MHA-8-12

Summary

Product Identification

The Wila MHA-8-12 Membrane Housing is a tubular pressure vessel designed for membrane filtration applications, specifically for Nanofiltration (NF) and Reverse Osmosis (RO). It features collaring connections for Feed and Retentate.

These membrane housings are used in the food and beverage industry to reduce or eliminate microbials in liquid-containing products such as juice, beer, soy, whey, milk, milk powder, and chocolate.

The product range supports 1 to 6 elements.

• Model Name Format: MHA-8-12bar-X-element - Model _
  • MHA: Membrane Housing with collaring connections for Feed and Retentate, with 3A certificate.
  • 8: Designed for 7.9" x 38" (8038) membranes.
  • 12bar: Indicates design pressure up to 12 bar and temperatures up to 70°C.
  • X: Number of elements that can be fitted (from 1 to 6).
  • _: Indicates Feed and Retentate connection arrangement (either Model A or Model C). Other connection arrangements are available.

Operating Limits

• Maximum Pressure: 12 barg
• Maximum Temperature: 70°C

Materials of Construction

• Housing Material: EN 1.4404 (AISI 316L) stainless steel
• Inside Surface Roughness: ≤ 0.8 µm
• Outside Surface Roughness: ≤ 1.6 µm
• All fluid media must be compatible with EN 1.4404 (AISI 316L) Stainless steel.

Certifications and Compliance

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 only for fluid group 2 (non-dangerous fluids).
• 3-A Sanitary Standards 00-01 / 45-03

Connections

• Feed and Retentate: Collaring connections.
  • Available sizes include: Ø76, Ø63.5, Ø51; DN65, DN50; 3.0", 2.5", 2.0".
  • For Feed and Retentate, weld ends with a minimum 2 mm wall thickness are required. Welds must comply with 3-A Sanitary Standards 00-01, and inside welds must be ground to ≤ 0.8 μm.
• Permeate: End clamp ferrule connection.
  • Available sizes include: Ø38, Ø25; DN40, DN25; 1.5", 1.0".
  • An SH clamp is recommended for the Permeate connection.
• Permeate Internal Diameter (ID): Ø28.9

Mechanical / Hydraulic

The membrane housing is designed for 7.9" diameter membrane elements. The retentate outlet should be at the highest point for better air venting.

• Element Type: 8038
• Number of Elements, Volume, and Dry Weight:
  • 1 element: 41 liters (volume), 30 kg (dry weight)
  • 2 elements: 72 liters (volume), 42 kg (dry weight)
  • 3 elements: 104 liters (volume), 53 kg (dry weight)
  • 4 elements: 136 liters (volume), 64 kg (dry weight)
  • 5 elements: 168 liters (volume), 76 kg (dry weight)
  • 6 elements: 200 liters (volume), 88 kg (dry weight)

Detailed dimensions (TL, HL, CL, IL) vary by model and configuration. See the official PDF for exact tabulated values.

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

Official datasheet (PDF)

PDF datasheet