In reverse osmosis water treatment systems, besides the core RO membrane elements, there is a key component that is often overlooked yet directly determines whether the whole system can operate safely and stably under pressure — the FRP membrane housing. As the core pressure vessel of RO systems, it arranges membrane elements in series and parallel, and realizes effective separation of product water and concentrate water. It is an indispensable piece of equipment for large‑scale water treatment projects.
There are three common materials for membrane housings on the market: food‑grade PP, stainless steel and FRP fiberglass. PP housings are mostly used for small water‑purification equipment. Stainless steel has certain requirements for water quality and working conditions. Thanks to its comprehensive performance advantages, FRP membrane housings are widely adopted in various medium‑ and large‑scale industrial water treatment and pure‑water production projects.
Hebei Chengda Water Treatment Technology Co., Ltd. was founded in 1976. With over 40‑year expertise in membrane housing manufacturing, the company owns registered trademarks including Winder®, Cenhon®, Arclion®, Winder‑G® and AOWY®. Our products have obtained multiple authoritative domestic and international certifications such as ASME, CE, AEO, ISO9001 and ISO14001.
The enterprise operates two major production bases covering more than 160 mu of land, enabling large‑scale and high‑efficiency manufacturing. The annual output reaches 1,000,000 membrane housings, equivalent to one housing produced every 3 minutes on average.
✨ Core Advantages of FRP Membrane Housings
???? Fully‑automatic Winding Molding with Outstanding Pressure‑bearing Performance
Chengda FRP membrane housings adopt computer‑controlled automatic winding technology, using epoxy resin and fiberglass as main raw materials for curing and forming. All products undergo 100% full inspection before delivery, with after‑sales defect rate lower than 1/10,000. They have passed more than 120,000 cycles of fatigue pressure test and burst test at over 6 times the working pressure. Compared with ordinary steel and plastic materials, our products deliver excellent performance in pressure resistance, temperature resistance and impact resistance. They support multiple pressure ratings from 300‑2000 PSI to meet application requirements of high‑pressure reverse osmosis systems under diverse working conditions.
???? Excellent Thermal Insulation to Minimize Ambient Temperature Interference
FRP features low thermal conductivity ranging from 0.15‑1.36 W/(m·K) at room temperature, providing far better thermal insulation than metal housings. It effectively isolates external temperature fluctuations and reduces the impact of temperature variation on membrane elements, ensuring stable water production performance of RO systems.
???? Corrosion Resistance & Lower Risk of Microbial Adhesion
The composite cured structure of fiberglass and epoxy resin offers superior chemical corrosion resistance. The smooth inner liner of the housing reduces microbial adhesion and growth. It is compatible with a wide pH range of 3‑11 and operating temperatures from ‑10℃ to 66℃. Resistant to medium corrosion during long‑term operation, it extends overall service life of equipment.
???? Comprehensive Range of Models for Diverse Project Requirements
Chengda Water Treatment Technology provides a complete model portfolio of membrane housings under multiple brands. Nominal diameters include 2.5‑inch, 4‑inch, 6‑inch, 8‑inch and 10‑inch. Port configurations are available in side‑port (S) and end‑port (E), and a single housing can hold 1 to 8 membrane elements.
Pressure ratings cover 300PSI, 450PSI, 600PSI, 1000PSI, 1200PSI, 1500PSI, 1800PSI and 2000PSI, compatible with reverse osmosis equipment of different water production capacities. OEM customization service is also supported. Details such as port orientation, dimensions and housing color can be adjusted according to project requirements. Nearly 50% of models are in stock for fast response to project inquiries and deliveries.
???? Final Remarks
A stable reverse osmosis system relies not only on the performance of membrane elements, but also heavily on the quality of pressure vessels. With combined advantages of pressure resistance, corrosion resistance and thermal insulation, FRP membrane housings stand as the preferred choice for medium‑ and large‑scale water‑treatment projects.
Backed by more than 40 years of manufacturing experience, Chengda Water Treatment implements a comprehensive quality‑control system to deliver reliable membrane housings and supporting solutions for water‑treatment projects across various industries.
