Small Check Valve

The Small Check Valve Manufacturer!

Zhuji Juntai Auto Spare Parts Co.,Ltd. was established in 2011 and located in Zhuji City, Zhejiang Province, China. Our factory has professional technicians team and excellent sales team, which can help us to provide our clients good quality and perfect service.

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Why choose us

Excellent Team

Our factory has professional technicians team and excellent sales team, which can help us to provide our clients good quality and perfect service.

Quality Assurance

ISO 9000 certificate of conformity of quality management system certification; certificate of utility model patent; SGS gold plus supplier assessment certificate.

Reputation

A company with a positive reputation is more likely to attract customers. Reputation is built through consistent quality service or products, good customer relations, and reliability.

Production Market

Our products are exported to over 100 countries in Southeast Asia, Europe, Africa, America, and other regions, as well as domestic automotive after-sales markets and repair shops. The annual transaction volume exceeds 20 million yuan.

Type	Small Check Valve
Place of Origin	Zhejiang, China
Purpose	For replace/repair
OE NO.	MC837932 MC-837932
Application	Other Devices
Single Box Gross Weight	0.165 KGS
Single Box Net Weight	0.156 KGS
Single Box Size	5.4 CM4.2 CM7.5 CM

Advantages of Small Check Valve

Backflow Prevention

Eliminates reverse flow that could cause contamination or damage.

System Longevity

Reduces wear on pumps, filters, and downstream equipment.

Low Maintenance

Minimal moving parts mean fewer failures and lower servicing costs.

Space Efficiency

Compact designs fit into tight installation spaces.

Customization

Size, opening pressure, and materials can be tailored to your project.

Common Check Valve Types

Ball Check Valve:

Spherical check valves use a free-floating sphere as the closing element, which is pushed back against the seat by the reverse flow of fluid, automatically closing the valve. This design is simple, suitable for smaller pipe diameters and low pressure systems, and is easier to install. However, because the sphere is susceptible to dirt, special attention should be paid to cleaning when in use.

Swing Check Valve:

Uses a swinging disc inside the valve body. As fluid flows in the forward direction, the disc opens, allowing fluid to pass through. When the fluid direction reverses, the disc swings back to the closed position, preventing reverse flow. Suitable for applications requiring minimal pressure drop, This design is simple in construction and widely used, and is especially effective in systems with large pipe diameters. For high flow applications, swing check valves are very effective, but require sufficient space for free flap swing.

Lift Check Valve:

Features a vertically moving valve disc. When fluid flows in the specified direction, the disc lifts to allow fluid to pass through. In reverse flow, the disc quickly closes. Suitable for high-pressure differential systems, such as in petroleum and natural gas pipelines. Also used in boiler feedwater systems to prevent backflow.

Diaphragm Check Valve:

Utilizes a flexible diaphragm's response to fluid pressure. When fluid flows in the predetermined direction, the diaphragm bends, allowing fluid to pass through. In reverse flow, the diaphragm returns to its original state, preventing backflow. Suitable for applications with variable flow rates, such as preventing corrosive media backflow in the chemical industry and preventing cross-contamination in food processing. Also used in water treatment systems.

Tilting Disc Check Valve:

Designed with a tilting disc that easily opens during forward flow and quickly closes during reverse flow. It has a high response speed，Suitable for high-speed fluid and high-pressure differential environments, such as in hydroelectric power stations and commonly used in the chemical and petroleum industries.

Wafer Check Valve:

Lightweight design suitable for limited installation space. Typically installed on flange connections, it has a simple structure and lower pressure drop. The valve flap adopts a two-piece symmetrical design, which can effectively prevent backflow. It is very suitable for small and medium-sized pipelines and some applications that need to save space. Commonly used in limited installation spaces, such as air conditioning systems and some light industrial applications. Suitable for situations that require an economically compact design.

Check valve Standards

API Standards:

API Spec 6D, API Std 594

ASME Standards:

ASME B16.34

AWWA Standards:

AWWA C508, AWWA C510

BSI Standards:

BS 1868, BS 1873, BS 2080, BS 5152, BS 5153, BS 5154, BS 5160, BS 5352

MSS Standards:

MSS SP-42, MSS SP-61, MSS SP-71, MSS SP-80, MSS SP-84

Packing And Shipping

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FAQ

Q: If accessories are urgently needed, can they be supplied quickly?

A: We have an emergency parts supply mechanism and will arrange shipment as soon as possible to meet your needs. Please consult customer service for specific time.

Q: How do you control product quality?

A: 1) Each production batch will have a task list and a flow list.
2) Each batch of products will go through the first inspection, random inspection and final inspection, three processes to control the quality.

Q: Can I get samples?

A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost. If we don't have the goods in stock, we can deal with a small batch first. If you feel that our products meet your requirements, then you can cooperate with us for large orders.

Q: How does the factory control product quality?

A: Our factory has a strict quality control system, and every link from raw material procurement to finished product delivery undergoes strict inspection.

Q: Does the factory accept visits?

A: Yes, we welcome customers to visit our factory, but please make an appointment in advance so that we can prepare for the reception.

Q: Can small check valves be used in hot water systems?

A: Yes, but the material must be heat-resistant, such as EPDM or high-grade silicone.

Q: How do I know when a check valve needs replacement?

A: Signs include reduced flow, visible wear, leakage, or failure to prevent backflow.

Q: How do you calculate the cracking pressure of a check valve?

A: The cracking pressure of a check valve is determined by the valve's design, spring tension (if applicable), and the force required to overcome friction. It can be calculated using the manufacturer's specifications or testing equipment.

Q: Can check valves be used for backflow prevention in a sewage system?

A: Yes, check valves are commonly used in sewage systems to prevent the reverse flow of wastewater, which can lead to contamination and system damage.

Q: What materials are commonly used for check valve construction?

A: Materials commonly used for check valve construction include stainless steel, brass, bronze, cast iron, PVC, and various elastomers. The choice of material depends on the fluid or gas being handled and the operating conditions.

Find professional small check valve manufacturers and suppliers in China here! We warmly welcome you to buy bulk small check valve in stock here from our factory. Contact us for quotation.