Screed
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This page explains how Extensions/Hydraulic Extensions is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
Hydraulic extension components for screed systems that provide adjustable width and height capabilities for concrete paving operations.
Technical details and manufacturing context for Extensions/Hydraulic Extensions
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Extension Stroke | 250–1000 mm | Determines paving width adjustment range |
| Cylinder Bore Diameter | 50–100 mm | Affects force output and extension speed |
| Rod Diameter | 25–60 mm | Influences buckling strength and stability |
| Max. Extension Force | 50–200 kN | Must exceed screed weight and paving resistance |
| Operating Temperature Range | -20–80 °C | Seals and hydraulic fluid degrade outside this range |
| Sealing Standard | ISO 6149 | Ensures leak-free connectionsISO 6149 |
| Material Grade | 45# | High-strength carbon steel for cylinder bodyGB/T 699 |
| Surface Treatment | Hard chrome 20–30 μm | Enhances wear resistance and corrosion protection |
| Weight | 50–200 kg | Affects transport and installation logistics |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
| pressure: | Max 300 bar |
| flow rate: | 10-60 L/min |
| temperature: | -20°C to 80°C |
| slurry concentration: | Max 40% solids by volume |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
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Hydraulic extensions allow the screed to adjust its working width and height, enabling precise control over concrete slab thickness and surface leveling. They are critical for achieving uniform concrete placement in road construction, bridge decks, and large slab applications.
The operating pressure is typically 1.0–1.6 MPa, and the operating temperature range is -20 to 80 °C. These are reference ranges; verify model-specific values with the manufacturer.
Selection depends on required paving width adjustment (extension stroke), slab thickness, and site conditions. Consider the maximum extension force, cylinder bore, and rod diameter to ensure adequate force and speed. Always verify parameters with the legal manufacturer or supplier.
Signs include hydraulic fluid leaks, reduced extension speed, or unusual noises during operation. These may indicate seal wear, hydraulic system problems, or contamination. Regular inspection and adherence to operating limits are recommended.
This component is essential for the following industrial systems and equipment:
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