MHC-8-40

Summary

Product Identification

This overview details Wila A/S Membrane Housings with Clamp ferrule connections, categorized as "MHC" type, specifically the MHC-8-40 series. These are medium-pressure housings designed for 40 bar.

They are tubular pressure vessels featuring a single inlet (Feed) on the shell side, an unfiltered outlet (Retentate) also on the shell side, and a filtered outlet (Permeate) from one of the end centers. The housings are suitable for NF (Nanofiltration) and RO (Reverse Osmosis) filtration in the food and beverage industry, often used to reduce or eliminate microbials in liquid-containing products like juice, beer, soy, whey, milk, milk powder, and chocolate.

Materials of Construction

• Housing: EN 1.4404 (AISI 316L) stainless steel.
• Inside surface roughness: ≤ 0.8 µm.
• Outside surface roughness: ≤ 1.6 µm.
• Fluid compatibility: All fluid media must be compatible with EN 1.4404 (AISI 316L) Stainless steel.

Operating Limits

• Maximum Pressure: 40 barg.
• Maximum Temperature: 70°C.

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). The membrane housing is designed only for fluid group 2 (non-dangerous fluids).

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.

Mechanical / Hydraulic

The MHC-8-40 series is designed for 7.9” x 38” (8038) membranes and can accommodate from 1 to 6 elements. There are two primary connection arrangements: Model A and Model C (other arrangements are available).

Product Code Breakdown

MHC-8-40-X-YY-ZZ-_

• X: Indicates the number of elements that can be fitted (from 1 to 6 elements).
• YY: Indicates Feed and Retentate clamp ferrules connections.
  • Sizes: 63, 51, 50.
  • Translated to ISO 2852-2: Ø63.5, Ø51.
  • Translated to DIN 32676-A: DN50.
• ZZ: Indicates Permeate end clamp ferrule connection.
  • Sizes: 38, 25, 40, 26.
  • Translated to ISO 2852-2: Ø38, Ø25.
  • Translated to DIN 32676-A: DN40, DN25.
• _: Indicates Feed and Retentate connection arrangement (Either A or C).

General Specifications

• Element Type: 8038 (7.9" diameter, multiple 38" length elements).
• Permeate Connection Internal Diameter: Ø28.9 mm (ID).
• Housing Outer Diameter: Ø250 mm.
• Element Quantity Options: 1 to 6 elements.
• Volume (nominal): Ranges from 40 liters (for 1-element models) to 199 liters (for 6-element models).
• Dry Weight: Ranges from 42 kg (for 1-element models) to 122 kg (for 6-element models).

Connections

• All connections are Tri-clamp connections for Feed, Retentate, and Permeate.
• For the 40 bar pressure rating, SH or SSH clamps are recommended.
• The Membrane Housing should be installed with the Retentate outlet at the highest point for better air venting.
• Exact tabulated values for dimensions (TL, HL, CL, IL), stock numbers, and drawing numbers for specific models (1-element to 6-element, Model A and Model C, with various connection sizes) are available in the official PDF.

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

Official datasheet (PDF)

PDF datasheet