Industry-Verified Manufacturing Data (2026)

Trays (e.g., Sieve, Valve)

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Trays (e.g., Sieve, Valve) used in the Chemical Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Trays (e.g., Sieve, Valve) is characterized by the integration of Tray Deck and Downcomer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Internal components within a fractionating column that provide vapor-liquid contact surfaces for mass transfer during distillation.

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Product Specifications

Technical details and manufacturing context for Trays (e.g., Sieve, Valve)

Definition
Trays are horizontal plates or decks installed inside a fractionating column that create multiple equilibrium stages for separation. They facilitate intimate contact between rising vapor and descending liquid, allowing components with different boiling points to separate through repeated vaporization and condensation cycles. Common types include sieve trays (perforated plates) and valve trays (with movable caps).
Working Principle
Vapor rises through openings in the tray (holes in sieve trays or under valve caps), bubbling through the liquid accumulated on the tray. This creates froth or spray, maximizing interfacial area for mass transfer. Heavier components condense into the liquid phase while lighter components vaporize, moving upward to the next tray. Liquid flows across the tray via downcomers to the tray below.
Common Materials
Stainless steel, Carbon steel, Special alloys
Technical Parameters
  • Tray spacing typically ranges from 300-900mm depending on column diameter and separation requirements (mm) Per Request
Components / BOM
  • Tray Deck
    Main horizontal plate providing surface for vapor-liquid contact
    Material: Stainless steel
  • Downcomer
    Channel allowing liquid to flow from one tray to the tray below
    Material: Carbon steel
  • Weir
    Retaining wall on tray edge to maintain liquid level
    Material: Stainless steel
  • Valve Units
    Movable caps on valve trays that regulate vapor flow (for valve trays only)
    Material: Special alloys
Engineering Reasoning
0.1-2.0 bar pressure drop per tray, 0.6-1.2 m tray spacing, 0.05-0.15 m weir height
Flooding at 80% of maximum vapor capacity (F-factor > 2.5 Pa^0.5), weeping at liquid flow < 10% of design rate, entrainment > 10% liquid carryover
Design Rationale: Flooding occurs when vapor momentum exceeds liquid gravitational drainage (ΔP > ρ_l*g*h_clear), causing liquid accumulation. Weeping results from insufficient vapor momentum to maintain liquid on tray (F-factor < 1.0 Pa^0.5). Entrainment happens when vapor velocity exceeds droplet settling velocity (vapor > 0.6*sqrt(σ/(ρ_l-ρ_v))).
Risk Mitigation (FMEA)
Trigger Corrosion from chlorides > 25 ppm in feed at temperatures > 150°C
Mode: Tray perforation leading to liquid bypass and reduced separation efficiency
Strategy: Material upgrade to duplex stainless steel (UNS S32205) with 3 mm corrosion allowance
Trigger Thermal cycling between 50°C and 250°C during startups exceeding 100°C/hour
Mode: Thermal fatigue cracking at tray-to-downcomer weld joints
Strategy: Controlled heating/cooling rate < 50°C/hour with finite element analysis-optimized support design

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Trays (e.g., Sieve, Valve).

stainless steel fractionating column trays chemical distillation tray components valve trays for fractionating columns carbon steel sieve trays manufacturing special alloy distillation tray deck

Applied To / Applications

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

Fractionating Column
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Vacuum to 20 bar (typical), up to 50 bar for specialized designs
flow rate: Vapor velocity: 0.1-3.0 m/s (flooding limit dependent on design)
temperature: -50°C to 400°C (dependent on tray material)
slurry concentration: Not applicable for standard trays; specialized designs handle up to 15% solids
Media Compatibility
✓ Hydrocarbon distillation (crude oil, naphtha) ✓ Chemical processing (ethanol-water, acetic acid) ✓ Cryogenic air separation (oxygen, nitrogen)
Unsuitable: Highly corrosive environments with halogenated compounds (e.g., chlorine, fluorine) without specialized metallurgy
Sizing Data Required
  • Column diameter (m) and tray spacing (mm)
  • Vapor and liquid flow rates (kg/hr or m³/hr)
  • Required separation efficiency (theoretical stages or HETP)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fouling and plugging
Cause: Accumulation of solids, polymers, or salts on tray surfaces and openings, often due to inadequate feed filtration, process upsets, or chemical reactions within the column.
Corrosion and erosion
Cause: Chemical attack from process fluids (e.g., acids, chlorides) or mechanical wear from high-velocity vapor/liquid flows, exacerbated by material incompatibility or operational conditions beyond design limits.
Maintenance Indicators
  • Significant increase in column pressure drop or flooding, indicating restricted vapor/liquid flow through trays.
  • Audible rattling or vibration from the column, suggesting loose tray components or structural damage from excessive loads.
Engineering Tips
  • Implement regular chemical cleaning or water washing programs to prevent fouling buildup, and ensure proper feed pretreatment (e.g., filters, desalters).
  • Specify corrosion-resistant materials (e.g., stainless steels, alloys) based on process fluid analysis, and design for adequate weep holes and downcomer clearances to avoid stagnant zones and erosion hotspots.

Compliance & Manufacturing Standards

Reference Standards
ISO 3310-1:2016 (Test sieves - Technical requirements and testing) ASTM E11-22 (Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves) CE Marking (EU Directive 2006/42/EC for machinery safety)
Manufacturing Precision
  • Mesh opening size: +/-2% of nominal aperture for sieves
  • Flatness: 0.05mm per 100mm for valve trays
Quality Inspection
  • Visual inspection under 10x magnification for mesh defects
  • Dimensional verification using coordinate measuring machine (CMM)

Factories Producing Trays (e.g., Sieve, Valve)

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Jan 28, 2026
★★★★★
"Testing the Trays (e.g., Sieve, Valve) now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from Canada Jan 25, 2026
★★★★☆
"Impressive build quality. Especially the technical reliability is very stable during long-term operation. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Jan 22, 2026
★★★★★
"As a professional in the Chemical Manufacturing sector, I confirm this Trays (e.g., Sieve, Valve) meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

12 sourcing managers are analyzing this specification now. Last inquiry for Trays (e.g., Sieve, Valve) from Germany (52m ago).

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Frequently Asked Questions

What are the main components of a fractionating column tray?

The main components include the tray deck (contact surface), downcomer (liquid flow channel), weir (liquid level control), and valve units (vapor flow regulation) for efficient mass transfer.

Which materials are best for chemical manufacturing trays?

Stainless steel offers corrosion resistance, carbon steel provides cost-effectiveness for non-corrosive environments, and special alloys like Monel or Hastelloy handle extreme chemical conditions.

How do trays improve distillation efficiency?

Trays create multiple vapor-liquid contact stages within the column, enhancing separation efficiency through controlled bubbling, weeping prevention, and optimized residence time for mass transfer.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Chemical Manufacturing sector.

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