What site media can and cannot prove
A photograph of a diesel portable compressor connected to a blasting pot is genuine evidence that the machine was there and set up that way. It is not evidence that the job was completed on time, that the air was dry enough for coating, or that the compressor delivered its rated flow. Video adds sequence and sound, which can show a compressor loading, a drain discharging or a leak hissing, but still only for the moments recorded.
We use project media carefully because it is persuasive. A good picture invites the reader to believe more than it shows, so the caption and the supporting records matter as much as the image.
| Media can usually show | Media cannot show on its own |
|---|---|
| Which machines and accessories were on site | That a machine delivered its rated FAD or pressure |
| Installation layout, hoses, receivers, dryers, cabling | That the installation meets a standard or code |
| A visible condition: corrosion, oil carry-over, a damaged hose | The root cause of that condition |
| An instrument reading at the moment of capture | That the instrument was accurate or calibrated |
| Work in progress: dismantling, part replacement, commissioning | That the work was done to specification or lasted |
| Before-and-after appearance of a component | Energy savings, uptime or customer satisfaction |
A simple evidence ladder for images
We grade each image or clip by how much it can support. The grade decides how it may be captioned and used.
- Illustration: a general picture of a type of equipment with no project link. It may explain a concept but makes no project claim.
- Equipment identified: the make, type or nameplate is visible, but the site and date are not confirmed.
- Project confirmed: who took it, when and on which job is known and checked against job records.
- Condition or action shown: a specific, observable state or step is clearly visible, such as a worn separator element or a new hose fitted.
- Corroborated: the image is supported by dated work orders, test sheets or logged readings that confirm what it shows.
- Outcome established: a wider result, such as reduced leak flow, is proven by a separate measurement programme; the image only illustrates it.
A photograph at the third level should never be captioned as if it were at the sixth. “Compressor package installed at a fabrication shop” is fine; “compressor that cut energy use at a fabrication shop” is not, unless measured evidence supports it separately.
Permissions, privacy and redaction
Industrial sites are private property, and many plants restrict photography. Before any image is used publicly we confirm that the person who took it agrees, that the site owner permits it and that the customer accepts association with the work. Identifiable people need their own consent.
Before publication we remove or blur anything that could expose the client or their staff:
- Company names, logos and signboards, unless the client has agreed to be named.
- Faces, ID badges and vehicle number plates.
- Control-panel passwords, network details and screen contents beyond the reading in question.
- Site layouts, security features and process details the client considers sensitive.
Permission to photograph for internal service records is not the same as permission for marketing. We treat them as separate decisions.
Reading technical details correctly
Even an honest image can be misread. These are the points we check before using a technical photograph:
Gauges and displays
A gauge photograph shows a reading at one moment and from one angle. Parallax, a sticking needle, the wrong scale (bar against psi, gauge against absolute) or an uncalibrated instrument can all mislead. A controller screen may show a setpoint rather than an actual value. Where a reading supports a claim, the instrument’s identity and calibration status should be recorded alongside it. As a reminder, 1 bar is 14.5 psi, so 7 bar is 101.5 psig.
Oil, water and contamination
A wet drain or oily filter element shows that something is present, not how much or why. Oil in the air could come from a failed separator, overfilling, high discharge temperature or carry-over from an upstream source. Air quality claims need sampling and measurement to ISO 8573 methods; a picture is supporting detail only.
Wear and damage
Close-ups of worn rotors, scored cylinders or burnt contacts are valuable, but the cause of wear usually needs inspection records, oil analysis or operating history. Captions should describe what is visible, not assert the cause.
Before and after
Before-and-after pairs should be taken from a similar position, in similar light, of the same component, with dates. A clean new component beside a dirty old one shows a replacement, not an improvement in system performance.
Writing honest captions
A caption should state a single observable fact and stop there. We follow a simple pattern: what is shown, where (by industry and region if anonymised), when, and what supporting record exists.
- Acceptable: “Diesel portable compressor with aftercooler and moisture separator set up for blasting at a coating job in Andhra Pradesh.”
