China Check Valve Manufacturers Suppliers Factory

What Is Check Valve?

A check valve refers to a type of valve in which the opening and closing member is a circular valve disc, and it operates by means of its own weight and the pressure of the medium to block the backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve or isolation valve. The movement mode of the valve disc is divided into the lift type and the swing type. The lift check valve is similar in structure to the globe valve, except that it lacks the valve stem that drives the valve disc. The medium enters from the inlet end (the swing check valve has a slanted valve disc that can rotate around an axis, and its working principle is similar to that of the lift check valve. The check valve is commonly used as the foot valve of a water pumping device, which can prevent the backflow of water. When the check valve is used in combination with the globe valve, it can play the role of safe isolation.

Brass Swing Check Valve Female
Item Number: DY503
1.Nominal pressure:1.6Mpa
2.Working medium: Water, Oil
3.Working temperature:-20°C≤ t ≤ 180°C
4.Thread conform to ISO 228
view more
Brass Flange Check No Return Valve
Product name: Brass Flange Check Valve
Material: Brass ( Hpb59-1 / CW617)
Size: DN40-DN100
Usage: Water
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag + Carton
view more
Brass Horizontal Swing Check Valve
Product name: Brass Horizontal Check Valve
Material: Brass ( Hpb59-1 / CW617)
Size: DN15-DN50
Usage: Water
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag + Carton
view more
Brass Union Check Valve Connect To Meter
Product name: Brass Union Check Valve Pre/post Meter
Material: Brass ( Hpb59-1 / CW617)
Size: DN15-DN50
Usage: Water
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag + Carton
view more
Wholesale High Quality Brass Vertical Check Valve
Product name: Brass Vertical Check Valve
Material: Brass ( Hpb59-1 / CW617)
Size: DN15-DN50
Usage: Water
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag + Carton
view more
Brass One-Way Check Valve With Filter Mesh
Product name: Brass One-Way Check Valve with Water Pressure Filter Mesh
Material: Brass ( Hpb59-1 / CW617)
Size: DN15-DN50
Usage: Water
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag +...
view more
Brass Check Valve Dedicated For Water Heater
Product name: Brass Check Valve Dedicated for Water Heater
Material: Brass ( Hpb59-1 / CW617)
Size: DN15
Usage: Water
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag + Carton
view more
Brass Magnetic Lockable Check Gate Valve
Product name: Brass Magnetic Lockable Check Gate / Globe Valve
Material: Brass ( Hpb59-1 / CW617)
Size: 1/2"-2"
Usage: Watering
Support：OEM / ODM
Sample: Support
Packing: Export OPP Bag + Carton
view more
PPR Vertical Check Valve
Working medium: water
Docking process:heat fusion connection
Working temperature: 0°C≤ t ≤ 80°C
The pipeline complies with ISO45001, ISO14001, and ISO9001 standards
view more
Brass Check Gate Valve
Working medium: water
Docking process:BSP/NPT female thread connection
Working temperature: 0°C≤ t ≤ 80°C
The pipeline complies with ISO45001, ISO14001, and ISO9001 standards
view more
Brass Vertical Check Valve
Working medium: water
Docking process:BSP/NPT female thread connection
Working temperature: 0°C≤ t ≤ 80°C
The pipeline complies with ISO45001, ISO14001, and ISO9001 standards
view more

Your Professional Check Valve Supplier！

Zhejiang Dunyun Industrial Co., Ltd. is located at No. 1 Dunyun Road, Modern Environmental Protection Equipment Industrial Park, Zhuji City, the hometown of Xi Shi, in the Yangtze River Delta Economic Circle.We mainly produce various copper valves such as "Dunyun" brand water supply systems, central air conditioning systems, heating systems, gas systems, special ball valves, gate valves, globe valves, temperature control valves, gas valves, exhaust valves, filters, underfloor heating water collectors, as well as new aluminum-plastic composite pipes, and other plumbing accessories.

Why Choose Us

Rich Experience
As we are Actuated Valve Specialists with over 20+ years of experience in valve automation, we have the tools, products, and experience to make sure that your automated valve is durable and has a high life cycle.

Quality Control
All inspections are handled by qualified, experienced personnel aligned with the specifications of each project to fully satisfy our customers and surpass their expectations with a high degree of environmental consciousness to the total satisfaction of our customers.

Our Certifications
We have passed ISO9001 quality management system certification，as well as various product hygiene licenses.

