GS Series Excavator Rotary Trommel Screening Bucket

Product Overview

The GS series excavator rotary trommel screening bucket is a versatile hydraulic drum screening attachment engineered for grading, cleaning, and sorting soil, river gravel, compost, demolition rubble, and quarry rock across 5 to 40-ton excavators. Powered by a high-torque, low-speed hydraulic motor with a dual-speed selection switch, this multi-functional rotary drum screening bucket for excavator enables operators to easily alternate between high and low rotation speeds depending on material density. Engineered with a fully submersible hermetic sealing system, the GS series can operate underwater for canal desilting and wet dredging operations without oil leakage or water ingress. With interchangeable screen mesh panels ranging from 5 mm to 120 mm, this reliable excavator trommel screening bucket maximizes jobsite sorting efficiency and aggregate recovery value.

Excavator Class

16 – 25

Operating Weight

1,600kg

Working Pressure (MPa / bar)

20 / 200

Product Features

Submersible Hermetically Sealed Drive System: Built with an IP-rated multi-stage seal housing around the low-speed, high-torque hydraulic motor and heavy-duty load-bearing support rollers, allowing continuous underwater dredging and wet sediment screening.
Dual-Speed Hydraulic Motor Switching: Features a switchable high/low dual-speed hydraulic circuit, enabling operators to optimize drum rotational velocity for fast dry-soil separation or heavy-duty stone sorting directly from the cabin.
Quick-Interchangeable Modular Screen Panels: The rotating drum utilizes bolt-on, modular wear-resistant screening plates with aperture options from 5 mm up to 120 mm, allowing swift on-site changeovers without specialized tools.
Mortise-and-Tenon Interlocking Welded Construction: Manufactured from high-tensile abrasion-resistant steel plates using precision mortise-and-tenon interlocking welds, eliminating stress concentration points and structural cracking.
Heavy-Duty Low-Maintenance Support Rollers: Reinforced load-bearing support shafts and self-lubricating sealed bearing assemblies distribute dynamic rotating loads evenly, extending service intervals and reducing maintenance downtime.

Applications

River Dredging & Underwater Canal Desilting: Submerged sorting of canal silt, riverbed sand, gravel, and submerged debris directly from water bodies.
Topsoil, Peat & Compost Screening: Aerating and classifying rich topsoil, compost heaps, mulch, and turf beddings for landscaping and agricultural projects.
Quarry & Gravel Grading: Sizing natural river stones, pebbles, crushed aggregate, and quarry overburden into uniform grain classifications.
Demolition Spoil & Waste Sorting: Separating recyclable brick fragments and fine sub-base soil from oversized concrete blocks and timber.
Beach Cleaning & Debris Removal: Sifting coastal sand to remove plastics, driftwood, and solid waste along shorelines.

Product Specifications

Model	Excavator Class (Ton)	Bucket Capacity ( $m^{3}$ )	Operating Weight (kg)	Working Pressure (MPa / bar)	Recommended Flow (L/min)	Screen Aperture Options (mm)
GS-9	5 – 9	0.3	500	20 / 200	60	5 – 50
GS-15	10 – 15	0.4	800	20 / 200	80	5 – 80
GS-25	16 – 25	1.1	1,600	20 / 200	140	5 – 100
GS-35	26 – 40	2.0	2,800	20 / 200	200	5 – 120

Note: Custom drum length, specialized mesh shapes (square/round/slotted), and brand-specific quick-coupler adapter plates are available upon order.

FAQ

Q1: How do I change the screening particle size on the GS series trommel bucket?

A: Sizing adjustment is achieved by replacing the bolt-on modular screen panels mounted around the perimeter of the drum. Standard panel apertures range from 5 mm up to 120 mm. The bolt-on modular design allows quick field replacements without dismounting the bucket or cutting welded structures.

Q2: Can the GS series rotary screening bucket truly work submerged underwater?

A: Yes. The high-torque hydraulic drive motor and heavy-duty load-bearing support roller shafts are equipped with multi-lip underwater-grade mechanical seals. This hermetic construction prevents water and abrasive slurry penetration, making the GS series ideal for canal cleaning, river desilting, and marina dredging.

Q3: What are the primary advantages of the dual-speed hydraulic motor design?

A: The dual-speed control allows operators to adjust the centrifugal force and tumbling action inside the drum. Low-speed mode delivers maximum torque for handling heavy wet clay, rocks, and saturated mud, while high-speed mode accelerates separation and cycle times for dry topsoil, sand, and compost.