Knappe Pressure Vessels

Max. Working Pressure: 21 bar (300 PSI) · Max Test Pressure (ASMEX): 27.3 bar (390 PSI) · Max. Working Temperature: 65 °C (150 °F)

This is a 4-inch front-entry reverse osmosis membrane pressure vessel from Knappe's V4i series.

Pressure: 300 PSI · Manufacturer/Material: Knappe Composites Mat.: 14EP4

This is a Knappe endplate assembly for 4-inch RO membrane vessels, designed for the permeate/brine side application. It supports various union options rated up to 300 PSI.

Pressure rating: 300 PSI possible

This is a Knappe Pressure Vessels feed assembly, model 14EP4-C, designed as an endplate for RO membrane housings.

Permeate optional port: G3/4in cylindrical (different styles available) · Max. Working Pressure: 31 bar (450 PSI) · Max. Test Pressure (ASMEX): 40.3 bar (585 PSI)

The Knappe Pressure Vessels Serie 4" V4i 31 is a front-entry reverse osmosis membrane pressure vessel.

HEAD ENDPLATE open: 74EP4, PPE · Max. Working Pressure: 42 bar / 600 PSI · Max. Test Pressure (ASMEX): 54.6 bar / 780 PSI

The Knappe Pressure Vessels Serie 4" V4i 42 is a front-entry reverse osmosis membrane housing designed for one to six elements.

Max. Working Pressure: 70 bar / 1000 PSI · Max. Test Pressure (ASMEX): 91 bar / 1300 PSI · PermeatePort Adapter: PVC

This is a Knappe Composites 4-inch front-entry RO membrane pressure vessel designed for reverse osmosis systems.

Location A (Permeate): 16x3 (Qty: 1) · Material ID: 14STOSW3/P · Location C (HP-Port): 22x3 (Qty: 1)

This is a Permeat assembly from Knappe Pressure Vessels, designed for use with RO membrane systems.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is a Knappe feed assembly designed for RO membrane pressure vessels.

Permeate Port Body: 78PP/BSP (PPE) · Max. Working Pressure: 21 bar / 300 PSI · Max. Test Pressure acc. ASME X: 27.3 bar / 390 PSI

The Knappe Serie 8" 3Ss 21 is an 8-inch diameter, multi-element brackish water reverse osmosis pressure vessel.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is an Endplate ASSY Sideport for the Knappe Series S3s RO membrane pressure vessels.

Selection cues: rejection · permeate flow · membrane area and operating pressure

Feed assembly is a membrane housing or pressure vessel for RO/NF membrane systems, best compared by port format, element count, and installation envelope.

Max. Working Pressure: 31 bar (450 PSI) · Max. Test Pressure (acc. ASME X): 40.3 bar (585 PSI) · Permeate Port Body (Part # 78PP/BSP): PPE

The Knappe Series 8" 3Ss 31 are 8-inch diameter sideport brackishwater reverse osmosis membrane pressure vessels designed for 60-inch elements.

Max. Working Pressure: 42 bar / 600 PSI · Max Test Pressure (acc. ASME X): 54.3 bar / 780 PSI · Permeate Port Body: PPE

The Knappe Pressure Vessels Serie 8" 3p 42 is an 8-inch diameter brackish water RO membrane pressure vessel rated for 600 PSI. It features a FRP shell, PVC liner.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is an Endplate Assembly for Knappe Pressure Vessels' Series S3p, designed for RO membrane applications.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is an endplate assembly designed as a sideport for Knappe Pressure Vessels Series S3p, with a closed permeate.

Max. Working Pressure: 70 bar / 1000 PSI · Max. Test Pressure (ASMEX): 91 bar / 1300 PSI · Permeate Port Body: PPE

The Knappe Pressure Vessels Serie 8" SXp 70 is an 8-inch diameter FRP and PVC reverse osmosis membrane pressure vessel designed for seawater applications.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is an Endplate Assembly Sideport for Knappe Composites Series S3p, designed with a permeate closed configuration.

