MH-8-12

Summary

Product identification

This document provides a detailed overview for Wila Membrane Housings, specifically type MH-8-12. These low-pressure membrane housings are designed for pressures up to 12 bar and are suitable for Nanofiltration (NF) and Reverse Osmosis (RO) applications.

The product models follow the naming convention MH-8-12bar-X-element – Model _, where:

• MH: Membrane Housing with collaring connections for Feed and Retentate.
• 8: Designed for 7.9” x 38” (8038) membranes.
• 12bar: Indicates a maximum design pressure of 12 bar.
• X: The number of elements that can be fitted, ranging from 1 to 6.
• _: Indicates the Feed and Retentate connection arrangement, either Model A or Model C. Other connection arrangements are available.

The housings are used in the food and beverage industry for reducing or eliminating microbials in liquid-containing products such as juice, beer, soy, whey, milk, milk powder, and chocolate.

Operating limits

• Maximum pressure: 12 barg
• Maximum temperature: 70°C

Mechanical / hydraulic

The membrane housing is constructed from EN 1.4404 (AISI 316L) stainless steel with a sanitary surface finish. All fluid media used must be compatible with EN 1.4404 (AISI 316L) Stainless steel.

• Inside surface roughness: ≤ 0,8 µm
• Outside surface roughness: ≤ 1,6 µm

The membrane housing should be installed with the Retentate outlet at the highest point for better air venting.

Housings are available for:

• 1 element
• 2 elements
• 3 elements
• 4 elements
• 5 elements
• 6 elements

Approximate Volumes and Dry Weights:

• 1-element housing: 41 liters, 30 kg
• 2-element housing: 72 liters, 42 kg
• 3-element housing: 104 liters, 53 kg
• 4-element housing: 136 liters, 64 kg
• 5-element housing: 168 liters, 76 kg
• 6-element housing: 200 liters, 88 kg

Overall dimensions (TL, HL, CL, IL) vary based on the number of elements and connection types. See the official PDF for exact tabulated values.

Connections

• Feed and Retentate connections: Collaring connections (weld ends with a minimum 2 mm wall thickness are recommended).
  • Sizes (ISO 2852-2): Ø76, Ø63.5, Ø51
  • Sizes (DIN 32676-A): DN65, DN50
• Permeate connections: End clamp ferrule connections. An SH clamp is recommended.
  • Sizes (ISO 2852-2): Ø38, Ø25
  • Sizes (DIN 32676-A): DN40, DN25
• Internal Diameter (ID) for elements: Ø28.9 mm

Certifications 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), designed only for fluid group 2 (non-dangerous fluids).

Documentation includes:

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

Supplementary documentation (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 an extracted text and may not include all figures, footnotes, or the latest revisions found in the complete OEM PDF datasheet. For contractual data and complete specifications, the official OEM PDF revision used on the project must be consulted.

Official datasheet (PDF)

PDF datasheet