First Stage; Second Stage; Technical Features - Scubapro MK25T Handbuch

4.1

First stage

A pressure-reducing mechanism that reduces the pressure of the compressed air contained
in the cylinder to an intermediate relative pressure of about 9.5 bars (138 psi). The fi rst stage
uses a standard piston, balanced piston or diaphragm mechanism.
4.2

Second stage

This unit is supplied, with the intermediate pressure coming out of the fi rst stage through the
low pressure hose. It reduces pressure further to balance air with the ambient pressure. The
second stage may be balanced or unbalanced and equipped with a Venturi effect control
(V.I.V.A.) and/or with an inhalation resistance control.
An example of a complete regulator and with either a DIN or INT connection fi rst stage,
depending on the tank valve:
1 First stage with threaded DIN connection
2 Second stage
3 INT/DIN inlet protective cap
4 DIN retaining wheel
5 Rotating swivel
6 High pressure port
7 Purge button
8 Exhaust defl ector
9 Inhalation resistance control
10 V.I.V.A. control
11 Low pressure hose
All SCUBAPRO regulators can be identifi ed via a serial number. The number is printed on the
housing of the second stage and on the metal body of the fi rst stage.
SCUBAPRO offers a lifetime warranty to the original owner of all SCUBAPRO regulators.
This warranty covers material and manufacturing defects (with the exception of o-rings,
seats, fi lter, mouthpiece and low pressure hose).
In order to maintain this warranty, it is mandatory to perform annual service on the regulator
by a Authorized SCUBAPRO Dealer service facility and maintain proof of service records.
For details on the warranty please consult a SCUBAPRO UWATEC Authorized Dealer.

5. TECHNICAL FEATURES

Our expertise in engineering and high quality components used in the manufacturing of
SCUBAPRO regulators, combined with over 40 years of experience, ensure the maximum
reliability and safety when you dive with a SCUBAPRO regulator. The main technical features
of SCUBAPRO regulators are detailed below. To verify which of these features apply to any
specifi c fi rst and second stage combination, refer to the tables at the end of this chapter.
4
Img. 1 Img. 2
1 First stage with yoke connection (INT)
2 Retaining yoke and screw
3 Protective cap
4 INT/DIN inlet protective cap
5 Dry balance chamber