How do I choose between 316L and duplex?

Chloride concentration and operating temperature decide it. Above roughly 200 ppm chloride at 60 °C, 316L begins to accumulate pitting risk and 2205 duplex becomes the economical choice over a ten-year life. We run the calculation as part of the enquiry response.

What is the lead time on a standard multi-round housing?

Stocked configurations in 316L ship in four to six weeks. Custom metallurgy, jacketed designs and third-party-inspected vessels typically run ten to fourteen weeks depending on plate availability.

Will your housing accept my existing cartridges?

In most cases yes. Send the element end-cap type, outer diameter and length and we will confirm compatibility, or supply an adapter plate where the seal geometry differs.

Industrial Filter Housings — VESSA Series

VESSA Series

Single and multi-round housings machined from 316L, duplex and carbon steel, designed to code and proven on the hydrostatic rig before a single seal is fitted.

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Maximum design pressure: 250 bar
Design pressure: Vacuum to 250 bar g
Standard configurations: 5
Industries served: 6

Overview

The pressure envelope, engineered around the element.

A filter housing is a pressure vessel first and a filtration device second. The VESSA series is designed in that order: shell thickness, nozzle reinforcement and head geometry are calculated against the full fatigue duty of the plant, then the internals are laid out so that flow reaches every element face at the same velocity.

Every VESSA housing is modelled in CFD before fabrication. Maldistribution across a 24-round bundle is held below 6% face velocity deviation, which is the difference between elements that expire together and elements that expire one by one across an eighteen-month tail.

Closures are selected for how often the plant actually opens the vessel. Swing-bolt for weekly change-outs, davit-arm for heads above 40 kg, and quick-release band clamps where a two-minute turnaround pays for itself in the first quarter.

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Specifications

Technical envelope

Design code: ASME VIII Div. 1 (U-stamp), PED 2014/68/EU, IS 2825
Design pressure: Vacuum to 250 bar g
Design temperature: −45 °C to +400 °C
Materials: SS 304/304L, SS 316/316L, Duplex 2205, Super Duplex 2507, CS A516 Gr.70, Alloy 20, Hastelloy C276
Element capacity: 1 to 84 rounds, 10" to 60" element length
Connections: ½" to 24" — ANSI flanged, BSP/NPT threaded, tri-clamp, victaulic
Surface finish: Mill, 180 grit, 320 grit, electropolished to Ra ≤ 0.4 µm
Testing: Hydrostatic 1.5 × design, helium leak, dye penetrant on all pressure welds

Configurations

VESSA-S
Single-round in-line housing for low-flow polishing and sample-point duty.
VESSA-M
Multi-round bundle, 3 to 84 elements, side-in / bottom-out flow path.
VESSA-H
High-pressure forged-head design rated to 250 bar for wellhead and hydraulic service.
VESSA-SAN
Sanitary construction with crevice-free internals, electropolished and drainable to zero hold-up.
VESSA-J
Jacketed variant with steam or thermal-fluid jacket for viscous and crystallising media.

Advantages

What this platform does that a catalogue item does not.

Flow modelled before steel is cut

CFD on every new geometry keeps face-velocity deviation under 6% across the bundle, so elements load evenly and expire together.

Traceable to the heat number

Every plate, forging and weld consumable carries an EN 10204 3.1 or 3.2 certificate bound into the delivered data book.

Closure chosen by change-out frequency

Swing-bolt, davit, or band clamp — specified against how often your team actually opens the vessel, not by catalogue default.

Retrofit-compatible internals

Tie-rod and spring-plate geometry accepts 222, 226, flat-gasket and DOE elements, so an existing element contract need not be torn up.

Applications

Where it is installed

Final product polishing on liquid transfer lines

Pre-filtration ahead of reverse-osmosis and ultrafiltration trains

Amine and glycol filtration in gas sweetening

Catalyst recovery on reactor discharge

Cooling water side-stream clarification

Resin trap duty downstream of ion-exchange beds

Industries

Sectors this platform serves

Oil & Gas

Separation that holds through sour service and sand.

Chemical Processing

Compatibility engineered before the first litre flows.

Pharmaceutical & Biotech

Filtration that survives the audit as well as the process.

Food & Beverage

Clarity and safety without touching the flavour.

Power Generation

Availability protected at every intake and every loop.

Water & Wastewater

Membranes protected, discharge limits met.

Technical drawings

Issued with every order

General arrangement

Dimensioned GA with nozzle orientation and lifting-lug positions.

Nozzle schedule

Sizes, ratings, projections and reinforcement pad detail.

Internals assembly

Tie-rod, spring plate and seal-plate stack-up with tolerances.

Foundation and load plan

Empty, operating and flooded mass with anchor-bolt pattern.

Downloads

Datasheets, CAD and manuals

VESSA Series Technical Datasheet

PDF · 3.4 MB

Housing Selection & Sizing Guide

PDF · 5.1 MB

VESSA-M 3D Model Pack (STEP)

STEP · 18.2 MB

Installation, Operation & Maintenance Manual

PDF · 2.7 MB

FAQs

Questions engineers ask about industrial filter housings

Yes. Our ASME Section VIII Division 1 authorisation covers U-stamp fabrication, and we routinely issue PED Module H documentation for European destinations. Certification route is fixed at the kick-off meeting so the data book matches the destination's regulatory regime.