Hydraulics - Import export

We build entire plants and components for your recycling process line: separating – washing – conveying – processing METZEN provides you with machinery and complete plants for plastics recycling, e.g., for agricultural films, PET bottles, mixed municipal waste and much more. We build components for every stage of your process line: separating – washing – conveying – processing

Korzonek Klarwerkstechnik, METZEN’s sewage treatment branch, has been a competent and trusted sewage engineering partner to local authorities, wastewater companies and industrials for over 30 years. We design and manufacture custom spare parts for all scrapers and refurbish them to guarantee their long service life. Longitudinal scraper chassis Circular scraper chassis Drive wheel with direct drive for circular scrapers Rack-and-pinion drive chassis Rack-and-pinion rails Longitudinal scraper chassis with stabilising cross beam and rail drive Rack-and-pinion drive with rail impeller Bolt rail for rack-and-pinion drive Rail longitudinal scraper chassis with synchronously controlled drive Pivot bearings and slip ring systems We manufacture and assemble pivot bearings and slip ring systems with hose swivel joints or without hose access. Scraping blades for longitudinal and circular scrapers We manufacture and assemble single and multi-piece scraping blades.

Overview of the main motor grab features for which we offer spare parts: Grab shells All bearings Hydraulic cylinders Control blocks Hydraulic pumps Motors Suspension

Overview of the main rope grab features for which we offer spare parts: Grab shells All bearings Pulleys Guide rollers Suspension

We are well prepared for quick repairs, which means shorter downtimes for our clients. We know what downtime means for our customers. Which is why we develop and manufacture superior, robust products. Our maintenance-free rope and motor grabs contribute to both environmental protection and economic efficiency. Because maintenance-free means no need for lubricants, no time spent greasing and no wear. However, even our KROGER grab sometimes require spare parts, inspections or repairs after repeatedly lifting maximum loads. We are here to help you when you need it. We can guarantee quick repair as we always have access to our KROGER grab ’ spare parts. We will ship the required parts to you as quickly as possible. The use of original KROGER spare parts can improve your grabs’ long-term performance. Please refer to your grab’s technical documentation for its spare parts delivery scope.

Competent, reliable and efficient. As experienced grab systems specialists, we professionally repair and restore all makes of grabs. We always have the main spare parts for KROGER rope and motor grabs in stock in our warehouse, whether you require them for a revision, quick on-site damage repair, repairs caused by wear-and-tear or refurbishment. We either make quick repairs on site or take your machinery to our workshop for more comprehensive refurbishments. Contact us, we will be happy to advise you.

We design, develop and manufacture industrial load handling equipment. We stand for expertise, innovation and diligence and permanently strive for quality. Creativity and solid design are the cornerstones of our company philosophy. Trust us with your problems and profit from our expertise. We will find the right custom solution for your needs – a solution which will stand the test of time. A selection of our products: Ladle hooks up to 250t Slab tongs up to 40t Own weight Coil clamps Cable drums Bottom blocks Crossbeams Crane trolleys up to 6m x 5m

Ideal for use in refuse-derived fuel (RDF) incineration plants for the handling of materials such as wood chips, shredded plastic or tires, paper and cardboard scraps, pellets and/or fluff. Mainly used in cement, paper and industrial plants (high heat-value areas). Technical design Optimisation of crane load capacity thanks to its lightweight design which can hold maximum loads Both motor grab systems (MZG and MMGM) can be made fully automatic by attaching sensors MZG is ideal for use in tight spaces Lightweight design for high load capacity Size, measurements and grab suspension can be customised according to your needs Further advantages: see type MZG port and type MMGM (under “products/motor grab systems) Grab drive Vertical electrohydraulic drive unit with high-pressure pump Turn control or valve control

Refuse-derived fuel (RDF) is no problem for our KRÖGER grab systems. They can be specially modified for RDF and their compact design makes them suitable for fully-automatic operation in tight spaces. And, of course, they are maintenance-free.

