Apeks MTX-RC Stage-3 Automatenset bij sublub
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Apeks MTX-RC Stage-3 Automatenset

DIN YOKE
€ 999,00 € 825,62 Excl. VAT
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  • Product description and specifications
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Product description Apeks MTX-RC Stage-3 Automatenset

The Apeks MTX-RC Stage 3 Regulator Set packages the primary MTX-RC with the matching Octopus for an attractive little saving compared to purchasing separately.
The MTX-RC is a modified version of the the original MTX-R that was designed to meet the requirements of the United States Navy Experimental Dive Unit extreme cold water test. In order to achieve this tough test the MTX-R is factory tuned with no diver adjustment. Apeks created the MTX-RC to give divers the option of fine tuning their regulator performance to suit their diving.
The MTX-RC first stage is engineered for the extreme cold with heat exchanging fins on nearly every surface. The over balanced diaphragm design is environmentally sealed to both help protect the internal components from ice crystal formation and also prevent damage from contamination. There are two pre-angled high pressure ports, four low pressure ports on the side of a swivelling turret and a high flow port of the end beneath a protective cap.
The second stage now features an oversized breathing effort adjuster on the side of the housing that will increase the amount of effort required to open the pneumatically balanced valve. Above that there is a venturi lever to alter the flow of air within the second stage, either directing it from the valve towards the mouthpiece or diverting it back towards the diaphragm to help close the valve. The second stage also features a large heat exchanger on the hose inlet to help increase the temperature as it passes into the second stage.

First Stage:
  • Satin plated brass body with heat exchanging ribs for maximum thermal performance.
  • Break through, innovative over-moulded first-stage endcap and environmental diaphragm helps prevent ice build-up that can cause first stage free flow in extreme circumstances. Also protects the first stage from impact damage.
  • Ribbed diaphragm clamp for improved heat exchange in cold water conditions.
  • Unique over-balanced diaphragm design – as the diver descends, the over-balancing feature allows the medium pressure gas in the hose to increase at a faster rate than ambient. This results in superior performance at depth.
  • 5 x medium pressure ports, 4 mounted on a rotating turret for improved hose orientation
  • 2 x angled high pressure ports for optimal hose routing and fitting of transmitters.
  • Double swivel hose for greater freedom of movement and comfort.
  • Easy to grip DIN hand-wheel or over-moulded yoke hand-wheel, only requires one hand to release.
  • DIN, Yoke and M26 Thread available, 300bar, 232bar and M26 300bar (O2) respectively.
  • Tested for Octopus use - EN250A to 60 metres cold water.
  • Nitrox/Oxygen compatible – Up to 40% O2 outside the EU (European Union), within the EU anything above 21% O2 must use an M26 Connection.


2nd Stage:
  • Protective bumpers to protect the second stage from impacts and scratches in the most vulnerable places.
  • Ergonomic and simple to use venturi lever.
  • Oversized breathing effort adjuster makes adjustment easy in cold water whilst wearing gloves.
  • Large purge button.
  • Reversible second stage for either a left or right hand gas supply configuration.
  • A heat exchanger (patented) dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water for a more comfortable breathe.
  • Features an innovative Diver Changeable Exhaust system (DCE). The system gives the diver the ability to change from a small exhaust tee to a large exhaust tee. The regulator is supplied with both sets of exhaust tees.
  • Comfo-bite mouthpiece
  • Flexible nylon braided hose, which has better cold water performance than traditional rubber hose.
  • Designed and manufactured in the UK.
  • No single-use plastic in the packaging

Specifications for Apeks MTX-RC Stage-3 Automatenset

BrandApeks
CategorySets with octopus
Product code726023-ma-Apeks-Mtx-Rc Din + Octopus
UnitSet
Sublub's choice

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Sublub's choiceYes
CE cert for cold water

Regsets with a CE cold water certificate have been tested in waters below 10 degrees. When diving in NL/BE this comes in handy. In summer, the water on the surface may be warmer than 10 degrees, however, when decending to greater depths, you’ll hit various thermoclines in which the water temperature may be less than 10 degrees.

CE cert for cold waterYes
1st stage connection

The INT ( yoke) connection uses a clamp type to mount the regulator over the cylinder valve and is tightened into place by screwing the cap. This pushes the first stage into the sealing o-ring of the cylinder valve. With the DIN fitting the male part is screwed into the valve to securely capture the o-ring. We recommend the DIN connection, since this is a safer connection. This connection is mostly used for 300bar cylinders. However, the DIN300 bar connection also works with a 200bar tank valve

1st stage connectionYOKE
DIN300 bar
1st stage HP port

A second high pressure port on a 1st stage is necesarry if you are contemplating to dive with a computer that is air integrated. The transmitter will be attached to the second high pressure port so that you will always have backup analogue SPG.

