Gas separation products and packaged systems built around MR membranes
Based in Hangzhou, China, Mairui supplies gas separation membrane modules, packaged membrane systems, and the filtration, drying and integration equipment around them.
Who We Are
Mairui's core team brings more than 20 years of experience in industrial gases and gas separation. We start with the gas composition, product specification and operating conditions, then define the membrane, process and equipment scope.
MR membrane modules sit at the center of our product range. Four module families cover nitrogen, oxygen enrichment, CO₂ separation and gas dehumidification, with packaged systems built around those separation duties.
What We Supply
| Product category | Product range | Primary purpose |
|---|---|---|
| MR Membrane Modules | MRN nitrogen, MRO oxygen enrichment, MRB CO2 separation and MRD gas dehumidification | Core separation elements supplied individually or assembled into membrane trains and packaged systems |
| Membrane Systems | Nitrogen generation, oxygen enrichment, biogas upgrading, CO2 removal and gas dehumidification | Integrated membrane trains, pretreatment, piping, analysis and controls |
| Filtration & Drying | Compressed-air filters, refrigerated dryers and desiccant dryers | Particulate, oil and moisture control for membrane protection or stand-alone air treatment |
| PSA Equipment | PSA nitrogen and PSA oxygen generators | On-site gas supply where adsorption is the appropriate separation route |
Our Products and Integrated Equipment
MR membrane modules are our core products. Filters and dryers support membrane pretreatment and stand-alone compressed-air treatment. Compressors, valves, gas analyzers, flowmeters, pressure and dew-point instruments, and PLC hardware are selected and integrated to suit the project.
Each proposal identifies the design basis, Mairui supply scope, integrated third-party equipment, site interfaces and available options.
How a Project Moves Forward
| Stage | Customer input or confirmation | Mairui work | Stage output |
|---|---|---|---|
| 1 - Design basis | Gas composition, flow, pressure, temperature, product target and end use | Check the data and confirm the separation route and design basis | Agreed design basis |
| 2 - Technical proposal | Site conditions, certification, interfaces and redundancy requirements | Size the membranes, calculate the process and define pretreatment and main equipment | Technical proposal, performance conditions and preliminary scope |
| 3 - Scope and commercial agreement | Supply scope, options, delivery schedule and trade terms | Define Mairui equipment, integrated third-party items, site interfaces, price and delivery boundary | Agreed technical and commercial basis |
| 4 - Build and factory inspection | Review drawings or key documents at agreed milestones, where applicable | Manufacture, integrate, commission controls and complete factory inspection within the contract scope | Equipment, inspection records and delivery documents |
| 5 - Delivery and start-up support | Site readiness, installation status and schedule | Provide installation and operating documents, guidance, and contracted remote or on-site support | Handover and continuing technical support |
Who We Work With
We work with industrial end users, EPC contractors, system integrators, equipment manufacturers and distribution partners. Cooperation may start with a single module, membrane sizing or pretreatment equipment, and extend to a complete membrane package.
Facility and Project Work
Mairui handles customer communication, process design, engineering coordination and project management from Hangzhou.
Discuss a product, project or partnership
If you are selecting membrane modules, planning a gas separation package or exploring local cooperation, tell us the product, application and current project stage.