The double door check valve is engineered for professionals and system integrators requiring a robust solution to prevent reverse flow in complex pipeline networks. Intended for operators managing water, oil, and air media, this valve supports applications where space constraints demand a short face-to-face dimension and a spring-assisted double door design. The product from a leading double door check valve manufacturer addresses reliability and ease of maintenance, allowing engineering teams to deploy high-efficiency backflow protections in compact layouts without sacrificing performance or installation flexibility.
Featuring a soft seated double door check valve configuration, the product achieves excellent sealing even under low differential pressures, minimizing leakage and system inefficiencies. The spring-assisted design improves dynamic response, reducing water hammer effects and enabling faster valve closure. Constructed with durable materials such as ductile iron, carbon steel, and stainless steel, it accommodates operating pressures up to 16 bar and temperature ranges from -25°C to 180°C. The valve is tested to meet API 609 and ASME standards, ensuring compliance for demanding industrial settings. This double door check valve offers a wafer-type connection suitable for DN40 to DN600 pipe sizes, ensuring integration compatibility within various pipeline architectures.
This double door check valve manufactured by reputable double door check valve manufacturer entities supports diverse industries including chemical processing, water treatment, HVAC systems, and oil and gas pipelines. Its compact design facilitates installation in restricted spaces often encountered in retrofit and upgrade projects. The valve’s minimal flow obstruction allows for consistent operational efficiency, aligning with fluid control system requirements where pressure drop must be minimized. It is a dependable component for pump and compressor protection, safeguarding equipment from reverse flow damage and optimizing system uptime in industrial environments that demand precision and durability from dual plate check valve manufacturer products.
Product Advantages：
1.Engineered with a simple and robust design featuring a single moving part—the disc.This inherent simplicity reduces potential failure points,
ensures dependable backflow prevention, and leads to a long, low-maintenance service life with minimal downtime.
2.When fully open, the single disc swings completely out of the flow path.This creates a full, unobstructed port that minimizes pressure drop
(head loss) across the valve, improving overall system efficiency and reducing energy consumption from pumps or compressor sets.
Standards and Certifications：
Design and Manufacture: API 609, ASME B16.34, ASME Section VIII
Flange Standards: ASME / ANSI: Class 125LB & 150LB; EN / DIN: PN6-16; BS / AS: BS 10 Table D/E, AS 2129 Table D/E; JIS: 5K,10K (JIS B2220)
Face-to-Face Dimension: API 609, ISO 5752, EN 558-1, ASME B16.10, MSS SP-68
Testing & Inspection Standards: API 598; EN 12266-1; ISO 5208; BS 6755-1
Certifications & Conformity: ISO 9001:2025; CE Marking (PED);
Specification of the Valve:
Type of Connection: Wafer
Size: DN40~DN600 (11/2~24 in)
Pressure: 0-16bar(0mpa~1.6Mpa)
Testing Pressure : Shell: 1.5 x Rated Pressure; Seat: 1.1 x Rated Pressure (acc. to API 598)
Medium:: Water/Oil/Air
Medium Temperature: -25~180℃
Material of the Valve:
Body: Ductile Iron, Carbon Steel (WCB, WCC), Low-Temp Carbon Steel (LCB, LCC, LC1)
Disc: Ductile Iron,SS304, SS316, Duplex 2205, Super Duplex 2507, Aluminum Bronze
Stem: Stainless Steel: SS420; SS304, SS316, 17-4PH (SS630); Duplex 2205, Super Duplex 2507
Seat: EPDM, HTEPDM, NBR (Buna-N), SIL (VMQ), FKM (VITON™), HYPALON™
Coating Epoxy: Resin 200um ~250um
Use Scenarios
Compact Backflow Prevention in Confined Pipeline Installations
In urban water distribution and HVAC systems where space for valve installation is highly restricted, the double plate check valve demonstrates superior suitability. These environments demand compact valve designs capable of rapid response and effective backflow prevention without impeding flow efficiency. Installed typically in wafer-style flanged connections, the valve from a qualified double door check valve manufacturer preserves pipeline integrity by preventing reverse flow and minimizing system pressure drop. Its spring-assisted double door mechanism complies with stringent operational standards and seamlessly integrates within automated control sequences, providing reliable and maintenance-friendly operation in space-limited infrastructure.
Critical Protection in Oil and Gas Pump Systems
In the oil and gas sector, safeguarding pumps and compressors from reverse flow is essential to prevent equipment damage and operational downtime. The double disc check valve engineered and produced by experienced double disc check valve factory professionals excels in this role due to its quick-closing double door design and spring assistance, which collectively reduce water hammer effects and flow disruption. Capable of handling varied media at moderate to high pressures and temperatures, the valve meets rigorous industry standards ensuring compatibility and reliability. Integration into pipeline networks supports continuous operation and system resilience, demonstrating tangible value to process engineers and maintenance teams responsible for ensuring asset protection and system longevity.
ABOUT US
Hebei Diefei Valve Co., Ltd., which was established in 1986,is a specialized factory gathering the medium and lower pressure valve developing, manufacturing and selling together. We established Crane Ningjin Valve Co., Ltd with Crane Valve USA in 1995.
Our main products are Butterfly valve, Check Valve, Gate Valve, Ball Valve, Valve Actuator and so on. These valves are available extensive to the pipelines of oil, metallurgy, chemical industry, medical, light textile, paper-making, water and electricity ,tap water company ,central air conditioning system etc.
We own perfect manufacturing process and testing way of casting, matching and assembling. We are authorized the Quality Management system certificate of ISO9001:2015, Environmental Management system certificate of ISO14001:2004,CE Certificate and the Approval of Manufacturer Certificate of DNV. Our company products are mainly sold to many large-scale agglomerations like CNPC, Sinoepc, CSPC, DAIKIN , Haier, Midea and etc. And exported to USA, Europe, Africa, Southeast Asia, Taiwan etc countries and area.
We are willing to serve our customers at home and abroad with our excellent products and services.
CERTIFICATE OF NSF61/372
PACKAING AND TRANSPORTATION
