Yeah, now the new www.hotdive.cn site appears to be working OK without security warnings from the security software.
Info Technical Discussion | HOTDIVE Diving Equipment Development
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Yeah, now the new www.hotdive.cn site appears to be working OK without security warnings from the security software.
OP
HotDive(Hide In Ocean)
Contributor
Today I'd like to share some insights about the Hotdive S2 EVO balanced piston first stage. As a mid-range regulator, it features several noteworthy design and functional details.
The S2 EVO utilises a balanced piston design with a main body constructed from SUS 316 stainless steel. The internal configuration varies by connection type: the Yoke version incorporates a stainless steel disc filter, while the DIN version employs a conical sintered bronze filter.
Maintenance convenience has been considered in this first stage's design. The high-pressure seat made from PFA material offers good durability, and routine maintenance typically requires only ultrasonic cleaning. The swivel turret design facilitates hose management and helps prevent tangling.
Regarding specifications, the S2 EVO is available in both YOKE and DIN connection options. The Yoke version weighs 595g, while the DIN version weighs 522g. It features 5 low-pressure ports and 2 high-pressure ports, with intermediate pressure output stabilised at 130-145 PSI (9-10 Bar). The air supply supports 232 Bar (3364 PSI) for Yoke and 300 Bar (4351 PSI) for DIN configurations. The product is CE certified.
It should be noted that the S2 EVO is designed for conventional water temperature environments and is not suitable for ice diving conditions. The standard version supports compressed air only; for nitrox applications, a specially treated O2 version must be selected.
In terms of user experience, the weight and dimensions of this first stage make it suitable for travel use. The stainless steel construction provides good durability, making it well-suited for recreational diving environments where it demonstrates solid performance.
Overall, the S2 EVO represents a mid-range regulator that achieves a good balance between performance and maintenance convenience, making it appropriate for most recreational diving scenarios.
The S2 EVO utilises a balanced piston design with a main body constructed from SUS 316 stainless steel. The internal configuration varies by connection type: the Yoke version incorporates a stainless steel disc filter, while the DIN version employs a conical sintered bronze filter.
Maintenance convenience has been considered in this first stage's design. The high-pressure seat made from PFA material offers good durability, and routine maintenance typically requires only ultrasonic cleaning. The swivel turret design facilitates hose management and helps prevent tangling.
Regarding specifications, the S2 EVO is available in both YOKE and DIN connection options. The Yoke version weighs 595g, while the DIN version weighs 522g. It features 5 low-pressure ports and 2 high-pressure ports, with intermediate pressure output stabilised at 130-145 PSI (9-10 Bar). The air supply supports 232 Bar (3364 PSI) for Yoke and 300 Bar (4351 PSI) for DIN configurations. The product is CE certified.
It should be noted that the S2 EVO is designed for conventional water temperature environments and is not suitable for ice diving conditions. The standard version supports compressed air only; for nitrox applications, a specially treated O2 version must be selected.
In terms of user experience, the weight and dimensions of this first stage make it suitable for travel use. The stainless steel construction provides good durability, making it well-suited for recreational diving environments where it demonstrates solid performance.
Overall, the S2 EVO represents a mid-range regulator that achieves a good balance between performance and maintenance convenience, making it appropriate for most recreational diving scenarios.
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One aspect I don't fully understand with Christo lube MCG 111 for scuba use as your example above in the 0.4536 Kg (1 Lb) tub is how it is so cheap to buy from China compared with the USA manufacturer and the various scuba distributors in both USA and Europe.
Granted the American supplier ECL ships with a certificate of conformity and a batch test number and many China suppliers such as the one illustrated below don't. But they say Christo-Lube MCG 111 on the label and state it in the description original import so it must be right.
上海超润原装进口
润滑脂，价格优惠!!!更多产品详情欢迎致电
(Google Translate) Shanghai Chaorun original import grease at a favourable price!! For more product details please call us
You’re talking about almost half a kilo of cristolube, that can power an ocean of divers..View attachment 916196
One aspect I don't fully understand with Christo lube MCG 111 for scuba use as your example above in the 0.4536 Kg (1 Lb) tub is how it is so cheap to buy from China compared with the USA manufacturer and the various scuba distributors in both USA and Europe.
