Unfortunately the Donati DLK is no longer available. It has been superseded by the Donati DMK electric chain hoist

Top quality product for capacities of up to 2000 kg.

• The DLK electric chain hoists respond to the needs of the international market which require products of guaranteed quality with a wide  range of uses, long-term reliability, safety guarantees in all phases of operation, and convenient value for money.

Innovative concept, safe and reliable technical solutions, compact and modern design.

• The DLK hoist, one chain fall for up to 2000 kg, is safe because it eliminates any cause of danger, thanks to the absence of any return. The single chain fall eliminates one of the major wear causes, increasing the durability of the mechanisms, reducing interventions and maintenance costs, and guaranteeing reliable operation.

• Alternative three phase 400V (+/- 10%) - 50Hz as per IEC 38-1

Protection and Insulation of the Electrical Components

• IP55 Enclosure - "F" class insulation hoist and trolley's motors.
• Limit switches: minimum enclosure IP65 - Max. insulation voltage 500V
• Cables: CEI 20/22 II - Max. insulation voltage 450/750 V

Standard Supply Includes

• Chain for 3m lifting height and 2m push button cable.
• Chain box up to 3m of lifting height.
• Electric low voltage control 48V
• Clutch device (up to 2000kg).
• Electromechanical overload device and raise/lower limit switches (over 2000kg).
• Push button panel with cable directly wired inside the control box.
• Line contactor by start/stop mushroom on the push button panel.
• Assembly of all components.
• Packing in carton box.

The warranty lasts 2 years from the delivery date.

• The DLK hoists stand out for their careful and modern design putting them at the top of their category. The quality of the components, the high technology used in the production of the mechanical parts, in the finishes and in the surface treatments, the constant and checked quality system UNI EN ISO 9001 which covers the company’s entire production, allow DONATI SOLLEVAMENTI to offer a product in line with the latest international standards. The special water-repellent paintwork is obtained with an electrostatic process in complete isolation which guarantees its durability and a constant high performance, also in particularly hostile environments. The DLK electric chain hoists are part of the lifting products range manufactured by DONATI SOLLEVAMENTI, a leading company in its field in Italy, and one of the leading companies in the world in the lifting equipment sector.

The Range

The standard range of DLK electric chain hoists are manufactured in 4 sizes, DLK 1, 2, 3 and 4. For capacities between 125 and 2000 kg; FEM classification 2m; two hoist speeds:

• Main speed between 4 and 8 m/min.
• Auxiliary speed between 1 and 2.5 m/min.

Standard Configurations

The flexibility of utilisation of DLK hoists allows 3 standard configurations:

1. Fixed execution: eye-bolt suspension as a standard, or hook suspension on request.
2. Hand-pushed trolley configuration: horizontal movement pushing the load. It is recommended for light duty and short load travel only.
3. Electrically-operated trolley configurations: this version is recommended when manual load pushing is not feasible, and for heavy duty. The load is moved by the trolley which is controlled by the hoist push-button panel.

One single chain fall for capacities up to 2000 kg: the safest way to lift

The single chain fall solution is better than the two chain falls for many reasons:

• Increased safety: the operator can touch the hook and chain without dragging or crushing risks.
• Increased reliability and reduced maintenance: the absence of return eliminates the main causes of wear and jamming.
• Reduced overall dimensions and increased hook run: by eliminating the return, the hoist and chain box overall dimensions are reduced,  while, on the other hand, the hook run is increased.
• Reduced operating costs: chains and pulleys with return are among the most expensive spare parts of the elec- tric hoist.
• Increased use flexibility: the hoist becomes more versatile, with the chain outlet in any direction and control of the hook run levels.

Conformity To Norms and Regulations

DLK electric chain hoists and trolleys are designed and produced following the “Essential Safety Requirements” of Enclosure I of the Community Directive 2006/42/CE.

Regarding what was stated in Enclosure II of the Directive 2006/42/CE, the hoist can be put on the market having the CE Marque and the EC Declaration of Conformity - Enclosure II A.

