Electric Detonators
EPC-UK supply standard electric detonators manufactured by Davey Bickford in France.
The Daveydet Short Delay range consists of 21 delay numbers with a time interval of 25ms between successive numbers in the range to give better breakage and controlled vibration.The Daveydet Half-Second range consists of 13 delay numbers with a time interval of 0.5 seconds between successive numbers in the range.
Daveydet Medium Intensity detonators are suitable for general blasting operations. For situations where a higher degree of protection from electrical sources such as radios, mobile phones etc. is required, the Daveydet High Intensity detonators are more suitable. The High Intensity detonator requires the use of a high output exploder.
Common features for standard electric detonators
The detonator shell is made of Aluminium. The base of the detonator tube is stamped with a letter Y to identify the manufacturer. The delay period number is printed on the side of the detonator. Instantaneous detonators have no markings on the base of the aluminium tube. The initiating power of these detonators is equivalent to no. 10 strength as a result of the compression of the 0.8g base charge. Triple crimping of the detonator shell ensures excellent water resistant characteristics:
2 days at 25 bars
8 days at 10 bars
28 days at 5 bars.
The twinned copper wires can support a tensile strength of 10daN without internal disturbance of the fusehead assembly. The resistance per unit length of twinned wires is 0.14W/m for 0.56mm diameter copper wire and 0.095W/m for 0.7mm diameter copper wire.
The lead wires of the detonator are copper and have colour-coded insulation.
The wire coating is formed from PVC, which offers a good resistance to abrasion.
The wire coating is formed from PVC, which offers a good resistance to abrasion.
Delayed action Daveydet detonators are available in the following delay numbers:
- Short Delay series 1 to 20 inclusive - delay interval 25 milliseconds
- Half Second series 1 to 10 inclusive - delay interval 500 milliseconds.
The detonators have a plastic tag on one of the wires that indicates the delay number of the detonator.
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The fuseheads in Daveydet detonators have the following electrical characteristics:
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Behaviour to static electric discharge between:
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Each fusehead is protected by an insulating anti-static sleeve.
EPC-UK also supply the Daveydet P instantaneous and short delay range of detonators. These are approved for use in coal and other safety lamp mines. The half second permitted range of detonators is approved for use in certain circumstances underground in coal and other safety lamp mines. The electrical characteristics of these detonators are different to Medium Intensity Detonators.
For Seismic prospecting EPC-UK supply the Daveydet SR range of detonators. These detonators have unique electrical characteristics and cannot be fired in the same circuit as other detonators.
Classification and Labelling
Electric detonators with lead wire lengths between 2m and 12m are presented as twinned folded wires.
These detonators are classified 1.1B. The UN No. for transportation is 0030.
Upon request detonators can also be packaged as 1.4B and the UN No. for transportation is 0459.
Plain Detonators
Herica plain detonators for use with safety fuse can be supplied by EPC-UK
For further details on these products please contact the Technical Services department of EPC-UK
Click here to enlarge
The fuseheads in Daveydet detonators have the following electrical characteristics:
Click here to enlarge
Behaviour to static electric discharge between:
Click here to enlarge
Each fusehead is protected by an insulating anti-static sleeve.
EPC-UK also supply the Daveydet P instantaneous and short delay range of detonators. These are approved for use in coal and other safety lamp mines. The half second permitted range of detonators is approved for use in certain circumstances underground in coal and other safety lamp mines. The electrical characteristics of these detonators are different to Medium Intensity Detonators.
For Seismic prospecting EPC-UK supply the Daveydet SR range of detonators. These detonators have unique electrical characteristics and cannot be fired in the same circuit as other detonators.
Classification and Labelling
Electric detonators with lead wire lengths between 2m and 12m are presented as twinned folded wires.
These detonators are classified 1.1B. The UN No. for transportation is 0030.
Upon request detonators can also be packaged as 1.4B and the UN No. for transportation is 0459.
Plain Detonators
Herica plain detonators for use with safety fuse can be supplied by EPC-UK
For further details on these products please contact the Technical Services department of EPC-UK
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