Second Stage - Tusa RS-790 Manual Del Propietário

Regulators
European Standards EN250:2014.

2.2 SECOND STAGE

Demand system
* The demand system is designed to significantly reduce rubbing resistance of
moving parts and air resistance. The result is smoother and more natural valve
opening/closing.
Light weight housing
* The second stage main unit is smaller and lighter to reduce water resistance during
diving, thus reducing the load on the face during use. The main body materials
are super-tough nylon (heat pliable polyamide resin) reinforced with glass fiber for
outstanding hardness and shock resistance. The materials also offer superior tensile
strength, dimensional stability, heat resistance, weather resistance and chemical
resistance.
EN
Intake resistance
* The second stage includes a director to forcibly guide air from the demand valve.
That prevents free flow while significantly lessening intake resistance. The result is
one of the lightest intake resistance values in the industry compared with products
from other companies.
Venturi Adjustment Lever (RS-790, 811S, 812S, 1001)
The addition of a venturi adjustment lever allows the regulator to power assist the
diver when underwater utilizing the natural venture effect. The diver can also adjust
the lever to prevent free flow such as on a surface swim.
Swivel joint (RS-812S)
For optimum performance and comfort, a swivel joint is fitted between the second
stage and the joint section of the low pressure hose. The swivel joint allows flexibility
of the hose for eliminate hose tension at the mouthpiece for a more natural and
comfortable bite.
Adjustable Control Knob (RS-812S)
The adjustable knob designed to better control breathing resistance.
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