OEM Check Valves from a Trusted China Check Valve Factory

Zhuhai Kunjian Technology Co., Ltd. has valves for industries that need one-way flow in specific applications. These check valves prevent reverse flow problems that usually cause severe damage. Such backflow is a threat to the performance of any system. Whether it is for petrochemical, pharmaceutical, or water treatment, we have a solution for all. It is time to battle corrosive media in a chemical line or pulsating flows through our check valves. Explore more about our China check valve factory before you go through the order placement process. We have reasonable prices for all the buyers out there.

Backflow Prevention with Precision Closure Design

We can keep the flow moving in a single direction without much risk of backflow. Reverse flow can cause multiple problems for the pumps or any source. Not only do they damage pumps, but they also cause severe contamination. An entire product batch could face catastrophic aftermaths because of backflow. The check valve models we offer are specially made to tackle this problem. There will be no reverse spin on your multistage centrifugal pumps after you install them. Also, there will be zero risk of cross-contamination in the system. Your process integrity stays intact, and your operators will have peace of mind after that.

Check Valve Types We Manufacture

In our China check valve factory, we manufacture multiple types of check valves. That means different industries can approach us regarding the type of compatibility they want. They can find flanged, swing, and lift check valves mainly. If you want other types like dual-plate, axial flow, or ball check valves,  you can ask our China check valve factory for confirmation. The following section will guide you on how we can meet your requirements regarding additional types.

OEM Check Valves: Customization, MOQ & Sample Process

We have OEM check valves for which we offer custom sizes, materials, thickness, and pressure ratings. Also, you can get application compatibility of valves by sharing your required configurations.

If we talk about MOQ, it depends on factors like standard and custom production. Both types of production have different MOQs for OEM Check valves because of different costs. Further customization has MOQ classifications depending on features. Therefore, buyers can share all the specifications and the application they are choosing the valves for. Then our China check valve factory will share precise MOQs accordingly.

If you want a sample of our OEM Check valves to inspect quality and other elements, we can share it with you.

Materials, Standards & Certifications

Metal check valves are usually available in stainless steel and carbon steel for industrial compatibility. You may find some other metal types also, but these two are more common, affordable, and durable. Similarly, EPDM, NBR, PTFE, and FKM are common materials for internal seats of check valves.

Every China check valve factory needs certifications like ASME B16.5, ASME B16.34, ASME B16.10, and ISO 9001. Also, it needs ANSI, DIN, API 598, API 594, and API 6D certifications. These certifications help valves comply with global standards regarding the dimensions, designs, materials, and internal seat performance.

Available Materials & Grades

Zhuhai Kunjian Technology Co., Ltd. uses different materials depending on each type of check valve.

Lift check valves - We use WCB (cast carbon steel), LCB, CF8 (SS 304), CF8M (SS 316), and specialized duplex steel for the body. In its internal seats, we use PTFE for soft seats and Stellite for hard seats.

Swing check valve- We use ductile Iron, carbon steel, and stainless steel for the body. However, we use NBR and EPDM for internal seats.

Flanged check valve- We use cast steel (WCB), stainless steel (CF8/CF8M), and carbon steel for the body.

Buyers can explore more check valve types and grades from our China check valve factory. Since we have a wide range of valve type options, we also offer a wide range of materials.

International Standards & Certifications

We comply with standards like ISO 45001:2018 and GB/T 19022-2003/ISO 10012:2003. We also follow ANSI, DIN, API 598, API 6D, ASME B16.5, ASME B16.34, and ISO 9001 standards. These certifications make us eligible to manufacture check valves for almost every industrial application.

Applications We Serve

This China check valve factory supplies check valves that prevent backflow in pumping and high-temp pipelines. These applications require these kinds of valves for the safety of the pumping source. They are the best choice because they prevent backflow that could damage pumps.

Boiler return systems need our valves to protect the system. Check valves can halt the backflow to prevent any damage inside the boiler return line and system.

When it comes to handling corrosive media, SS check valves are the best. Their anti-corrosion nature prevents such damage inside the valves. Even the seat material is anti-corrosive, which further protects the internal structure of the valve.

For applications where maintaining hygiene and sterility are core objectives, choose check valves. They are among the most compatible types to prevent backflow in the system.

Ensuring unidirectional flow in high-head pumping stations becomes possible through them.

They are suitable for oil and gas, HVAC, power generation, and marine applications.

Energy-Efficient Flow Path Design for Lower Pumping Costs

Every valve we make has an energy-efficient flow path design that reduces turbulence. Then there is less load on pumps for maintaining full system flow. The pumping cost may also drop because of that. Preventing backflow and siphoning in the pipelines, especially in critical systems, becomes possible. The credit goes to our check valves that excellently match the requirements of each system. Installing them in your desired system will protect it from damage, which will lead to lower repair costs.

Quality Testing & Inspection at Our China Check Valve Factory

At our China check valve factory, we perform multiple tests to inspect the shell’s strength, interior design, flow path, and seat performance. Each valve goes through an inspection process to qualify for global standards. We perform pressure tests to measure the strength of the shell against the risk of collapse and leakage. It also includes cycling endurance of valves to measure the durability and functionality. Buyers can get documentation regarding inspection of each batch from us.

Frequently Asked Questions

What Materials are Your Check Valves Available in?

Our lift check valves are available in WCB (cast carbon steel) and LCB (low-temperature carbon steel). We also have austenitic stainless steel like CF8 (SS 304), CF8M (SS 316), and specialized duplex steels. We use PTFE and Stellite seating in these check valves depending on application type.

Our swing check valves are available in ductile Iron, carbon steel, and stainless steel. In their internal seats, we use NBR and EPDM materials. In our flanged valves, we use cast steel (WCB), stainless steel (CF8/CF8M), and carbon steel for the body.

What International Standards Do Your Check Valves Comply with (ANSI, DIN, API, GB)?

Our check valves comply with ISO 45001:2018 and GB/T 19022-2003/ISO 10012:2003. They also comply with ANSI, DIN, API 598, API 6D, ASME B16.5, ASME B16.34, and ISO 9001 standards. Buyers can ask our China check valve factory for documentation to back these standards’ compliance.

What is Your MOQ for OEM Check Valves and Custom Orders?

It all depends on the type of production you choose. Standard and custom check valves have different MOQs. Also, further customization can affect MOQ selection. So, what we do is take your requirements, process them, and then share our MOQs with you.

Do You Provide Design Drawings or Samples Before Mass Production?

You can contact us with your details, and our team can confirm those details. We can share samples along with other information depending on conditions. What you can do is share your specifications with us, and we will get back to you with everything you need.

What Quality Inspections and Certificates Do You Provide (Material Test Certificate, Third-Party Inspection)?

We can provide ISO and GB/T certifications along with test reports. Since we conduct multiple quality tests on these valves, you can get detailed information from us.

What is Your Typical Lead Time for Bulk/OEM Orders?

Our lead time varies depending on the order size and production type. Standard and custom productions have different lead times. However, we do our best to keep it at a standard level, so buyers can receive orders on time.

Can You Manufacture Check Valves to Our Custom Specifications (Size, Material, Connection Type)?

Yes, we can manufacture check valves to your custom specifications. You can get custom sizes, materials, pressure ratings, connection types, and valve thicknesses. We have a wide range of customization options for buyers from different industries.