4-inch side-connected fiberglass reinforced plastic (FRP) RO membrane housing is made of high-strength glass fiber reinforced plastic (FRP), featuring excellent pressure resistance and corrosion resistance. Its core side-port design places the raw water and concentrated water interfaces on the side of the cylinder, providing great flexibility and freedom for the system piping layout, especially suitable for parallel installation of multiple membrane housings and compact rack-mounted integration. The housing can stably withstand working pressures ranging from 300 PSI to 1200 PSI, compatible with 1 to 4 standard 4-inch reverse osmosis membrane elements, and is an ideal pressure vessel solution for commercial water purification systems, small-scale industrial desalination, material separation, and other high-standard fluid processing applications that require complex piping layouts.
The common type is 1″ internal thread (the specific size can be customized according to the model), and the material is usually stainless steel or alloy.
Main material
Fiber-reinforced plastic (FRP)
End plate / Fastener
Stainless steel or alloy
Application fields
Commercial drinking water systems, small-scale industrial reverse osmosis equipment, material separation, brackish water desalination, etc.
【Product Overview】
This product is a 4-inch side port type FRP (Fiber Reinforced Plastic) reverse osmosis pressure vessel, specifically designed for commercial and small industrial RO systems that require flexible pipeline layout. Its core feature is that the raw water and concentrated water interfaces are located on the side of the cylinder, providing greater freedom and convenience for system design and pipeline connection. The shell is made of high-strength fiberglass wound material, capable of accommodating 1 to 4 standard 4-inch RO or NF membrane elements, and offers multiple pressure ratings from 300 PSI to 1200 PSI, meeting a wide range of demands from conventional purification to some high-pressure applications.
【Product Features and Advantages】
Flexible pipe arrangement: The unique side connection design allows the inlet and outlet pipes to be connected from the side, greatly optimizing the internal space layout of the equipment. It is particularly suitable for systems with multiple membrane housing units in parallel or in space-limited integration.
Wide pressure range: It offers a complete pressure sequence from 300 PSI to 1200 PSI, allowing users to precisely select the model based on the raw water quality and system design pressure, balancing efficiency and economy.
Convenient maintenance: The end cover adopts a standardized design and can be quickly opened with a dedicated tool, facilitating the installation, inspection and replacement of membrane elements.
Durable and reliable: FRP material features excellent corrosion resistance, high pressure tolerance and fatigue resistance, ensuring the safety and stability of pressure vessels during long-term continuous operation.
High cost performance: It offers market-competitive costs while ensuring industrial-grade reliability, making it an ideal choice for medium-sized projects.
【Typical Application Scenarios】
Small and medium-sized commercial reverse osmosis systems for direct drinking water in schools, office buildings and hotels
Water treatment for process water in the food and beverage processing and dairy industries
The pretreatment section of small-scale ultrapure water equipment for the pharmaceutical and electronics industries
Small-scale seawater desalination devices or experimental platforms
All kinds of industrial fluid separation systems that require flexible pipeline layout
