Evaporator Body/Vessel

Product Specifications

Technical details and manufacturing context for Evaporator Body/Vessel

Definition

The evaporator body/vessel is the primary containment structure in a multi-stage vacuum evaporator train, designed to withstand vacuum pressure while housing the liquid feed, heating surfaces, and vapor separation mechanisms. It provides the controlled environment where evaporation occurs through heat transfer and pressure reduction. This component is typically fabricated from corrosion-resistant alloys such as Stainless Steel 316L, Duplex Stainless Steel, or Nickel Alloys, depending on the process fluid and operating conditions. The vessel is engineered to meet specific design parameters, including design pressure (1.0–1.6 MPa), design temperature (-20–200 °C), volume capacity (0.5–50 m³), wall thickness (6–30 mm), and vacuum rating (0.1–1.0 kPa). Material grades, such as 304 or 316L, are selected based on corrosion resistance requirements, with 316L offering higher resistance. Surface roughness (0.4–3.2 μm) is specified for hygienic applications, and dimensional tolerances on diameter (±0.5 mm) ensure proper fit with mating components. The vessel's weight (200–5000 kg) affects installation and foundation requirements, while corrosion allowance (1–3 mm) provides additional thickness for expected corrosion. These parameters are referenced against standards such as GB/T 150 for pressure vessels, ASTM A240 for material grades, ISO 1302 for surface texture, and ISO 2768 for general tolerances. The evaporator body/vessel is a critical component in industries such as chemical processing, food and beverage, and pharmaceuticals, where concentration of liquids under vacuum is required. It must be designed and fabricated in accordance with applicable codes and standards, and its performance must be verified through rigorous testing. When selecting an evaporator body/vessel, it is essential to confirm model-specific values and standards with the legal manufacturer or supplier, as the listed ranges are for reference only. The vessel's integrity is vital for safe and efficient operation, and regular inspection and maintenance are necessary to prevent failures such as corrosion, cracking, or vacuum loss. Understanding the operating principles and design considerations is crucial for proper integration into an evaporator system.

Working Principle

The vessel maintains a vacuum environment to lower the boiling point of the liquid inside. Heat is transferred through internal surfaces (like tubes or plates) to evaporate water or solvents, while the vacuum system removes vapor, allowing continuous concentration of the remaining liquid. The vacuum reduces the pressure above the liquid, enabling evaporation at lower temperatures, which is energy-efficient and suitable for heat-sensitive materials. The heating surfaces provide the necessary thermal energy, and the vapor separation mechanisms prevent liquid carryover. The vessel's design ensures structural integrity under vacuum and thermal stresses, and its materials resist corrosion from the process fluid.

Common Materials

Stainless Steel 316L, Duplex Stainless Steel, Nickel Alloys

Technical Parameters

Parameter	Typical range	Notes & selection driver
Design Pressure	1.0–1.6 MPa	Determines wall thickness and material selection.GB/T 150
Design Temperature	-20–200 °C	Affects material properties and thermal expansion.GB/T 150
Volume Capacity	0.5–50 m³	Determines batch size and footprint.
Wall Thickness	6–30 mm	Critical for pressure rating and corrosion allowance.GB/T 150
Material Grade	304/316L	316L for higher corrosion resistance.ASTM A240
Surface Roughness	0.4–3.2 μm	Lower for hygienic applications.ISO 1302
Tolerance on Diameter	±0.5 mm	Ensures fit with mating components.ISO 2768
Vacuum Rating	0.1–1.0 kPa	Operating pressure under vacuum conditions.GB/T 150
Weight	200–5000 kg	Affects installation and foundation requirements.
Corrosion Allowance	1–3 mm	Additional thickness for expected corrosion.GB/T 150

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Shell Plate Part
Forms the main cylindrical body providing structural integrity and containment

Material: Stainless Steel
Dished Ends Part
Hemispherical or elliptical ends that distribute pressure stresses

Material: Stainless Steel
Manway
Access opening for inspection, maintenance, and cleaning

Material: Stainless Steel with Seal
Nozzles and Connections Part
Inlets for feed, outlets for concentrate and vapor, instrument connections

Material: Stainless Steel
Support Skirt/Legs Part
Structural supports that transfer vessel weight to foundation

Material: Carbon Steel or Stainless Steel
Vapor Separation Mechanism
Knocks entrained droplets out of the rising vapor so concentrate is not carried over into the condenser.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Evaporator Body/Vessel.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Multi-Stage Vacuum Evaporator Train

View system integration details

Manufacturers of Evaporator Body/Vessel

Manufacturer profiles associated with Evaporator Body/Vessel.

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Frequently Asked Questions

What materials are commonly used for evaporator bodies?

Common materials include Stainless Steel 316L, Duplex Stainless Steel, and Nickel Alloys. The choice depends on corrosion resistance requirements and process conditions. Material grades such as 304 or 316L are specified, with 316L offering higher corrosion resistance.

What design parameters are critical for an evaporator body?

Key parameters include design pressure (1.0–1.6 MPa), design temperature (-20–200 °C), volume capacity (0.5–50 m³), wall thickness (6–30 mm), vacuum rating (0.1–1.0 kPa), and corrosion allowance (1–3 mm). These must be verified for the specific application.

What standards apply to evaporator bodies?

Relevant standards include GB/T 150 for pressure vessels, ASTM A240 for material grades, ISO 1302 for surface roughness, and ISO 2768 for general tolerances. These are reference standards; compliance must be confirmed with the manufacturer.

How does the vacuum environment affect evaporation?

The vacuum lowers the boiling point of the liquid, allowing evaporation at lower temperatures. This reduces energy consumption and is beneficial for heat-sensitive materials. The vessel must maintain the vacuum while withstanding the associated pressure differential.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Full vacuum to 10 bar (typical), up to 25 bar with reinforced design
flow rate:	5-500 m³/hr (process dependent)
temperature:	-20°C to 200°C (typical), up to 300°C with special materials
slurry concentration:	Up to 40% solids by weight (typical), higher with agitation

Product Specifications

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