- Acceptable: “Separator element removed during a scheduled service; the replacement was recorded on the service sheet.”
- Not acceptable without evidence: “Our compressor eliminated moisture problems”, “Zero downtime throughout”, or any number not supported by measurement.
Stock or generic images should be clearly separate from project images and never captioned as a specific job.
Video: extra value, extra care
Video can show a compressor starting, loading and unloading, a drain cycling, a leak located with an ultrasonic detector or a commissioning step. It also captures more than intended: background conversations, other companies’ equipment, screens and people. We review clips frame by frame before use, keep the original, and avoid edits that change the apparent sequence or duration of events.
How we use media from our own projects
Our projects include temporary air for a natural-gas development at Kakinada, diesel portable compressors on round-the-clock hire at a steel plant in Andhra Pradesh, and compressors on hire for power-plant and infrastructure work in Karnataka and Andhra Pradesh. Where we publish photographs from such work, we describe the job by sector and region, show only what the image supports, and do not name the client unless they have agreed in writing. Performance or outcome statements, where we make them, come from records, not from pictures.
How Reddy Compressors helps
Since 2002 we have sold, rented and serviced compressors of ELGi, Atlas Copco, Ingersoll Rand, KAESER, Chicago Pneumatic and other makes as an independent multi-brand specialist, from our office at Tarnaka, Secunderabad. Our service teams cover Telangana and Andhra Pradesh, and we supply equipment, rentals and spares across India.
Photographs are also part of how we help customers day to day. A clear nameplate photograph lets us identify a machine and its parts and confirm fit before quoting. Photos of a fault, a gauge reading or an installation help our engineers prepare before a visit.
What to send us
- A clear, straight-on photograph of each compressor nameplate.
- Photos of the installation: compressor, receiver, dryer, filters and main pipework.
- Close-ups of the fault or part concerned, with the date taken.
- Controller screen showing alarms, running hours and pressure.
- A short video if the problem is a noise, vibration or cycling behaviour.
- Your preference on whether any image may ever be used publicly.
Frequently asked questions
Can a photo prove that a compressor was repaired properly?
A photo can show that a repair step took place, such as a new element fitted or a hose replaced, and when it is linked to a dated work order it becomes good supporting evidence. It cannot show that the work met specification or that the machine now performs correctly. That needs test readings, a commissioning check or a follow-up inspection recorded separately.
What photos should I send to identify compressor spare parts?
Send a clear photograph of the nameplate showing make, model and serial number, then the part in place and, if removed, the old part beside a ruler or with any part number visible. Add a wider shot of the area so the engineer can see connections and orientation. From these we identify the part and confirm fit before quoting.
Are gauge photos reliable evidence of compressor pressure?
They show what a gauge read at one moment, which is useful, but they are only as reliable as the gauge and the angle of the photo. Check the scale, whether it reads gauge or absolute pressure, and whether the instrument is calibrated. For a performance claim, logged readings from a known, calibrated instrument are much stronger than a single picture.
Can I use project photos without the client’s permission?
For public use, you should not. Industrial sites are private, many plants restrict photography, and identifiable people and company names need consent. Internal service photos are a different matter, but permission for internal records does not extend to marketing. We publish project images only when the client has agreed, and we anonymise or redact sensitive details first.
How do you anonymise compressor project photos?
We remove or blur company names, logos, signboards, faces, ID badges, vehicle number plates, screen contents unrelated to the point being shown, and any site layout or process detail the client considers sensitive. The caption then describes the job by industry and region rather than by name. We keep the unedited original privately with a record of the edits made.
Does a video of a compressor running prove its capacity?
No. A video can show the machine starting, loading and running, and sometimes the pressure on its display, but it cannot show free air delivery, specific power or how the machine performs over time. Capacity needs a flow measurement or a recognised test. The video is useful supporting detail when paired with those records.
Related pages
Technical content reviewed by D. Srinivas Reddy, Managing Partner and service engineer, Reddy Compressors. Last updated 17 October 2026. How our engineering content is reviewed.