MHA-6-16

Summary

Product Identification

This document provides a detailed overview for Wila Membrane Housings, specifically the 'MHA-6-16' type, designed for low-pressure applications up to 16 bar. These housings are tubular pressure vessels with a single inlet (Feed), an unfiltered outlet (Retentate), and a filtered outlet (Permeate). They are primarily used in the food and beverage industry for Microfiltration (MF) and Ultrafiltration (UF) to reduce or eliminate microbials in liquid products like juice, beer, soy, whey, milk, and chocolate.

The housings are designed for 6.3” x 38” (6338) membranes. The membranes and Axial Thrust Discs (ATDs) are not included but Wila's hygienic, CIP-clean, stainless steel ATDs can be supplied upon request.

General Specifications

• Material: EN 1.4404 (AISI 316L) stainless steel. Fluid media must be compatible with this material.
• Surface Finish: Sanitary surface finish in accordance with 3A sanitary standard.
  • Inside surface roughness: ≤ 0.8 µm
  • Outside surface roughness: ≤ 1.6 µm

Operating Limits

• Maximum Pressure: 16 bar (16 barg)
• Maximum Temperature: 70°C

Mechanical / Hydraulic

The membrane housings are available in configurations from 1 to 6 elements.

• Element Type: 6338 (6.3” dia. x 38" length)
• Permeate Internal Diameter (ID): Ø28.9
• Feed and Retentate Connections: Collaring connections. Available sizes (other sizes are available):
  • Ø76, Ø63.5, Ø51
  • DN65, DN50
  • 3”, 2.5”, 2”
  • Only weld ends with a minimum 2 mm wall thickness should be used. Welds must comply with 3-A Sanitary Standards 00-01 and inside welds ground to ≤ 0.8 µm.
• Permeate Connection: End clamp ferrule connections. Available sizes (other types and sizes are available):
  • Ø38, Ø25 (in accordance with ISO 2852-2)
  • DN40, DN25 (in accordance with DIN 32676-A)
  • 1.5”, 1” (in accordance with DIN 32676-C)
  • An SH clamp is recommended for the Permeate connection.

Dimensions and Weights (approximate)

Dimensions (TL, HL, CL, IL) and model-specific connection sizes for Feed/Retentate (F&R) and Permeate (P) vary significantly by the number of elements and connection type (Model A or C).

• 1-element housing:
  • Volume: 27 liters
  • Dry weight: 25 kg
  • Example (MHA-6-16-1-76-38-A): TL 1342 mm, HL 1265 mm, CL 1105 mm, IL 1013 mm.
• 2-element housing:
  • Volume: 47 liters
  • Dry weight: 35 kg
  • Example (MHA-6-16-2-76-38-A): TL 2322 mm, HL 2245 mm, CL 2085 mm, IL 1993 mm.
• 3-element housing:
  • Volume: 68 liters
  • Dry weight: 45 kg
  • Example (MHA-6-16-3-76-38-A): TL 3307 mm, HL 3230 mm, CL 3070 mm, IL 2978 mm.
• 4-element housing:
  • Volume: 88 liters
  • Dry weight: 55 kg
  • Example (MHA-6-16-4-76-38-A): TL 4287 mm, HL 4210 mm, CL 4050 mm, IL 3958 mm.
• 5-element housing:
  • Volume: 109 liters
  • Dry weight: 65 kg
  • Example (MHA-6-16-5-76-38-A): TL 5272 mm, HL 5195 mm, CL 5035 mm, IL 4943 mm.
• 6-element housing:
  • Volume: 130 liters
  • Dry weight: 75 kg
  • Example (MHA-6-16-6-76-38-A): TL 6252 mm, HL 6175 mm, CL 6015 mm, IL 5928 mm.

The Membrane Housing should be installed with the Retentate outlet at the highest point for better air venting. See the official PDF for exact tabulated values for specific models and connection sizes.

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

Documentation

Standard documentation includes:

1. Customer drawing with description and design data table
2. Declaration of conformity
3. User Manual

As supplement, the following can be provided:

4. 3.1 material certificates according to EN 10204
5. Weld-logs with associated welding certificates according to DS/EN ISO 9601-1

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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 official OEM PDF datasheet. For contractual data, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet