China Customized Check Valve Manufacturers - Wholesale Check Valve Made in China

Your Leading Check Valve Supplier

Taizhou Chengsheng Machinery Co., Ltd. is a manufacturer specialized in the development and production of fluid equipment components for general industrial applications. Our main products include hose swivel, shut off valve, check valve, oil sight glass, and pipe fitting, which are widely used in oil and gas storage and transportation, industrial pipelines, water pump systems, and hazardous chemical transportation. We support both standardized bulk supply and customized solutions to meet different system requirements.

Foot Valve
A Foot valve is a specialized form of check valve installed at the absolute bottom of a suction pipe to maintain pump prime and prevent fluid from draining back into the source tank. Our Foot valve
Triangle Flange Check Valve
In heavy-duty piping systems prone to intense vibration and high mechanical stress, the Triangle flange check valve is the ultimate choice for secure, bolt-on backflow prevention. We design this
New Style Check Valve
The New style check valve represents the next generation of fluid flow control, featuring a re-engineered internal structure that optimizes flow dynamics and reduces turbulence. Unlike traditional
In-line Check Valve
Our In-line check valve is a highly efficient, spring-loaded safety component engineered to prevent fluid backflow within pressurized pipeline systems. Designed to fit directly into compact piping
Pipeline Check Valve
Thread specification: 2”, 1.5”. Thread type: NPT/G/BSPT. Material: Cast Iron. Seal material: Nitrile Rubber/Fluororubber
New Type Check Valve
Thread specification: 1”, 3/4”. Thread type: NPT/G/BSPT. Material: Copper. Seal material: Nitrile Rubber/Fluororubber
Triangle Check Valve
Connection method: Flange Connection. Hole distance: 68mm. Material: Copper
Foot Pedal Hydraulic Valve
Thread specification: 4”, 3”, 2.5”, 2”, 1.5”, 1.25”, 1”. Thread type: G/BSPT/NPT. Material: Copper. Seal material: Nitrile Rubber/Fluororubber

Why Choose Us

Quality Assurance

Chengsheng Machinery operates under a standardized quality management system with full-process inspection covering raw materials, machining, assembly, and final testing.

Advanced Equipment

The company is equipped with CNC lathes, punching machines, drilling machines, and supporting machining equipment, forming an integrated production process from material processing to precision machining.

Broad Market

Our products are supplied to customers across multiple domestic regions and overseas markets, with exports to Europe, North America, and Southeast Asia, serving distributors, wholesalers, and industrial system integrators.

Types of Check Valve

01/

Pipeline Check Valve
The Pipeline check valve, also known as an angle valve, is installed on the oil delivery pipeline of the submersible oil pump to prevent medium backflow and reduce the impact of the medium on the submersible oil pump.

02/

New Type Check Valve
The New type check valve is mainly used on various fully automatic self-priming fuel pumps and can also be used independently. It can prevent the oil pump from drawing air when starting, prevent liquid backflow when the pump stops, and has a filter screen to clean the oil.

03/

Triangle Check Valve
The Triangle check valve for fuel dispensers is installed between the corrugated pipe at the bottom of the fuel dispenser and the flange. It plays a role in isolation and enhanced sealing between the oil delivery pipeline and the fuel dispenser.

04/

Foot Pedal Hydraulic Valve
The foot pedal hydraulic valve, also known as a double-door check valve, is one of the necessary accessories for fuel dispensers to prevent liquid backflow in the oil suction pipeline when shut down. It is suitable for liquid check of various pumps.

Specifications of Check Valve

Valve Type	Swing / Lift / Ball / Wafer / Dual Plate
Material	Carbon Steel / Stainless Steel / Alloy
Body Style	Wafer / Lug / Flanged / Threaded
Nominal Size Range	1/2″ – 24″
Pressure Rating	ANSI Class 150 – 900 / PN10 – PN40
End Connection	Flanged / Threaded / Butt Weld / Socket Weld
Seal Material	PTFE / EPDM / NBR / Viton
Operating Temperature	-40°C to +250°C
Flow Direction	Uni-directiona
Applicable Media	Water / Oil / Steam / Gas / Chemicals
Design Standard	API 600 / ASME B16.34 / ISO 5752
Face-to-Face	ANSI / DIN / ISO standards
Test Standard	API 598 / EN 12266
Application	Backflow protection in piping systems

Customization Options

Material Grade: Customizable

Size: Customizable

Connection Method: Customizable

Sealing Type: Customizable

MOQ: Customizable

Functions Of Check Valve

Preventing Backflow
Check valves are mainly created to stop flow in a system by permitting fluid movement in a single direction only to maintain system integrity and prevent contamination or equipment damage from occurring due to backflow disruptions.

Equipment Protection
Check valves are important not only for stopping backflow but also for safeguarding equipment like pumps, from potential harm caused by reverse flow situations. Pumps can easily get damaged if they experience flow in that direction. Check valves serve as a measure by making sure that once the pump stops working the fluid doesn' t flow back into it. This helps prolong the lifespan of the pump and lowers maintenance expenses in the run.

