Nextteq Standard Airtec Regulator Kit - Manual (Page 16)

SECTION I: Introduction
16 NEXTTEQ LLC (Rev. 2) 4/09
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2.1 REGULATOR
The regulator is a two-stage breathing air
regulator. It is preset at the factory to
deliver 50 psig to the flow meter. It is
precision-machined from solid brass
stock. Internal parts are protected by a
double filter system of sintered Monel
metal, backed by sintered bronze. A
preset safety device prevents
overloading.
Warning
The regulator has a maximum inlet pressure
of 3000 psig. Do not exceed maximum inlet
pressure. The regulator will not operate
properly if the inlet pressure drops below 50
psig. The preset delivery pressure of 50 psig
should not be altered. Above 60 psig, the
safety valve will vent off excess pressure to
prevent damage to the flow meter.
The Regulator specifications are shown in
Table 3 (below).
2.2 FLOWMETER
The flow meter is a ball and tube
assembly equipped with a metering
valve. The system is backpressure
compensated to maintain constant flow
when downstream pressure fluctuations
occur. It is calibrated for a delivery
pressure of 50 psig and for readings at
the center of the ball (refer to Figure 4,
page 17)
For maximum accuracy, the flow meter
should be mounted vertically. This may
be checked with a level, although setting
“by eye” is adequate. The flow meter
ball should float and rotate freely
throughout the length of the tube.
The flow meter is calibrated a 70
°F
(21.1
°C) and 50 psig for breathing air.
Caution
It is not suitable for use with other gases
and cannot be used with pure oxygen.
Read the flow meter at the center of the
ball. The flow meter is marked with
lines at 25 cc/min increments and
numbers at 100 cc/min increments.
Important
The flow meter is housed in a pressurized
cover tube. Cracks or leaks in the cover
tube will affect system accuracy. Leaks
between the flow meter and the tube holder
will result in low tube readings.
Flow meter specifications are shown in
Table 4 (page 17).
TABLE 3
REGULATOR SPECIFICATIONS
ITEM
SPECIFICATION
Maximum Inlet Pressure 3000 psig
Outlet Pressure 50 psig preset
Inlet Gauge Range 0-4000 psi
Inlet Connection CGA 346 (CGA – 590 available)
SECTION II: Airtec Kit Components