Check Valve

The SGON check valve is a precision-engineered, automated fluid control device designed to prevent medium backflow and ensure unidirectional flow in piping systems. By allowing fluid to flow in one direction only, it safeguards equipment and systems from potential damage caused by reverse flow, ensuring operational safety and stability. SGON check valve can be divided into lifting check valve and swing check valve.

Key Features:

Automatic Operation: Self-actuating design eliminates the need for external power, ensuring reliable performance during system operation

Robust Construction: Available in swing, lift, and dual-plate designs to suit various flow conditions and pressure requirements

High-Performance Sealing: Precision-machined sealing surfaces ensure tight shutoff, preventing backflow and leakage

Material Versatility: Options include stainless steel for corrosion resistance, carbon steel for cost-effective strength, and duplex steel for high-strength, high-corrosion applications

Wide Range of Connections: Flanged, threaded, wafer, and butt-weld end connections compliant with ANSI, DIN, JIS, and ASME standards

2-Piece Vertical Lift Threaded End Check Valve

China Y-Type Stainless Steel Check Valve

SS Swing Disc Check Valve Threaded End 200WOG

Best Price Wafer Type Check Valve PN40

3 Pieces Spring Vertical Non-Return Check Valve

WCB SS304 SS316 150LB 300LB Flanged Swing Check Valve

CF8 150LB One Way Flanged Swing Check Valve

A105 300 LB Female Thread One Way Swing Check Valve

A105 800LB Forged Steel Swing Check Valve

Frequently Asked Question

What are the main application scenarios of Seiko check valves?

Shigong check valves are widely used in oil and gas, chemical, electric power, water treatment and other industries, mainly used to prevent backflow of media, to protect pipeline and equipment safety. For example, they can be installed at the pump outlet to avoid the water hammer effect caused by the backflow of the medium.

How is the sealing performance of check valves guaranteed?

Optimized by the following design: Sealing surface materials: Stainless steel, flexible graphite and other corrosion- and wear-resistant materials are used to ensure long-term sealing performance Structural design: such as Double Piston Effect (Double Piston Effect) or Self-relieving Seat (Self-relieving Seat) to enhance sealing reliability. Testing standards: Before leaving the factory, it passes the hydrostatic test, color probe (PT) and other tests to ensure that there is no leakage.

What do I need to be aware of when installing a check valve?

Flow direction marking: ensure that the valve installation direction and media flow direction (valve body arrow indication) Environmental suitability: in the pollution-prone environment (such as sand, rain and snow), it is recommended to install the valve stem protective cover. Pipeline cleaning: remove impurities in the pipeline before installation to avoid clogging the valve flap

What are the key points for routine maintenance?

Regular inspection: check the wear of sealing surface quarterly, replace packing or apply anti-rust oil in time. Lubrication management: add grease to the valve stem and transmission parts to prevent jamming Pressure test: Seal performance test once a year to ensure the reliability of the valve

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