Explore our premium range of industrial valves, manufactured under strict quality standards to guarantee long-term performance and reliability in heavy-duty pipe grids.
In municipal water transmission, sewage mains, and high-pressure manufacturing pipelines, the unseen enemy of pipeline integrity is entrapped air. When pipelines are filled, large columns of air must be rapidly evacuated to prevent pockets from causing flow blockages. Conversely, when pipelines are drained or sudden pressure drops occur, air must enter instantly to prevent catastrophic column separation and line collapses due to vacuum sub-pressure.
Double port air evacuation valves (also known as dual-orifice or double-orifice air valves) integrate two discrete venting ports into a single, unified body structure: a large kinetic orifice and a small automatic orifice. This combination delivers comprehensive system safety by executing three main operations: bulk air release during filling, vacuum relief during drainage or transient drops, and continuous micro-degassing of dissolved gases under high operating pressures.
Engineering Insight: Without dynamic double-port air valves, fluid friction losses can spike by up to 30%, and transient shocks (water hammer) are 4x more likely to rupture standard ductile iron pipelines.
Providing customized air management systems across various industrial verticals. From municipal drinking water systems to complex chemical processing networks, our valves guarantee smooth fluid flow.
Installed at topographical high points along transmission mains. Optimizes water delivery speed, stabilizes energy consumption, and completely avoids localized negative pressure voids during emergency pump shutdowns.
Engineered with elongated bodies and specialized sloped designs. Helps prevent corrosive gas pockets (such as hydrogen sulfide) from collecting, maintaining clean operations and avoiding system blockage.
For reverse osmosis structures exposed to high salinity. Built using CF8, CF8M, or duplex stainless steels. The double port layout provides robust corrosion resistance and consistent pressure regulation.
Designed for major power plant penstocks. Prevents negative pressure collapses when turbine control valves shut down, balancing mass intake rates during critical flow situations.
Understanding the standard mechanical boundaries and operating criteria of our double-port venting systems. High pressure tolerances designed for extreme environments.
At KR Valve, we constantly innovate to meet the challenges of next-generation digital smart fluid infrastructure.
Developing telemetry-enabled air valves that transmit pressure changes, water level heights, and venting metrics back to central SCADA systems in real-time.
Innovative internal geometries that dampen float velocity during sudden high-flow releases. This feature helps eliminate secondary pressure surges caused by rapid closures.
Adopting bio-based, zero-VOC powder epoxies that offer superior resistance to chemicals and aggressive media, while meeting global potable water standards like WRAS.
Our modern manufacturing facility utilizes automated casting lines, CNC machining stations, and ERP-controlled workflows. This enables us to consistently maintain structural tolerances while maintaining competitive production schedules.
Through robust raw material sourcing, automated inventory management, and integrated manufacturing lines, we shield our clients from shipping delays and market volatility. We offer reliable OEM delivery times and transparent cost management.
Supply Chain Standard: All raw castings undergo chemical composition spectrometry and physical stress analysis before machining, ensuring compliance with international ASTM and EN specifications.
Our systematic workflow ensures that every valve conforms to design parameters and arrives at your facility on time.
Our dedicated R&D department drives continuous product development. Utilizing modern testing labs, our engineers constantly improve flow geometry and overall structural reliability.
Operating under ISO-9001 quality guidelines, we use over 30 specialized production machines. Our inventory schedules are updated monthly to ensure prompt order fulfillment.
Our testing department checks 100% of finished valves. We perform hydrostatic tests on the shell and seat, verifying dimensional tolerances and appearance to guarantee zero-leakage performance.
KR possesses over 20 years of experience manufacturing standard and non-standard industrial valves. We supply an extensive range of over 500 valve designs, including butterfly, gate, check, and water control valves, along with complementary pipe accessories.
We believe in establishing collaborative partnerships with our clients. By focusing on both product quality and reliable technical support, we help secure long-term success for global engineering networks.
