Our membrane housing RO 4-inch stainless steel units combine robust construction with smart engineering for long-lasting performance. The high-quality SUS304 or SUS316L body resists corrosion and scaling, while precision-machined ports and secure end caps ensure leak-free operation under varying pressures.
Designed for easy integration, these housings accommodate standard 4040 RO membrane elements and allow flexible plumbing configurations, making system upgrades, replacements, or expansions straightforward. The membrane housing ro polished or brushed finish not only enhances durability but also simplifies cleaning and inspection.
Highlights:
High-strength SUS304 / SUS316L construction
Leak-resistant design for reliable operation
Flexible end-in/end-out or side-in/end-out installation
Easy maintenance and membrane replacement
RO membrane 4040 housing durable polished or brushed surface for hygiene and longevity
DETAILS
MODEL
| 4" End-in/End-out 250Psi | |||||
|---|---|---|---|---|---|
| Model | L (mm) | L1 (mm) | D (mm) | A (in) | B (out) |
| 1-4014 | 427 | 367 | Ø102 | 1/2" | 1/2" |
| 1-4021 | 605 | 545 | Ø102 | 1/2" 3/4" | 1/2" |
| 1-4040 | 1088 | 1028 | Ø102 | 1/2" 3/4" | 1/2" |
| 1-4080 | 2104 | 2044 | Ø102 | 3/4" | 1/2" |
| 1-40120 | 3120 | 3060 | Ø102 | 3/4" | 1/2" |
| 1-40160 | 4136 | 4076 | Ø102 | 3/4" | 1/2" |
| 4" Side-in/End-out 250Psi | |||||
|---|---|---|---|---|---|
| Model | L (mm) | L1 (mm) | D (mm) | A (in) | B (out) |
| 2-4021 | 668 | 515 | Ø102 | 3/4" | 1/2" |
| 2-4040 | 1148 | 998 | Ø102 | 3/4" | 1/2" |
| 2-4080 | 2164 | 2014 | Ø102 | 3/4" | 1/2" |
| 2-40120 | 3180 | 3030 | Ø102 | 3/4" | 1/2" |
| 2-40160 | 4196 | 4046 | Ø102 | 3/4" | 1/2" |
| 1-40160 | 4136 | 4076 | Ø102 | 3/4" | 1/2" |
| 4" Side-in/End-out 400Psi | |||||
|---|---|---|---|---|---|
| Model | L (mm) | L1 (mm) | D (mm) | A (in) | B (out) |
| 3-4021 | 668 | 515 | Ø102 | 3/4" | 1/2" |
| 3-4040 | 1148 | 998 | Ø102 | 3/4" | 1/2" |
| 3-4080 | 2164 | 2014 | Ø102 | 3/4" | 1/2" |
| 3-40120 | 3180 | 3030 | Ø102 | 3/4" | 1/2" |
| 3-40160 | 4196 | 4046 | Ø102 | 3/4" | 1/2" |
| 2.5" Side-in/End-out 1000Psi | |||||
|---|---|---|---|---|---|
| Model | L (mm) | L1 (mm) | D (mm) | A (in) | B (out) |
| 5-2540S | 1162 | 1034 | Ø62 | 1/2" -3/4" | 1/2" |
| 4" Side-in/End-out 1000Psi | |||||
|---|---|---|---|---|---|
| Model | L (mm) | L1 (mm) | D (mm) | A (in) | B (out) |
| 5-4021-S | 730 | 602 | Ø102 | 3/4" -1" | 1/2" |
| 5-4040-S | 1212 | 1084 | Ø102 | 3/4" -1" | 1/2" |
| 5-4080-S | 2228 | 2100 | Ø102 | 3/4" -1" | 1/2" |
| 5-40120-S | 3244 | 3116 | Ø102 | 3/4" -1" | 1/2" |
| 5-40160-S | 4260 | 4132 | Ø102 | 3/4" -1" | 1/2" |
APPLICATION
Industrial Pure Water and Ultrapure Water Systems
- RO membrane housing 4040 for process water for electronics, pharmaceuticals, and food & beverage industries
- Boiler feed water and cooling circulation systems
Commercial and Residential RO Systems
- Stainless ro membrane housing for centralized water purification systems for hotels, hospitals, and schools
- Bottled water and drinking water production equipment
Laboratory and Research Facilities
High-purity water systems for laboratories and analytical instrumentsa
Water Reuse and Wastewater Treatment
RO membrane housing 304 ss stainless steel pressure vessel for industrial wastewater recycling and deep treatment systems
Concentration, desalination, and impurity removal in electroplating, dyeing, and chemical industries
FAQ
What is the typical production lead time for your membrane housings?
It depends on the quantity. For regular orders, the production lead time is around 15 days (excluding items that are in stock).
What is the pressure rating of your membrane housings?
Available pressure ratings include:
300 PSI
450 PSI
600 PSI
1000 PSI
1200 PSI
(Other custom pressure ratings can be provided based on application requirements.)
What materials are used?
Shell: Fiber-reinforced epoxy resin (FRP)
Inner liner: High-strength polyethylene (PE) or polyurethane
End caps & adapters: Stainless steel / Engineering plastics
These materials ensure corrosion resistance, light weight, and long service life.
Can the membrane housing be used in seawater desalination systems?
Yes. We offer high-pressure models (1000 PSI and above) suitable for seawater RO systems. The smooth inner surface also helps reduce pressure loss and fouling.
How do I install the membrane elements in the housing?
Typically:
Open the end cap
Insert thrust ring
Lubricate O-rings
Push membrane element in direction of concentrate outlet
We provide detailed installation manuals upon shipment.
Do you have any additional services?
- Yes, we provide a free goods inspection service. If your supplier is within 200 km of our company (Chengdu), even the transportation cost will be covered by us. If the distance is more than 200 km, only the transportation and hotel costs will be borne by you.
Can all your products accept OEM service?
Yes, for each item, there will be a minimum order quantity, and then we can produce an OEM order for you.
Can you source some other related products for us?
Yes, whether they are water- or wastewater-related products, we can source them for you. We have been working in the water and wastewater fields for more than 10 years.
