Product Description
The double door check valve is engineered to meet the demanding requirements of fluid systems requiring reliable backflow prevention and compact installation. As supplied by an experienced double door check valve manufacturer, it targets process engineers and procurement professionals who need valves capable of fitting into limited space with a wafer-type connection. This valve type delivers rapid dynamic response with spring-assisted double doors to prevent reverse flow while maintaining low pressure loss, ideal for mid-pressure pipelines handling liquids and gases. Users benefit from its versatility across multiple media, making it a valuable component in complex piping infrastructures.
This double door check valve is built with precise engineering standards, combining durable materials such as ductile iron and stainless steel to support pressure ratings up to 25 bar. The spring-assisted double door design improves closure velocity and reduces water hammer effects compared to conventional valves. Equipped with a soft-seated component, the valve maintains excellent sealing performance even under low differential pressures, thereby minimizing leak risk. Its short face-to-face dimension facilitates installation in compact spaces without compromising flow capacity. Compliance with standards such as API 609 and ASME B16.34 ensures compatibility and operational safety, making it a dependable valve solution. The design also promotes ease of maintenance with low wear on moving parts.
Widely utilized in water treatment, chemical processing, HVAC, and oil and gas pipeline systems, the double door check valve integrates seamlessly into installations demanding robust backflow prevention and energy efficiency. Its capacity to minimize pressure drop supports pump system longevity and enhances operational cost-effectiveness. Provided by an established double door check valve manufacturer, this valve aligns with international regulations, supporting global operational consistency. The spring-assisted mechanism contributes to faster valve response times in critical system scenarios where rapid flow reversals must be managed. The valve’s durability and low maintenance profile make it suitable for industrial facilities requiring reliable fluid control with minimized downtime.
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: PN16-25; BS / AS: BS 10 Table D/E, AS 2129 Table D/E; JIS: 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: DN80~DN300 (3~12 in)
Pressure: 0-25bar(0mpa~2.5Mpa)
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: 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
In municipal and industrial water treatment environments, space constraints often require components with reduced face-to-face dimensions. The double door check valve, supplied by a proficient double disc check valve factory, fits precisely in these scenarios with its wafer design. Its role is to prevent backflow, safeguarding pumps and treatment equipment from potential contamination or damage. The valve’s spring-assisted closure mechanism ensures fast response to flow reversal, complying with industry standards and minimizing downtime. It integrates smoothly with existing pipeline networks, offering a reliable sealing solution that accommodates fluctuating pressures and diverse fluids such as potable water and process waste streams, facilitating efficient plant operations.
Within oil and gas processing plants and transportation pipelines, maintaining directional flow is critical for safety and efficiency. The double door check valve functions as an automatic backflow prevention device, designed to operate reliably under pressures up to 25 bar and temperatures reaching 180°C. Its robust construction by a dedicated dual plate check valve manufacturer ensures durability in harsh environments and resistance to corrosive media. The spring-assisted design dampens pressure surges and reduces mechanical shock to piping systems. Installed in-line with other pipeline components, the valve supports continuous flow regulation with minimal pressure loss, aligning with strict compliance requirements and enhancing system reliability in this high-stakes operational context.
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
