GH-9000 Automatic Level Control Gate

Effortless Upstream Water Level Management

The Model GH-9000 Level Control Gate provides reliable, automated water level regulation without the need for external power. Its innovative force-balance control system maintains a constant upstream water level at any given discharge, minimizing head loss and optimizing flow efficiency. Available in stainless steel or mild steel, the GH-9000 is offered in various sizes to accommodate flow rates from near zero up to 2,000 cfs. At low discharge, the gate nearly closes; as the flow increases, the gate progressively opens to meet changing demands.

Unmatched Operational Simplicity and Efficiency

Unlike traditional solutions, the GH-9000 requires no motors, PLC relays, or modulating actuators. Once the initial adjustments are made, it operates without manual intervention—significantly reducing maintenance, energy use, and replacement costs. These benefits translate into substantial lifecycle savings and a simplified, more cost-effective water distribution network. By eliminating the need for continuous manual adjustments, such as raising flashboards or dispatching ditch riders, the GH-9000 creates a more accurate, flexible distribution system. Year-round, instant response prevents overtopping damage and conserves both time and water.

Operating Principles

The GH-9000 innovative design centers on a radial gate leaf with an upstream buoyancy compartment and rear ballast containers. Together, these components form a rigid frame that pivots smoothly around a horizontal trunnion axis. The hydraulic thrust on the gate leaf aligns with the trunnion axis, ensuring equilibrium remains unaffected by changes in flow.

• Balance and Stability: The combined torques of hydraulic force, buoyancy, and gate weight are always equal and opposite, maintaining perfect balance at any angular position.

• Easy Set-Up: By positioning the trunnion axis at the desired maximum upstream water level, the gate automatically adjusts its angle as flow conditions vary, passing only the discharge required to keep the upstream water level constant.

• Scalable Design: Various models of the GH-9000 are geometrically similar and designated by a “US” dimension index (see size chart, page 5), designed to accommodate a wide range of trapezium-shaped sluiceways and other channel configurations.

Key Features

• Self-Adjusting Design: Operates without external power or motors.

• Consistent Upstream Level: Automatically maintains accurate water elevations.

• Broad Selection of Sizes: 21 standard sizes tailored to diverse flow requirements.

• Versatile Applications: Ideal for flood control, water management, irrigation, flow equalization, UV level control, and clarifier odor control in both water and wastewater facilities.

Experience the simplicity, reliability, and long-term savings of the GH-9000 Automatic Level Control Gate. Contact Golden Harvest, Inc. today to learn how this innovative solution can transform your water management operations.