Handling general scrap, steel chips, shredder scrap, wood chippings and much more, in sea and inland ports and at storage facilities. For various types of handling machinery (mobile, stationary, crawler or portal) designed to be connected to hydraulic attachments. Technical design Open, half-closed or closed grip; with 2, 4 or 5 shells Optimisation of machine load capacity thanks to its lightweight design which can hold maximum loads Grab drive: Hydraulic hoses connect the materials handling machine to the grab Closing and opening movements are controlled by the materials handling machine Closing and opening movements controlled by directly connected hydraulic cylinders Grab connection bearing Re-greaseable, robust steel bushing bearing Stable, torsion-resistant shells made of: Shell plates made of S355J2+N Welded shell tips made of special highly wear-resistant steel

Bulk handling of any kind in sea and inland ports or storage facilities. For ship-to-ship, ship-to-storage/wagon/silo handling. For various types of handling machinery (mobile, stationary, crawler or portal) designed to be connected to hydraulic attachments. Technical design Half-closed or closed grip; with 2 or 4 cylinders Optimisation of machine load capacity thanks to its lightweight design which can hold maximum loads Grab drive: Hydraulic hoses connect the materials handling machine to the grab Closing and opening movements are controlled by the materials handling machine Closing and opening movements controlled by directly connected hydraulic cylinders Grab connection bearing Re-greaseable, robust steel bushing bearing Stable, torsion-resistant shells adapted to material flow: Shell plates made of S355J2+N Cutting edges made of special, highly wear-resistant steel

Hydraulic grab systems: efficiency is important for successful cargo handling. Our KROGER grabs with hydraulic technology improve your handling systems’ efficiency in multiple ways. Speed and long service life are recognised worldwide as the key factors for this efficiency. Our hydraulic grabs’ lightweight design, which optimises the machines’ load capacity and therefore maximises their handling scope, is also crucial, and part of KROGER’s measurable added value. Our variety of specific grab types and sizes – from the smallest standard hydraulic grabs to large, custom grabs – increases your efficiency and profitability with every lift.

Underwater gravel and sand extraction using dredgers with 2-cable or 4-cable winches. Suitable for use in all river and lake dredging areas with difficult ground conditions and deep dredging depths. Technical design MAINTENANCE-FREE design, which benefits both the environment and your profitability High load capacity thanks to its lightweight design Robust, torsion-resistant grab design for maximum loads Grab shells made of wear-resistant fine-grain steel Tooth tips are interchangeable depending on ground conditions KROGER MAINTENANCE-FREE bearing system in the shell pivots and cylinder rod bearings KROGER power unit is easy to service, the crosshead engine is separate from the hydraulic tank, hydraulic units are in the tank Environmentally friendly hydraulic fluid using organic oil

Slag handling in waste incineration plants or incineration plants of any kind. For various types of cranes with internal or external holding cables. Technical design Designed as a discharge grab with stable, retracted pivot bearings Optimisation of crane load capacity thanks to its lightweight design which can hold maximum loads Self-locking grab suspension for crane hooks Grab drive: Vertical electrohydraulic drive unit with high-pressure pump Closing and opening movements are controlled through clockwise or counter clockwise rotation of the electric motor (turn control). The electric motor is only switched on whilst the closing and opening movement is being performed. Closing and opening movements controlled by directly connected hydraulic cylinders, with stable piston rod protection Grab connection bearing Re-greaseable, robust steel bushing bearing KRÖGER MAINTENANCE-FREE bearing system Grab shells: Shell design adapted to material flow Toothed segment drive Material: S355J2+N

Waste incineration plants, refuse-derived fuel (RDF) incineration plants or incineration plants of any kind. For various types of cranes which operate using hooks or rope/chain suspension. Technical design Open shell design Suitable for handling all kinds of waste Optimisation of crane load capacity thanks to its lightweight design which can hold maximum loads Self-locking grab suspension for crane hooks Grab drive: Vertical electrohydraulic drive unit with high-pressure pump Closing and opening movements are controlled through clockwise or counter clockwise rotation of the electric motor (turn control). The electric motor is only switched on whilst the closing and opening movement is being performed. Closing and opening movements controlled by directly connected hydraulic cylinders, with stable piston rod protection Grab connection bearing: Re-greaseable, robust steel bushing bearing KRÖGER MAINTENANCE-FREE bearing system Stable shell structure with shells made out of S355J2+N

Bulk handling of any kind in sea and inland ports or storage facilities. The compact alternative to the MZG type grab for ship-to-ship, ship-to-storage/wagon/silo handling. For various types of crane with control systems designed for hydraulic motor grab systems. Technical design Designed as a discharge and ship unloading grab with retracted pivot bearings for easy grab under the ship’s gangway Optimisation of crane load capacity thanks to its lightweight design which can hold maximum loads Self-locking grab suspension for crane hooks Grab drive: Horizontal electrohydraulic drive unit with high-pressure pump Closing and opening movements are controlled through clockwise or counter clockwise rotation of the electric motor (turn control). The electric motor is only switched on whilst the closing and opening movement is being performed. Grab shells: Material: S355J2+N Grab connection bearing: re-greaseable, robust steel bushing bearing Small grab dimensions thanks

