Knappe Assembly & Operating Instructions 4 inch

Summary

Product identification

This document provides assembly and operating instructions for composite vessels designed for RO/UF applications.

• Product Series: RO4Z_M__-V4I__
• Vessel Type: 4 inch Front Port Vessels
• Design Code: Designed in accordance with ASME X pressure vessel code.
• Intended Use: Housing for spiral elements to desalinate brackish water or sea water.

Operating limits

Specific pressure and temperature limits are not provided in this extract. See the official PDF for exact tabulated values.

Materials in contact with the medium

All materials in contact with the medium are food grade and meet various potable water requirements.

• Liner: Pure food grade PVC (matches KTW (German) and EU potable water requirements).
• Endplates: Pure food grade PPE (matches KTW (German), WRAS, ACS, and EU potable water requirements).
• Seals (O-rings): Pure food grade EPDM (matches EU potable water requirements).
• Adaptor: Pure food grade PPE (matches KTW (German), WRAS, ACS, and EU potable water requirements).

Mechanical / hydraulic

• Element Adaptor: A closed adaptor for connection of the permeate tube of the element is packed separately with required seals. This version has no open adapter; the endplate connects directly to the membrane.
• Compatibility: Suitable for male membranes with a centercore tube OD19.2mm.
• Thermal Expansion: For a six-element vessel, expect approximate expansion:
  • Diameter (DIA) = 0.8mm
  • Length (L) = 8-10mm

Installation and Maintenance Notes

• Lubrication: For the installation of all rubber parts (e.g., O-rings), glycerin lubrication is required. Do not use petroleum-based lubricants.
• Cleaning: Ensure vessels are clean and free from dirt before installing seals. Small deposits and scratches can be smoothed with 400 grain wet type emery paper.
• Leakage Troubleshooting: Possible causes include damaged O-rings, dirty surfaces, scratches in the inliner, or issues related to water drain/air suction during shutdown.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original PDF datasheet. For contractual purposes, always refer to the official OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet