From air release to vacuum breaker valves — discover which types of air valves your industrial water and wastewater system needs. Reduce downtime, eliminate air pockets, and lower maintenance costs with expert guidance from China's trusted valve manufacturer.
Every day, plant engineers and operations managers face the same silent threat: air in pipelines. Trapped air causes pressure surges, reduces flow efficiency, damages seals, and accelerates pipe corrosion. In the US industrial sector, air-related pipeline issues account for an estimated 18–23% of unscheduled maintenance events — costing facilities millions in lost productivity.
Air pockets collapse under pressure, creating shockwaves that can rupture pipes and damage valves. Typical repair cost per incident: $4,000–$15,000.
Just 2% entrained air can reduce pipeline flow by 10–15%, forcing pumps to work harder and consume more energy.
Air accelerates oxidation and corrosion in steel pipes, cutting equipment lifespan by 30–40% in some cases.
Many suppliers lack US-compliant certifications, leading to customs delays and re-shipping expenses. Reliable factory-direct sourcing eliminates this risk.
The solution? Selecting the correct types of air valves for your specific application — and partnering with a manufacturer who understands international standards, fast delivery, and quality assurance.
Air valves are automatic devices designed to release or admit air during pipeline filling, draining, and normal operation. Choosing the wrong type leads to the pain points above. Below are the most common types of air valves used in water, wastewater, irrigation, and industrial systems:
| Valve Type | Primary Function | Typical Application | Key Feature |
|---|---|---|---|
| Air Release Valve (ARV) | Releases small amounts of accumulated air under pressure | Water distribution, high-point venting | Continuous automatic operation |
| Air & Vacuum Valve (AVV) | Admits large volumes of air during draining; releases air during filling | Pipeline filling/draining, pump stations | High flow capacity, protects against vacuum |
| Combination Air Valve (CAV) | Combines ARV + AVV functions in one unit | Main transmission lines, sewage systems | Versatile, space-saving, 2-in-1 design |
| Vacuum Breaker Valve | Prevents vacuum collapse by admitting air | Hot water systems, steam lines, tank protection | Quick opening, prevents siphonage |
| Sewage Air Valve | Handles wastewater with solids; self-cleaning | Wastewater collection, treatment plants | Anti-clog design, corrosion-resistant |
| Stainless Steel Air Valve | Corrosion-resistant air release for aggressive media | Chemical, food & beverage, pharmaceutical | 316/304 SS, FDA-compliant options |
Each type of air valve serves a distinct purpose. At Ningjin Thriveon Valve Co., Ltd., we manufacture all major air valve types in ductile iron, cast steel, stainless steel (304/316), and bronze — with trim options tailored to your media and pressure requirements.
We don't just make valves. We engineer reliable air management solutions for demanding applications across the United States, Saudi Arabia, South Africa, Italy and beyond. Here's what sets us apart:
Our 25,000m² facility runs 6 production lines with CNC machining, automatic coating, and 100% pressure testing. You buy factory-direct — no middlemen, no markup.
All air valves are tested to ISO 9001, CE/PED, and API 598 standards. We offer third-party inspection (SGS, BV, TÜV) at your request. Zero-defect policy on all export orders.
Need custom flanges, special coatings, or unique pressure ratings? Our 10+ senior engineers deliver custom air valve designs in 7–15 days — with full CAD and 3D model support.
Standard 15–25 day lead time. Express production available for urgent orders. We stock popular sizes (DN50–DN300) for same-week dispatch to US ports (Los Angeles, Houston, New York).
All valves carry ISO 9001, CE, and RoHS certification. We also provide NSF/ANSI 61 compliance for drinking water applications upon request. Full traceability documentation included.
Our team includes bilingual engineers with over a decade of valve design experience. Get answers to technical questions within 2 hours.
Use the reference table below to match the right air valve type to your operating conditions. All specifications are based on Thriveon Valve standard products — custom ranges available on request.
| Parameter | Air Release Valve | Air & Vacuum Valve | Combination Air Valve | Vacuum Breaker |
|---|---|---|---|---|
| Size Range | DN15 – DN50 | DN50 – DN400 | DN50 – DN300 | DN20 – DN150 |
| Pressure Rating | PN10 / PN16 / Class 150 | PN10 / PN16 / Class 150–300 | PN10 / PN16 / Class 150 | PN10 / PN16 / Class 150 |
| Body Material | Ductile iron / SS304 / SS316 | Ductile iron / Cast steel | Ductile iron / SS304 | Ductile iron / Bronze |
| Trim Material | SS316 / Brass | SS304 / SS316 | SS304 / SS316 | SS304 / Brass |
| Temperature Range | 0°C – 80°C (optional to 120°C) | 0°C – 90°C | 0°C – 90°C | 0°C – 110°C |
| Connection | Threaded (BSP/NPT) / Flanged | Flanged (ANSI/DIN/JIS) | Flanged (ANSI/DIN) | Threaded / Flanged |
| Certifications | ISO 9001, CE, RoHS | ISO 9001, CE, RoHS, API 598 | ISO 9001, CE, RoHS, API 598 | ISO 9001, CE, RoHS |
types of valves valves types types of valves and applications
💡 Tip: For potable water systems in the US, always specify NSF/ANSI 61 certification on your air valves. Thriveon offers this as a verified add-on for all ductile iron and stainless steel models.
