INDUSTRY COMPONENT

Upper Plate / Fixed Plate

Upper Plate is a stationary mounting component in flow control devices that provides structural support and sealing surface.

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Component Specifications

Definition
The Upper Plate, also known as Fixed Plate, is a critical structural component in slide gate or stopper rod flow control devices used in industrial processes. It serves as the stationary mounting surface that anchors the device to the pipeline or vessel, providing a rigid foundation for the moving components. This plate maintains precise alignment, ensures proper sealing against the sliding gate or stopper, and withstands operational pressures and thermal stresses.
Working Principle
The Upper Plate functions as the fixed reference plane in flow control mechanisms. It remains stationary while the sliding gate or stopper rod moves against its surface to regulate material flow. The plate's flatness and surface finish ensure tight sealing when the gate is closed, while its mounting holes and alignment features maintain precise positioning relative to the flow path.
Materials
Typically manufactured from carbon steel (ASTM A36), stainless steel (304/316), or wear-resistant alloys. Surface treatments may include hard chrome plating, nitriding, or ceramic coating for enhanced wear resistance.
Technical Parameters
  • Thickness 20-50 mm
  • Surface Finish Ra 0.8-1.6 μm
  • Pressure Rating Up to 1500 psi
  • Temperature Range -20°C to 400°C
  • Flatness Tolerance ±0.05 mm
  • Mounting Hole Pattern ASME B16.5 flange compatible
Standards
ISO 9001, ASME B16.5, DIN 2501

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Upper Plate / Fixed Plate.

upper plate fixed plate flow control component slide gate plate stopper rod mounting industrial valve parts flow regulation equipment Upper Plate / Fixed Plate Upper Plate / Fixed Plate in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Flow Control Device (Slide Gate or Stopper Rod)

A device used to regulate the flow of molten steel from the tundish to the mold during continuous casting.

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Engineering Analysis

Risks & Mitigation
  • Surface wear leading to leakage
  • Thermal distortion affecting flatness
  • Corrosion in aggressive environments
  • Fatigue cracking at mounting points
FMEA Triads
Trigger: Abrasive material flow
Failure: Surface erosion and increased clearance
Mitigation: Apply hard-facing coatings and implement regular surface inspection
Trigger: Thermal cycling
Failure: Warping and loss of flatness
Mitigation: Use materials with matched thermal expansion and incorporate cooling channels

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Flatness within 0.05 mm, parallelism within 0.1 mm, surface roughness Ra ≤ 1.6 μm
Test Method
Surface plate inspection, coordinate measuring machine (CMM), pressure testing per ASME B16.34

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between Upper Plate and Lower Plate in flow control devices?

The Upper Plate is stationary and provides mounting/sealing surface, while the Lower Plate typically moves with the gate mechanism or serves as a wear plate.

How often should Upper Plates be inspected for wear?

Inspect every 6-12 months depending on service conditions. Check for surface scoring, flatness deviation, and seal groove integrity.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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Upper Mold Plate Upper Punch