Today, our products are exported to over 50 countries and regions in Europe, Asia, Africa, and Oceania. We look forward to cooperating with your team and providing robust flow control solutions for your next project.
A comprehensive overview of the manufacturing capabilities, logistics support, and quality controls that support the KR brand.
We manufacture under our independent KR brand and provide comprehensive OEM services, establishing long-term partnerships with leading engineering firms.
Our workshop is equipped with 15 machining stations and dedicated assembly lines, operated by experienced technical specialists.
We manage 20 distinct valve series encompassing over 500 individual models. We supply international standard valves as well as custom fabrications.
By managing our manufacturing processes directly, from casting inspection to assembly, we optimize costs while maintaining high quality.
We provide professional consulting services during both pre-sales planning and post-installation support to keep your pipelines running smoothly.
Get a direct look at our manufacturing facility, assembly lines, and high-pressure test stands.
Evaluating design standards, material certifications, and key indicators to simplify your sourcing process.
When sourcing double-port air evacuation valves for large-scale infrastructure, global engineering firms prioritize compatibility, safety certifications, and supply chain transparency:
Our products are deployed in critical municipal, chemical, and energy projects worldwide.
KR supplied a complete package of specialized water control valves to assist with high-pressure reservoir management in Chile.
Delivered large-bore butterfly and check valves to support municipal drinking water distribution networks in Italy.
Supplied resilient gate and butterfly valves to handle corrosive industrial sludge and wastewater treatment processes.
Provided corrosion-resistant flow control valves to ensure safe operation in highly acidic chemical environments.
Supplied heavy-duty ball and gate valves to maintain reliable sealing in low-temperature gas pipelines.
Provided automated hydraulic control valves to regulate fluid levels and flow distribution in sewage treatment reservoirs.
A comprehensive portfolio of flow control equipment engineered to meet international specifications.
Includes concentric wafer, lugged, and double-eccentric models. Features durable vulcanized seats, low operational torque, and reliable isolation performance.
Resilient-seated gate designs (DIN F4/F5, BS5163) and metal-seated sluice valves. Engineered with smooth waterways to minimize pressure drops.
Dual-plate wafer designs, swing check configurations, and ball-type non-return valves. Provides fast closure to prevent backflow and water hammer.
Diaphragm-operated hydraulic control systems, including pressure reducing (200X), float control (100X), and quick-closing relief valves.
Common technical questions answered by our engineering specialists to assist with planning your system layout.
A single-port valve generally targets one main task: either venting large volumes of air during pipe filling or slowly releasing micro-air pockets during operation. A double port air valve combines both functions, employing a large kinetic orifice for bulk air intake/exhaust and a small automatic orifice for continuous micro-venting under operating pressures.
They should be installed at local high points, points of slope transition, at regular spacing along long flat pipeline sections (typically every 500 to 1000 meters), and near system pumps or isolation valves.
We use precision-machined, lightweight float assemblies coated in resilient EPDM rubber. As liquid fills the valve chamber, the float rises to seal securely against the EPDM seat, maintaining zero-leakage performance.
Yes, but standard clean-water air valves are prone to clogging in sewage applications. Wastewater projects require our specialized wastewater air valves, which feature elongated bodies and sloped profiles to prevent solids from contacting the sealing seat.
For marine or high-salinity applications, we provide valve bodies cast in CF8 (SS304), CF8M (SS316), or duplex stainless steels, which offer excellent resistance to aggressive media and corrosion.
Standard sizes (DN50 to DN300) are typically dispatched within 30 to 45 days. Lead times for custom configurations depend on material requirements and casting availability, which are coordinated during project planning.
Yes, every valve order is shipped with detailed material test reports (MTR) and hydrostatic test certifications confirming compliance with EN 1074-4 and ISO 5208.
If a pump stops or a pipe breaks, the water inside flows downhill quickly, creating a vacuum. The kinetic float drops immediately, opening a large passage that pulls in outside air to equalize pressure and protect the pipe structure.
Explore more industrial flow control components manufactured to global specifications for fluid grid security.
KR VAVLE
