Features
Model, compatibility, and delivery documents
Define application conditions and responsibilities
Keep document versions and unresolved items
Applications
Specifications
| Requirement details | Raw water, intended use, demand, and site conditions |
|---|---|
| Implementation and acceptance | Based on applicable requirements and the confirmed scope |
Start with your requirements
Check membranes, cartridges, resins, and other categories against the full model designation, intended use, and operating conditions. Confirm available models, quantities, product source, and delivery schedules for each inquiry.
Provide the project city, intended use, equipment or consumable information, and available documents. Record daily demand separately from peak demand. Relevant technical staff should check missing conditions; the appearance of water or a place name alone cannot determine a system design.
Confirm the scope and responsibilities
Confirm the responsible parties, conditions, fees, and timing separately for supply, transport, installation and commissioning, testing, and ongoing management. Remote document discussions cannot replace all site work. Listing a region does not mean there is a local branch. The manufacturer, permits, or authorizations must match the specific model and documents.
Resources for the next step
Purchasing and Maintenance Knowledge Center
Prepared with AI assistance. This page supports document-based consultation; it does not guarantee water quality, financial returns, or service response times.
Further information to prepare
Confirm compatibility, source, storage, and maintenance for filter bags, membranes, resins, and filter media using specific model documents. Confirm supply, installation, and site services against the actual conditions of this project.
Matching dimensions address only part of compatibility
Membrane elements, filter cartridges, filter bags, resins and instruments require different purchasing information. Use complete model numbers and the original equipment documentation to establish connections, then check materials, operating ranges and required performance. State whether the order is for the original model or an approved substitute, and retain the confirmation record.
| Item | Check together | Insufficient on its own |
|---|---|---|
| RO membrane elements | Model, pressure vessel, connections and seals, feedwater data and operating documentation | Outside diameter, length or the tested output of a single element |
| Filter cartridges / filter bags | Length, connection, material, seals, definition of the filtration rating and permitted operating conditions | The same nominal size in inches or nominal filtration rating |
| Filter media / resins | Application, grading or resin type, vessel, distribution system, loading and maintenance documentation | The name on the packaging or a similar-looking vessel |
| Conductivity / pH instruments | Probe model, measuring range, process connection, power supply, output and calibration documentation | The display panel or the name of the measured parameter |
Check the signal chain before replacing an instrument
Measurement involves the probe, transmitter or display unit, and control system. When replacing an instrument, check the cell constant or probe type, measuring range and units, temperature compensation, output signal and power supply against the specific model. Retain calibration and installation-location records; similar displayed readings alone do not establish compatibility.
You may request a quotation before all information is available, but list missing details as pending confirmation. Without complete model information, operating documentation or sourcing evidence, do not claim universal compatibility, guaranteed genuine imports or a fixed replacement interval.
Related resources and next steps
Sources and scope
Drafted with AI assistance on 8 October 2026 and checked item by item against the knowledge base and the public sources below. Manufacturer information explains the relevant technology; it does not imply that Gudian is an authorized distributor or manufacturer for that brand. Equipment specifications are subject to the selected model and confirmed documents.
Replacement supplies across Yunnan: match the delivery list to the existing equipment
Put the equipment location, complete old-part model, quantity and units on the same purchasing list. Confirm membrane-housing interfaces, cartridge or bag seals, materials and operating limits, then list packaging, storage and delivery dates. Agree on consumable supply and on-site replacement separately. A city name or “Yunnan stock” must not imply unverified inventory or local service outlets.
Review thin-wall stainless-steel piping separately by outside diameter, wall thickness, connection system and transition interfaces; it does not use the same compatibility criteria as RO membranes or cartridges. Customers can enter the guide for their project area and then return to the relevant product or purchasing guide.
Membrane, cartridge and resin purchasing records · Thin-wall stainless-steel piping and fittings · Handover guides for Yunnan’s 16 areas