Granted the American supplier ECL ships with a certificate of conformity and a batch test number and many China suppliers such as the one illustrated below don't. But they say Christo-Lube MCG 111 on the label and state it in the description original import so it must be right.
上海超润原装进口
润滑脂，价格优惠!!!更多产品详情欢迎致电
(Google Translate) Shanghai Chaorun original import grease at a favourable price!! For more product details please call us
How cheap is cheap..?
There has been some speculation already about the S2 (on the scubagaskets thread) of the ambient chamber rubber boot in the middle of the reg might be available in a sealed format at some point for users who like to dive with sealed pistons, for example in cold water
Any plans on the Hotdive side to do that? It should be rather simple modification to the already existing white/black boots that have the small pin hole
davecampbell
Contributor
source for this ultracheap "christolube"? The price for this stuff (christo, tribo,etc...) in small quantities is really getting out of hand.
Is there a difference between that implies the EVO part?
I see your pictures have a polish mirror-y finish, unlike the S2 brushed matte finish
So, I just received the long awaited S2 (my interest started when the S2T2 version from scubagaskets was pre-announced in April/May last year), and plan to dissect it bit by bit in the next few (days/week/months, procrastination permitting
)It’s mind blowing how small it is, I initially thought as a mk10 style piston it would be around the same size (or slightly longer from the pictures — I was assuming something closer in size to the mk25)
But it was thinner than I suspected and the mk10, and thus also shorter
The ambient chamber boot is way stiffer than I expected (and thus incompatible with a spec/sealing boot concept if plugged)
Would be great if that concept is implemented
I guess my main question for now is if there’s any differences between the S2 and the Evo Version beyond the finish
Also I wonder if (/suggest) the HP seat retainer would have a screw option to modify the IP via spring bias (like the mk25) in development at some point in the future; that would be a very neat feature/upgrade. The structure seems to allow for that
Also thanks a lot @Chris Ruan for the name customization
Updates to follow as they come
OP
HotDive(Hide In Ocean)
Contributor
Thank you for providing additional review information and sharing it with everyone.
The 2 version are the same product, differing only in the surface finish. The mirror version is prone to scratches, we got a lot of customers feedback(which affects its appearance), so we have upgraded it.
pisauron
Contributor
Is there a difference between that implies the EVO part?
I see your pictures have a polish mirror-y finish, unlike the S2 brushed matte finish
So, I just received the long awaited S2 (my interest started when the S2T2 version from scubagaskets was pre-announced in April/May last year), and plan to dissect it bit by bit in the next few (days/week/months, procrastination permitting
It’s mind blowing how small it is, I initially thought as a mk10 style piston it would be around the same size (or slightly longer from the pictures — I was assuming something closer in size to the mk25)
But it was thinner than I suspected and the mk10, and thus also shorter
View attachment 916666
View attachment 916668
The ambient chamber boot is way stiffer than I expected (and thus incompatible with a spec/sealing boot concept if plugged)
Would be great if that concept is implemented
I guess my main question for now is if there’s any differences between the S2 and the Evo Version beyond the finish
Also I wonder if (/suggest) the HP seat retainer would have a screw option to modify the IP via spring bias (like the mk25) in development at some point in the future; that would be a very neat feature/upgrade. The structure seems to allow for thatView attachment 916669
Also thanks a lot @Chris Ruan for the name customizationView attachment 916670
Updates to follow as they come
Waiting for updates from what's inside as well. I too ordered an S2 this week.
A question about the HP seat and the piston knife edge (I’ll look at them under the microscope but not in a rush to do that; but you might provide better clarity) — you mentioned cleaning the seat; does that mean that the seat is reusable?
Is the piston knife edge sharp or rounded (blunt/rounded)
This was actually the first question I had when I heard about this reg last year
If the HP seat is reusable I would be tempted to open it sooner than later as I wouldn’t waste the only service kit that I have
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