Account for every air consumer before reserving the supply.
A 12 bar portable compressor may be considered for an application whose documented pressure requirement reaches this category. Selection still depends on the complete air demand. On equipment with a pneumatic drive, air can serve both the main process and the mechanism that moves or feeds the work.
For cable-blowing enquiries, this creates a practical question: does the published compressor requirement already include the blowing machine's air motor, or must that consumption be added? A separate motor figure in a specification sheet does not answer that question automatically.
Reddy Compressors welcomes portable-air enquiries with the receiving-equipment documents and the proposed assignment. This guide focuses on reconciling the demand figures for a 12 bar proposal, so a component requirement is not mistaken for a complete installation requirement.
For the wider range of portable-air enquiries, see Portable Compressors.
Start with the machine's demand statement
Identify the cable-blowing equipment and the document that applies to its configuration. Preserve the wording attached to each flow figure: total compressor requirement, process flow and motor consumption describe potentially different scopes.
Also record the pressure and operating condition associated with each figure. A motor consumption stated at a particular feed speed is a conditional data point. It should not become a universal allowance for every operating speed or pressure.
Ask the equipment manufacturer or responsible application specialist to confirm what the overall requirement includes. If that information is absent, keep the demand total unresolved. The absence is a question to close before selection, rather than a reason to choose whichever interpretation fits the available compressor.
The installer must separately establish the suitable cable, duct and route arrangement. The enquiry should identify those details, but a compressor category cannot determine the permitted installation pressure or the expected distance.
What a published cable-blower specification shows
One cable-blower manufacturer's page lists a compressor range of 185–750 CFM dependent on duct internal diameter, alongside a pressure range extending to 12 bar. It separately lists air-motor consumption of 35 CFM at a stated cable speed of 180 feet per minute.
The page does not explicitly establish whether that motor consumption is included in the broad compressor range. Nor does the motor line state a pressure or a complete flow-reference basis. Those omissions matter when preparing an equipment match.
The lower flow figure and upper pressure figure must not be combined into an approved duty for every installation. The page provides useful evidence for an enquiry, but does not resolve a particular route's total demand.
These are reference specifications for identifiable equipment, not Reddy Compressors inventory, a universal cable-installation rule or an instruction to operate at the upper pressure limit.
A 12 bar compressor reference does not close the application question
A manufacturer’s India product table lists a portable compressor with free air delivery of 5.3 m³/min at 12 bar, also expressed in that table as 188 CFM. It is a useful pressure-specific reference point.
It does not, by itself, establish compatibility with the cable-blower range above. The application demand, its inclusions, flow-reference conditions and the delivery arrangement still need confirmation. Regional catalogue presence is also distinct from an offer for an available, identified unit.
In particular, comparing 188 CFM with a range beginning at 185 CFM leaves the decisive questions unanswered. A three-CFM numerical difference is not an approved operating reserve. It does not establish the actual demand for the chosen duct, the consumption of accessories or usable delivery at the receiving machine.
Obtain the offered compressor's configuration and supporting performance information before turning a catalogue comparison into a procurement decision.
Two interpretations of one enquiry
Consider a hypothetical, simplified enquiry that quotes 200 CFM for the receiving equipment and separately mentions 30 CFM for a pneumatic drive.
For the arithmetic below only, assume both numbers describe the same relevant operating condition and use a reconciled flow-reference basis. They are invented figures, not ratings for the reference equipment above.
Meaning confirmed by the equipment provider | Demand represented by the two entries |
|---|---|
The 200 CFM is the complete requirement, including the drive | 200 CFM |
The 200 CFM excludes a simultaneously operating 30 CFM drive | 230 CFM |
Inclusion or operating basis has not been established | Total remains unresolved |
In the second case, 200 + 30 = 230 CFM. In the first case, adding the motor again would count the same consumption twice. Omitting it in the second case would leave a real consumer outside the calculation.
Neither interpretation is a complete compressor selection. These totals do not contain an approved reserve, treatment allowance or assessment of site conditions. The example demonstrates how the definition of a number can change the enquiry before any machine is chosen.
Build a short air-demand reconciliation record
A useful record names each relevant consumer and says whether it is included in an established total. It also identifies who supplied that information.
