As a trusted check valve manufacturer and supplier in China, we provide a full range of non-return valves designed to ensure one-way flow and protect your system from backflow damage. Our check valves feature compact structure, precise sealing, and stable performance across various working conditions. They are widely used in water treatment, oil & gas, petrochemical, HVAC, and power generation systems. With options including swing, lift, dual-plate, ball, and axial flow check valves, we deliver reliable solutions that improve pipeline efficiency and extend equipment lifespan.
Key Features & Advantages
• Automatic Operation: Self-acting design, no external power required.
• Leak-Free Performance: Ensures tight sealing and reliable backflow prevention.
• Efficient Flow Design: Reduces pressure drop by about 20%, enhancing system efficiency.
• Fast Closing: Responds within seconds to prevent water hammer.
• Flexible Selection: Covers sizes up to DN1200, for all pipeline standards.
• Durable Construction: Withstands over 100,000 open/close cycles.
• Wide Application: Suitable for water, steam, oil, gas, and corrosive media.
| Item | Details |
| Main Products | Butterfly Valve / Ball Valve / Gate Valve / Globe Valve / Check Valve |
| Business Type Supported | OEM, ODM, distributors, agents, wholesalers, engineering companies, project contractors |
| MOQ | 1-100 units |
| Customization Options | Trademarks, materials, colors, pressure ratings, flange standards, packaging options, etc. |
| Application Industries | Water supply and drainage, petroleum, chemical, power, gas, HVAC, irrigation, papermaking, pharmaceuticals, new energy |
| Lead Time | 30-60 days (after contract signing and deposit receipt) |
| Quality Standards | API/CE/ISO/WRAS/EAC/customer standards available |
| Sample Policy | Test samples available |
| Payment Methods | T/T (30% deposit, balance before shipment)/LC negotiable |
| After-Sales Service | 12-month warranty, online technical support |
Automatic Operation: No external operating mechanism is required; opening and closing are achieved entirely by the inherent properties of the medium.
Zero Leakage Requirement: Tight isolation is guaranteed in the closed state to prevent any backflow of the medium.
Low Flow Resistance: Minimizes resistance to the flow in the open state.
Fast Response: Closes quickly when the flow rate drops to zero or backflow occurs.
Multiple Actuation Methods: Closing is achieved by gravity, spring force, medium pressure, or a combination of these.
Orientation Sensitivity: Different types of check valves have strict requirements for installation position and orientation.
A typical check valve consists of the following components:
Valve body: The pressure-bearing main body, containing the flow path and valve seat.
Valve disc (closing element): The core moving component, available in various forms (disc, ball, piston, etc.).
Valve seat: Mateed with the valve disc to form a seal.
Swing shaft (swing type): The pin that supports the rotation of the valve disc.
Lever (swing type): The component that connects the valve disc to the swing shaft.
Spring (spring-assisted type): Provides preload, ensuring rapid closing and sealing at low flow rates.
Cushion (slow-closing type): A hydraulic damping system that controls closing speed.
Guide sleeve (lift type): Guides the valve disc in the correct direction of movement.
Tianjin Dingliu valve Industry Co., Ltd. is a high-tech enterprise specializing in the valve and automation industry.
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