DTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes downwards in surface-drilling applications, its name originated from the fact that the percussion mechanism followed the bit down into the hole. Applications were later found for the DTH method. .
A down-the-hole drill, usually called DTH by most professionals, is basically a screwed on the bottom of a . The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a. .
A is first thought to have been used for rock drilling in 1844. Many quarries used hand held tools that required the driller to suspend himself from a rope over the. .
In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the fluid (air, water or drilling mud) used to. .
DTH products can be used in the following applications:• Mining- drill and blast holes in open pit mining, where the drill operator will drill several holes, then. Down the Hole Hammer (DTH) is a versatile horizontal drilling method, capable of tunneling through the toughest soil types and rock formations. DTH can break through cobbles, boulders, and even solid rock — which allows our team to complete installations in otherwise impenetrable ground conditions.
[pdf] 
A SILVER air compressor is a silent encapsulated rotary screw compressor designed for performance and reliability. The FIAC silver air compressor model comes equipped with a TEFC high-efficiency electric motor, WYE Delta Starter, Sound attenuating enclosure, FIAC easy control microprocessor. .
FIACquiet rotary screw air compressorsare available in a wide variety of models, which range from 3-50 HP. The FIAC Silver air compressors are easy to. .
There are many benefits to choosing a base mounted quiet screw rotary compressor. The screw unit has low running speeds and high efficiency, and this results. .
Werther provides the SILVER air compressors to small producers, big industry, and all sizes in between. Each industry has very different needs and applications for these products. Some of the common industries we serve include: 1. Laboratory 2. Medical 3. Electronic 4. Food & Beverage 5. Dental Latest generation compressor screw technology with fully integrated aluminum block and direct drive transmission, maximum pressure up to 10 bar, compact and portable for easy mobility, low noise and vibration for close point of use (POU) and minimum piping, plug-and-play operation with no expertise required and high efficient direct transmission contributes to high reliability and easy maintenance.
[pdf] 
1-1 Scope of Application This document covers procedures and methods of tests, examinations and inspections to be performed to the Screw Compressor which has been manufactured and supplied by screw compressor vendors. 1-2 Purpose of Examination and lnspection The purpose of the examinations. .
2-1Genaeral General descriptionon examinations/inspections to be performed on the compressor proper and the relatedparts are mentioned in this chapter. The inspection itemsof each major part are shown in inspection and test plan. 2-2Material Inspection. .
After completion of the test, the rotors and the rotor chamber will be visually inspected through the discharge nozzle. (The discharge side is under most severe conditions, and the visual inspection of the discharge side is a normal practice to check a rotor. .
Following Items are measured in Heat Run, Mechanical Run and Performance Test: 1. Atmospheric Pressure 2. Atmospheric Temperature 3. Relative Humidity (Only in Performance Test) 4. Inlet Pressure 5. Inlet Temperature 6. Discharge Pressure. .
Following componenets are used for test from Shop Facilities: 1. Driver( Motor) 2. Couplings 3. Baseplate 4. Suction Filter 5. Suction Silencer 6. Discharge Silencer 7. Lube Seal Oail Unit (Include Oil Reservoir) 8. Piping 9. Instruments 10. Thrust Bearing T em perature.
[pdf]