Second Stage - Tusa RS-350 Manual Del Propietário

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Regulators
ond stages.The balanced diaphragm method first stage features minimum variation
in intermediate pressure in response to changes in residual cylinder pressure and
depth. The ports are in left-right symmetry (H.P. × 2, L.P. × 4) for easier attachment
to tanks, even for beginners.
R-700 first Stage
The R-700 is a balanced diaphragm first stage with key design and performance
characteristics:
1) Four intermediate pressure ports and two high pressure ports, 2) Balanced first
stage, with a built-in antifreeze system, 3) Replaceable HP seat and HP poppet for
durability and servicing, 4) Two special high flow LP ports (HFP) close to the dia-
phragm offer approximately 15% greater air flow, 5) Dry balance chamber prevents
water contact with the diaphragm and the spring for superior cold water perfor-
mance. The R-700 meets the European Standards EN250:2014 requirements for
cold water conditions.
GB
R-800, 800S first Stage
The R-800 is a balanced piston type first stage offering superior reliability for stable
air supply regardless of depth or residual pressure. It is equipped with four interme-
diate low pressure ports and two high pressure ports.
R1000 first Stage
The R1000 is a balanced diaphragm first stage with four intermediate pressure ports
and two high pressure ports. Two special high flow low pressure ports (HFP) close
to the diaphragm offer approximately 15% greater airflow. The R1000 meets the Eu-
ropean Standards EN250:2014.

2.2 SECOND STAGE

Demand system
* The demand system is designed to significantly reduce rubbing resistance of mov-
ing 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 dur-
ing 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
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