MH-8-64

Summary

Product identification

This is a detailed overview for Wila A/S Membrane Housings, specifically the type ‘MH-8-64’ which are high-pressure housings designed for up to 64 bar. These membrane housings are tubular pressure vessels with collaring connections for Feed and Retentate, and a filtered outlet for Permeate from one of the end centers. They are suitable for Reverse Osmosis (RO) filtration and are often used in the food and beverage industry to reduce or eliminate microbials in liquid products such as juice, beer, soy, whey, milk, milk powder, and chocolate.

The housings are designed for 7.9” x 38” (8038) membranes and can accommodate from 1 to 6 elements. Models vary by Feed and Retentate connection arrangement (e.g., Model A or Model C) and connection sizes.

Operating limits

• Maximum Pressure: 64 bar (g)
• Maximum Temperature: 85°C

Mechanical / hydraulic

• Material of Construction: EN 1.4404 (AISI 316L) stainless steel
• Internal Surface Roughness: ≤ 0.8 µm
• External Surface Roughness: ≤ 1.6 µm
• Fluid Media Compatibility: Must be compatible with EN 1.4404 and EN 1.4462 Stainless steel.
• Element Type: 8038 (7.9" dia. x 38" length)
• Feed and Retentate Connections: Collaring connections. Available sizes include Ø76, DN65, Ø63.5, Ø51, DN50. Requires EN 1.4462 weld ends with a minimum 6 mm wall thickness.
• Permeate Connections: End clamp ferrule connections. Available sizes include Ø38, Ø25, DN40, DN25. An SSH clamp is recommended for the permeate connection.
• Installation Note: The Membrane Housing should be installed with the Retentate outlet at the highest point for better air venting.

Physical Characteristics by Element Quantity

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

For detailed dimensions (TL, HL, CL, IL) and specific connection configurations, refer to the official PDF.

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 the European Parliament directive No. 2014/68/EU (Pressure Equipment Directive) for fluid group 2 (non-dangerous fluids).
• PED - Category I and EN 13445 for both 5 and 6 element housings.

Documentation

• Customer drawing with description and design data table
• Declaration of conformity
• User Manual

As supplements, 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 generated from extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet