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GENERATION II
1978-1986
The TV Series Generation
or Crossing the Desert

In October 1977, LA SPIROTECHNIQUE completed its installation in Carros, near Nice.

The company then went through a critical period, nearly filing for bankruptcy. A long period of inactivity ensued, lasting until 1986.

During these years of uncertainty, LA SPIROTECHNIQUE sought to reinvent itself, releasing new models almost every year, available in different versions (called SERIES) in order to conquer international markets. These versions included DIN versions, with international (I) seats, and French (F) seats.

To better understand this period, we can divide it into four main phases:

• The first generation of the SERIES (1978)

• The second generation of the SERIES (1980)

• The third generation of the SERIES (1983)

• The XL generation (1983), marking a kind of renaissance

One thing is certain: during this period, many divers felt lost in the face of this profusion of models. Many then turned to LA SPIROTECHNIQUE's main rival at the time, SCUBAPRO, and its famous MK2 180 or MK10 190/G250 regulators.

1978 SERIES GENERATION

In 1978, a first generation of SERIES regulators, dubbed the "first wave," appeared on the market.

It replaced the AQUILON, SPIRO 8, ALIZÉ S, and SPIROLUNG, all of which were discontinued.

SPIROTECHNIQUE then focused on particularly robust regulators, but the design of the first stages failed to win over the public. Cylindrical in shape, massive, and heavy, these models were deemed unattractive.

As a result, they quickly disappeared from the catalog: the SERIES 20 was discontinued in 1980, while the SERIES 25, 40, and 50 were redesigned to better meet divers' needs.

SÉRIE 20
1978-1979
Série 20

The 20 regulator is the first model in the SERIES. It comes in two versions: the 20/10 SERIES and the 20/20 SERIES, which differ only in the diameter of the HP air inlet seat on the first stage. The 20/10 version uses an 18.5 mm seat, compliant with the French standard, while the 20/20 version uses a 17.8 mm seat, compliant with the international standard.

This regulator is characterized by its robustness and simplicity, simply because it is a SPIRO 8 with a new design. Its first stage retains a plastic piston while being equipped with one HP outlet and three MP outlets mounted on a turret. Its main drawback remains its fixed yoke, which does not allow for DIN conversion, which will ultimately lead to its commercial failure.

SERIES 25 FIRST GENERATION
1978-1979
Série 25

In 1978, the first generation of the 25 SERIES appeared with three versions: 25/10, 25/20, and 25/30.

Unlike the 20 SERIES, this range features a pivoting yoke, allowing for the installation of a DIN version.

The 25/10 and 25/20 models are equipped with a yoke, with a first-stage HP seat meeting the French and international standards, respectively. The 25/30, on the other hand, is the version specially designed for use in DIN.

Its first stage relies on a metal piston mechanism, the design of which is inspired by that of the 20 SERIES, but without the turret for the MP outputs.

40 SERIES FIRST GENERATION
1978-1980
Série 40

In 1978, the 40/10 and 40/30 SERIES also appeared. The 40/10 model, in a stirrup version, came with a HP seat compliant with French standards, with an optional seat compliant with international standards. Therefore, there was no 40/20. The 40/30, on the other hand, corresponded to the DIN version.

Its first stage features a balanced piston, while the second stage incorporates an injector and an oversized whisker, providing excellent breathing and expiratory comfort. It also features one HP outlet and three MP outlets, mounted on a swivel turret.

50 SERIES FIRST GENERATION
1978-1980
Série 50

In 1978, the 50/10 and 50/30 SERIES also appeared. Like the 40 SERIES, the 50/10 model, in the yoke version, was supplied with a French-standard HP seat, with an optional international-standard seat. The 50/30 corresponds to the DIN version.

The first stage relies on a balanced piston, but is distinguished by a movable nozzle, allowing the medium pressure to be adjusted using a knob located at the end of the body. The second stage is equipped with an injector and also incorporates an adjustment knob, allowing the sensitivity of the LP valve to be adjusted. In addition, its oversized whiskers improve breathing and expiratory comfort.

