BUSCH DUPLEX - Cooling Water Connection (Optional)

6 | Installation
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6.2.3 Cooling water connection (optional)
• Connect the cooling water line to the cooling water inlet of the vacuum pump (CWI,
fig. 8).
• Connect the cooling water line to the cooling water outlet of the vacuum pump
(CWO, fig. 8).
Connection size: 19 mm hose (CWI/CWO).
CWI
Cooling water supply
WHE
Oil/water heat exchanger
CWO
Cooling water drain
Fig. 8 : Cooling water connection
Regarding the cooling water, the following prerequisites must be met:
Supply capacity
l/min.
2.5
Water pressure bar 2 … 6
Supply temperature
°C
+5 … +35
Required differential pressure between the inlet and return
bar
≥ 1
We recommend the following water qualities to keep the maintenance effort limited and
extend the service life of the product:
Hardness
mg/l (ppm)
<90
Properties
pure and clear
pH value 7-8
Particle size
µm
<200
Chlorine
mg/l
<100
Electrical conductivity
µS/cm
≤100
Free chlorine
mg/l
<0.3
Materials in contact with cooling water
Rust-free steel, copper and cast iron
NOTICE
Conversion of the unit for water hardness.
1 mg/l (ppm) = 0.056 °dh (German degree) = 0.07 °e (English degree)
= 0.1 °fH (French degree).