Reference Frame

The design and manufacture of DLK electric chain hoists conform to the following rules and technical regulations:

• EN ISO 12100 parts: 1a - 2a/2005 “Safety of the machinery”
• EN ISO 13849-1/2008 “General principles for design”
• EN 12077-2/2008 “Limiting and indication device”
• EN 60204-32/98 “Safety of machinery electrical equipment of machines”
• EN 60529/92 “Degrees of protection provided by enclosures (IP code)”
• ISO 4301-1/86 “Lifting equipment classification”
• DIN 15401 “Lifting hooks for lifting appliances; Single hooks”
• FEM 1.001/98 “Rules for the design of hosting appliances”
• FEM 9.511/86 “Classification of mechanisms”
• FEM 9.671/88 “Chain qualities, selection criteria and requirements (for chain hoists DLK series)”
• FEM 9.683/95 “Selection of lifting and travel motors”
• FEM 9.755/93 “Measures for achieving safe working periods for serial hoists units” (S.W.P)
• FEM 9.941/95 “Graphical symbols for control devices”

Protection and Insulation of Electrical Parts

Standard supply:

• Electric-braking hoist and self-braking translation motor: Protection IP55 – Insulation class “F”
• Limit switch: Minimum protection IP65 – Maximum insulation voltage 500 V
• Cables: CEI 20/22 II - Maximum insulation voltage 450-750 V

Electrical power supply

The DLK electric chain hoists are designed to be powered with alternate current with:

• Three-phase voltage of 400V–50 Hz / on request 415V–50 Hz according to IEC 38-1.

Nominal conditions of use in standard execution

• Temperature of use: minimum –10° C; maximum +40° C
• Maximum relative humidity: 80%
• Maximum altitude 1000 m above sea level.
• The machine must be placed indoors, in a well-ventilated place free of corrosive vapours (acid vapours, saline mist, etc).

Noise

• The level of acoustic pressure emitted by the hoist at full load is always less than a level of 85dB(A). The incidence of environmental characteristics such as sound transmission from the ground through metallic structures, reflections caused by combined machines and walls is not included in the level indicated.
• The vibrations produced by the hoist are not hazardous to the health of the personnel operating it.

Service Unit Classification

The DLK electric chain hoists and the associated electric trolleys are sized to operate according to the service unit classification 2m (according to FEM 9.511/86); corresponding to ISO-M5 (according to ISO 4301/88); motor sizing: FEM 9.683/95.

Parts of The Electric Hoist

Reduction Gear:

Epicyclic crown wheel with heat-treated high-strength steel gearing supported by oil-bath lubricated ball bearings. Noise level at full load is less than 85 db. The aluminium casing is finned externally for more effective heat dissipation by radiation.

Electric Motor:

Three-phase asynchronous two-pole motor with cylindrical rotor.

Electromagnetic Brake:

Electric brake installed on the end of the motor shaft, with braking surface acting simultaneously onto two steel discs, thereby allowing a quick,  immediate and safe brake.

Chain:

The chain is gauged and made of high strength steel rod having an ultimate tensile strength of 80 kg/mm2, and ultimate elongation higher than  10%.The applicable safety coefficient is always better than 5 [RES. 4.1.2.4 - Machinery Directive]. The heat and galvanising treatments applied to the chain ensure high resistance to wear, aging and corrosion.

Load Sprocket:

The load sprocket is heat treated, and has five pockets. The pockets are machined by use of precision machinery. The sprocket drives the chain,  and ensures optimized chain motion.

Chain Guide (inserter/extractor):

This component provides for insertion and extraction of the chain links into and from the pockets of the load sprocket, both in ascent and descent  [RES. 4.1.2.4 - Machinery Directive].

Load Hook:

The hook, made of high strength forged steel, is fitted with a safety device [RES. 4.1.2.6 e - Machinery Directive], and rotates on a thrust bearing.

Bottom Block:

it connects the hook to the revolving chain, made of light alloy, sizes 1-2-3, and steel, size 4; it is equipped with a highly-resistant steel chain  locking pin.

Chain Stops:

The stop is fitted on the dead end of the chain to ensure the chain does not drive through the hoist.

Chain Box:

The chain box is available in several sizes as a function of hook travel. It is made of shock-resistant plastics and is fitted with suspensions which ensure freedom of movement.

Clutch Device:

The clutch is an emergency device that replaces the traditional electrical limit switches as chain full up and down stops. It also operates as an overload protection [RES. 4.2.2. - Machinery Directive]. The clutch discs are asbestos-free, and are pre-loaded through a set of Belleville washers.

Balancer:

The balancer is connected to the clutch joint, and provides for correct hoist bal- ancing. It absorbs the heat generated during clutch operation.

Suspension:

It is produced with an eye bolt suspension; are available on request, the executions with hook suspension or with eye-bolt 90° version for  longitudinal positioning of the hoist.

