Sluice Gate

A sluice gate is an industrial-grade gate which is used to control the flow rate, water level, and on/off state of fluids (water, sewage, slurry, etc.). It is widely used in water conservancy projects, municipal water supply and drainage, sewage treatment, power generation, mining, and other fields. Its core function is to achieve precise control of the fluid channel through the vertical lifting or horizontal movement of the gate plate. It features strong sealing performance, high pressure resistance, and convenient operation, making it a key component for the safe and stable operation of fluid systems.

1. Structural Type and Material Selection

Structural Classification: By operation method, it is divided into manual Sluice Gate, electric Sluice Gate, and hydraulic Sluice Gate; by sealing method, it is divided into resilient sealing gate and metal sealing gate; by installation method, it is divided into exposed rod type and concealed rod type.

Core Materials:

Gate Plate: Stainless steel (304/316L), carbon steel (Q235B), cast iron (HT200), with customizable anti-corrosion coatings (epoxy resin, polyurethane);

Gate Frame: Welded carbon steel, integrally molded stainless steel, acid and alkali resistant, erosion resistant;

Sealing Components: Nitrile rubber (NBR), fluororubber (FKM), silicone, ensuring zero-leakage sealing effect.

2. Key Technical Specifications

Nominal Diameter (DN): DN100 - DN3000mm (non-standard customization supported);

Nominal Pressure (PN): 0.1MPa - 2.5MPa, with a maximum withstand pressure of 10MPa;

Operating Temperature: -20℃ - 120℃ (special materials can be adapted to low-temperature environments of -40℃ or high-temperature environments of 200℃);

Leakage: Complies with GB/T 13927-2008 standard, elastic seal ≤0.01L/(s・m), metal seal ≤0.1L/(s・m);

Operating Method: Manual (handwheel, chain), electric (motor + reducer, supports remote control), hydraulic (suitable for large-diameter, high-pressure scenarios).

3. Drive System Technical Advantages

Electric Sluice Gate: Equipped with an AC380V/220V geared motor, providing stable torque output, built-in overload protection, and supporting PLC linkage control, with a positioning accuracy of ±1mm.

Hydraulic Sluice Gate: Utilizes a double-acting hydraulic cylinder, with a response speed ≤0.5m/min and pressure loss ≤5%, suitable for harsh working conditions (dust, humidity).

Manual Sluice Gate: Optimized transmission ratio design, operating force ≤50N, suitable for small-diameter, low-frequency operation scenarios.

1. Super-Sealing Leak-Proof Technology

Employs a triple-sealing structure of "gate plate + elastic seal + gate frame stop," with precision-ground sealing surfaces achieving a roughness Ra≤0.8μm, ensuring zero leakage even under high pressure and impurity media, solving the problem of traditional gate seal failure.

 

2. Corrosion and Wear-Resistant Design:

For corrosive media such as sewage and acid/alkali solutions, the gate plate uses duplex stainless steel or carbon steel with a heavy-duty anti-corrosion coating, meeting ISO 12944-6 C5 standards for corrosion resistance. The seals are made of wear-resistant rubber, extending service life by over 30%.

 

3. Structural Strength Optimization:

The gate plate and frame structure are optimized through finite element analysis (FEA), employing a box beam design that increases bending strength by 25%. This ensures no deformation under large diameter (DN2000+) and high-pressure conditions, guaranteeing long-term stable operation.

 

4. Intelligent Control Upgrade (Optional):

The electric version supports remote monitoring (flow rate, water level, gate opening) and can be connected to a SCADA system for automatic start/stop, fault alarm, and data logging, reducing manual maintenance costs.

Water Conservancy Projects: Water level regulation and interception in reservoirs, rivers, and irrigation canals;

Municipal Water Supply and Drainage: Inlet and outlet control of waterworks and sewage treatment plants, and flow regulation of pump stations;

Industrial Sector: Power (cooling water system), mining (tailings transportation), chemical industry (acid and alkali solution transportation), papermaking (pulp fluid control);

Special Scenarios: Fluid flow control for low-temperature (-40℃), high-temperature (200℃), highly corrosive, and high-impurity media. V. Standards & Quality Assurance

Rockerhill Standards:

ISO 5090:2023 - "Sluice gates - Design, manufacturing, installation and testing": The most current and comprehensive global standard covering all critical aspects.

ASTM A36 / A572: Standard specifications for structural steel.

ASTM A240 / ASME SA240: Specification for chromium and chromium-nickel stainless steel plate.

EN 10025: European standard for hot-rolled structural steel products.

GB/T 1220-2007 (Stainless Steel),

GB/T 3091-2015 (Carbon Steel Pipes),

CJ/T 3006-1992 (Water Supply and Drainage Gates),

ISO 6404-2018 (General Standard for Valves);

Quality Assurance: All Sluice Gates undergo a hydrostatic test (1.5 times the nominal pressure), a sealing performance test, and a no-load operation test before leaving the factory. A 12-24 month warranty and lifetime technical support are provided.

 

 

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