25X 1st Stage
£199.00 RRP £246.00 In StockPlease note: This item cannot be shipped outside the European Union - learn more
The Mares XR 25X 1st Stage is a 1st stage with single sided ports for sidemount stages with optimum hose routing. Ports on one side of the 1st stage allow you to route all of your hoses downwards for a DIR setup. Extremely reliable the balanced diaphragm design is machined from a single piece of nickle-plated marine brass with an ACT Valve for enhanced lifespan.
The port configuration also works perfectly with deco stages so all the hoses route straight down the cylinder to reduce snagging or damaging hoses whilst leaving the valves clutter free for access.
- One piece metal body
- ACT Valve
- Dry cold water kit
- Trimix, Heliox, Helitrox
- Intelligent Port Design
- Nickel and chrome plated brass
- balanced diaphragm mechanism
- flow rate at end of 210cm/7ft long low pressure hose (STp) 1200 l/min
- Static ISP (0-300bar/4350psi supply pressure) 8,8-9,4 bar
- Dynamic flow Control (DfC) Up to 9,9 bar / 144 psi
- High pressure ports 1 (7/16" UNF)
- Low pressure ports 2 (3/8" UNF)
- of which DfC ports 1
- Weight DIN: 758 g / 27 oz
Mares XR 25X 1st Stage - Features
?This feature allows the diver to adjust the inhalation setting from the set level and increase the effort required to open the 2nd stage valve to deliver air. Close.
?The venturi control affects how air flows in the 2nd stage. In it's positive position the flow of gas creates a vacuum against the diapragm, helping to open the valve. In it's negative position it will divert gas back against the diaphragm helping to close the valve. It is basically used to help prevent free flowing. Close.
|Cold Water Rated|
?Cold water has adverse effects on regulators and can cause some to freeze so each regulator combination must be tested during manufacturing for their performance in different water temperatures.
Cold water is defined by EN250 as below 10°C. If a regulator combination cannot meet the performance standards below 10°C then they are only suitable for warm waters.
EN250 / (EN250A >10°C)
To pass the regulator must provide at least 62.5 L/min of air at 50M depth above 10°C. Close.
|Cold & Warm Water|
?Environmentally sealed 1st stages offer greater protection against freezing when diving in cold water (below 10 degrees C)
Scubapro have a new method of cold water proofing their first stages called the eXtended Thermal Insulating System or XTIS which still allows water into the first stage but the internal parts that come into contact with the water are coated to prevent ice from forming. Close.
?Unbalanced regulators are affected by the pressure in the cylinder, becoming slighty harder to breathe from when the pressure starts to drop.
Balanced regulators are not affected by the cylinder pressure or depth.
Over-balanced regulators achieve unprecedented performance by increasing your air supply the deeper you go providing the best breathe for deep divers. Close.
|High Pressure Ports|
?High pressure ports supply the pressure gauge and wireless transmitters for dive computers Close.
|Low Pressure Ports|
?Low pressure ports supply the 2nd stages and inflator hoses Close.
?All regulators need to be serviced to keep them in working order as the parts inside them age and wear over time and with use. Most regulators need to be serviced once a year or after 100 dives with normal recreational use to replace parts and re-balance.
Some regulators use more modern materials or mechanisms that allow them to extend the servicing interval that can save you some money in the long run. Close.
|1 Year - 100 Dives|
|Weight in Grams (approx)|
?The weight includes the first stage (DIN fitting), hose and second stage. Close.
We offer free standard delivery on orders over £50.
Standard delivery is £3.95 for orders under £50. You will receive your order 2 - 4 days from the date of despatch. Order by 3pm on a working weekday and we will aim to despatch the same day.
Next Working Day is £6.95.
We hope you will be completely satisfied with any product purchased from Simply Scuba.
However, you can return it for any reason within 28 days from the date of despatch for a full refund (less postage costs).
Royal Mail tracked return option within the UK for your convenience.
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What To Buy DIN Or A-Clamp
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What Are Cold Water Regs
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