Upper Distributor for Vessels | Component Specifications

Product Specifications

Technical details and manufacturing context for Upper Distributor

Definition

The Upper Distributor is a critical internal component of vessels and containers designed to ensure uniform distribution of incoming substances (such as liquids, powders, or gases) across the cross-sectional area of the vessel. It prevents channeling, promotes efficient mixing or reaction, and optimizes contact with other materials or media within the system. It is typically installed at or near the top inlet of the vessel. The distributor is engineered to handle a range of operating conditions, with nominal diameters from DN50 to DN300 (ISO 6708), flow rates from 10 to 500 m³/h, operating pressures from 1.0 to 1.6 MPa, and temperatures from -20°C to 120°C. Distribution uniformity is specified at ±5%, which is critical for process consistency. Materials on file include stainless steel grades SS304 and SS316L (ASTM A240), with surface finishes up to Ra ≤ 0.8 μm (ISO 1302). Connection types are flanged or threaded (ISO 7005), and seal materials include PTFE and EPDM. Weight ranges from 15 to 120 kg depending on size and material. These parameters serve as reference ranges for selection and must be confirmed for the specific model and application. The distributor is a component, not a standalone product, and its performance depends on proper integration with the vessel design. Verification of model-specific values and standards with the legal manufacturer or supplier is essential before procurement.

Working Principle

The Upper Distributor receives a concentrated stream of material from the inlet. Through its design (e.g., perforated plates, spray nozzles, radial arms, or a network of channels), it disperses the incoming flow into multiple smaller streams, spreading them evenly over the vessel's internal diameter to achieve a uniform initial distribution profile. This prevents channeling and ensures that the entire cross-section is utilized effectively, promoting consistent contact and reaction.

Common Materials

Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN50–DN300 mm	Matches pipe size for flow capacity.ISO 6708
Flow Rate	10–500 m³/h	Ensure sufficient flow for even distribution.
Operating Temperature	-20–120 °C	Above 120°C may degrade seals.
Distribution Uniformity	±5 %	Critical for process consistency.
Material Grade	SS304/SS316L	316L for corrosive media.ASTM A240
Surface Finish	Ra ≤ 0.8 μm	Smooth finish prevents fouling.ISO 1302
Weight	15–120 kg	Depends on size and material.
Connection Type	Flanged/Threaded	Flanged for high pressure.ISO 7005
Seal Material	PTFE/EPDM	PTFE for chemical resistance.

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

Distribution Plate Part
Primary surface with patterned holes or channels to create multiple flow paths.

Material: stainless steel
Inlet Connection Flange Part
Interface for connecting the distributor to the vessel's main inlet pipe.

Material: carbon steel or stainless steel
Support Spiders/Legs Part
Structural supports to center and secure the distributor within the vessel.

Material: stainless steel
Spray Nozzles Optional
Break the inlet stream into jets on spray-type distributors, instead of spreading it over a plate.

Applied To / Applications

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

Vessel/Container

View system integration details

Manufacturers of Upper Distributor

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Frequently Asked Questions

What is the typical installation location of an Upper Distributor?

It is installed at or near the top inlet of a vessel or container, where it receives the incoming stream and distributes it evenly across the vessel's cross-section.

What materials are available for the Upper Distributor?

Stainless steel grades SS304 and SS316L are on file, with SS316L recommended for corrosive media. Surface finish can be specified up to Ra ≤ 0.8 μm.

What are the key parameters to consider when selecting an Upper Distributor?

Key parameters include nominal diameter (DN50-DN300), flow rate (10-500 m³/h), operating pressure (1.0-1.6 MPa), temperature range (-20 to 120°C), distribution uniformity (±5%), and connection type (flanged or threaded).

How does the Upper Distributor ensure uniform distribution?

It uses internal features such as perforated plates, spray nozzles, radial arms, or channels to break the incoming flow into multiple smaller streams, spreading them evenly over the vessel's diameter.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 10 bar (150 psi)
flow rate:	0.5-50 m³/h
temperature:	-40°C to 200°C
slurry concentration:	Up to 40% solids by weight

Upper Distributor

Product Specifications

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