Introduction
Dual plate check valves are widely used in water, sewage, and marine systems to prevent reverse flow and protect pipelines, pumps, and equipment. Compared to traditional swing check valves, dual plate designs offer faster closing response, reduced water hammer, and a more compact footprint. SW Valve’s dual plate check valves are engineered to deliver reliable, leak-safe performance in large-diameter and high-pressure water applications.
Product Overview
SW Valve’s dual plate check valves are designed for durability, sealing integrity, and ease of installation across global infrastructure standards.
• Size Range: DN50 to DN1800 (2 inch to 72 inch)
• Working Pressure: Up to 50 bar
• Valve Type: Dual plate (double door) check valve
• Design Feature: No retainer bolts penetrating the pressure boundary
Materials
To accommodate various operating environments and corrosion conditions, SW Valve offers multiple material options:
• Cast Iron
• Ductile Iron
• Carbon Steel
• Stainless Steel 304
• Stainless Steel 316
• Aluminum Bronze (ALBRONZE)
This material flexibility allows the valve to be optimized for drinking water, seawater, and aggressive service conditions.
Connection Standards
SW Valve’s dual plate check valves are compatible with a wide range of international flange standards, making them ideal for new installations and retrofit projects:
• ANSI B16.1 Class 125LB
• ANSI B16.5 Class 150LB
• MSS SP-44 Class 150LB
• AS 2129 Table D & E
• BS 4504 PN6 / PN10 / PN16
• BS 10 Table D & E
• DIN 2501 PN6 / PN10 / PN16
• ISO 2531 PN6 / PN10 / PN16
• KS / JIS 5K, 10K, 16K, 20K
This extensive compatibility reduces installation complexity and project risk.
Key Design Advantages
SW Valve’s dual plate check valves incorporate design features that enhance reliability and safety:
• Dual spring-loaded plates for rapid closing response
• Reduced flow resistance compared to swing check valves
• Compact wafer-style body requiring less installation space
• Balanced closing action to minimize water hammer
• Stable operation in both horizontal and vertical pipelines
No-Retainer Design: Eliminating Leak Paths
A critical advantage of SW Valve’s dual plate check valves is the no-retainer design.
Unlike some traditional designs that use retainer bolts passing through the body, SW Valve’s valves:
• Fully close the pressure boundary
• Eliminate external leak paths
• Improve long-term sealing integrity
• Enhance safety in buried or submerged installations
This design is especially valuable in municipal water and sewage systems where external leakage is unacceptable.
Applications
SW Valve’s dual plate check valves are widely used in:
• Municipal water supply systems
• Sewage and wastewater treatment plants
• Drinking water distribution networks
• Seawater intake and discharge pipelines
• Industrial water circulation systems
The valve design supports stable operation in continuous-duty infrastructure environments.
How SW Valve Differs from Typical Chinese Manufacturers
While many Chinese manufacturers offer dual plate check valves at lower upfront prices, differences in design execution and quality control can significantly affect long-term performance.
• True No-Retainer Construction: SW Valve fully eliminates pressure-boundary penetrations, reducing leak risk.
• Material Verification: Controlled material sourcing and traceability ensure consistent mechanical strength and corrosion resistance.
• Spring & Hinge Quality: Precisely engineered springs and hinge pins provide balanced, repeatable closing action.
• Dimensional Accuracy: Tight machining tolerances ensure proper plate alignment and sealing.
• Standards Compliance: Full alignment with ANSI, DIN, BS, JIS, ISO, and AWWA-related standards.
• Lifecycle Reliability: Designed for decades of service in municipal infrastructure—not short-term replacement cycles.
• Technical Communication: Clear English documentation and responsive engineering support for international buyers.
For American buyers and public utilities, these differences translate into lower maintenance costs, reduced leakage incidents, and higher system reliability.
Conclusion
SW Valve’s dual plate check valves provide a compact, efficient, and leak-safe solution for water and sewage systems. Through no-retainer design, high-quality materials, and strict manufacturing control, SW Valve delivers valves that meet the long-term demands of public infrastructure.
Compared to many low-cost alternatives, SW Valve offers American and global buyers confidence, durability, and long-term value—making it a trusted partner for critical water and marine flow control applications.
Media Contact
Company Name: SW Valve Corporation
Contact Person: Jungheon Park
Email:Send Email
Phone: +82-55-314-5046
Address:49-52, Seobu-ro 1499beon-gil, Juchon-myeon
City: Gimhae-si
State: Gyeongsangnam-do
Country: South Korea
Website: https://sw-valve.co.kr/
