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Your Leading Zhuji Fengfan Piping Co.,Ltd Supplier
IFAN factory started in 1993. And IFAN has workshop 120000 ㎡ with 610 staff. IFAN can design and produce all plumbing pipe and fitting include PPR PVC CPVC PPSU HDPE PEXA PEXB PERT pipe and fitting, brass fitting, brass ball valve, heating system, gas system, sanitary faucets and hose. In the past 30 Years, IFAN has never forgotten his mission-To protect health and safety. And IFAN factory use best materials to produce high quality pipe and fittings with automatic production line and high tech quality control machines. The most important, IFAN can guarantee that all pipes and fittings manufactured by IFAN are qualified.
Why Choose Us?
Quality control
We have a professional quality inspection team, and our quality inspection team will carry out strict quality inspection on the products before all products are shipped to ensure the quality of the products.
OEM & ODM Support
We have 56 professional engineers. They can design and produce all plumbing pipe and fitting.
Competitive price
We have a professional purchasing team and costing team,trying to reduce costs and profits,and provide you with a good price.
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You can contact us to inquire about pre-sales, sales, and after-sales services, and we will give you a very satisfactory.We are at your service online 24 hours a day.
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A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure.
Benefits of Valves
Control
Valves help to control and regulate the flow of fluids and gases through pipes, ensuring that they are distributed evenly and efficiently.
Safety
Valves can shut off or isolate certain parts of a system in case of emergencies or maintenance, preventing accidents or damage.
Efficiency
By regulating the flow of fluids and gases, valves can help to optimize the efficiency of many industrial processes, reducing waste and improving overall productivity.
Reliability
High-quality valves can operate for long periods without requiring maintenance, providing a reliable and consistent performance throughout their lifespan.
Flexibility
There are many different types of valves available, offering a wide range of options for controlling different types of fluids and gases in various applications.
Sustainability
By optimizing the flow of fluids and gases and reducing waste, valves can help to minimize the environmental impact of industrial processes and promote sustainable practices.
Types of Valves
- Ball: In a ball valve, a hollowed-out sphere (the ball) sits tightly inside a pipe, completely blocking the fluid flow. When you turn the handle, it makes the ball swivel through ninety degrees, allowing the fluid to flow through the middle of it.
- Butterfly: A butterfly valve is a disk that sits in the middle of a pipe and swivels sideways (to admit fluid) or upright (to block the flow completely).
- Cock or plug: In a cock or plug valve, the flow is blocked by a cone-shaped plug that moves aside when you turn a wheel or handle.
- Gate or sluice: Gate valves open and close pipes by lowering metal gates across them. Most valves of this kind are designed to be either fully open or fully closed and may not function properly when they are only part-way open. Water supply pipes use valves like this.
- Globe: Water faucets (taps) are examples of globe valves. When you turn the handle, you screw a valve up or down and this allows pressurized water to flow up through a pipe and out through the spout below. Unlike a gate or sluice, a valve like this can be set to allow more or less fluid through it.
- Needle: A needle valve uses a long, sliding needle to regulate fluid flow precisely in machines like car engine carburetors and central-heating systems.
- Poppet: The valves in car engine cylinders are poppets. This type of valve is like a lid sitting on top of a pipe. Every so often, the lid lifts up to release or admit liquid or gas.
- Spool: Spool valves regulate the flow of fluid in hydraulic systems. Valves like this slide back and forward to make fluid flow in either one direction or another around a circuit of pipes.
Material of Valve
A non-ferrous metal, very lightweight, approximately one-third the weight of steel. Aluminum exhibits excellent atmospheric corrosion resistance, but can be very reactive with other metals. In valves, aluminum is mainly used as for exterior components such as a hand wheels or identification tags.
Among the most important properties of wrought copper materials is their thermal and electrical conductivity, corrosion resistance, wear resistance, and ductility. Wrought copper performs well in high temperature applications and is easily joined by soldering or brazing. Wrought copper is generally only used for fittings.
One of the first alloys developed in the Bronze Age is generally accepted as the industry standard for pressure rated bronze valves and fittings. Bronze has a higher strength than pure copper, is easily cast, has improved machinability, and is very easily joined by soldering or brazing. Bronze is very resistant to pitting corrosion, with general resistance to a wide range of chemicals.