Entry | Detail to retain |
|---|---|
Overall equipment requirement | Document, revision and scope of the quoted total |
Main process | Whether its flow is separate or already included |
Pneumatic drive | Applicable consumption conditions and inclusion status |
Other simultaneous consumers | Identity, operating pattern and supporting requirement |
Treatment package | Any documented air consumption relevant to the arrangement |
Common comparison basis | Pressure, flow-reference conditions and delivery boundary |
Open questions | Specific clarification required and responsible party |
An accessory should not receive an invented consumption allowance merely because it sits in the air path. Establish whether it consumes air, affects delivery pressure or introduces another relevant requirement, using its own documentation.
Keep pressure losses and air consumption distinguishable in the record. They are different quantities and cannot be added into one undifferentiated “loss” number. The technical assessment must address each on its appropriate basis.
Check which consumers operate together
Ask the installer to describe the operating sequence, including the condition for which the compressor must provide the complete supply. Do not assume that every listed consumer runs continuously, or that separate consumers can never overlap.
For an air-driven cable blower, the process and drive requirements deserve explicit reconciliation under the intended duty. The relevant specialist should confirm whether published figures already represent simultaneous operation and whether other users share the supply.
If the proposed work method changes, revisit the demand record. Adding another air user or changing the receiving machine can invalidate an earlier total even when the compressor remains labelled 12 bar.
A schedule can help explain the intended workload, but it is not evidence that an unapproved operating arrangement is permissible. Agree the method with the parties responsible for the equipment and installation.
Include the air-conditioning equipment in the enquiry
Identify the required air condition at the receiving machine and the proposed accessories. Avoid using “cooler included” as a substitute for identifying the actual unit and its documented suitability.
Check the accessory's applicable pressure and flow ratings, operating conditions and effect on the package. Its presence does not establish the performance of the whole installation. A cooler described for cable work is not automatically suitable for every 12 bar proposal.
Ask who supplies, checks and maintains each item. If the compressor provider and cable-installation contractor divide the package between them, retain one agreed equipment list so a necessary item does not fall between their scopes.
Make the unresolved question visible in the offer
A proposal can be precise without pretending every input is settled. For example, it can identify that the selected equipment remains subject to confirmation of total demand including the pneumatic drive.
The next action should then be specific: obtain the manufacturer's clarification, establish the relevant operating condition or reconcile the flow definitions. “Subject to site conditions” alone does not tell the customer which question prevents a supported equipment match.
Once the question is resolved, retain the answer with the equipment schedule. It should remain available if another compressor is offered or the work moves to a different section. This preserves the basis of the decision without relying on a verbal recollection of the enquiry.
Frequently asked questions
Is 12 bar required for all cable blowing?
No universal requirement is established here. Use the documented limits and assessed requirements of the actual cable, duct, blowing machine and installation method. A published range endpoint is not a recommended setting for every job.
Should pneumatic-motor consumption always be added?
Only after confirming it is additional to the quoted total and relevant to the assessed simultaneous duty. A separately printed component figure may already be included in an overall requirement. Resolve the inclusion before calculating.
Can a compressor close to the bottom of a published flow range be accepted?
The range minimum alone cannot approve it. Establish the demand for the actual configuration, then assess the offered supply on a compatible basis. Numerical proximity does not close those questions.
Does this page approve a compressor and cable-blower pairing?
No specific pairing is established. The reference data expose questions that the equipment providers and competent technical reviewer must resolve for the assignment.
What documents should accompany the enquiry?
Send the receiving-machine specification, cable and duct details, intended work sequence and any existing compressor or accessory schedule. Identify which figures describe total demand and which describe individual consumers. Include the location and planned working dates.
Discuss a 12 bar portable-air requirement
Reddy Compressors has served compressor enquiries since 2002 from its Secunderabad/Hyderabad base. Telangana and Andhra Pradesh are priority areas. Support for projects elsewhere in India depends on the assignment and confirmed supply arrangements.
Bring the complete demand question to the enquiry, including any uncertainty about pneumatic-drive consumption. Equipment and commercial scope can then be considered against a defined requirement.
Emergency coordination is subject to the available arrangements and site circumstances, without a guaranteed response time. High-pressure supply remains subject to supplier confirmation.