1st stage HP port2 HP ports
1st stage LP port5 lp-ports
Hose type

Flex hoses are, as the word already describes it, more flexible than rubber hoses. By using these types of hoses the chance of your 2nd stage fitting more comfortable in your mouth, is doubled. The flex hoses are also easier to roll up for transportation and a little lighter than rubber hoses.

Hose typeFlex
Nitrox

In Europe, it is mandatory to have a special M26 regset and cylinder when diving with Nitrox. The regsets that are shown here, do not have this special M26 thread. However, these are all technically fit to dive with Nitrox up to 40%. Outside of Europe, you can use these regs to dive with Nitrox up to 40%.

NitroxTechnically suitable upto 40%
1st stage ACD

Several regset manufactured by Aqualung have the ACD system. This system makes sure that water will not get in to the 1st stage after diving or even if you have forgotten to put on your dust cap when you rinse your materials.

1st stage ACDNo ACD
1st stage air supply

When you dive with an unbalanced 1st stage, breathing may become a little harder as your cylinder is being depleted of air. A balanced 1st stage will give you an even resistance during your dive, as long as your cylinder contains more than 20 Bar. An overbalanced 1st stage will give you a little more pressure when at depth, which will make breathing at greater depth easier. You will be able to feel the difference from a depth of 20 to 25 meters.

1st stage air supplyOverbalanced
1st stage type

A piston 1st stage is easier to service, since there are less parts. However, a piston 1st stage needs to be serviced earlier than other 1st stages, since the water does get inside the 1st stage. A membrane 1st stage may be less maintanace- sensitive, however, you’ll have to be more precise in adjusting it. If you would like to dive in cold(er) waters, we would recommend a 1st stage with a membrane.

1st stage typeMembrane
2nd stage venturi regulator

A venturi switch is a + and – switch on the 2nd stages that regulates airflow. When the switch is switched to the -, the 2nd stage will not free flow when entering the water. When it is switched to the +, breathing is easiest.

2nd stage venturi regulatorYes
2nd stage breathing resistance

With an adjustable breathing resistance switch on the 2nd stage you will be able to adjust the flow of air when inhaling. You may experience a free flow with your 2nd stage when doing a drift dive or if there is a strong current. If you would adjust the switch to a higher resistance, then your 2nd stage will not free flow.

2nd stage breathing resistanceAdjustable
2nd stage air supply

A balanced 2ns stage will make inhaling easier than an unbalanced 2nd stage. If you were to use an overbalanced 1st stage then you’ll always have to use a balanced 2nd stage.

2nd stage air supplyBalanced
EN250A

Regulator sets with an EN250A marking have been tested by breathing simultaniously through the primary 2nd stage and the octopus. This will increase the pressure that is put on the 1st stage and these regsets have passed that specific test. These sets can be used with an octopus up to a depth of 30 meters. Below 30 meters a separate air system with an extra 1st stage is advised.

EN250AYes

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10 Vlotte bestelling + levering. Heel klantvriendelijk!
Anke, Beringen 1-10-2026
10 Fijne Duikwinkel!!!!!
Mark, Wijnandsrade 30-9-2026
10 snel correct degelijk
Vital, Heusden-zolder 28-9-2026
10 Gewoon top sevice
Dirk, Schoten 28-9-2026
7 Meedenken bij een nieuwe uitrusting deze samen goed te installeren.
Dre, Tilburg 24-9-2026
10 Goede verzending en gemakkelijk omruilen of retourneren.
Anita, Stevensweert 23-9-2026
10 Liberpee is bij Sublub in de aanbieding. Deze bij hem besteld en razendsnel thuis ontvangen.
M., Eindhoven 20-9-2026
10 Die Informationen und Fragen rund um den Einkauf wurden schnell und kompetent beantwortet Infos auch über WhatsApp. Lieferung schneller als gedacht und nach meinen Recherchen...
Sven, Peters 20-9-2026
10 Ondanks een kleine vertraging in de levering werd ik keurig op de hoogte gehouden door de klantenservice. Producten (Suunto strap en batterij) zijn in goede orde ontvangen....
Bart, Zegge 20-9-2026
10 Helemaal oke
Didier, Kapelle op den bos 19-9-2026

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