Handling timber, stacked wood, etc., for downstream industries, in sea and inland ports or at storage facilities. For ship-to-ship, ship-to-storage/wagon/lorry handling. For various types of crane with control systems designed for hydraulic grab systems. Technical design Designed to grip stacked wood, with two interlocking shells to grip one or several logs Optimisation of crane load capacity thanks to its lightweight design which can grip maximum amounts Slim shell design for optimal penetration Wear-resistant cutting edges The hydraulic system’s dimensions, short open and close times and high closing pressure guarantee the quick grab and secure hold of the logs Protected and easily accessible inbuilt electro-hydraulic propulsion motor Closing and opening movements are controlled through clockwise or counter clockwise rotation of the electric motor (turn control). The electric motor is only switched on whilst the closing and opening movement is being performed.

Bulk handling of any kind in sea and inland ports or storage facilities. For ship-to-ship, ship-to-storage/wagon/silo handling. For various types of crane with control systems designed for hydraulic motor grab systems. Technical design Designed as a discharge and ship unloading grab with retracted pivot bearings for easy gripping under the ship’s gangway Optimisation of crane load capacity thanks to its lightweight design which can hold maximum loads Grab drive: Vertical electrohydraulic drive unit with high-pressure pump Closing and opening movements are controlled through clockwise or counter clockwise rotation of the electric motor (turn control). The electric motor is only switched on whilst the closing and opening movement is being performed. Grab connection bearing: Re-greaseable steel bushing bearing Stable, torsion-resistant design using direct cylinder linkage

Motor grab systems. A wide range of maintenance-free products Manufactured for tough yet smooth bulk load handling – in sea and inland ports, gravel and sand extraction, and waste processing – our KRÖGER motor grab systems are available in a variety of designs and all come with the KRÖGER “maintenance-free” advantage. To protect the environment and maximise your efficiency.

Underwater gravel and sand extraction using dredgers and rope excavators with 2 or 4 ropes. Suitable for use in all river and lake dredging areas with difficult ground conditions and at dredging depths of over 100m. Technical design MAINTENANCE-FREE design, which benefits both the environment and your profitability 5-rope or 7-rope reeving design in all sizes Larger capacity for increased output Lightweight design, optimised grip Closing rope infeed in star form on the grab head with the KRÖGER MAINTENANCE-FREE, rope-protecting pulley system Fixed linkage steering on one side of the grab head KRÖGER MAINTENANCE-FREE pulley block system Grab shells made of wear-resistant fine-grain steel Grab connection bearing with the KRÖGER MAINTENANCE-FREE bearing system Tooth tips are interchangeable depending on ground conditions

Waste incineration plants, refuse-derived fuel (RDF) incineration plants or incineration plants of any kind. For various types of cranes with internal or external holding ropes. Technical design Low-maintenance or maintenance-free for increased profitability 4-rope grab with half-closed grip Suitable for handling waste of any kind Closing rope devices: Rope nozzles KROGER MAINTENANCE-FREE, rope-protecting, roller-bearing pulley system Rigidly mounted main casing to accommodate the lower rope pulleys, easily move the ropes and reduce wear on them even when the crosshead is at an angle whilst the grab is being operated Solid, removable rope guards Rope pulley bearing: Re-greaseable plain bearing KROGER MAINTENANCE-FREE pulley block system Grab connection bearing: Re-greaseable steel bushing bearing KROGER MAINTENANCE-FREE bearing system Stable shell structure with shells made out of S355J2+N with a wear-resistant edge recessing made of Pantanax steel

Slag handling in waste incineration plants or incineration plants of any kind. For various types of cranes with internal or external holding ropes. Technical design Low-maintenance or maintenance-free for increased profitability Transverse or longitudinal suspension with 4-fold, 5-fold and 7-fold rope reeving; as a 4-rope grab High load capacity thanks to its lightweight design Smooth grab thanks to its low centre of gravity and because the rope’s diameter matches that of the pulley Closing rope devices: Rope nozzles KROGER MAINTENANCE-FREE, rope-protecting, roller-bearing pulley system Lower pulley block unrestrained on the crossbeam Rope pulley bearing: Re-greaseable plain bearing KROGER MAINTENANCE-FREE pulley block system Grab shells: Material: S355J2+N Cutting edge material: special, highly wear-resistant steel Grab connection bearing: Re-greaseable steel bushing bearing KRÖGER MAINTENANCE-FREE bearing system

