23
Chapter 4 Specification
◎
The cooling water and lter element need to be replaced once a month; before
winter (referring to low temperature environment of 0° C and below), the cooling
water should be replaced with a suitable antifreeze (for example, glycol antifreeze,
excessive addition is strictly prohibited, antifreeze thermal conductivity coefcient)
Low, excessive addition may cause poor heat dissipation). After the winter is over,
the antifreeze should be replaced with distilled water and the lter element should be
replaced to restore the maintenance frequency once a month.
4-
QBH
Water Cooling Condition
Cooling
Method
Water pipe size
requirement
Water Flow
Rate
（
L/min
）
Hydraulic
pressure
（
bar
）
Cooling
Temperature
（℃）
Water
cooling
Outer diameter* inner
diameter=Φ6*Φ4
≥2 ≥3 28-30
NOTE:
◎
External light path tube inner diameter ≥ 8mm, length ≤ 15m;
◎
The length of the Φ6 pipe connected to the LOE after switching from the external
light path is ≤ 1m;
◎
QBH is connected in series with the cutting head;
◎
The above recommended external light path water pressure requires the pressure
drop of the cutting head Δp ≤ 1.5bar. If this value is exceeded, the external light path
water pressure should be increased accordingly.
NOTE:
◎
Water pipe color: blue input water, red return water.
Total length
<1m
DN25 (1 inch tube), length ≤ 2m
Inner diameter ≥ 8mm, length ≤ 15m
QBH
Cutting
head
Adapters
water
cooling
machine
Low temperature water circuit
High temperature water circuit
(external light path)
Adapters
Quick-insert water pipe
outer diameter 12mm
Inner diameter 4mm
Inner
diameter
4mm
Quick-insert water pipe
outer diameter 12mm
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