Has the ductility of copper but much more strength. Silicon bronze has equal or greater corrosion resistance to that of copper. Commonly used as a stem material in pressure-rated valves, silicon bronze has greater resistance to stress corrosion cracking than common brasses.
The most widely accepted disc material used in butterfly valves, aluminum bronze is heat treatable and has the strength of steel. Formation of an aluminum oxide layer on exposed surfaces makes this metal very corrosion resistant. Not recommended for high pH wet systems.
Generally good corrosion resistance. Susceptible to de-zincification in specific applications; excellent machinability. Primary uses for wrought brass are for ball valve stems and balls, and iron valve stems. A forging grade of brass is used in commercial ball valve bodies and end pieces.
An alloy of iron, carbon and silicon; easily cast; good pressure tightness in the as-cast condition. Grey iron has excellent dampening properties and is easily machined. It is the standard material for bodies and bonnets of Class 125 iron body valves. Grey iron has corrosion resistance that is improved over steel in certain environments.
Has composition similar to gray iron. Special treatment modifies metallurgical structure, which yields higher mechanical properties; some grades are heat treated to improve ductility. Ductile iron has the strength properties of steel using similar casting techniques to that of grey iron and is used for class 250 (as well as class 125 in larger sizes).
Very good mechanical properties; good resistance to stress corrosion and sulfides. Carbon steel has high and low temperature strength, is very tough and has excellent fatigue strength. Mainly used in gate, globe, and check valves for applications up to 454ºC, and in one-, two-, and three-piece ball valves. Can be forged or cast, with forgings being superior especially for larges sizes in very high classes.
Improved corrosion resistance over gray and ductile iron. Higher temperature as well as corrosion resistance and mechanical properties. Very resistant to oxidising atmospheres.
Nickel coatings have received wide acceptance for use in chemical processing. These coatings have very high tensile strength, 50 to 225 ksi. To some extent, the hardness of a material is indicative of its resistance to abrasion and wear characteristics. Nickel plating is widely specified as a disc coating for butterfly valves. For industrial and petroleum ball valves, superior electroless nickel plating (ENP) is used in carbon steel valve components and is in fact superior to stainless steel in hardness but with similar corrosion properties.
An alloy of iron, carbon, and chromium. This stainless is normally magnetic due to its martensitic structure and iron-content. 400 series stainless steel is resistant to high temperature oxidation and has improved physical and mechanical properties over carbon steel. Most 400 series stainless steels are heat-treatable. The most common applications in valves are, for stem material in butterfly valves, and trim components such as seat, backseat bushings, discs, wedges etc. in cast steel gate, globe and check valves.
An alloy of iron, carbon, nickel, and chromium. A non-magnetic stainless steel with more ductility than 400 series SS. Austenitic in structure, 316 stainless steel has very good corrosion resistance to a wide range of environments, is not susceptible to stress corrosion cracking (however it is not suitable for higher levels of H2S typically found in wellhead applications) and is not affected by heat treatment. Very commonly used in valve body and/or trim material.
Is a martensitic precipitation/age hardened stainless steel offering high strength and hardness. 17.4 PH withstands corrosive attack better than any of the 400 series stainless steels and in most conditions its corrosion resistance closely approaches that of 300 series stainless steel. 17.4 PH is primarily used as a stem material for butterfly and ball valves as well as any valve application requiring a superior strength stem.
This alloy has higher amounts of nickel and chromium than 300 series stainless steel and with the addition of columbium, this alloy retards stress corrosion cracking and has improved resistance to sulfuric acid. Alloy 20 is widely used in all phases of chemical processing.
Is a nickel-copper alloy used primarily as interior trim on all types of valves. One of the most specified materials for corrosion resistance to sea and salt water. Monel is also very resistant to strong caustic solutions.
Cobalt base alloy, one of the best all-purpose hard facing alloys. Very resistant to heat, abrasion, corrosion, impact, galling, oxidation, thermal shock and erosion. Stellite takes a high polish and is used in steel valve seat rings. Normally applied with transfer plasma-arc; Stellite hardness is not affected by heat treatment.
