Selector Grabs

Robust Innovation = Low total cost of ownership.

The by DEMAREC introduced demolition and sorting grabs are a standard to the market nowadays. This proven concept can be widely applied for demolition, recycling and other applications. These grabs have already proven themselves and are in use at many prominent companies in the demolition and recycling industry.

Delta-box frame
In designing this new generation of grabs, DEMAREC has managed to take the gruelling conditions in this field fully into account. The grabs are characterised by their extremely powerful closing strength and the robust construction of the yoke thanks to a Delta-box frame with wide pivotal points using bearings and over dimensioned pins and bearings.
The Delta-box frame in combination with a single large diameter cylinder - for powerful closing - ensures low reactive forces at the hinging points. The application of a single cylinder makes the grab easy to service and reliable because of the simplicity of the hydraulic system. The shells are equipped with a perforated shell plate made of high-grade material as standard. This construction gives extra torsion rigidity to the shells, prevents material getting stuck in the shells and gives optimal visibility on the job. 

Wearing parts
No concessions were made with regard to the wearing parts. The sides and the reversible, divided bottom blades are manufactured of extra thick, durable material. The divided bottom blades can also be interchanged up to 3 times so that wear at the corners can be dealt with and wearing-material is not wasted unnecessarily.

Twin rotation motors and filters
DEMAREC demolition and sorting grabs of the type DRG-28 to 45 are fitted with twin rotation motors for extra rotation power as standard. The DRG-17 to 22 are equipped for this and can optionally be supplied with a second rotation motor for use in special applications. All grabs are also fitted with filters in the rotation circuit as standard.

Working Safely
The application of the standard load safety valve in the grabs open/close circuit ensures safety when working with DEMAREC demolition and sorting graps. For example, unsafe situations when picking up and laying dock boards for example are avoided. Overheating of the oil is also avoided and the machine keeps up its cycle speed. 

 

 

 

 

 

 

 

 

 

 

 

 

DRG-25-DN  Waste Sorting

 

DRG-28-DN  Demolition

 

DRG-28-DN  Waste Handling

DRG-25-DN  Waste Handling

 

DRG-28-DN  Demolition

 

DRG-28-DN  Waste Handling

DRG-28-DN  Wood Handling

 

DRG-22-DN  Heavy Stone

 

DRG-22-DN  Junkyard

 

Main Features

  • Delta-Box Frame with robust end stops
  • Heavy duty rotation motor(s) with shock protection
  • Double roller ring (from DRG-28)
  • Heavy duty side plates from HB500
  • Grease sealed pivot points prevent the ingress of debris
  • Wear blades made from HB500
  • Load safety valve
  • Hydraulic cylinder end damping
  • Bolt on mounting bracket
  • Filters in rotation circuit

Technical data DEMAREC Selector Grabs

Technical data DEMAREC demolition- and sorting grabs
Type  Carrier weight* Weight** Capacity Closing force Opening (mm) A Width (mm) B Height (mm) C
DRG-14  10 - 18 ton 800 kg*** 340 l 43 kN 1730  750  1217***
DRG-15  12 - 20 ton 900 kg*** 415 l 43 kN 1730  900  1217 ***
DRG-17 12 - 24 ton 1030 kg 365 l 50 kN 1757 850  1225
DRG-19 13 - 25 ton 1115 kg 480 l 50 kN 1895 1000  1256
DRG-22 15 - 30 ton 1315 kg 570 l 56 kN 1992 1000  1340
DRG-25 18 - 28 ton 1500 kg*** 650 l 60 kN 2050 1000  1440 ***
DRG-27 20 - 30 ton 1590 kg*** 760 l 60 kN 2050 1200 1440 ***
DRG-28 24 - 40 ton 1820 kg 825 l 70 kN 2193 1100 1393
DRG-36 30 - 50 ton 2210 kg 960 l 80 kN 2325 1250  1481
DRG-45 35 - 60 ton 2330 kg 1075 l 80 kN 2355 1400  1496
DRG-65 50 - 80 ton 4165 kg 1660 l 140 kN 2700 1500  1818

 

Hydraulics

Type  Opening/Closing Pmax Flow Rotation Pmax Flow
DRG-14 350 bar 80 l/min 140 bar 40 l/min
DRG-15 350 bar 80 l/min 140 bar 40 l/min
DRG-17 350 bar 100 l/min 140 bar 40 l/min
DRG-19 350 bar 100 l/min 140 bar 40 l/min
DRG-22 350 bar 100 l/min 140 bar 40 l/min
DRG-25 350 bar 100 l/min 140 bar 40-60 l/min
DRG-27 350 bar 100 l/min 140 bar 40/60 l/min
DRG-28 350 bar 120 l/min 140 bar 40-60 l/min
DRG-36 350 bar 120 l/min 140 bar 40-60 l/min
DRG-45 350 bar 120 l/min 140 bar 40-60 l/min
DRG-65 350 bar 200 l/min 140 bar

40-60 l/min

 

 

*depending on lifting capacity of carrier / ** weight incl. standard bracket
Subject to change without notice.