Single Orifice Air Valve – China Manufacturer & Supplier

Premium Quality Single Orifice Air Valves from China

As a professional China single orifice air valve manufacturer, Yuanjd Valve specializes in the design, production, and supply of high-performance single orifice air valves for a wide range of pipeline applications. Our single orifice air valves are engineered to serve as the “respirator” of piping systems —automatically releasing accumulated air and gases from pressurized pipelines during normal operation to prevent air pockets, airlocks, and flow disruptions that can compromise system efficiency and damage critical equipment.

A single orifice air valve, as the name suggests, features a single opening (orifice) through which air or gases are released from the pipeline. These valves are commonly used in pipelines that carry liquids and are designed to release air or gas pockets that accumulate at high points in the system. As air from the pipeline enters the valve, it displaces the water, allowing the float to drop; the air is then released into the atmosphere through a small orifice. When water returns to the valve body, the buoyancy of the float lifts it to the valve seat, ensuring a tight seal.

Single Orifice vs Double Orifice Air Valve

Understanding the difference between single and double orifice air valves is essential for proper system design:

Single orifice air valves are the preferred choice for simpler systems where air accumulation occurs primarily at high points in the pipeline. Double orifice air valves are better suited for more complex systems requiring air release at multiple points.

Technical Specifications

Our single orifice air valves are manufactured in strict accordance with leading international standards:

• Design Standards: AWWA C512, BS EN 1074-4

• Flange Standards: BS EN 1092-2 PN10, PN16

• Testing Standards: EN 12266

• Working Pressure: 10 bar / 16 bar

• Working Temperature: 0°C to 100°C

• Size Range: DN50 to DN300

• Body Materials: Ductile iron (BS EN 1563 EN-GJS 500/7), cast iron

• Float Material: Stainless steel (316)

• Sealing: Elastic seat with NBR gasket

Key Features:

• Single chamber valve with float that dissipates small air flow

• Lightweight and compact design

• Unconditionally guaranteed stainless steel float

• 316 stainless steel interior components

• Elastic seat ensures active closing

• Non-clogging design eliminates backwashing

• Maintains system process efficiency

• Releases excess air pockets during system operation

• Protects the system from air-related surges

Applications & Industries

Single orifice air valves are installed at pipeline high points where gases accumulate due to having a lower density than fluids. They are widely used across multiple sectors:

• Water Distribution Networks – Municipal water supply systems, long-distance transmission pipelines

• Wastewater Pipelines – Sewage force mains, treatment facilities

• Irrigation Systems – Agricultural and landscape irrigation networks

• HVAC Systems – Heating and cooling water systems

• Industrial Processing – Chemical, petrochemical, and manufacturing fluid systems

• Pump Systems – Protecting pumps from air accumulation and cavitation

Why Choose Yuanjd Valve as Your China Single Orifice Air Valve Manufacturer?

At Yuanjd Valve, we combine decades of manufacturing expertise with advanced production facilities and rigorous quality control systems. As a leading China single orifice air valve supplier, we are committed to delivering products that meet international quality standards while offering competitive factory-direct pricing.

The global Single Orifice Air Valves Market was valued at approximately USD 0.45 billion in 2024 and is projected to reach USD 0.85 billion by 2034, registering a CAGR of 6.8%. China remains the world‘s leading manufacturer of air valves, with specialized manufacturing clusters offering unrivaled advantages in cost, scale, and technological advancement. Yuanjd Valve leverages this ecosystem to provide our global clients with high-quality products at competitive prices—backed by reliable delivery and responsive after-sales support.

Our single orifice air valves feature:

• AWWA C512 and EN 1074-4 compliant design

• 316 stainless steel float and interior components for superior corrosion resistance

• Ductile iron body for durability and longevity

• Non-clogging design for trouble-free operation in clean water applications

• ISO 9001:2015 certification – Quality management systems

• CE marking – Compliance with European market requirements

OEM & Customization Services

We offer comprehensive OEM and customization services, allowing you to specify materials, sizes, pressure ratings, end connections, and certifications that precisely match your industrial requirements. Whether you need flanged or threaded connections, ductile iron or stainless steel bodies, or specialized designs for potable water applications—our engineering team can deliver tailored solutions for your specific project needs.

Contact Us

Partner with a reliable single orifice air valve manufacturer in China. Contact Yuanjd Valve today for product inquiries, technical support, or to request a quote. Our experienced team is ready to assist you with professional guidance and prompt service.