INDUSTRY COMPONENT

Gate/Disc

Gate/Disc is the primary sealing element in regulation valves that controls fluid flow by moving perpendicular to the flow direction.

View Specifications

Component Specifications

Definition
The Gate/Disc is a critical component in gate valves and similar regulation valves, consisting of a flat or wedge-shaped plate that slides between two parallel seats. It operates by moving perpendicular to the fluid flow direction, either fully opening to allow unrestricted flow or fully closing to create a tight seal. This component is designed for on/off service rather than throttling, providing minimal pressure drop when open and reliable shut-off when closed. Its precise machining and material selection ensure compatibility with various fluids, pressures, and temperatures in industrial applications.
Working Principle
The Gate/Disc operates on a linear motion principle where it moves perpendicular to the flow path. When the valve stem rotates, it converts rotational motion into linear motion through threads, raising or lowering the gate/disc. In the open position, the gate/disc retracts completely into the valve bonnet, creating an unobstructed flow path. In the closed position, it seats firmly against two parallel sealing surfaces, creating a metal-to-metal or soft-seated seal that prevents fluid passage. The wedge-shaped design provides self-energizing sealing as system pressure increases.
Materials
Common materials include ASTM A216 WCB (carbon steel), ASTM A351 CF8/CF8M (stainless steel 304/316), ASTM A494 CW-6MC (Hastelloy C), and ASTM B62 (bronze). Sealing surfaces may be hardened through stellite overlays (6-12% cobalt-chromium-tungsten alloy) or have PTFE/elastomer inserts for soft-seated applications. Material selection depends on fluid compatibility, temperature range (-29°C to 425°C typical), pressure rating (PN10 to PN100), and corrosion resistance requirements.
Technical Parameters
  • Seat Type Metal-seated or Resilient-seated
  • Stem Type Rising or Non-rising
  • Face-to-Face ISO 5752, API 600
  • Leakage Class API 598, ISO 5208 Rate A to D
  • End Connections Flanged (ISO 7005), Threaded (ISO 7-1), Welded
  • Pressure Rating PN16 to PN100 (ANSI 150 to 600)
  • Temperature Range -29°C to 425°C
Standards
ISO 5208, API 600, API 598, ASME B16.34, ISO 5752

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Gate/Disc.

gate valve disc regulation valve component industrial flow control valve sealing element wedge gate parallel slide gate valve maintenance Gate/Disc Gate/Disc in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Regulation Valve/Gate

A flow control component within a feed regulator system that modulates material passage.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Seat and disc galling in metal-seated valves
  • Stem packing leakage
  • Gate/disc erosion from high-velocity fluids
  • Corrosion in chemical applications
  • Thermal expansion mismatch causing binding
FMEA Triads
Trigger: Improper material selection for fluid service
Failure: Rapid corrosion or erosion of gate/disc surfaces
Mitigation: Conduct material compatibility analysis per ASTM G31, select corrosion-resistant alloys, apply protective coatings
Trigger: Inadequate lubrication of stem threads
Failure: High operating torque leading to stem deformation or seizure
Mitigation: Implement preventive maintenance schedule with high-temperature anti-seize compounds, monitor torque values
Trigger: Solid particle contamination in fluid
Failure: Scoring of sealing surfaces causing leakage
Mitigation: Install upstream filtration (100 micron minimum), use hard-faced seating surfaces (stellite overlay)

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Seating surface flatness: 0.0005 in/in, Stem straightness: 0.001 in/ft, Bore concentricity: 0.002 TIR
Test Method
Hydrostatic shell test at 1.5x rated pressure, seat leakage test per API 598 with test medium appropriate to service

Buyer Feedback

★★★★☆ 4.9 / 5.0 (17 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Gate/Disc meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Gate/Disc arrived with full certification."

"Great transparency on the Gate/Disc components. Essential for our Machinery and Equipment Manufacturing supply chain."

Related Components

Inspection Frame
Structural support component in automated fabric inspection systems that holds cameras, sensors, and lighting for defect detection.
Machine Frame
The rigid structural foundation of a CNC wood router that provides stability, vibration damping, and precision alignment for cutting operations.
pH Sensor Assembly
Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications
Load Cell Assembly
Precision load cell assembly for automated powder dispensing systems

Frequently Asked Questions

What is the difference between wedge gate and parallel slide gate designs?

Wedge gates have tapered discs that provide self-energizing sealing as pressure increases, while parallel slide gates have two parallel discs with spring mechanisms that maintain sealing force regardless of pressure fluctuations.

How often should gate/disc components be inspected?

Inspect annually for wear, corrosion, and sealing surface damage. Replace if leakage exceeds API 598 standards or if erosion reduces sealing surface by more than 20%.

Can gate valves be used for throttling applications?

No, gate valves are designed for full open or full close service only. Throttling causes vibration, cavitation, and premature wear of the gate/disc sealing surfaces.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for Gate/Disc

Gate/Closure Plate Gate/Pusher Arm