Do you truly understand your regulator? When faced with a wall of patented terminology, do you know what any of it actually does? This article breaks down the proprietary technologies from leading brands so you'll never stare blankly at a spec sheet again — and you'll have a much clearer idea of how to get the most out of your own regulator. (All images, text, and video content are sourced from official manufacturer websites.)
Atomic J-Seat Piston System
The core idea is to blunt the leading edge of the piston orifice and shape the retaining side of the high-pressure seat into a concave taper. This dramatically reduces the seat deformation caused by long-term use. A conventional flat high-pressure seat tends to develop an indentation over time that allows air to leak; the concave taper, by contrast, actually conforms more tightly as it wears — improving the seal rather than degrading it.
The O-ring on the piston stem is designed to be free-floating, minimising friction from relative movement.
Regulator — Second Stage Regulator
Seat Saving Dynamic Orifice — a wear-saving dynamic valve seat. When there is no pressure, the valve seat springs open so it is not in contact with the intermediate-pressure diaphragm, preventing the indentation and deformation that would otherwise result from prolonged compression.
AFC (AUTOMATIC FLOW CONTROL)
In normal conditions the AFC's baffle extends into the airflow path; air passing through the hollow centre of the baffle creates turbulence that slows the flow. As depth increases, the rising pressure inside the second stage regulator pushes the baffle outward, converting it into a flat deflector. The result is automatic, depth-dependent flow regulation — no diver intervention required.
https://www.youtube.com/watch?v=ImUzyG2SnJU
Mares
Balanced Piston
https://www.youtube.com/watch?v=CYcyGKjVO6Q
DFC (DYNAMIC FLOW CONTROL)
A small chamber is created between the intermediate-pressure cavity and the diaphragm, and this chamber communicates with the intermediate-pressure orifice. When air exits the orifice it draws air out of this small chamber with it — the reduced volume means pressure drops faster — causing the diaphragm to deflect and open the demand valve more readily. The outcome is a more sensitive response and a smaller intermediate-pressure drop on inhalation.
https://www.youtube.com/watch?v=axjyMdSSSQM
ACT VALVE
ACT (Advanced Coating Technology) — this patented technology creates a high-pressure seat engineered for optimised performance, safety, and reliability. The sealing surface is coated with hard polyurethane (PU), achieving a new level of durability. The new valve is reported to be 600% more durable than its predecessor.
Second Stage Regulator VAD (VORTEX ASSISTED DESIGN)
When the second stage regulator valve opens, air travels through the manifold toward the mouthpiece. A specially angled baffle at the manifold opening imparts a spinning motion to the airflow, generating a vortex. The resulting low-pressure zone pulls the second stage regulator diaphragm inward, assisting the lever in opening the valve.
https://www.youtube.com/watch?v=dFUye_QmShA
ALL METAL TECHNOLOGY
An all-metal second stage regulator offers superior heat exchange. The metal body conducts heat with the surrounding water, helping to prevent icing in cold-water environments. Additionally, moisture in exhaled air is captured by the metal walls and recirculated, re-humidifying each inhalation.
https://www.youtube.com/watch?v=dFUye_QmShA
MESH GRID
A fine-mesh front cover reduces the pressure that water current exerts on the diaphragm, preventing unwanted free-flow.
https://www.youtube.com/watch?v=tfT5MrOSiq0
Scubapro
https://www.youtube.com/watch?v=rHaY3wghp0c
MK25 & MK17
https://www.youtube.com/watch?v=U-aKdJ9bDYw
S620
https://www.youtube.com/watch?v=dEHQAIYbe8k
A700
https://www.youtube.com/watch?v=cnkAUuqPbls
XTIS (EXTENDED THERMAL INSULATING SYSTEM)
The Extended Thermal Insulating System completely isolates the internal mechanism from the surrounding environment, improving cold-water freeze resistance by 30% and delaying the onset of icing under extreme cold-water conditions.
https://www.youtube.com/watch?v=4nZgIwRfeWc
VIVA (VENTURI-INITIATED VACUUM ASSIST)
This vacuum-assist system uses the negative pressure generated by rapidly moving gas to pull the second stage regulator diaphragm inward, helping the lever open the demand valve. It can be switched on or off depending on conditions to prevent free-flow.
Apeks
DCE (DIVER CHANGEABLE EXHAUST)
The Diver Changeable Exhaust system ships with two exhaust covers, giving divers a choice between minimal bubble interference (ideal for underwater photography) and a more compact, comfortable fit.
https://www.youtube.com/watch?v=wRGFJtMgri4
HEAT EXCHANGER
The first stage regulator body is designed with layered fins that increase the surface area available for heat exchange between the regulator and the water.
https://www.youtube.com/watch?v=tEnU13Ioaaw
ANTI-BACTERIAL 2ND STAGE
EPA- and FDA-approved non-toxic, odourless silver-ion additives provide antimicrobial properties, guarding against the viruses, mould, yeast, algae, and bacteria that can accumulate inside a second stage regulator.
https://www.youtube.com/watch?v=N_q5LDXuCi8
Aqua Lung
ACD (Auto Closure Device) — Once the regulator is disconnected from the scuba tank / cylinder valve, the ACD automatically seals the regulator's inlet port (both yoke valve and DIN valve versions). This keeps water and contaminants out of the regulator during rinsing and storage.
https://www.youtube.com/watch?v=RAoeOGUNdJI
COMFO-BITE MOUTHPIECE
This patented mouthpiece features an ergonomic design with a smaller bite profile, eliminating jaw fatigue during long dives.
https://www.youtube.com/watch?v=ASxM-kt4Pdk
Text and video alone may not be enough for everyone to fully grasp the principles behind these designs. We'd love to organise seminars where physical samples and diagrams can help you understand them even more clearly.
