API 609 Certified Single Door Check Valve - Single Door Check Valve Manufacturer

Description
About DIEFEI

Product Description

Functional Positioning for Industrial Fluid Control

This single door check valve is engineered for pipeline systems requiring dependable backflow prevention and flow control. Designed by a specialized single door check valve manufacturer, it suits engineers and procurement teams focused on enhancing system reliability and reducing downtime. Its single plate check valve structure and single disc check valve characteristics provide simplified maintenance and cost-effective operation. The valve integrates smoothly into both retrofit and new installations where compact dimensions and tightened installation space are critical parameters.

Precision Engineering and Material Specifications

Built to the highest technical standards, this single door check valve features a robust body constructed from ductile iron or carbon steel grades. The internal single disc check valve component utilizes corrosion-resistant stainless steel or duplex alloys, ensuring longevity under pressures up to 25 bar and temperatures ranging from -25°C to 180°C. A soft seat design guarantees leak-free operation even at low differential pressures, optimizing system efficiency with minimal flow resistance. The valve meets certifications such as API 609 and ASME B16.34, verified through rigorous testing protocols. Compliance with ISO 9001:2025 confirms its quality assurance.

Application Versatility in Critical Industries

This valve, supplied by a proven single disc check valve factory, finds broad application across water, oil, and air transport systems where precise fluid control and backflow prevention are mandated. Industries including chemical processing, power generation, and municipal water supply benefit from its reliable sealing and standard-compliant design. The single plate check valve form factor allows integration into tight spaces common in existing infrastructure upgrades or compact assembly lines. The valve’s capability to maintain tight sealing under fluctuating pressures ensures process safety and operational continuity in demanding environments.

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

Compact Pipeline Installations in Water Treatment Plants

In water treatment and distribution networks, space constraints often limit the choice of backflow prevention devices. This single door check valve, produced by a dedicated single door check valve manufacturer, excels in fitting pipeline assemblies with compact face-to-face requirements. Its single plate check valve design ensures minimal pressure loss across the valve body, preserving hydraulic efficiency critical in large-scale water supply systems. The valve’s robust sealing capability helps maintain water purity by preventing reverse flow contamination, complying with stringent municipal regulations. Integration within automated monitoring and control systems enhances plant operational stability and resource management.

Fluid Control in Oil and Gas Processing

The oil and gas sector demands valves that withstand corrosive media and variable conditions. Utilization of this single disc check valve factory’s product offers a reliable check valve solution that maintains integrity against hydrocarbons and gaseous mixtures. The valve’s alloy-constructed disc and stem resist erosive action, while the soft seat ensures leak-tightness even in fluctuating pressure environments. Serving as a backflow preventer within pipelines, it prevents hazardous flow reversals that could compromise process safety. Its certification compliance supports adherence to industry safety codes, and straightforward integration with existing pipeline control systems facilitates seamless operation within complex refinery infrastructures.

FAQ

What materials are used in your single door check valve?

Our single door check valve bodies are made from ductile iron or various steel grades like carbon steel and low-temperature carbon steel. The disc and stem components use corrosion-resistant materials including stainless steel SS304, SS316, and duplex alloys to ensure durability and reliable performance.

Can you customize the valve size and seat materials for specific applications?

Yes, we offer customization for valve sizes ranging from DN80 to DN300 and provide multiple seat material options such as EPDM, FKM (VITON™), and SIL (VMQ). This flexibility ensures that our single disc check valve factory meets your precise operational requirements.

How easy is it to install and maintain your single plate check valve?

Our single plate check valve features a compact, wafer-type design with short face-to-face dimensions for installation in tight pipeline spaces. Its simple construction minimizes maintenance needs and reduces potential failure points, allowing for efficient servicing and longevity.

What certifications ensure the quality and reliability of your valves?

Our valves, including the single door check valve, comply with international standards such as API 609, ASME B16.34, and ISO 9001:2025. They also carry CE marking. These certifications underline our commitment to manufacturing reliable valves suitable for critical fluid control applications.

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.