Max. Working Pressure: 21 bar (300 PSI) · Max. Test Pressure: 27.3 bar (390 PSI) · Permeate Port Body open: PPE

This is a Knappe Pressure Vessels Series 8"V2s 21 front-entry membrane housing designed for brackish water applications.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is a front port endplate assembly designed for RO membrane pressure vessels by Knappe Composites.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This is a feed assembly for RO membrane pressure vessels, including various EPDM O-rings. It is an O-rings and endplate assembly with additional listed components.

Max. Working Pressure: 31 bar / 450 PSI · Max. Test Pressure: 40.3 bar / 585 PSI

The Knappe Pressure Vessels Serie 8"V2s 31 is an 8-inch front-entry FRP pressure vessel designed for brackish water applications and can house multiple 40-inch membrane...

Max. Working Pressure: 42 bar (600 PSI) · Max. Test Pressure: 54.6 bar (780 PSI) · Permeate Port Body: PPE

The Knappe Pressure Vessels Serie 8"V2s 42 is an 8-inch front-entry reverse osmosis membrane pressure vessel. It is constructed with an FRP shell, PVC liner.

Selection cues: rejection · permeate flow · membrane area and operating pressure

This permeate assembly is the Endplate ASSY Frontport model 18EP-M-BW-V2s from Knappe Pressure Vessels, designed for RO membrane systems.

Material Code: 18EP-M-BW-V2s/C

This feed assembly is designed for RO membrane pressure vessels. It includes multiple EPDM O-rings for sealing.

Max. Working Pressure: 69 bar (1000 PSI) · Max. Test Pressure: 89.7 bar (1300 PSI) · Permeate Port Body: PVC

This is a Knappe Series 8" V2 70 front-entry RO membrane pressure vessel designed for reverse osmosis applications.

Pressure Rating: 1000/1200 PSI · Pressure: 1200 PSI

This is a Knappe Permeat assembly, the front endplate for RO membrane pressure vessels. It is rated for 1000/1200 PSI and includes EPDM O-rings for sealing.

Pressure rating: 1000/1200 PSI · Pressure: 1200 PSI

This Knappe Pressure Vessels feed assembly is designed for RO membrane systems. It features EPDM O-rings and is rated for pressures up to 1200 PSI.

Max. Working Pressure: 84 bar (1200 PSI) · Max. Test Pressure: 109 bar (1560 PSI) · Permeate Port Body: PPE

The Knappe Serie 8"V2 84 is an 8-inch, front-entry FRP seawater RO membrane pressure vessel.

Selection cues: rejection · permeate flow · membrane area and operating pressure

Knappe Catalog 8" Pressure Vessels are designed as RO membrane housings featuring the AnyClic self-sealing endplate and AnyDistance shimming system.

Selection cues: rejection · permeate flow · membrane area and operating pressure

These Knappe AnyParts are permeate port adapters designed for RO membrane housings. Available in various materials like PVC, PA66, PP, and SS 316L.

Selection cues: rejection · permeate flow · membrane area and operating pressure

The Knappe AnyRack Single is an RO membrane pressure vessel designed for water treatment applications.

Selection cues: rejection · permeate flow · membrane area and operating pressure

The Knappe AnyRack Double is a pressure vessel designed for RO membrane systems.

Compatibility: Suitable for male membranes with a centercore tube OD19.2mm

This is a 4-inch front port composite vessel designed for RO/UF applications, built to ASME X code for brackish or seawater desalination. It features food-grade PVC, PPE.

Permeate stream pressure limit: Should not exceed 150 PSI / 10 bars (unless certified differently) · Permeate port: Not to exceed 4 kg · Over-pressure protection: Essential that pressure to which any vessel is subjected cannot exceed 105% of design pressure

This composite vessel is designed for reverse osmosis, nanofiltration, and ultrafiltration applications, housing any make of 8-inch spiral-wound membrane elements.