Meta Description:​ When it comes to silent hydraulic breaker for medium-sized excavators, the SB81/GCB220 silent box hydraulic breaker from Guchuan Machinery stands out as a game-changer in the industry. Designed to match the quality of world-renowned brands like SB81 while offering more competitive pricing, this equipment redefines efficiency, durability, and noise control for construction, mining, and demolition projects worldwide. As a professional hydraulic breaker manufacturer with over 15 years of experience, we bring cutting-edge technology and rigorous quality control to every unit of the GCB220 hydraulic hammer

SB81 / GCB220 Silence Box Breaker Power Meets Precision for 18-26 Ton Excavators

Why Choose SB81/GCB220? Core Advantages That Matter

In today’s demanding job sites, contractors and equipment managers prioritize three key factors: performance, cost-effectiveness, and compliance with environmental regulations. The SB81/GCB220 excels in all these aspects, making it the preferred choice for 18-26 ton excavator hydraulic breaker applications:

• Ultra-Quiet Operation: With a noise level of only 118DB, this silent box hydraulic breaker features advanced sound insulation technology—including a reinforced noise-dampening housing and shock-absorbing components—that significantly reduces operational noise compared to standard breakers. It’s ideal for urban construction, residential area renovations, and indoor demolition projects where noise restrictions are strict .

• Exceptional Impact Power: Boasting 4067 Joules of impact energy and an impact rate of 350-500 Bpm, the GCB220 delivers powerful, consistent blows to break through hard rock, reinforced concrete, and asphalt. Its optimized piston design and high operating pressure (160-180 Bar) ensure maximum energy transfer with minimal energy waste .

• GCB220 uses the same premium-grade steel for the cylinder and 140mm tool diameter chisel, along with high-pressure seals from international suppliers. We eliminate brand premiums while maintaining identical performance, helping you cut equipment costs by 15-25%.

• Intelligent Auto-Frequency Technology: Equipped with our independently developed auto-variable frequency hydraulic system, the breaker automatically adjusts its impact rate based on the material hardness—faster for brittle materials and slower for hard rock. This not only boosts efficiency but also reduces wear on internal components .

• Extended Service Life & Warranty: Our rigorous testing process (including 100-hour continuous operation tests) ensures reliability. Backed by a 12-18 month warranty, the SB81/GCB220 minimizes downtime and maintenance costs, providing long-term value for your investment.

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Technical Principles: How the SB81/GCB220 Delivers Superior Performance

The SB81/GCB220 hydraulic breaker operates on the principle of converting hydraulic energy into mechanical impact energy—leveraging the incompressibility of hydraulic oil to drive high-frequency piston movement . Here’s a breakdown of its technical highlights:

1. Pure Hydraulic Drive System: Unlike pneumatic alternatives, our pure hydraulic design ensures stable power output with lower energy consumption. The breaker requires an oil flow of 120-180 l/min and a setting pressure of 210-230 Bar, perfectly matching the hydraulic systems of 18-26 ton excavators (such as Caterpillar 320, Komatsu PC200, and Hyundai R220).

2. Energy-Saving Design: The integrated pressure relief valve prevents overloading, while the optimized oil circuit reduces pressure loss. This translates to lower fuel consumption for the excavator and extended service life for both the breaker and the host machine.

3. Silent Box Structure: The fully enclosed housing not only blocks noise but also protects internal components from dust, debris, and harsh weather—critical for demanding environments like mines and construction sites.

Versatile Applications: Where the SB81/GCB220 Excels

As a versatile medium-duty hydraulic breaker, the SB81/GCB220 is engineered to handle a wide range of tasks across multiple industries. Its adaptability and performance make it suitable for:

• Construction & Demolition: Breaking concrete structures, foundations, and old buildings in urban areas (complies with most European and North American noise regulations).

• Mining & Quarrying: Secondary breaking of limestone, granite, and other hard rocks in small to medium quarries.

• Infrastructure Construction: Road and railway construction—breaking asphalt, compacted soil, and rock for subgrade preparation.

• Utility & Municipal Works: Trenching for water, gas, and electrical lines; breaking concrete pavements and sidewalks with minimal disruption to surrounding areas.

• Scrap Metal Processing: Breaking and sorting scrap steel and other metal structures in recycling yards.

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