F. F/M. M/M are the normal ball valves, but we can also supply the ball valves for PEX pipes. Straighter normal brass valves, angle valves and mini ball valves are all available. For the body of ball valve, we can make it from brass and zinc, and for the ball, it is usually made from brass chrome plated, but if you need cheaper, we can make it in steel chrome plated. The brass ball valves thread standard: ISO228/ISO7/1.
Taizhou Tengfeng Copper Industry Co., Ltd. was founded in February, 1987, located in Xudou Industrial Zone, Yuhuan City, Zhejiang Province, China. We are a professional manufacturer that specializes in producing brass ball valves, zinc alloy ball valves, bibcocks, angle valves, stop valves, check valves, gate valves, floor drainers and pipe fittings.

Our company covers 3000 square meters and has more than two hundred employees, including more than 20 technical designers and superior managers. The annual sales value is more than 30 millions. We own advanced machines and equipment, flowing assembly line and automation network. The whole of our processing design and measure is strictly performed with our quality controlling systems.

Our company has attained ISO9001:2000 quality system certification. We insist on scientific management and implement quality policy of "quality is first, customer is uppermost" and keep it as our permanent production faith. So good credit standing has constructed a famous brand "Tengfeng".

With advanced production technology and precise artwork, our company is famous for competitive products, reasonable prices and knight services. Our products are sold to North America, Europe, the Middle East and Asia, about more than twenty countries in all.

We sincerely welcome clients both from home and abroad to visit our company. We believe that our competitive products and service will help you to increase market share. Please feel free to contact with us.

2013年5月30日星期四

A Malleable Iron Pipe Fitting

Malleable iron pipe fittings hold two different pipe parts together and direct the gas and liquid movement. Some malleable pipe fittings are threaded, meaning that they have grooved ends that allow plumbers to screw the pipe fittings on the pipes, letting plumbers connect different pipes together.
Composition          
Malleable iron pipe fittings can come in black and galvanized finishes. The three forms of malleable cast iron include whiteheart, blackheart and pearlitic malleable cast iron. The surface zone of the whiteheart malleable cast iron has ferrite. The intermediate zone has temper carbon, ferrite and pearlite. Tempering refers to the hardening of metal. Blackheart malleable cast iron is mostly made of ferrite. The pearlitic malleable cast iron is made from pearlite and other austenite products. Pearlite is made from alternating layers of ferrite and cementite.     
Types          
Malleable pipe fittings come in a variety of shapes, depending on the applications that the plumber will use the fittings for. These shapes can include the elbow, a fitting that curves to send the pipe in certain direction. Another pipe fitting type, the side outlet elbow, is like the regular elbow, but has an added side outlet. The tee has three openings, with two on both ends of the pipe and one on one the side. The side outlet tees have four openings, one that is the side outlet. The cross has four openings, with each opening having a corresponding opening on the other side. These different fittings allow the plumber to send pipes in different directions and let pipes feed into each other.     
Malleable Iron          
Malleable cast iron is an alloy of iron carbon that engineers treat with heat. When first cast, the iron does not have any graphite. All the carbon content is in cementite form. Malleable iron typically has 2 to 3 percent carbon, 1 to 2 percent silicone, 0 to 1 percent manganese and small amounts of sulfur and phosphorus. Malleable iron has a high toughness due to its nodular graphite and the low-carbon content. Graphite forms in a way that makes the graphite not spherical but irregularly shaped.     
Machinability          
Engineers prefer malleable iron for parts that need to be coined, pierced or cold-formed. Cold forming refers to the process of rolling or pressing thin gauges of steel sheet into usable materials. Malleable iron works well for parts that need to have the most machinability, meaning the parts are easy to make using a machine. It also works well with pieces that need to resist impact under cold temperatures.
Malleable iron pipe fittings nipples

2013年5月22日星期三

What Is a Foot Valve?

Various types of valves are required to maintain optimum function of water and air pumps, and among these valves are foot valves. Foot valves are used to prime up a centrifugal pump; they are known for their efficacy and affordability.
Description          
Foot valves are a type of check valve and are placed at the pump's wet well. Unlike other valves, a foot valve is created with a larger flow area than the actual pipe size to make sure that there is less head loss. Foot valves are either made of PVC plastic or stainless steel, and they are known for keeping the continuous presence of suction within the pump.     
Function          
Foot valves are used to maintain hydraulic pressure to keep the water flow in accordance with the given settings or configurations. There are instances where the pressure can actually pop the valve out and cause major leakage; thus, it is important to use the right kind of material in the tubing to be able to support the force within the valve.     
Features          
Being an important part of a centrifugal pump, foot valves come with easily manageable features. Most foot valves are designed with a self-tapping male and female threads to ensure easy installation; internal balls for quick sealing and valve reaction; and flexibility to fit various types of water pump uses, such as well development and volatile organic compounds sampling and purging. Although they are cheaper to use, as compared to other valves used to prime a pump, foot valves are usually made up of heavy duty cast iron and bronze, as well as PVC (depending on the type) so that they will last longer while submerged in the water.     
Types          
There are three types of foot valves. The micro-flow system valves are used in direct push technology micro wells and multi-level well installations. These are usually made of stainless steel and are either of fluorotherm (FEP) or high-density polyethylene (HDPE) tubing. The high-flow system valve is used on 2-inch wells or larger and can stand high pumping rates and very deep wells. On the other hand, low-flow system valves are used in small diameter piezometers, which lift up to 100 feet of water.     
Support          
Foot valves usually come with surge blocks. A surge block is a tool used to press the body of a valve to remove the residues that may block smooth flow of water within the pump during operation. It also helps the valve expand while being used, thus enabling the presence of increased pressure without causing damage to the valve itself.
600WOG Ball Valves400WOG ball valves

2013年5月16日星期四

How to Install Rigid Plastic Pipes?

Many homes use rigid plastic pipes for their plumbing systems. For the home handyman, installing these pipes is much easier than tackling galvanized or copper pipes. You can pick up all needed supplies at your local hardware store.
Preparation         
1、Measure the distance,or run, in plumber's terms, between the two fittings. You must measure from the face, or open end, of each fitting.         
2、Take measurements inside each fitting to determine how far the pipe goes inside. Measure from the shoulder, the point where the pipe stops inside, to the outside edge of the fitting.         
3、Add the measurements from the two fittings to your measurement from Step 1. Now you have the total length.         
4、Determine the inside diameter of plastic pipe needed. Sizes vary, and you want to match the pipe to the fittings.         
5、Buy rigid plastic pipes, cement and other equipment once you determine the pipe length. For cold-water use, you can purchase PVC pipe. For hot-water pipes, install CPVC pipe.     
Installation         
6、Cut the plastic pipe with a hacksaw, handsaw or power saw. If you're using a handsaw, put the pipe in a miter box to give you a square cut.         
7、Use a utility knife to cut off any burrs on the pipe and clean the end with a piece of cloth.         
8、Check the fit of the pipe and fitting. File down the pipe if it doesn't work. The fit must be snug.         
9、Remove the glossy exterior on the end of the pipe and inside the fitting. Use fine sandpaper for the job.         
10、Brush cement lightly inside the fitting and heavily on the pipe end.         
11、Join the pipe and fitting immediately. Spread the cement by giving the pipe a quarter turn. Wipe excess cement from the outside. Though this is rigid pipe, hold the pipe and fitting in place for one minute.         
12、Wait at least an hour before running water through the pipe. In temperatures below 20 degrees, wait four hours.
india waste pipeDrain pipe