DIRECTION FOR USING THE NEW MODEL OF DEMAND VALVE
The new model of demand valve is designed according as the latest model that is applied over the world, In comparison with the traditional demand valve, the new model of demand
valve possess numerous advantages. such as the reasonable construction, the smaller size , the higher positive pressure , the lower respiratory resistance . The convenience for maintenance.
This model of demand valve contains the hand button and bypass assembly. When the switch of the cylinder valve is opened, you must close the air port (push the hand button inwardly)
following checking bypass assembly ( turn the red 'button a quarter round clock wisely). You can wear the mask when you have confirmed there is enough airflow out from the air port. A sound of ˇ° popˇ± accursed at the moment means that the demand valve is through. the positive pressure is developed in mask and the air supply is being donely.
1.
Model ZHK-1 Breathing apparatus (normal pressure)
RHZK positive
compressed-air system is a new model of self-supporting open respirator.
which is designed for fireman and person who trapped in rescue situations
with smokyˇ˘ pollution. hot .vapor and/or kypoxygen such as fire chemistry
industry. Fired boat. Petroleumˇ˘ industry smeltˇ˘ storehouseˇ˘ laboratory
and mining area. To perform the extinguish. Rescue and ambulance.
This. Product system provide user with a qualified air-tight face mask
which possess wild mission field and highly transparent. The air-supply
set provide user with a new model of stable demand valve with the properties
of smaller size and lightweight. The backboard is made of qualified stress
material. The cylinder containing high pressure of air possesses a proper
safe parameter. The reduce valve assembly provide an alarm, which would
sound a whistle at certain range of air pressure to warn user to leave
the danger situation in time.
This product
system has following advantages compared with similar products, lightweight,
smaller size, convenience for use and for maintain, comfortable for wear,
work with a stable. function. This is satisfied respirate-protect equipment
for fireman and rescue man.
MODELS AND TECHNICAL PARAMETER
Tab. I
Parameter of heavy cylinder unit
|
Model |
RHZK 6.8/30 |
RHZK 5/30 |
RHZK 6/30 |
|
Working Pressure (MPa) |
30 |
30 |
30 |
|
Volume (L) |
6.8 |
5 |
6 |
|
Maximum Flow (L/min) |
300 |
300 |
300 |
|
Respiratory |
<687
<583 |
<687 <588 |
<687
<588 |
|
Alarm Pressure (MPa) |
4-6 |
4-6 |
4-6 |
|
Using Term (min) |
70 |
50 |
60 |
|
Total weight (Kg) |
<8.5 |
<12 |
<14 |
|
Packing Size (cm) |
80ˇÁ30ˇÁ48 |
70ˇÁ30ˇÁ47 |
80ˇÁ30ˇÁ48 |
REMARKS: the system of positive compressed-air respirator had been shortened as ZHK. Accordant to the GA120-1996, the system is marked as RZHK; R means firemen personal. equipment; H means code of respirator; ZK is the special code of product: Z means positive pressure; k means air.