Sundstrom SR307, User Instruction

5

Temperature range use

14 ºF - 131 ºF (-10 ºC to +55 ºC) and a relative humidity below 

90%.

Weight

Weight without regulator: 2.8 oz (80 g).

Working pressure

58–102 PSI (4–7 bar) measured at the connection to the 

regulator.

4.  Maintenance

Personnel who are responsible for maintenance of the equip-

ment must be trained and well acquainted with this type of work.

4.1  Cleaning

The SR 307 should be cleaned in the following manner: Use 

a piece of soft cloth or a sponge dipped in a solution of water 

and dishwashing detergent or the like. Rinse and leave to dry.  

Sundström cleaning wipes 5226 can be used to advantage 

for cleaning. 

For particulars of cleaning of the Sundström half mask and full 

mask, see the appropriate user instructions.

4.2  Storage

After cleaning, store the equipment in a dry and clean place at 

room temperature. Avoid direct sunlight.

4.3  Maintenance schedule

The schedule below shows the minimum requirements on 

maintenance routines to assure the user that the equipment 

will always be in usable condition.

Before 

After 

After two

use 

use 

years

Visual inspection 

•

•

•

Functional check 

•

•

Cleaning  

•

4.4  Spare parts

Use only genuine Sundström parts. Don’t modify the equip-

ment. The use of ’pirate parts’ or any modifications made to the 

equipment may reduce the protective effect and compromise 

the approvals granted to the equipment.

4.4.1  Regulator

The regulator is a complete, sealed unit. Don’t attempt to 

repair or modify it.

4.4.2  Breathing hose

To change the breathing hose, proceed as follows:

•  Cut off the hose clip with a pair of pincers and pull the hose 

off. Fig. 5.

•  Thread the hose clip and retaining clip (Fig. 1:11) onto the new 

hose. Connect to the compressed air attachment (Fig.1:2) 

and use a pair of pincers to nip the hose clip. Fig. 6.

•  Apply a load to the hose to check that it is firmly secured to 

the compressed air attachment.

5.  List of parts

The item numbers below refer to Fig. 1 at the end of the user 

instructions. Parts marked with an asterisk (*) are not shown.

5.1  Spare parts

Item Part 

Order  No.

1 

Breathing hose 

R03-1428

2 

Compressed air attachment  

R03-1425

3 Belt 

R03-1510

4 

Flow meter 

R03-0346

5 

Regulator assembly SR 347 

R03-1421

* 

Service kit 

R03-1417

6 

Locking ring 

-

7 

Protective cover 

- 

8 Membrane 

-

9 Silencer 

-

5.2  Accessories

Item Part 

Order  No.

* 

SR 358 plastic hose. See section 3

* 

SR 359 rubber hose. See section 3

* 

Cleaning tissues, box of 50 

H09-0401

* 

Cleaning tissues, box of 1,000 

H09-0402

6.  NIOSH/DHHS Labels

(Separate insert pages included with this booklet)