Dual Check Valve

Name: Dual Check Valve
Brand: Types Of Industrial Valves Casting Supplier Manufacturer in China | THRIVEON Valve
Availability: InStock
Rating: 4.4 (131 reviews)

Dual Check Valve – Reliable Backflow Prevention & Low Pressure Drop for Industrial Piping

Dual check valves engineered for municipal water, wastewater, HVAC, and process industries — delivered in 8–12 weeks with full ISO 9001, UL/FM & WRAS compliance.

📩 Get Free Quote in 24h 📋 View Technical Specs

✔ Trusted by engineers in 14+ countries including USA, Saudi Arabia, South Africa & Italy.

Ningjin Thriveon dual check valve factory

⚙️ Thriveon’s 30,000 m² manufacturing facility – dual check valve assembly area.

Why Standard Check Valves Cost You Time, Water & Money

Every day we speak with procurement managers and plant engineers who are frustrated by:

Water hammer and pressure surges – old swing check valves slam shut, damaging pipes and instruments. Repair costs average $4,700 per incident in industrial plants.
Backflow contamination – single-plate designs fail to seal properly, leading to cross-contamination risk and non-compliance with local backflow regulations.
High head loss – bulky check valves create excessive pressure drop, increasing pump energy consumption by up to 18%.
Frequent maintenance & short service life – inferior elastomers and thin disc materials cause leakage within 6–8 months, especially in grit-laden wastewater.
Long, unreliable lead times – traditional suppliers quote 16–20 weeks with little visibility on production status.
Oversized inventory – lack of standardization forces you to stock multiple lengths and end configurations.

💡 The real cost? Between unscheduled downtime, energy waste, and compliance fines, a poor-quality check valve can cost $12,000–$25,000 per year per installation. It doesn’t have to be that way.

Thriveon Dual Check Valve – Engineered for Zero Backflow & Long Service Life

Our dual check valve (dual plate check valve / wafer check valve) uses a compact, spring-assisted dual-disc design that closes instantly at zero flow, preventing backflow and water hammer. Designed for horizontal or vertical installation, it delivers the lowest pressure drop in its class.

🔧 Non-Slam Design

Spring-loaded dual plates close before reverse flow develops. Eliminates water hammer even in rapid pump shutdown scenarios.

📉 Ultra-Low Head Loss

Streamlined body and lightweight discs reduce pressure drop by up to 40% compared to conventional swing check valves. Save on pump OPEX.

🔒 Reliable Sealing

Buna-N / EPDM / Viton® seat liners provide bubble-tight shut-off (zero leakage per API 598). Suitable for potable water, seawater, oils, and gases.

🧪 Full Traceability

Each valve is hydrostatically tested, serialized, and comes with a material certificate (EN 10204 3.1). Full supply chain transparency.

🌐 Global Compliance

Certified to ISO 9001, WRAS (UK), UL/FM (US), CE/PED (EU), and RoHS. Ready for projects requiring local code approval.

⚡ Short Lead Time

Manufactured in our Hebei factory with 8–12 week standard lead time. Express service available for urgent orders (4–6 weeks).

Where It Works Best

Municipal water & wastewater – backflow prevention in pumping stations, treatment plants, and distribution networks.
HVAC & cooling towers – condenser water loops, chillers, and cooling water recirculation.
Industrial process – chemical dosing, fire protection systems (UL/FM listed), and compressed air lines.
Oil & gas – light hydrocarbon and produced water applications (NACE MR0175 available).
Irrigation & agriculture – high-volume water transmission with sand-laden fluids.

📐 Technical Specifications – Dual Check Valve (Wafer Style)

Parameter	Available Range	Standard Options
Size	DN50 – DN600 (2" – 24")	DN80, DN100, DN150, DN200, DN250
Pressure Rating	PN10 / PN16 / PN25 / Class 150 / Class 300	Class 150 (PN16) most common
Body Material	Cast Iron / Ductile Iron / WCB / CF8 / CF8M	Ductile Iron (ASTM A536) stock
Disc Material	Ductile Iron / SS304 / SS316 / Duplex	SS316 for corrosive media
Seat / Liner	Buna-N / EPDM / Viton® / PTFE	EPDM for potable water
Spring	SS301 / Inconel X-750 (for high temp)	SS301 standard
Temperature Range	-20 °C to +150 °C (standard)	High-temp option up to 250 °C
End Connection	Wafer (ANSI B16.5 / EN 1092-2)	Lug style available on request
Certification	ISO 9001, WRAS, UL/FM, CE/PED, RoHS	WRAS & UL listed stock items
Testing	API 598 / EN 12266‑1	100% hydrostatic + 100% seat test

* Custom materials (Duplex, Super Duplex, Hastelloy) and NACE MR0175 available for sour service. Minimum order quantity: 10 pcs for standard sizes.

Trusted by Engineers & Procurement Teams Globally

🔹 BESIX Group 🔹 Veolia Water 🔹 Saudi Aramco (approved vendor) 🔹 ACWA Power 🔹 Webcor 🔹 SUEZ

*Partial client list. All logos used with permission. Thriveon is an approved supplier for multiple EPC contractors.

ISO 9001:2015 CE / PED 2014/68/EU UL / FM (selected models) WRAS (UK) RoHS API 598 NACE MR0175 (on request)

“We replaced 36” swing check valves with Thriveon dual plate check valves at our Ruwais desalination plant. Water hammer dropped to near zero, and we cut pump energy by 12%.”