Handling general scrap, car bodies, steel chips, shredder scrap, paving stones and much more, in sea and inland ports. For pier engineering and riverbed maintenance. For various types of cranes and excavators with internal or external holding ropes. Technical design As 2-rope and 4-rope grabs with open, half-closed or closed grip Suitable for handling scrap, stones, waste and other difficult to grab goods depending on design Closing rope devices: Rope nozzles KRÖGER MAINTENANCE-FREE, rope-protecting, roller-bearing pulley system Rigidly mounted main casing to accommodate the lower rope pulleys, easily move the ropes and reduce wear on them even when the crosshead is at an angle whilst the grab is being operated Rope pulley bearing: Re-greaseable plain bearing KRÖGER MAINTENANCE-FREE pulley block system Grab connection bearing: Re-greaseable steel bushing bearing KRÖGER MAINTENANCE-FREE bearing system Stable shell structure with shells made out of S355J2+N.

For bulk handling of any kind up to 2,000 kg/m3 in inland ports, especially suitable for unloading narrow shipping spaces. For ship-to-ship, ship-to-storage/wagon/silo handling. For various types of crane with internal or external holding ropes, exclusively for transverse suspension. Technical design Low-maintenance or maintenance-free design, which benefits both the environment and your profitability Transverse or longitudinal suspension with 3-fold, 4-fold and 5-fold rope reeving; as 2-rope and 4-rope grabs High load capacity thanks to its lightweight design Smooth grab thanks to its low centre of gravity and because the rope’s diameter matches that of the pulley Retracted pivots for easy grab under the ship’s gangway Large plastered surface to grip the residual charge Closing rope devices: Rope nozzles KROGER MAINTENANCE-FREE, rope-protecting, roller-bearing pulley system Lower pulley block unrestrained on the crossbeam Rope pulley bearing: Plain bearing

Bulk handling of any kind in sea and inland ports or storage facilities. For ship-to-ship, ship-to-storage/wagon/silo handling. For various types of crane with internal or external holding ropes. Technical design Low-maintenance or maintenance-free design, which benefits both the environment and your profitability Transverse or longitudinal suspension with 3-fold, 4-fold and 5-fold rope reeving; as 2-rope and 4-rope grabs High load capacity thanks to its lightweight design Smooth grab thanks to its low centre of gravity and because the rope’s diameter matches that of the pulley Retracted pivots for easy grab under the ship’s gangway Large plastered surface to grip the residual charge Closing rope devices: Rope nozzles KROGER MAINTENANCE-FREE, rope-protecting, roller-bearing pulley system Lower pulley block unrestrained on the crossbeam Rope pulley bearing: Plain bearing KROGER MAINTENANCE-FREE pulley block system Grab shells: Material: S355J2+N

Our KROGER rope grabs are used on cranes for gravel extraction, port handling and waste processing to lift high and even maximum loads. They are individually designed for 2-point or 4-point suspensions. Their clamping force equally varies, with 3 to 7-fold reeving. All KROGER grabshave low-maintenance or maintenance-free design, which benefits both the environment and your profitability.

Gravel extraction: KROGER grabs dredgers and rope extravators allow you to extract gravel and sand from rivers or lakes and have been used for this purpose in the toughest conditions across Europe for over 50 years. Thanks to our maintenance-free underwater motor and ropemechanical grab systems, you can extract gravel and sand in new locations whilst complying with environmental regulations and increasing your profitability. Our grabs are particularly suitable for use on difficult terrain and at extreme depths. Our latest record also bears witness to this: our experience paid off when KROGER grab became the European champion with a dredging depth of 177 meters during excavation in Lake Lucerne. Reliability matters – even when extracting gravel and sand at new depths.

Energy production from biomass and waste is on the rise throughout Europe and the world. KROGER has been an established, reliable partner in this sector for many years. KROGER’s maintenance-free grab systems are especially advantageous in both safety and economic terms when used in waste incineration plants, refuse-derived fuel (RDF) incineration plants, combined heat and power (CHP) plants and slag handling. In these extremely difficult, hard-to-access environments, maintenance or lubrication work is costly and often risky for service technicians. KRÖGER offers rrope or motor grabs for a variety of different cranes for use in this particular industry.

Quick port handling – and therefore the reduction of the time that ships spend in port – is a priority for all port operators, regardless of the port’s size and whether it is at sea or inland. This largely depends on the reliability, robustness, and low maintenance requirements of the handling equipment used. KRÖGER’s different grab systems are ideal for the tough 24-hour working reality of ports and for almost all handling requirements. We are also extremely well equipped to design individualised grabs to meet specific requirements. Depending on the handling system, our grabs are equipped with hydraulic, electro-hydraulic or mechanical rope drives. They can therefore be used to unload small inland ships and large seagoing vessels, as well as for bulk cargo handling of any kind.