Product Specification

We offers the following product specifications：

Material	‎Brass
Item dimensions L x W x H	‎0.39 x 0.39 x 0.39 inches
Exterior Finish	‎Brass
Inlet Connection Size	‎1 Inches
Inlet Connection Type	‎Thread
Outlet Connection Type	‎BSPT
Maximum Operating Pressure	‎232 Pound per Square Inch
Number of Ports	‎2
Specification Met	‎CSA, ULC
UPC	‎738586732397
Item Weight	‎9.2 ounces
Product Dimensions	‎0.39 x 0.39 x 0.39 inches
Item Package Quantity	‎1
Batteries Included?	‎No
Batteries Required?	‎No

Advantages of Check Valve

01/

System Protection. By making sure fluids and gases only flow in one direction, check valves prevent backflow that could otherwise result in system damage.

02/

Safety Assurance. Certain industrial processes involve the use of hazardous materials. Check valves enhance overall safety by preventing the unwanted movement of dangerous substances in the wrong direction.

03/

Operational Efficiency. Check valves contribute to system efficiency by maintaining the appropriate flow direction. This also helps to optimize performance and reduce energy consumption.

04/

Reliability. Check valves ensure the reliable operation of various process systems, providing a simple yet effective way of maintaining the proper flow of gases and fluids.

Types of Check Valve

Ball check valves: These valves use a ball that sits on a seat to allow fluid to flow in one direction but prevent backflow when the fluid flows in the opposite direction.

Inline check valves (Globe-Style Sliding Disc Check Valve): These valves are installed within the piping system and use a spring-loaded disc to allow fluid to flow in one direction and prevent backflow when fluid flows in the opposite direction.

Swing check valves (Butterfly Check Valve) : These valves use a swinging disc to allow fluid to flow in one direction and prevent backflow when fluid flows in the opposite direction.

Wafer check valves: These valves are installed between flanges and use a spring-loaded disc to allow fluid to flow in one direction and prevent backflow when fluid flows in the opposite direction.

Brass Swing Check Valve Female suppliers

Application

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. Check valves are commonly found in oil refineries, petrochemical plants, and natural gas distribution systems.

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. Check valves are commonly used in heat exchangers, chillers, and air handling units.

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. By preventing backflow, check valves help maintain system efficiency, prevent damage, and ensure the safety of personnel.

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. These valves are commonly found in processing equipment, filling machines, and packaging lines.

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. Check valves are commonly used in fuel systems, braking systems, and hydraulic systems in vehicles and aircraft.

Certifications

Package & Delivery

Package: Standard export package or Custom

Delivery: By air express, by sea

p202507081717564a719.jpg (800×730)

FAQ

Q: What is a check valve used for?

A: A check valve is used to allow fluid or gas to flow in only one direction, preventing reverse flow and its associated problems. Common applications include preventing backflow in water systems to protect pumps and water quality, maintaining pressure in irrigation systems, and preventing water from siphoning out of air mattresses or fish tanks. They also protect equipment by preventing water hammer and serve in hydraulic systems to block fluid from flowing back into accumulators.

Q: Where are check valves needed?

A: In piping systems, it is sometimes necessary to install check valves at high locations. This usually occurs in vertical pipes or in high sections of pipes. In this case, the function of the check valve is to prevent the medium from flowing back due to gravity.

Q: What are the rules for check valves?

A: All check valves require pressure from the fluid velocity to open them and maintain a stable position. The minimum pressure to open a check valve is called the cracking pressure, but the differential pressure should be at least two times that to fully open the valve.

Q: What is the minimum opening pressure for a check valve?

A: The minimum upstream pressure required to operate the valve is called the cracking pressure, generally between 1 and 5 psi. Check valves are designed specifically with this number in mind.

Q: Are you manufacturer or trading company?

A: We are manufacturer.

Q: What's your best delivery time?

A: Within 15-30 days.

Q: What is the quality control of your product?

A: Follow strictly quality control measures for implementation,

Q: Will your company provide free sample?

A: It depends on which sort of item you want to get. Some can be provided free of charge, however, the client shall assume the shipping fees himself.

Q: Is OEM open to clients?

A: Yes, we can provide both OEM and ODM service.

Q: What is the payment of sample?

A: T/T and Alipay both acceptable.

Q: What is your packing?

A: Yes, our packaging is genuine original packaging. Of course, we can also provide neutral packaging or according to your requirements

Q: What is your sample policy?

A: If we have stock, we can provide samples, but the customer must pay the sample fee and express fee Question

Q: Have you tested all your goods before shipment?

A: Yes, we will conduct 100% test before delivery, and we will send detailed photos of parts for your approval Question .

Q: How can you maintain a long-term good relationship with our business?

A: We maintain good quality and competitive prices to ensure the interests of our customers.

We're professional check valve manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to wholesale cheap check valve from our factory.

Brass Swing Check Valve Female, check valve