— Eng. Khalid Al Ansari

Senior Mechanical Engineer, ACWA Power (UAE)

“Thriveon’s dual check valves helped us achieve WRAS compliance for a potable water network in Manchester. Delivery was 9 weeks – 6 weeks faster than our previous supplier.”

— Sarah Mitchell

Procurement Manager, BESIX Water UK

2 Brass Gate Valve

“We ordered 200 pcs DN100 Class 150 dual check valves for a cooling tower retrofit. The material certs and PMI reports were flawless. Saved us 22% vs. the European alternative.”

— Tom Reynolds, CEng

dual check valves dual check valve assembly duo check valve

Project Director, Webcor Industrial (USA)

“The OEM/ODM support is outstanding. Thriveon customized the spring tension for our compressed air system, and the valves have been running 24/7 for 14 months with zero leakage.”

— David Okonkwo

Plant Manager, Niger Delta Refinery

⭐ What Our Customers Say

Michael Torres
Chief Engineer, AquaSource LLC, Florida

“We installed 50 dual check valves in our water treatment plant. Two years in – not a single failure. The price-quality ratio beats anything we sourced from Europe. Highly recommend for potable water service.”

Dr. Amina El-Sayed
Technical Director, Nile Water Authority, Egypt

“Thriveon’s dual check valves helped us reduce non-revenue water by 7% due to better backflow prevention. The ISO 9001 and WRAS certifications gave our board full confidence. Excellent after-sales support.”

James Whitaker
Supply Chain Manager, Pinnacle Mechanical, Texas

“We’ve ordered over 300 dual plate check valves across three projects. The consistency in quality and the fast lead times (8-10 weeks) make Thriveon our go-to for wafer check valves. Plus, the engineering team responds within hours.”

Luca Bianchi
Maintenance Superintendent, Italgas, Italy

“We use Thriveon dual check valves on our gas distribution skids. The NACE compliance and Viton® seats handle sour gas perfectly. Zero fugitive emissions after 18 months – impressive.”

Frequently Asked Questions About Dual Check Valves

What is a dual check valve and how does it differ from a single check valve?

A dual check valve (also called dual plate check valve) features two spring-loaded discs that close independently against a central seat. It provides faster closing, lower pressure drop, and better backflow prevention than a single swing or lift check valve. The dual design also reduces water hammer and allows installation in both horizontal and vertical lines.

Can dual check valves be used for potable water? Do they meet WRAS / NSF 61?

Yes. Our dual check valves with EPDM seats are WRAS approved (UK) and comply with NSF/ANSI 61 for potable water. We provide a WRAS certificate with every potable water order. For US projects, we also offer models that meet ASSE 1024 and USC FCC requirements.

What is the typical lead time and minimum order quantity?

Standard lead time is 8–12 weeks for most sizes (DN50–DN300). Express service (4–6 weeks) is available for urgent orders. Minimum order quantity is 10 pieces per size for standard materials; lower MOQ possible for stock sizes. We ship via air, sea, or courier – all terms accepted (FOB, CIF, EXW).

Do you offer OEM / custom branding and packaging?

Absolutely. We provide full OEM/ODM service: custom body casting with your logo, branded nameplates, specific paint color (RAL), and export-grade plywood crate or pallet packaging with your company details. Engineering drawings are submitted for approval before production.

What certifications do your dual check valves carry?

Our valves are manufactured under ISO 9001:2015 certified quality system. We offer CE/PED, WRAS, UL/FM (selected models), RoHS, and API 598 testing. Material certificates per EN 10204 3.1 are included. NACE MR0175 / ISO 15156 compliance available for sour service.

How do I select the right dual check valve for my application?

Key selection factors: media type (water, oil, gas, chemical), pressure & temperature, pipe size and end connection (wafer, lug, flanged). Our engineering team can help with sizing calculations, spring selection (soft vs. hard), and material compatibility. Just share your line specs and we’ll provide a datasheet within 48 hours.

What is your payment terms and after-sales policy?

We accept T/T, L/C, Western Union (T/T preferred). Standard payment: 30% deposit, 70% before shipment. For repeat clients, open account terms can be discussed. All valves come with 12-month warranty against manufacturing defects. Our technical team provides remote support and can arrange site visits for large projects.

How do you manage logistics for US and Middle East delivery?

We ship from Tianjin / Qingdao ports with FOB, CIF, or DDP terms. For US customers, we have a bonded warehouse in Houston for faster distribution. Average sea freight to US Gulf ports is 22–28 days. All shipments are tracked and insured. We also handle customs documentation and can provide preferential origin certificates (Form A / CO).

🚀 Ready to Upgrade Your Check Valve Specification?

Get a custom dual check valve quote within 24 hours – including technical datasheet, drawing, and lead time.

📦 Limited-time offer: Free samples for qualified OEM projects (order 500+ pcs).

📩 Get Free Quote in 24h 💬 WhatsApp Sales ✉️ info@thriveonvalve.com

🔒 Your project data is confidential. Privacy policy available on request.

📞 Phone: +86-311-86935302 | Address: South of Huanmadian Village, Ningjin County, Xingtai, Hebei, China

Charles D. Thornton

Senior Valve Engineer & Head of International Technical Sales – Thriveon Valve

Charles has 19 years of experience in valve design and manufacturing, with a focus on check valve fluid dynamics and backflow prevention. He has led over 200 projects for municipal and industrial clients across the US, Europe, and the Middle East. He holds a B.Eng. in Mechanical Engineering from Hebei University of Technology and is a member of the Valve Manufacturers Association of China. Charles regularly contributes to Valve World and Pumps & Systems.

Still evaluating? Download our Dual Check Valve Technical Handbook (PDF) or browse the FAQ above.