A high nickel-chromium molybdenum alloy, which has outstanding resistance to a wide variety of chemical process environments including strong oxidisers such as wet chlorine, chlorine gas, and ferric chloride. Hastelloy C is also resistant to nitric, hydrochloric, and sulfuric acids at moderate temperatures.
Components of Valve
- Body: It is the part that contains the materials that allow the passage of the fluid and the sealing process takes place. The body guides and connects the fluid within the pipe.
- Cover: It is the part that provides the opening and closing process by being attached to the body. It facilitates the assembly of many parts attached to the body.
- Opening and Closing Spindle: It transmits the opening and closing process applied to the valve from outside to the closing part.
- On-Off Shaft Seal: It prevents leakage between the parts inside the valve.
- Closing Organ: Affects the flow in the valve.
- Actuator: It transmits the movement applied to the closing body, thus automatic opening or closing settings are made.
Application of Valves
Valves have various applications in industries, including:
Mixing
Valves mix two or more fluids, leading to the creation of specific chemical compositions.
Pressure regulation
Valves control the pressure of fluids or gases in a pipeline.
Metering
Valves can measure fluid or gas flow while allowing precise dosing in chemical and pharmaceutical industries.
Waste treatment
Valves direct or control the flow of liquid wastes in treatment plants.
Control flow
Valves are used to regulate the flow of fluids or gases, preventing overflows or shortages.
Prevent backflow
Valves prevent the backflow of fluids, which could contaminate equipment or cause accidents.
Temperature control
Valves can regulate the temperature of pressure vessels, boilers, and other equipment.
Directional control
Valves direct fluids or gases in specific directions, depending on the requirements of the equipment.
Safety relief
Valves will release liquids or gases under pressure when necessary to prevent equipment damage or injury.
Isolation
Valves are used to isolate sections of pipelines and equipment for maintenance or repairs.
How to Maintain Valve
Cleaning your valves is one of the simplest methods to extend their life. Cleaning cycles vary per person, but it’s a good idea to clean your valves at least once a year. You should clean your surroundings more occasionally if it is dirty or dusty. Cleaning the valve casing using a towel or wire brush is the simplest method. It will last longer if you keep it clean because it will prevent accumulation on the valve stem and other working parts.
Your valves should be examined and checked on a regular basis. Valves that are subjected to significant stress (temps or force) should be monitored more frequently than others. When you push a valve to its limit, it will fail faster.
Ascertain that the enclosure is suitably ventilated. Make sure all bolts, nuts, and other hardware are securely fastened. To make sure the valves aren’t jammed, open and close them as often as feasible. If you discover any leaks, you should fix them right away.
Fugitive secretions are frequently caused by leaking valves. Mineral accumulation or corrosion on the casing can immediately reveal leaks. To confirm that the valve position indicator is producing an accurate signal, test valves that are generally static.
Mineralization, tarnish, and wearing will corrode the parts inside your valves over time. Machinery shutdowns are an ideal time to inspect your valves. Disassemble them, clean the inside, and restore any damaged or broken parts. There are a number of rubber and plastic parts that may need to be changed in conjunction with metal elements. If you find any brittle or rotting pieces, replace them as needed.
Oiling is among the most Ignored but cheap parts of valve maintenance. Lubrication on a Repetitive Basis can also help valve seal, prolonging their service life. The key is to turn the valve to allow the lubricant to enter the valve cavity.
This will Lengthen the valve’S life by reducing abrasion. Valves Maintenance requires you to select the appropriate lubrication for your specific valves, Relying on the setting. Do Not Just Get the First Thing You Seize. Lubricants come in Various attributes.
Water-impenetrable, Lithium-based, high temps, Carbon dioxide resistance, and other attributes are all a possibility. For Instance, in stick-type lubes, clay or similar solid-based thickening agents may be added, which can solidify and leave solids in the valve, causing it to the clutch.
In addition to lubing, you may need to protect your valves from temp changes in the air, particularly if the pipes are on the exterior side. If this is the case, adding and maintaining protective insulations to your valve maintenance routine may be needed.
Valve Opening Methods Explained
While many valves accomplish similar goals, how they do so mechanically can vary.
