111-0063-00 (Doc 556M)
Page 6 of 8
ISSUE H
18/03/2021
6. CLEANING AND DISINFECTION
6.1 Ensure demand valve is disconnected from the gas supply before cleaning.
6.2 Clean the device before first use and then subsequently after every use, ensure the
Demand Valve, including the handle is wiped over thoroughly with a disinfecting wipe. For
disinfection purposes a chlorine dioxide based product (eg the Tristel Wipes and solution
system) can be used, at a nominal concentration of 0.02% wt/vol. The concentration refers
to chlorine dioxide in water. Follow the manufacturer’s directions for safe use.
6.3 The
Demand Valve is not suitable for autoclaving.
6.4 The
Demand Valve should be thoroughly dried before storage.
7. MAINTENANCE
7.1 Maintenance must be carried out on the unit on a five yearly basis by B.N.O.S. Meditech
or engineers certified by B.N.O.S. Meditech. This activity involves dismantling the unit and
replacing all internal seals, diaphragm, medical gas supply hose and any components
which show significant wear and tear.
7.2 Performance should also be checked on a five yearly basis, using suitable test equipment.
The negative pressure required to generate specific flows from the device must be tested.
If required, B.N.O.S. Meditech Ltd. can advise on suitable test equipment.
7.3 For Demand Valves in frequent use, for example, an Ambulance Service or a Maternity
Unit, personnel trained to supervise the use of a Demand Valve should refer to 5.4 of this
Instruction For Use document and carry out the check as described on a regular basis. For
less frequent users, i.e. industrial safety use, a leak test should be periodically performed
by applying an oxygen compatible leak test solution to all medical gas supply hose fittings
and joints, where applicable. The suggested period is annually.
7.4 The medical gas supply hose MUST be changed every five years. Please contact the
manufacturer to determine the age of the hose fitted to the demand valve.
7.5 B.N.O.S. Meditech Ltd. offers training and certification on the service, repair and
preventative maintenance of its products.
8. SERIAL NUMBER
The Serial No. is to be found on the handle label of the demand valve. It consists of four sections,
the first letters expressing the general type of device, followed by numbers for the month and year of
manufacture and lastly a set of up to five numbers representing the individual “number” of the unit
and differentiating units built in the same month.
Example: ODV121700001
ODV 12 17 00001
Oxygen Demand Valve Month of Manufacture Year of Manufacture Number of Unit
9. PRODUCT LIFE SPAN
