1. WORKING CONDITIONS
Medium temperature: -25℃ ~ +50℃
Max relative humidity: 95%
Periodical swing: ±22.5°
Continued transversal incline: ±15°
Continued longitudinal incline: ±10°
Vibration: existent
Impact:  existent
2. CHARACTERISTICS
Small size and light weight.
Low noise and low vibration.
Good anti-corrosiveness.
Good air tightness.
Small starting torque.
Strong resistance against swing,
vibration and impact.
3. STRUCTURE TYPE
The ventilator is designed and manufactured into a horizontal structure type or a vertical one, which the vane wheel is mounted directly on the motor shaft extension.

The vane wheel, being riveting structure is made of aluminum alloy and carefully balanced by static and dynamic ways.
    Both the machine casing and the inlet are made of welded common steel with airtight structure:
The ventilator can be made for left or right rotation:
Left rotation-viewed from the motor side, the vane wheel rotates anti clock-wise and indicated as “L”.
Right rotation-viewed from the motor side, the vane wheel rotates clockwise and indicated as “R”.
The outlet position of ventilator, according to the rotating direction of vane wheel, is made into the following main types. In conformity with the requirement, the outlet position is allowed to use other types, the step angle of which is 30°or 22.5°.

4. PERFOMANCE SELEDTION
The performance parameters shown in the tables are the air properties under standard atmospheric conditions ( i. e. the atmospheric pressure 101325 Pa; temperature 20℃; relative humidity 50% and the air specific  gravity  1.2kg/m³).

In case the actual air conditions and the rotating speed differ from those shown in the tables, the performance of the ventilator can be
converted according to the following formulas:

Q=Q0·                ( m3/h )

P=P0·()2·         ( Pa )

N=N0·()3·         ( KW )

Among which: 

Q0 、P0 、N0、are the volume of flow, pressure, power, and the specific gravity under standard air conditions and rotating speed.

Q、P、N、ρ、n indicate the actual volume of flow, pressure, power and air specific gravity and rotating speed.

Remarks:

1.The allowable error of the full pressure value under standard volume is -5%~+10%。

2. The limit values of noise of the ventilator is:

LA≤26+10 lgP2Q

where：P-mmH2O

       Q-m3/min

The ventilator can be matched with marine AC motor of 380V, 50HZ or 440V, 60HZ types.

 5. MODEL EXPLANATION
The model of ventilator is indicated with the first letter of the Chinese phonetic name, the vane wheel diameter and the standard speed etc.
For example:

Among which：
J、C — marine use
L — centrifugal ventilator
Q — forward vane blade
39 — outer diameter of the vane wheel 390mm
5.5 — the motor power 5.5kw
1460—standard rotating speed 1460r/min(50Hz)
R270—right rotation; air outlet position 270°.

6. Introduction for ordering
6.1  Please introduce the model, flow prate, pressure, speed and structure of fan、50HZ or 60HZ..
6.2 Please offer insulation class and protection class for fan motor (if not, the insulation class is B, protection class is IP44).
6.3 Our factory can offer the fans of special specification and usage according to the user's demands.
6.4  We are responsible for the repair, exchange and return of the products Within 18 months.
7. Use and maintenance
7.1、Before installing the fans, should check whether each part is intact, whether the components are complete, whether the impeller and casing rotating direct are concordant.
7.2、The air enter the fan from axial direction and come out through the impeller. It can be used for left or right rotation.
7.3、When installing the duct of the inlet and outlet, should make the duct and fans be spontaneous indentical, not join them forcing, not bring the weight of duct on the fans.
7.4、After installed the fans, check whether there is friction of collide between the impeller and the fixed parts by rotating the impeller. If collision, friction, loud noise or strong vabration happened, the fan should be restart after checking.Avoid the fan being bumpped and other substance or liquid entered the fans.Please clean the dust on blade of impeller in. time, so as not to break the balance and strengthen the noise.
7.5、The fans should be start-up without load. Before the fans started, should close the inlet or the adjust fittings. After operating, start to turn on it until to the formulary work state.
7.6、The impeller’s rotating direct and the direct of the arrow should be concordant.
7.7、After the fans wiring, the terminal box should be sealed, avoid the air or water in it.
7.8、As the fans operating, the motor electric current should be control strictly, not exceed the rated electric current. Avoid the motor burning,
7.9、The fans maintain must be done on stop working time. When burning, after check, should whether the every part of fans is normal.
7.10、As some falt occurred in fans operating, should find out the reason in time and think a way of resolution.