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.Most valves fit into one of three categories:
- Multi-Turn valves: Think of these valves like a screw or piston. You crank the handle and the plug, plate, membrane, or other controlling obstruction moves into the path of the pipe blocking access. Depending on the valve, these can have higher or lower differentials allowing you to open or close them at various speeds.
- Quarter turn valves: Quarter-turn valves offer a full range of motion in a 90-degree turn of the handle. This makes them ideal for situations where precision isn’t as important as rapid action and easy opening or closing.On top of the mechanical motion involved with a valve, also consider the method of actuation. In most cases, valves fall into one of three categories:
- Manual Valves: Typically adjusted by hand, these valves use handwheels, hand levels, gear wheels, or chains to actuate.
- Actuated Valves: Often connected to electric motors, air or pneumatic systems, hydraulic systems, or solenoids, these valves allow remote control and automation for high-precision or large-scale applications.
- Automatic Valves: Some valves activate when a specific flow condition is met. Examples include check valves closing during backflow or pressure release valves activating when an over-pressure condition is detected.
How It Works: Valves
Valves are mechanical devices that regulate the flow of fluids, gases, slurries, or other materials through pipes or tubes. They are commonly used in a variety of industries, including oil and gas, water treatment, chemical processing, and power generation.
Valves work by opening or closing a pathway within a pipeline or vessel, allowing or restricting the flow of material. Valves can be operated manually, mechanically, or electronically, and they come in a wide variety of designs to suit different applications.
The most common types of valves include ball valves, gate valves, globe valves, check valves, and butterfly valves. Each type of valve has its unique design, and the operating mechanism varies accordingly.
For example, a ball valve has a sphere-shaped disc that rotates within a housing, allowing or restricting flow as the ball is turned. A gate valve has a gate that moves up and down between two seats, creating a seal to stop the flow of material. A globe valve works similarly to a gate valve, but it has a more contoured disc that allows for greater flow control.
In addition to controlling flow, valves can also be used to regulate pressure, temperature, and other parameters within a pipeline or process system. They play a crucial role in ensuring the safe and efficient operation of industrial systems.
Certifications
Our Factory
IFAN factory started in 1993. And IFAN has workshop 120000 ㎡ with 610 staff. IFAN can design and produce all plumbing pipe and fitting include PPR PVC CPVC PPSU HDPE PEXA PEXB PERT pipe and fitting, brass fitting, brass ball valve, heating system, gas system, sanitary faucets and hose.
FAQ
Q: What is the function of a valve?
Regulating flow and pressure within a piping system. Controlling the direction of flow within a piping system. Throttling flow rates within a piping system. Improving safety through relieving pressure or vacuum in a piping system.
Q: What is a valve example?
Q: How do valves work in an engine?
Q: What are valves on a car?
Q: Where are valves commonly used?
Q: Where do valves go in an engine?
Engine valves are mechanically opened and closed, to admit air or expel exhaust gasses, into the engine cylinder(s); the valves are located in the head casting of the engine. The area where the valve seals against the head is called the valve seat.
Q: How do you identify valves?
Valve tags are preprinted with numbers and standard abbreviations to relay critical pipe content, valve identification, or operation information at the point of use. Valve tags include manufacturer information, valve seat, model number, trim, and body material.
Q: Are valves located in the head?
Q: Where do replacement valves come from?
Q: How do I know if my valves are open?
Q: What does a open valve look like?
Q: Which valve is the exhaust?
Q: How do I know which valve is intake and exhaust?
Q: How do you know if a valve needs to be replaced?
Q: Can you replace valve seals without removing the head?
Q: Which valve is normally open?
A normally open solenoid valve controls the flow of gas or liquid. This valve differs in the way that the flow is started or stopped. When a normally open solenoid valve is not powered, the plunger is down, which means that a flow is allowed through the valve.
Q: What happens when a valve fails open?
Q: What type of valve is most reliable?
Q: What is the most common type of valve?
Q: Should you open a valve left or right?
As one of the leading valves manufacturers and suppliers in China, we warmly welcome you to buy or wholesale bulk cheap valves from our factory. All our products are with high quality and competitive price. Contact us for pricelist.