Lifting Limit Switches:

Available on request, limit the hook’s ascent and descent run [RES. 4.1.2.6 a) - Enclosure 1 Machinery Directive]. They are made of two  precision micro switches which function according to the principle of “slow positive opening” and work on the auxiliary circuit of the control
device of the lifting motor.

Electrical Controls

Low Ac voltage 48V - 50Hz electrical equipment, made with a PCB  (Printed Circuit Board), which includes a up/down remote contactor, double  speed remote contactor, general line contactor, transformer for the control circuit low voltage power supply, transformer protection fuse, terminal block for the auxiliary and power circuit connections, and electromagnetic brake power supply/rectifier. The components are contained in a watertight box made with shock-resistant thermoplastic material with an IP 55 protection class.

The control equipment is fastened on the motor side of the hoist. The controls are activated by the watertight ergonomic push button panel made of self-extinguishing shock-resistant thermoplastic material with an IP 65 protection class. The emergency stop function [RES. 1.2.4 - Machinery Directive Annex I] is activated by a mushroom push-button, which puts the control circuit in forward position by means of an intentional release action [RES. 1.2.4.3 - Machinery Directive Annex I]. The push-button panel is connected to the hoist by means of a multi-core electric cable equipped with built in strainer wires.

DMT Trolleys

The trolleys are used when loads are to be moved horizontally. They are identified with code DMT, and are available in the following versions:

• Type SM, hand-pushed.
• Type EM, electrically-operated.

They run on the lower flange of the beam and are adjustable for flange width. They are made of pressed steel fitted with stirrups to prevent drop or derailing [RES. 4.1.2.2 - Machinery Directive], and equipped with shock absorbing buffers. The trolleys are fitted with pressed steel machined wheels rotating on permanently lubricated ball bearings.

Geared motor with self-braking motor:

It drives the trolley geared wheels in the EM electric version [RES.4.1.2.6. c - Machinery Directive Annex I].

Limit switches:

These switches limit the horizontal travel of the electrically operated trolley on the beam [RES.4.1.2.6 a - Machinery Directive].

Towing arm:

The towing arm, which is the connecting element between the trolley and the power supply is available for all types of trolleys of the DMT series. It is adjustable in all directions and provides for power supply cable towing as needed to ensure that the cable is not torn (when supplied).

DMT trolley electric controls:

Are fitted in a IP 55 container integrated in the translation motor, which includes a remote left/right pole changing contactor and is pre-set for a translation limit switch.

Criteria Of Use and Operating Limits

It is necessary to check the parameters which characterize operating limits of the DLK electric chain hoists to be able to have a complete correspondence between the DLK electric chain hoists and the service they were designed for. The operating limits are: actual lifting capacity, state of stress and average duration of daily use.

1. Actual lifting capacity - This is determined by the heaviest load to be lifted.
2. State of stress - The state of stress is evaluated considering the actual entity of the loads to be lifted and it is attributable to one of the four spectrum's of load shown below which determine the type of service.

3. Average duration of dailyuse - TM = Hours -  For liftng operations the average duration of use is decided in the following way:

Check that the State of stress and the average duration of daily use verified are not in contrast with the data in the following table; and,  according to the capacity, choose the hoist.

Characteristics and Technical Data

For DLK chain hoists and DMT trolleys.

Key and example of the identifying characteristics of the hoists and trolleys using codes.

Types of tension rods according to min. and max dimensions of beams.

*Available on request: electric trolleys suitable to run on a bend by guide roller kit.

DLK Electric Chain Hoist - Overall Dimensions - Weights - Eye Suspension

*Weight of hoist with 3m hook run and 2m pushbutton panel cable.

**With application of raise/lower electric limit switches A and E dimensions increase by:

• DLK 1 + 45 mm
• DLK 2 + 40 mm
• DLK 3 + 45 mm
• DLK 4 + 60 mm

Chain box type (C-D-E-F-G-H-I)

NOTE: With application of raise/lower limit switches the maximum capacity of the chain box decreases by 1 m of hook run and the E1 dimension increases by 25 mm.

DLK Electric Chain Hoist with DMT Travel Trolleys Overall Dimensions - Weights

*Weight referred to 3m- hook-run hoist.

**Dimensions for 2-speed trolley in brackets.

NOTE: When the hoist is equipped with raise/lower limit switches, dimension J increases as much as dimensions A and E, page 9 and note regarding the chain box.

Maximum Reations of DMT Trolleys Wheel on Beam Flange

Electric Characteristics of Motors, Fuses and Power Cables