Sundstrom SR561 Installations- und Benutzerhandbuch

Companion module:

Sundström SR561 supplied air hood —HOW

TO…

Related material:

Sundström SR507 supplied air regulator

Sundström SR99 supplied air filter

Sundström SR500 Powered Air Purifying

Respirator (PAPR)

Sundström SR700 Powered Air Purifying

Respirator (PAPR) for particles

About your SR561 supplied-air hood:

What is it?

A supplied-air hood is a respiratory protection

device that covers your face, head, neck and

top of the shoulders. A continuous flow of

clean breathing air is fed into the loose-fitting

head-top.

How does it work?

Clean air from a remote source (such as a

compressor or a powered fan unit) is fed into

the hood through the breathing hose at a

constant flow rate. This keeps the head-top

filled with clean breathing air at a higher

pressure than outside air, preventing any

contaminated air from entering the hood.

The main advantage of this device is that it

does not rely on a tight face seal and does not

have to be fitted perfectly to the user’s face.

This means that even bearded people can use

the SR561.

Advantages

There are many benefits associated with

wearing a loose-fitting head-top as opposed to

a tight-fitting respirator. Advantages include:

•Can be connected directly to a fan

unit, such as SR500 or SR700

•Can be used with a fixed air supply

through the SR507 regulator

•Often a good solution for bearded

users or users with skin complaints,

dentures, unusual face features or

other problems that may hinder the

use of tight-fitting masks

•Durable material

•Impact and chemical resistant visor

Drawbacks

If you decide to connect the SR561 to a

fixed air supply, mobility can be restricted

by the supply hose. In addition, the length

of the hose limits the distance the wearer

can move away from the source of the

breathing air.

If a PAPR is chosen, the user is no longer

limited in movement.

IMPORTANT: about the quality of remote

supplied air for breathing:

•The intake air at the source

(compressor etc.) must be free of

contaminants, or at least kept to a

minimum and never exceed hygienic

limit levels

•Any mineral oil content must be kept

below the smell threshold level (about

0.3 mg/m3)

•The air must not be so cold as to cause

internal freezing of the equipment

If there are any doubts as to any of the

points above, a supplied-air filter should

be used, such as the Sundström SR99

airline filter in the picture

Where can the SR561 be used?

The SR561 supplied-air face shield can be used

in more situations than negative-pressure

filter respirators:

•Wherever negative-pressure filter

respirators can be used

•Where the user has a beard, stubble,

moustache, goatee, whiskers,

sideburns or other facial hair that can

interfere with the facial seal of a

respirator

•Skin conditions, severe acne, dentures,

unusual face shape/size, inability to

wear a tight-fitting respirator for

psychological or other reasons

•Where the contaminant has poor

warning properties (smell or taste)

•Where the contaminant is particularly

toxic (such as two-pack paint; toluene

diethylamide and others)

•Where the concentration of the

contaminant is so high that filter

respirators are not permitted

•In flammable atmospheres (the SR561

is made from materials that cannot

cause frictional sparks)

When should the SR561 NOT be used?

•If there is not enough oxygen for

human breathing in the ambient

atmosphere

•If the contaminant is unknown

•If the contaminant is Immediately

Dangerous to Life and Health (IDLH)

•If the ambient atmosphere is oxygen-

enriched or pure oxygen

•If breathing becomes difficult

•If you can smell or taste any

contaminant

•If you feel dizzy or nauseous, or suffer

any discomfort

•If the air-pressure warning sounds

Before fitting the head-top:

•Make sure the head-top is clean and

intact

•Make sure it is securely connected to

the air supply

•Make sure the quality of the breathing

air is adequate

•Make sure you are familiar with the

equipment and know how to use it

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