Pressure Retention
In systems, it' s crucial to have check valves as they play a role, in keeping the pressure at the right levels by stopping the reverse flow and maintaining pressure on one side of the valve where it' s needed for smooth operations and safety purposes.

Enhancing System Efficiency
Check valves boost the effectiveness of systems by controlling the flow direction and preventing backflow disturbances which can disrupt operations and lead to unnecessary energy consumption, in resolving flow problems.

Reducing Water Hammer
Water hammer occurs when there is a fluctuation in fluid flow that creates pressure spikes in pipelines. To address this problem effectively and minimize damage to pipes and fittings caused by water hammer incidents the use of check valves is essential to regulate the flow direction and prevent changes in pressure, within the system.

Supporting System Isolation Maintenance
Check valves are also crucial, for isolating systems during maintenance tasks by preventing flow and enabling specific system parts to be separated without impacting others. This makes maintenance and repair processes more accessible. Ensures the smooth operation of the remaining system components.

Common Materials of Check Valve

Stainless steel check valve

Stainless steel check valves are ideal for demanding environments because they resist corrosion, heat, and low temperatures. Due to their excellent mechanical properties, including high strength and durability, they have a long service life. These valves are well-suited for applications involving high temperatures and pressures, such as industrial processing, chemical plants, and oil and gas industries.
Stainless steel check valves are available in various grades - 304 and 316 are the most common. Grade 316 stainless steel offers enhanced resistance to chlorides and other corrosive substances. It is suitable for marine and coastal applications. While stainless steel check valves provide exceptional performance, they are less cost-effective than brass and plastic.

Plastic check valve

Plastic check valves are frequently used in irrigation and water management systems. Three common body materials are PVC, PP, and PA. They are corrosion-resistant to most corrosive media, such as seawater, acids, bases, chloride solutions, and organic solvents. However, be careful when using aromatic and chlorinated hydrocarbons; double-check whether the valve material is resistant to the specific hydrocarbon.

Brass check valve

Brass check valves are excellent for air, water, oil, or fuel applications. However, they are not resistant to seawater or chlorinated water. Compared to stainless steel, brass is less resistant to heat and corrosion. It is typically used for lower-pressure applications.

Installation Steps of Check Valve

Turn off fluid supply
If installing the check valve into an operating system, turn off the fluid supply to the piping or tubing where it will be installed.

Check valve and pipe evaluation
Check for foreign particles within the valve, as they can disrupt the smooth flow of media through it. Also, check for uneven edges, scratches, or anything else that could prevent the check valve from sealing properly.

For example, in the case of swing valves, move the flapper by pushing it away from the seating surface to ensure it moves freely. Also, ensure the pipes are clean and debris-free before installing the check valve.

Check valve placement
An arrow on the valve indicates the flow direction. Position the valve accordingly on the pipeline (horizontal or vertical).

Attach the check valve
Attach the check valve to the pipeline. There are many types of connections. The following provides general guidance on installing the check valve based on the connection type. Read our available articles on the various connection types to learn more.

Payment Terms

T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.

Packing & Transportation

productcate-534-394

FAQ

Q: How do I choose the right check valve for pressure requirements?

A: Select a check valve with pressure ratings equal to or higher than your system pressure, using ANSI class or PN rating based on your pipeline standard.

Q: Can a check valve handle different types of media like water, oil, or gas?

A: Yes, a check valve can handle various media including water, oil, steam, and gas when you choose appropriate materials and seals for compatibility.

Q: What are common body materials for industrial check valve products?

A: Common body materials for a check valve include carbon steel for general use and stainless steel (304/316) for corrosion resistance.

Q: Do check valves require regular maintenance?

A: A check valve should be inspected periodically for debris and proper seating to ensure reliable operation and prevent leakage or backflow.

Q: Can a check valve be installed in any orientation?

A: The installation orientation of a check valve depends on the design; always follow the manufacturer' s guidelines for proper vertical or horizontal placement.

Q: What sealing materials are used in a check valve to prevent leaks?

A: Sealing materials in a check valve such as PTFE, EPDM, or Viton are chosen based on fluid type, temperature, and pressure for reliable leak prevention.

Q: Is a check valve suitable for high temperature applications?

A: Yes, many check valve models are rated for high temperature operation (e.g., up to 250°C) when constructed with proper materials and seals.

Q: How should a check valve be installed?

A: Ensure the valve is on a straight run of pipe. There should be 5 pipe diameters before and 10-15 diameters after the valve. This ensures a steady flow through the valve.

As one of the most professional check valve manufacturers in China, we're featured by quality products and low price. Please rest assured to wholesale bulk customized check valve made in China here from our factory. If you have any enquiry about pricelist and free sample, please feel free to email us.

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