3M 256-02-00 Istruzioni per l'utente - Pagina 4

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General Description

A complete 3M Portable Compressed Air Filter and Regulator Panel with CO Filtration and

Monitor will operate as follows. (Fig. 1)

1. Air entering the four-stage filtration system at the inlet (A) is usually contaminated with oil,

water, dirt, rust, scale and vaporous hydrocarbons.

2. As the air passes through the first stage of the prefilter (B), particulate matter 3.0 microns and

larger are trapped and retained.

3. The air then enters the second stage of the prefilter (C) which traps particulate matter larger

than 0.3 microns and coalesces liquid aerosols with an efficiency rating of 99.97%. The liquid

contaminates are trapped in the lower chamber of the prefilter and expelled through the

automatic float drain (D).

4. The third stage (E) contains a bed of odor absorbing activated charcoal.

5. The fourth stage (F) contains a low temperature catalyst which converts approximately 60% of

any carbon monoxide to carbon dioxide.

6. The air is then passed through the air pressure regulator (G), which is used to adjust the air

pressure going to the respirators.

7. A sample of the filtered air is taken at (H) and passed through the carbon monoxide monitor (I).

8. The carbon monoxide monitor continuously checks the carbon monoxide concentration and

digitally displays the amount present in ppm (parts per million). An audio and visual alarm will

alert operators if carbon monoxide concentrations exceed a preset level (10 ppm USA;

5 ppm Canada).

W WARNING

The 3M™ Portable Compressed Air Filter and Regulator Panel 256-02-00, with CO Filtration

and Monitor should not be used when the air entering the filtering system is oxygen deficient.

These units will not increase the oxygen content of oxygen deficient air. Use with oxygen

deficient air may result in sickness or death.

Fig. 1

SPECIFICATIONS

Inlet pressure (max.)

125 psig static (8.6 bar)

Rated air flow (max.)

50 scfm (1416 L/min)

Inlet pressure (recommended)

90-120 psig (6.2-8.3 bar)

Outlet pressure range

0-125 psig (0-8.6 bar)

Operating temperature range

68-150°F (20-65°C) (compressed air temperature

at inlet of panel)

0-110°F (¯17-43°C) (ambient air temperature)

Dimensions

23.25"L x 20.75"W x 9"D

(590mm x 5276mm x 229mm)

Weight (includes monitor)

31 lbs. (14.1kg.)

3M Respirator Capacity

The 3M filter and regulator panel with CO filtration is supplied with quick-disconnects at the

outlet for connection of up to four (4) supplied air respirators. The actual number of respirators

that may be connected to the filter and regulator panel is dependent on the inlet pressure to the

panel and the airflow and pressure requirements of the respiratory protection. (Fig. 2) As the air

passes through the panel there is resistance to flow called pressure drop. The more airflow

through the filter and regulator panel, the greater the pressure drop. The air control devices

approved for use with the 3M respirators must be operated within the supply pressure ranges and

hose lengths stated in their User Instructions. Use Figure 2 along with information on the

maximum airflow consumption, supply pressure ranges, and approved hose lengths as stated in the

User Instructions for the 3M air control device to determine the number of respirators of a specific

type that may be connected to the panel.

Fig. 2