Check Valve
Shanxi Sinomach Co., Ltd. is an industrial international supplier focusing on the design, production and sales of flanges, valves and other pipe fittings.
Since its establishment, the company has always adhered to the business principles of customer-oriented and honest business, with the purpose of meeting customer needs, and providing customers with all-round solutions and high-quality products. This makes our company a long-term partner trusted by many international customers.
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Why choose us?
Our Factory
Factory covers an area of 24,500 m2 and has many professional and technical personnel, annual production capacity more than 20,000 tons/year
Our Service
Whether it is pre-sales consultation, sales, or after-sales, we will answer customers' questions 24 hours a day and provide fast and effective solutions until customers are satisfied.
Our Equipment
Our there are 7 sets of forging equipment and 10 sets of heating equipment,the product quality is safe and reliable, reaching the international standard.
Product Application
Our wind power tower flanges, pressure vessel flanges, and petrochemical flanges are used in water conservancy, oil, natural gas and other pipelines.
Swing check valve
Swing check valves are one of the most basic types. They consist of a disk and a hinge. When the pressure behind the disk builds up, the disk swings open on the hinge and allows liquid to flow through. When the pressure drops, the disk swings closed again.
Piston check valve
Piston check valves, or lift valves, consisting of a disk that is fitted into grooves in the pipe and, sometimes, a spring. When pressure builds up under the disk, it is forced upward, coiling the spring. When the pressure drops, the spring uncoils, and the disk rapidly falls into place to create a seal again.
Ball check valve
Very similar in use to piston check valves, ball check valves consist of a weighted ball that sits in the valve to create a seal. When the pressure builds, the ball is lifted, and liquids can pass through the valve. When the pressure drops, the ball drops back into its spot, recreating a seal.
Butterfly check valve
Butterfly check valves consist of two flaps positioned to revolve around a central hinge. When pressure is applied, these flaps rotate on the hinge to open; when the pressure is relieved, they rotate back.
Dual plate check valve
As the name implies, dual plate check valves, also known as silent check valves, use two plates instead of one to prevent backflow. They consist of two plates mounted on a central hinge and a spring. When pressure is applied, the disks are forced open, and because of the springs, they close as soon as the pressure is reduced, without having to wait for backflow pressure to force them closed. Because pressure is not required to close these valves, they are often used for gases.
Stop check valve
Stop check valves are similar to piston or ball check valves except that they can be controlled. These flow check valves can be forced to open or close regardless of the pressure differential.
Tilting disk check valve
Tilting disk check valves consist of a disk that is mounted to a central pivot point. When pressure is applied, the disk pivots to open, allowing the medium to flow through freely.
Vacuum check valves
Vacuum check valves work in an opposite fashion to most check valves. Instead of opening to allow the flow of liquids or gases, this type of valve is used to suction air or liquids out of a closed system.
Functions of Check Valve
Prevents backflow
The primary function of a check valve is to prevent the backflow of fluids in a piping system. It ensures that the flow of fluid occurs in one direction only, effectively blocking reverse flow. This is especially important in situations where backflow could cause damage, contamination, or interference with the intended flow direction.
Protects equipment and systems
Check valves help safeguard equipment and systems by preventing potential damage caused by reverse flow. They act as a barrier, preventing fluids from flowing back and causing issues such as pump damage, pipe collapse, water hammer, or contamination of sensitive components.
Maintains pressure
Check valves assist in maintaining optimal pressure levels within a system. By allowing fluid to flow in the desired direction and preventing backflow, they help maintain the desired pressure conditions, ensuring efficient operation of pumps, regulators, and other pressure-sensitive equipment.
Enhances system efficiency
Check valves contribute to the overall efficiency of a system. By preventing reverse flow, they eliminate the need for additional pumps or mechanisms to counteract backflow, thereby reducing energy consumption and operational costs.
Minimizes water hammer
Water hammer, characterized by sudden pressure surges or shockwaves in a system, can lead to pipe damage and system failure. Check valves help mitigate water hammer by preventing reverse flow and the subsequent pressure spikes that can occur.
Allows for system isolation and maintenance
Check valves provide a means of isolating sections of a system for maintenance or repairs. By closing off the valve, the flow of fluids can be stopped in a specific direction, allowing for safe and efficient maintenance procedures.
Application of Check Valve
Oil and gas industry
Check valves are extensively used in the oil and gas industry to ensure the smooth and uninterrupted flow of fluids in pipelines. They prevent the backflow of oil, gas, or other fluids, which can lead to contamination, equipment damage, or accidents.
Water treatment and distribution
In water treatment plants and distribution systems, check valves are vital for maintaining the desired flow direction. They prevent the backflow of contaminated water, chemicals, or sewage into the clean water supply, ensuring the safety and quality of drinking water. Check valves are also used in irrigation systems to regulate the flow of water and prevent water hammer, a phenomenon that can damage pipes and equipment.
HVAC systems
Heating, ventilation, and air conditioning (HVAC) systems rely on check valves to control the flow of refrigerants, air, or water. These valves allow the desired flow in one direction while preventing backflow, ensuring efficient operation and preventing damage to HVAC components.
Power generation
Check valves play a critical role in power generation facilities, including thermal power plants, nuclear power plants, and renewable energy systems. They are used to regulate the flow of steam, water, or other fluids in turbines, boilers, and condensers.
Pharmaceutical and food processing
In pharmaceutical and food processing industries, maintaining hygiene and preventing cross-contamination is of utmost importance. Check valves are used to control the flow of fluids, gases, or ingredients in production lines, ensuring that there is no backflow that can compromise product quality or introduce contaminants.
Automotive and aerospace
Check valves are employed in automotive and aerospace applications to control the flow of fuel, oil, or hydraulic fluids. They prevent backflow, ensuring that fluids move in the intended direction and preventing damage to critical components.
Product Parameters
|
Transmission Method |
Connection Type |
Nominal Diameter Dn (mm) |
Pressure Range PN (MPa) |
Closing angle |
Applicable Medium |
Applicable Temperature ℃ |
Material |
|
Hydraulic |
Flange |
300-2400 |
0.25-2.5 |
Quick close 65° Slow closing 15° |
Water, Oil, Air and weak corrosive fluids. |
-10~150 |
Ductile Iron Carbon steel |
|
Standard |
GB/12221、GB/T9113.1、GB/T9115.1、CJ/T154、GB/T13927 |
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Package&Transport
Other Services
Payment terms
30% deposit in advance, 70% balance before shipment.
Min.order
1 pkg.
FAQ
As one of the leading check valve manufacturers and suppliers in China, we warmly welcome you to buy high-grade check valve for sale here from our factory. All our are with high quality and competitive price. For more information, contact us now.
, Extraction Check Valve