
8040 FRP Membrane Vessel for RO Water Treatment. Filament wound FRP composite construction, available in 300/450/600/1000 PSI pressure rating. Every housing passes factory hydrostatic pressure test to resist water hammer and long-term high pressure. Excellent chemical corrosion resistance. Stable under pH 3~11 during operation, pH 2~12 for cleaning. No rust risk, suitable for seawater, brackish water and industrial wastewater treatment. Smooth inner liner prevents scratch on RO membrane elements. Premium silicone sealing system ensures zero leakage under working pressure. Anti-shift thrust ring protects membranes from vibration damag. Standard size 4040 and 8040, fits 1 to 6 pcs spiral wound RO/NF membranes. Compatible with most mainstream membrane brands. End port and side port types optional. Seamless smooth inner liner prevents scratch on RO/NF membrane surface during loading and unloading, effectively extend membrane service life. Premium silicone O-rings, thrust rings and locking plates form reliable sealing system. Built-in limiting structure prevents membrane shifting under water flow impact, protect membrane end seal and maintain stable system pressure difference. Two types optional: end port and side port with standard NPT thread. Flexible layout for 1st stage and 2nd stage reverse osmosis system pipeline design. Complete supporting accessories supplied together, including end cap, lock plate, O-rings and thrust ring. Ready for installation after delivery without extra spare parts purchase. Wide application range: industrial water purification, seawater desalination, wastewater recycling, and etc.