Define what the gate must do in the molten-metal channel
A launder gate or dam changes the passage available to molten aluminium inside the transfer channel. Define whether it regulates flow, temporarily retains metal or blocks a route. Its contact parts, mounting and movement must suit the launder geometry, metal level and thermal duty.
Flow-control gates and dams fitted across or within molten-aluminium distribution launders, with their contact body, moving barrier, support and drive. The Distribution Launder page covers the channel system; the Slide gate flow control for molten steel ladles and tundishes page covers refractory plate systems below steel vessels; the Stopper-rod pouring valve page covers bottom-pour dosing into moulds. Food-hopper discharge gates, slurry knife valves and water-channel penstocks are separate products.
CNFX editorial research · Sources checked October 19, 2026 · 3 sources
Specify fine flow regulation separately from a blocked channel
RODABELL lists gates for controlling molten aluminium along a casting line and preventing it from entering unwanted areas. Identify the required function and operating state for each gate location. [1]
CN103878177A describes a specific launder insert with a main passage and a smaller passage adjusted by an actuator-driven valve core. The main passage carries the required base flow; movement of the core provides trim through the smaller passage. A trim arrangement of this kind needs its shutdown function established separately. [2]
Give the supplier the upstream head, downstream level requirements and flow range. Define the permitted residual flow at the specified closed state and the method for isolating equipment during maintenance. Require the approved operating procedure for hot-metal handling.
02
Fit the refractory gate body and supports to the hot channel
AdTech’s launder-dam description separates the contact dam, supporting metal accessories and manual or pneumatic operating device. It also lists electric control options. Obtain the exact assembly and installation drawing for the proposed channel. [3]
Identify the aluminium alloy, metal temperature and operating duration, along with the launder cross-section and refractory condition. Specify the dam/body, moving contact part, mounting and hot/cold clearances together. Request material and coating details for each molten-metal contact surface.
The cited patent matches the insert’s cross-section to the launder and describes a refractory-clay interface. Its actuator is aligned above the moving core on a supported platform. These details belong to that design; agree the offered gate’s sealing interface, drive support and service access from its drawings. [2]
Obtain installation, drying/preheating, inspection and replacement instructions from the equipment and refractory suppliers. Coordinate any cooling or other utilities with the approved molten-metal system design.
03
Coordinate the barrier, drive and position indication
The replacement gate needs both hot contact parts and the mechanical package that moves and supports them.
Where level feedback operates the gate, agree responsibility for the sensor, control logic, drive and line response. Verify the installed relation between gate position, head and flow under the intended casting conditions.
Gate element
Define in the supply schedule
Gate plate / blade or moving flow-control part
Actual barrier/core profile, travel, material and the passage it opens or restricts.
Seal / contact interface
Selected refractory fit or other approved interface, with its hot clearance and residual-flow acceptance.
Actuator mechanism
Manual, pneumatic, hydraulic or electric drive as offered, including force/travel and installation requirements.
Frame / housing
Launder interface, support platform, alignment and thermal shielding as specified.
Position indicator
Actual travel reference, end-position indication and any feedback needed by the line controller.
04
Attach flow and closure requirements to the actual metal duty
Use channel geometry and operating head to define performance. A pipeline valve’s nominal size or leakage class leaves the launder installation to be specified.
Commission the defined regulating and blocking states using the designer’s procedure. Keep the measured conditions and results with the gate/drive identification; agree inspection criteria for deposits, erosion, cracking and restricted movement.
Gate field
State for the offered unit
Nominal size
Launder cross-section, flow passages, mounting envelope and hot/cold fit dimensions.
Flow capacity
Aluminium alloy, temperature, head, gate position and required operating range.
Operating temperature
Molten-metal contact duty and separate limits for supports, bearings, drive and instruments.
Sealing class
Agreed closure/isolation function and applicable acceptance method for this design.
Leakage rate
Residual flow at defined position, metal conditions and head, in explicitly agreed units.
Actuation torque
Required force/torque and stroke for the selected mechanism, including process and friction loads.
Actuator supply voltage
Electrical drive/control supply where fitted; otherwise specify pneumatic/hydraulic utility or manual operation.
Enclosure protection
Drive, switches and junctions at their installed location, separate from hot contact parts.
Body material
Contact body/refractory and supporting metal components identified individually.
Seat material
Specified hot contact/interface construction and its replacement requirements.
Weight
Gate, support and drive mass, with load and access provisions.
05
Prepare a launder gate and operating-state drawing
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Agree the gate and refractory interfaces with the launder supplier
Supply the launder layout and required regulating/blocking states to the gate and refractory designers. Define the hot contact parts, drive, indication and responsibility for installation and commissioning.
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Compiled and source-reviewed by the CNFX editorial team.
The cited supplier pages establish launder gates and dams as product families. Obtain configuration-specific drawings, operating limits and acceptance evidence for the casting line. How we source and review
· Page last updated 19 October 2026
Buyer questions
Does a flow-control gate always block all metal flow?
The cited patent retains a main flow passage and trims a smaller passage. Specify complete blocking separately for the offered design. [2]
Is the gate the same supply as the entire launder system?
RODABELL distinguishes its metal-transfer channels from gates for flow control. Itemize the required gate assembly and channel interfaces. [1]
Which drive is included with a launder dam?
AdTech describes manual and powered options. Confirm the selected drive, support and controls in the actual quotation. [3]
Sources and what still needs a direct check
Sources checked 2026-10-19. RODABELL and AdTech describe their own launder-gate/dam offers. CN103878177A supplies a particular two-passage regulating mechanism, read with its Chinese claim text and translated description. These sources supply no universal closed-state leakage, drive rating or service life for a proposed gate.
