Explore our precision-manufactured OEM valves, designed for severe duty applications, high structural resilience, and absolute pressure integrity.
Within pressurized liquid pipelines, the presence of entrained air is an inevitability that poses significant threats to operational efficiency and structural integrity. Entrained air pockets can severely restrict flow capacity, increase head losses, stimulate internal pipe corrosion, and worse, accelerate transient pressure spikes that culminate in catastrophic line bursts. For this reason, professional pipeline operators require high-performance, dynamic air relief mechanisms.
As a leading OEM air valve supplier & manufacturer, KR Valve Group designs and engineers solutions that address the specific physics of pipeline air kinetics. Our range of air release valves, air/vacuum valves, and combination air valves are engineered to dynamically exhaust air during pipeline filling, admit volume-matching air during draining to prevent vacuum collapse, and continuously release micro-bubbles under pressurized operation.
Sourcing pipeline infrastructure from China provides global enterprises with a unique combination of metallurgical expertise, high-capacity machinery, and supply chain synergy.
Our proximity to premium domestic casting foundries allows us to source high-grade Ductile Iron (GGG40/50), Carbon Steel (WCB), and Stainless Steel (CF8/CF8M) raw materials with verified chemical compositions and mechanical characteristics.
We deploy over 15 industrial CNC machining centers to process complex valve body designs and finish internal seats with dimensional tolerances down to the micron level, ensuring zero-leakage performance under extreme pressures.
Our production protocols are aligned with ISO 9001, API, EN, BS, and DIN standards. This makes our OEM products fully compatible with international engineering requirements, eliminating friction during local pipeline installations.
From custom modeling to standard-compliant testing, we strictly oversee every stage of the manufacturing process.
Our dedicated R&D department leverages Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) modeling to analyze internal flow velocities, pressure distribution, and transient air behavior. This optimizes the kinetic geometry of our air valves to prevent premature closing during high-velocity air exhaust.
We operate over 30 modern production equipment units, including advanced horizontal lathes, vertical boring mills, and automated electrostatic powder coating lines. We apply a minimum 250-micron fusion-bonded epoxy (FBE) coating to ensure supreme corrosion resistance in submerged and underground services.
"Zero Leakage" is our operating philosophy. According to EN 12266-1 and API 598 standards, every single air valve and flow control unit undergoes shell pressure and low-pressure seat testing before leaving our loading docks. We verify float buoyancy, shell integrity, and seal tightness.
KR Valve products are trusted in diverse environments, from deep-well municipal water networks to complex industrial chemical lines.
In municipal clean water transmission networks, combination air valves are placed at structural peaks to exhaust accumulated air pockets. For aggressive seawater desalination processes, we utilize custom alloys like duplex stainless steel and fully PTFE-lined body options to eliminate galvanic corrosion.
Air valves designed for wastewater applications feature elongated bodies and conical bases. This design keeps the fluid level far below the sealing mechanism, preventing solid organic matter, sludge, and debris from clogging the orifice and causing persistent leakage.
For systems handling highly acidic solutions, organic solvents, or chemical gases, we supply PTFE-lined butterfly and ball valves. These valves resist chemical degradation while maintaining critical tight shut-off safety measures.
| Valve Type | Common Materials Offered | Nominal Diameter (DN) | Pressure Rating (PN) | Compliance Standards |
|---|---|---|---|---|
| Combination Air Valve | Ductile Iron (GGG50), Stainless Steel (304/316) | DN25 - DN300 | PN10 / PN16 / PN25 | EN 1074-4, AWWA C512 |
| High-Speed Release Exhaust Valve | Ductile Iron (GGG40), Cast Iron (GG25) | DN50 - DN200 | PN10 / PN16 | DIN 3202, BS 5153 |
| Corrosion Resistant PTFE Valve | CF8 / CF8M Body with Pure PTFE Lining | DN40 - DN600 | Class 150, PN10 / PN16 | API 609, ASME B16.34 |
| Y-Type Pipeline Strainers | SS304, SS316, Carbon Steel (WCB) | DN15 - DN400 | 150LB - 300LB, PN16 - PN40 | ASME B16.34, API 598 |
Proof of KR Valve’s reliable engineering footprint across municipal, industrial, and energy infrastructure projects worldwide.
We supplied high-pressure water control valves and kinetic combination air valves to secure long-distance raw water pipelines against sudden column separations and transient pressures.
Our team provided DN1200 double eccentric butterfly valves and non-slam check valves designed for municipal distribution loops, lowering pumping head losses and increasing system efficiency.
We manufactured heavy-duty gate valves and non-clogging sludge air release valves featuring extended vertical necks, ensuring clean operation and easy inline maintenance.
We supplied PTFE-lined butterfly and ball valves to handle highly corrosive industrial effluents, preventing toxic atmospheric emissions and ensuring environmental compliance.
We produced low-temperature impact tested cast steel gate valves and high-integrity ball valves designed to handle high pressures in harsh gas transport lines.
We supplied sewage-rated air release valves and resilient-seated gate valves to handle municipal wastewater flows, maintaining clean operations in residential piping networks.
Take a virtual tour of our modern production lines and witness our pressure testing and packaging procedures.
Get answers to common technical queries about air valves, pipeline engineering, and custom OEM processes.
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