Like the 40 SERIES, this model has one HP outlet and three MP outlets mounted on a turret. The main differences between the 50 and 40 SERIES therefore lie in the addition of a sensitivity adjustment on the second stage and the possibility of varying the average pressure on the first stage.

1980'S SERIES GENERATION

En 1980, LA SPIROTECHNIQUE introduit un premier étage entièrement repensé pour la SÉRIE 25.

Plus compact et donc plus léger, il conserve néanmoins sa robustesse, marquant la fin du lourd cylindre de 800 grammes. La nomenclature des modèles 25/10, 25/20 et 25/30 reste inchangée, dans la continuité de la génération de 1978.

 

Le second étage bénéficie également d’une refonte avec un mécanisme simplifié : le levier bifide disparaît, tout comme la buse vortex en plastique noir au profit d'un levier.

 

Parallèlement, la SÉRIE 20 est arrêtée en 1980, après seulement deux ans d’existence. Elle cède sa place à un nouveau modèle : le SPIRO CLUB. Ce dernier conserve l'étrier fixe, marquant ainsi la naissance de la première version détendeur dénommée « club ».

SPIRO CLUB
1980-1983
Spiro club

Launched in May 1980 to replace the SERIES 20, the SPIRO CLUB stood out for its robustness and reliability, designed like a true "tank."

SPIROTECHNIQUE specifically developed it to compete with SCUBAPRO's MK2 180, a piston-driven regulator renowned for its simplicity and efficiency. Although an excellent model, it failed to dethrone its worldwide success.

SERIES 25 SECOND GENERATION
1980-1983
Série 25-2de version

In 1980, LA SPIROTECHNIQUE unveiled the second generation of the 25 SERIES. The 25/10 and 25/20 models retained a yoke, with HP seats compliant with French and international standards respectively, while the 25/30 represented the DIN version.

The first stage remained based on a piston mechanism, but its design was significantly reduced in size, resulting in a more compact design. It was also distinguished by the absence of a turret for the MP outlets.

SERIES 40 SECOND GENERATION
1981-1983
Série 40-2de version

In 1981, the 40 and 50 series were improved with the introduction of a new second-stage mechanism, the addition of new whiskers, and the replacement of the first-stage HP seat. The bronze filter was now integrated inside the seat.

SERIES 50 SECOND GENERATION
1981-1983
Série 50-2de version
1983 SERIES GENERATION

In 1983, LA SPIROTECHNIQUE returned to the diaphragm regulator with the famous PRO SERIES. This model was initially equipped with a neoprene valve, quickly replaced by a Teflon valve. It was offered in four versions (PRO, PRO S, PRO R, and PRO RS), each of which could be fitted with a French, international, or DIN seat.

A new regulator was introduced in the 25 series: the EXPLORER, available in a single-stage version or an R version with an adjustable second stage. Launched on the market in 1983, it was designed to replace the 40 and 50 SERIES regulators starting in 1984.

SPIRO EXPLORER
1983-1986
Spiro explorer

Launched in 1983, the EXPLORER regulator was offered in two versions with a metal second stage: a standard version and an R version, the latter equipped with a sensitivity device. Its first stage operates with a compensated piston and features one HP outlet and three MP outlets. This model represents a good compromise between the SPIRO CLUB and the SERIE 25.

In July 1985, LA SPIROTECHNIQUE introduced a new version: the EXPLORER XL. Identical to the 1983 versions, it differs only in its XL housing, available with a yellow or black cover. Like the other models in the range, each version is available with a yoke mount (with a French or international HP seat) or DIN mounting.

SPIRO PRO FIRST GENERATION
1983
Spiro Pro

The PRO SERIES is a regulator equipped with a diaphragm first stage, a technology that LA SPIROTECHNIQUE had not used since the AQUILON. Inspired by the US DIVERS CONSELF model, it is the ancestor of the SUPRA.

When it was launched in 1983, it was equipped with all-metal second stages and was available in four versions: PRO, PRO R, PRO S, and PRO RS, each available with yoke or DIN mounting. The letter R indicates a second stage equipped with a sensitivity device, while the letter S designates an oil-filled first stage, designed for cold-water diving.

Note that the first models, released in 1983, were equipped with a neoprene HP valve, which was replaced in 1984 by a Teflon valve.

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