Check Valve

Xiamen Hongyu Intelligent Technology Co., Ltd. is a domestic professional manufacturer and comprehensive supplier of valves. It has been deeply engaged in the field of pipeline fluid accessories for many years, focusing on high-quality check valve series products. The company's products cover a variety of materials, connection forms and structural types, can be suitable for chemical industry, water supply and drainage, mechanical equipment, oil and gas transportation and other multiple conditions, relying on superb manufacturing technology and stable product performance, by global procurement customers recognition and trust.

Process Condition Adaptation Solution

In the operation and maintenance of industrial pipeline systems, backflow of the medium is a common pain point that can easily cause equipment failures and pipeline losses. High-quality products can prevent such problems at their source. For large industrial pipelines and high-pressure transportation pipelines, the flange check valve, with its flange connection structure, is installed firmly and has strong sealing performance. It is also very convenient for disassembly, maintenance and repair. It is widely used in municipal water supply, large chemical industrial parks and other scenarios.

To further adapt to the on-site environment with narrow space and compact pipeline layout, we have optimized the structural design and launched the 3 flanged check valve. On the basis of maintaining the stability of the flange connection, the valve body volume is reduced without sacrificing the pressure-bearing capacity, perfectly solving the installation problems in narrow Spaces.

Material classification selection

The physical properties of the medium directly determine the service life and operational performance of the valve, and this is also a key consideration for overseas buyers when making selections.

Facing highly corrosive working conditions such as acidic and alkaline liquids and seawater, stainless steel check valve flanged is forged from food-grade and industrial-grade stainless steel. It is rust-resistant and oxidation-resistant. There will be no problems such as leakage and valve body damage even when immersed in special media for a long time. It is suitable for harsh environments such as Marine engineering and fine chemicals.

For common scenarios such as domestic water supply and drainage, gas transportation, and small mechanical equipment, brass check valve becomes a cost-effective choice. Brass has good ductility, excellent sealing performance, high processing accuracy, and a price advantage, with lower cost for bulk purchases.

Structural Function Analysis

Apart from the material and connection method, the internal opening and closing structure of the valve is the key factor affecting the anti-backflow effect and operational efficiency. Whole series of check valve according to the principle of opening and closing is divided into a variety of structure type, all-round meet the demand of differentiating curtains. Among them, the back flow valve is the basic anti-backflow accessory, featuring a simple structure and low failure rate. It completes the opening and closing action independently based on the direction of the medium flow, has low flow resistance, and does not affect the fluid transportation efficiency. It is suitable for conventional pipeline systems with flow rate requirements and is also a basic product for general engineering procurement.

Test Item		Shell Test	Seal Test	Back Seal Test	Air Seal Test
Medium		Water			Air
Unit		MPa	MPa	MPa	MPa
Nominal Pressure PN(MPa)	1.6	2.4	1.8	1.8	0.5~0.7
	2.5	3.8	2.8	2.8
	4.0	6.0	4.4	4.4
	6.4	9.6	7.0	7.0
	10.0	15.0	11.0	11.0
	16.0	24.0	18.0	18.0

Based on this, the upgraded swing check valve adopts a rotary valve disc design, with flexible and sensitive opening and closing actions. The large-diameter models can handle large flow of fluids for transportation. It is highly used in power stations and large water treatment projects. This structure has low operating noise, good closure buffering effect, and can effectively reduce the impact of water hammer on the pipeline, extending the service life of the entire pipeline equipment.

Precision quality assurance

For complex working conditions such as high pressure, high frequency start-stop, and instantaneous impact, we have introduced high-precision structural models to further enhance the comprehensive performance of the products, helping customers achieve long-term and stable operation of their equipment. The non return valve focuses on the demand for zero leakage and backflow prevention. The valve seat and sealing parts are precisely ground and processed. After closing, the sealing gap is extremely small, which can completely block the backflow of the medium. Even under high-pressure impact, it can maintain a complete seal. It is an essential accessory for precision pipelines with extremely high leakage prevention requirements.

For scenarios involving the transportation of high-temperature and high-pressure media such as steam and hot oil, the piston check valve adopts a piston-driven transmission structure and comes with a buffer and shock absorption design. It can withstand instantaneous medium impact and has outstanding high-temperature and high-pressure performance. As the original manufacturer, all our check valve products undergo multiple tests such as water pressure, air pressure, and durability opening and closing before leaving the factory. We strictly control every production process. At the same time, we support customization of specifications and OEM services, and are equipped with a complete logistics and after-sales system to provide global buyers with a full-process service from selection, supply to after-sales.

FAQ

What is the purpose of a check valve?

A check valve is used to prevent fluid from flowing backward in pipelines and protect the whole piping system.

What is the difference between a backflow and a check valve?

Backflow refers to the unwanted reverse flow of fluid, while a check valve is a mechanical device designed to stop this phenomenon in pipelines.

What are the benefits of using a check valve?

Using a check valve can effectively prevent fluid backflow, protect pipeline equipment, reduce maintenance costs and ensure the safe and stable operation of the entire system.