The non-standard customized design and manufacturing of ultrafiltration pipelines are completed in-house (not outsourced). The ultrafiltration membranes are independently produced by Chengrong, a capability that is among the few in the industry.

Chengrong factory undertakes in-house non-standard customized design and manufacturing of ultrafiltration pipes, and independently produces ultrafiltration membranes, an integrated capability that is rarely seen in the industry.

Both pipes and plates are made of food-grade 304 stainless steel. We strictly verify the material certificates provided by suppliers, and 100% conduct random sampling inspections before warehousing.

The stainless steel materials undergo a series of rigorous tests, including salt spray test, hardness test, surface finish test, roundness test, and tensile test. The scope of our testing items far exceeds that of competing manufacturers. 

All screws and nuts use international first-tier brands as standard, unless specified otherwise by the customer. Even for customized requests, the minimum quality standard is guaranteed to meet that of domestic first-tier brands. 

All O-rings use international first-tier brands as standard, unless specified otherwise by the customer. Even for customized requirements, the minimum quality standard will be aligned with that of domestic first-tier brands.

When it comes to PVDF-lined PVC alloy ultrafiltration membranes, Chengrong factory is likely the only manufacturer in China that matches, or even surpasses, international first-tier brands.

From design and manufacturing to the assembly of complete sets, all processes are completed in Chengrong’s own factory (no outsourcing involved). This ensures reliable lead times, so you can rest assured. 

We never cut corners, take shortcuts, or shirk responsibilities in invisible details, and this commitment can be included in the contract terms. 

All supporting outsourced components, including displays, PLC control cabinets, and electrical parts, adopt domestic and international first-tier brands.  

We provide after-sales service with the following commitments: 20-minute response, 2-hour solution proposal, and on-site support within 2 days. Special circumstances will be discussed and handled through mutual negotiation.

Under the same operating conditions, its hourly water flux exceeds the industry average by over 40%, a fact that has long been widely recognized across the industry.

The PVC spinneret features a one-hole-per-head design, with consistent outer diameter and uniform wall thickness, distinctly different from the "multi-hole-per-head" design adopted by competitor factories.

Spinning is Chengrong’s proprietary process and control system, resulting in membrane filaments with dense, uniform micro-pores and exceptional toughness that few competitors can match.

The ultrafiltration membrane adopts Chengrong's proprietary technology of secondary spiral stirring and constant-temperature bonding with A and B adhesives, which is no other manufacturer can match.

The raw material formula has undergone countless rounds of optimization and iteration, with ongoing R&D efforts to this day, an achievement that competitor factories cannot match.

In the pipeline ultrafiltration industry, Chengrong has ranked among the top three when comparing product quality, full supply chain, and management system development.

It is one of the few factories in China that owns a full supply chain covering R&D and production, mold and hardware manufacturing, and complete water purification equipment.

The company holds 3 invention patents, 8 software copyrights, 53 utility model patents, and 25 design patents.

With an annual R&D investment of over 3 million yuan dedicated to advancing process technology, structural design, and mold development, how many competitors can truly match this?

The management team has an average tenure of 8 years at the factory, while 80% of employees have served for 6 years—with many having worked here for over a decade. Working at Chengrong truly benefits every employee.