Products Description
A swing check valve is an essential automatic one-way flow control device designed to prevent backflow of liquid, gas, and steam in pipeline systems. Featuring a free-swinging disc that rotates around the valve seat hinge, this valve fully opens with medium flow pressure and automatically closes relying on medium back pressure and gravity to block reverse flow, protecting pipeline equipment, pumps, and system circuits from damage caused by backflow and water hammer.
Widely applicable to industrial, commercial, and municipal pipeline systems, our swing check valves adopt optimized structural design, achieving full-bore flow, low flow resistance, and stable operation. They support long-term continuous working conditions and are compatible with various mediums and pressure grades, serving as a reliable core component for pipeline safety operation.
Core Features & Advantages
Full Flow & Low Pressure Loss
The full-bore internal structure eliminates flow barriers, ensuring unobstructed medium circulation with minimal pressure drop. It effectively reduces pipeline energy consumption and improves overall system operating efficiency compared with lift check valves.
Excellent Backflow Prevention Performance
The swing disc fits closely with the precision-machined valve seat, achieving tight sealing and zero backflow. The gravity-assisted closing structure responds quickly to reverse flow, effectively avoiding pipeline backflow accidents.
Durable & Long Service Life
Key components including the valve body, disc, and hinge pin are made of high-strength cast steel, stainless steel, and ductile iron. Wear-resistant and corrosion-resistant sealing materials are adopted to adapt to high temperature, high pressure, and corrosive working environments, reducing frequent replacement and maintenance costs.
Stable & Quiet Operation
The flexible swing opening and closing structure avoids rigid collision and vibration, effectively reducing operating noise and water hammer impact, protecting pipelines and supporting equipment from fatigue damage.
Product Technical Parameters
comparison of product parameters
|
Parameter Item |
Specification |
|---|---|
|
Nominal Diameter |
DN15 - DN1200 (1/2" - 48") |
|
Pressure Grade |
PN10, PN16, PN25, PN40; Class150 - Class2500 |
|
Valve Body Material |
Ductile Iron, Cast Steel (WCB), Stainless Steel (304/316L), Alloy Steel |
|
Sealing Material |
PTFE, Rubber, Stainless Steel Hard Seal, Alloy Seal |
|
Applicable Medium |
Water, Sewage, Oil, Natural Gas, Steam, Chemical Corrosive Medium |
|
Working Temperature |
-29℃ ~ 425℃ (Customizable for ultra-low/high temperature) |
|
Connection Mode |
Flange, Thread, Welded, Wafer |
|
Execution Standard |
GB, ANSI, API, DIN, JIS |
|
Sealing Performance |
Zero leakage, compliant with international industrial valve standards |
Application Scenarios
Swing check valves are widely used in various pipeline systems that require one-way flow control, with strong environmental adaptability:
Water Supply & Drainage Engineering:
Municipal water supply pipelines, sewage treatment systems, pump station supporting pipelines to prevent water backflow and pipeline emptying.
01
Petroleum & Chemical Industry:
transmission pipelines, chemical medium conveying systems, refining equipment pipelines, adapting to corrosive and high-pressure medium working conditions.
02
Power Industry:
Thermal power, hydropower plant steam and water circulation systems, protecting boilers, turbines, and pump units from backflow damage.
03
HVAC & Building Engineering:
Central air conditioning water circulation systems, building fire water supply pipelines, ensuring stable system operation.
04
Product Structure & Working Principle
The swing check valve consists of a valve body, valve cover, swing disc, hinge pin, and sealing seat. When the medium flows forward, the flow pressure pushes the swing disc to rotate outward and open, forming a full-flow channel with no flow resistance. When the medium flow stops or reverse flow occurs, the disc automatically closes tightly against the valve seat under the action of backflow pressure and its own gravity, cutting off the reverse flow channel instantly. The integral hinge structure ensures flexible rotation without jamming, realizing automatic one-way flow control throughout the operation process without manual intervention.
Our Advantages & Service Guarantee
Strict Quality Control
All valves undergo pressure testing, sealing testing, and appearance inspection before leaving the factory, with 100% quality qualification rate.
Customized Support
Provide personalized customization of size, material, pressure, and sealing form according to customer working conditions.
Fast Delivery
Sufficient conventional product inventory, supporting bulk order rapid delivery and customized product efficient production.
Professional After-sales
Provide 24-hour technical consultation, installation guidance, and after-sales maintenance services, with a long-term product warranty.
Products Description
ISO certification serves not merely as a fundamental industry qualification benchmark for our enterprise, but also a full demonstration of our robust quality control, standardized compliance system and core market competitiveness. It empowers our manufacturing transformation from traditional low-end production to high-end, standardized and refined production.
Company Profile
SND is a professional and leading valve manufacturer focused on high-performance hydraulic control valves and innovative fluid control solutions. Backed by international patents and technical cooperation resources, we operate in strict accordance with the ISO 9001 quality management system, delivering defect-free products and establishing a solid benchmark in the valve industry.
Equipped with advanced automated production lines and integrated digital management systems, we guarantee consistent product reliability, with all products officially certified by China's construction authorities. Supported by a nationwide sales and service network, we persist in technological innovation, continuously develop next-generation valve products, and provide global clients with reliable, high-efficiency and industry-leading flow control solutions.
FAQ
FAQ
Q: What is a swing check valve used for?
A: Swing check valves are automatic one-way pipeline valves. They allow forward flow of liquid, gas and steam, and automatically close to prevent backflow. They protect pipeline and pump equipment, and are widely used in water supply, drainage, petrochemical, power and HVAC systems.
Q: What is the difference between a swing check valve and a lift check valve?
A: Compared with lift check valves, swing check valves feature full-bore design with lower flow resistance and less pressure loss. They run quieter with slight water hammer effect, suit large-diameter pipelines, and require less maintenance for long-term operation.
Q: What installation directions are available for swing check valves?
A: This valve supports horizontal installation and vertical upward installation. It cannot be used for vertical downward flow. The flexible installation method adapts to most conventional pipeline projects.
Q: What mediums and temperatures can your swing check valves adapt to?
A: It is suitable for water, sewage, oil, gas, steam and common corrosive chemical media. The standard working temperature ranges from -29℃ to 425℃. Custom temperature-resistant models are available for special working conditions.
Q: Are your swing check valves leak-proof?
A: Yes. Equipped with precision-fit sealing structure and multiple sealing materials, our swing check valves achieve zero leakage under standard conditions. All products pass strict factory sealing tests and meet international industry standards.
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