The three primary types of air valves are: Air Release Valves (for venting small air pockets under pressure), Air & Vacuum Valves (for large air volumes during filling/draining), and Combination Air Valves (which perform both functions). Thriveon manufactures all three in ductile iron, cast steel, and stainless steel.
Size selection depends on pipeline diameter, flow rate, operating pressure, and air volume to be vented. A general rule: for DN200–DN400 pipelines, a DN50–DN80 combination air valve is typical. Our engineering team provides free sizing calculations — just send your pipe parameters and we'll recommend the optimal model.
Absolutely. We regularly produce air valves with ANSI B16.5 Class 150 and Class 300 flanges (raised face and flat face). We also offer NPT threaded connections on smaller sizes. All US-bound orders include full dimensional and material traceability reports.
All Thriveon air valves are manufactured under ISO 9001:2015 certified quality management. We also offer CE/PED, RoHS, API 598, and NSF/ANSI 61 (for potable water) certifications. Third-party inspection by SGS, BV, or TÜV can be arranged at your cost.
Free samples (1–2 pcs, DN15–DN50) are available for qualified buyers. You pay only shipping. Standard sample lead time: 5–7 working days. Bulk orders ship in 15–25 working days. We ship via sea (FOB Tianjin or CIF to US ports) or air express if needed.
Yes. Our OEM/ODM team has completed over 200 custom projects. We can modify flange drilling, stem length, coating type (epoxy, nylon, FBE), and elastomer materials (EPDM, NBR, Viton®). Send your drawing or specification for a rapid quote.
All air valves carry a 12-month warranty from date of shipment, covering manufacturing defects in materials and workmanship. We also provide extended warranty options (24–36 months) for critical infrastructure projects. Claims are processed within 72 hours.
Visit our contact page, email us at info@thriveonvalve.com, or call +86-311-86935302. We respond to all inquiries within 24 hours. Please provide your desired valve type, size, quantity, pressure rating, and target port.
"Reliable air release valves — exactly as specified."
"We ordered 120 DN40 air release valves for a municipal project in Florida. The quality control is impressive — every valve was cleanly cast, the threads were perfect, and the EPDM seals seated well. Will definitely reorder."
— Michael T., Miami, FL | Water Utility Contractor
"Custom combination valves saved our design."
"Thriveon helped us design a custom combination air valve with a shorter overall height to fit inside a valve vault. Their engineering team turned around the 3D model in 4 days. The valves arrived in 3 weeks and performed perfectly during commissioning."
— Dave R., Houston, TX | Consulting Engineer
"Great value for the quality — fast shipping to Johannesburg."
"We compared quotes from three Chinese manufacturers. Thriveon wasn't the cheapest, but their communication and willingness to provide full material certs won us over. The valves met our SANS standards, and shipping via Durban port was smooth."
— Pieter v., Johannesburg, South Africa | Irrigation Project Manager
"NSF-certified air valves for US drinking water system."
"Finding NSF/ANSI 61 certified air valves from a Chinese supplier was a challenge until we found Thriveon. They provided all the documentation, and the valves passed our local health department inspection without issues. Highly recommended for US waterworks."
— Jennifer L., Denver, CO | Water Quality Specialist
David Chen
Senior Valve Application Engineer | Thriveon Valve Co., Ltd.
With 14 years in industrial valve design and international project support, David has helped engineering firms across North America, the Middle East, and Africa select and customize air valves for water, wastewater, and process applications. He holds a B.Eng. in Mechanical Engineering and regularly contributes to valve standards discussions.
Stop overpaying for inconsistent quality. Get factory-direct pricing, certified products, and delivery you can rely on.
🎯 Limited-time: Free sample (DN25–DN50) for first-time US buyers — pay only shipping. *Terms apply.
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+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
Trusted by Industrial Buyers Across 4 Continents
Thriveon Valve has supplied 8,000+ air valves to customers in the United States, Saudi Arabia, South Africa, Italy, and more. Our quality speaks for itself.
"We switched our air valve supply to Thriveon for a large water distribution project in Texas. The combination air valves arrived 2 weeks early, and every unit passed our hydrostatic test. Zero failures in 18 months."
— John M., Project Manager, Texas Municipal Water District
"Thriveon's OEM team redesigned our vacuum breaker valve to fit a tight manifold layout. We saved 37% on installation cost and the valves have been running flawlessly on our chemical feed lines."
— Sarah L., Process Engineer, Atlanta Chemical Processing
"As a distributor, I need reliable suppliers. Thriveon delivers consistent quality on air release and combo valves. Their ISO 9001 and CE certs make customs clearance smooth every time."
— Ahmed R., Procurement Manager, Saudi Arabia Water Equipment Trading