MHA-8-64

Summary

Product identification

This document provides a detailed overview for Wila A/S Membrane Housings type 'MHA-8-64', designed for high-pressure applications up to 64 bar. These membrane housings are tubular pressure vessels primarily used in the food and beverage industry for RO filtration to reduce or eliminate microbials and extend shelf life.

• Product Type: Membrane Housing
• Model Series: MHA-8-64
• Application: RO filtration in the food and beverage industry for liquid-containing products such as juice, beer, soy, whey, milk, milk powder, chocolate.
• Membrane Type: Designed for 7.9" x 38" (8038) membranes.
• Element Quantity: Available for 1 to 6 elements.
• Material: EN 1.4404 (AISI 316L) stainless steel. Weld ends require EN 1.4462.
• Surface Finish: Inside surface roughness ≤ 0.8 µm, outside surface roughness ≤ 1.6 µm, in accordance with 3A sanitary standard.

Operating limits

• Maximum Pressure: 64 barg
• Maximum Temperature: 85°C

Mechanical / hydraulic

The Membrane Housing features a single inlet (Feed) on the shell side, an unfiltered outlet (Retentate) on the shell side, and a filtered outlet (Permeate) from one of the end centers.

• Internal Diameter (Permeate Tube): Ø28.9 mm

• Connections:

  • Feed and Retentate: Collaring connections. Available sizes include:
    • Ø76, Ø63.5, Ø51 (mm)
    • DN65, DN50
    • 3.0", 2.5", 2.0"
    • Minimum 6 mm wall thickness for weld ends (EN 1.4462).
  • Permeate: Clamp ferrule connection. Available sizes include:
    • Ø38, Ø25 (mm)
    • DN40, DN25
    • 1.5", 1.0"
  • Note: Other connection sizes and arrangements (beyond Model A and C) are available.

• Installation Note: The Retentate outlet should be at the highest point for better air venting.

• Capacity & Weight by Element Quantity:

  • 1-element: Volume 41 liters, Dry weight 43 kg
  • 2-elements: Volume 72 liters, Dry weight 62 kg
  • 3-elements: Volume 104 liters, Dry weight 78 kg
  • 4-elements: Volume 136 liters, Dry weight 94 kg
  • 5-elements: Volume 168 liters, Dry weight 110 kg
  • 6-elements: Volume 200 liters, Dry weight 126 kg

• Dimensions (all in millimeters): Specific total length (TL), housing length (HL), clamp length (CL), and internal length (IL) are available for Model A and Model C configurations across all element quantities and connection sizes. See the official PDF for exact tabulated values.

Regulations and Directives

The membrane housing is designed and manufactured in accordance with:

• European Commission regulation No. 2023/2006 (Good Manufacturing Practices)
• European Parliament directive No. EN 1935/2004 (Food Contact Materials)
• European Parliament directive No. EN 1907/2006 (Chemical Restrictions (REACH))
• PED - Article 4.3 (SEP) in European Parliament directive No. 2014/68/EU (Pressure Equipment Directive) – designed for fluid group 2 (non-dangerous fluids).
• PED - Category I and EN 13445 for both 5 and 6 element housings.
• 3-A Sanitary Standards 00-01 / 45-03.

Documentation

• Customer drawing with description and design data table
• Declaration of conformity
• User Manual
• As Supplement the following can be provided:
  • 3.1 material certificates according to EN 10204
  • Weld-logs with associated welding certificates according to DS/EN ISO 9601-1

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions found in the official PDF. For contractual data, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet