SECTION 11
SPECIFICATIONS
Jan 2003
Page 11-6
05114665c
11.4 Cooling Water Specifications
Depending on the type of cooling system (closed recirculation, once through,
etc.), the following common problems can be experienced:
Closed recirculation:
Corrosion
Fouling
Once through:
Corrosion
Fouling
Scale
Microbiological
Scale control is the most common problem, and is the result of insoluble matter
deposited on the heat transfer surface. Calcium carbonate is the primary cause
of scale when calcium bicarbonate breaks down. As the temperature of the
water increases it becomes less able to hold carbonates in suspension.
To predict the tendency of scale formation, the Langelier's saturation index can
be used as a guide.
Saturation Index = pH-pHs where pHs is calculated at saturation with calcium
carbonate.
A positive index indicates a tendency to deposit calcium carbonate, the higher
the positive value, the higher the scale formation. A zero index corresponds to
water that is in equilibrium with respect to calcium carbonate.
11.5 Orifice Support Capacity
The SL-IV100hp Waterjet Pump supplies high pressure (HP) water up to 3,800
bar (55,000 psi). The following table shows size, ratings, and maximum
quantity of orifices that can be supported.
Rated power
kW(hp)
Pressure
Bar (Psi)
Flow
lpm (gpm)
Qty
Orifice Diameter
mm (inch)
75(100) 3,800 (55,000) 7.6 (2.0) 1 0.51 (0.020)
60(80) 3,800 (55,000) 6.1 (1.6) 1
0.46 (0.018)
75(100) 3,800 (55,000) 7.6 (2.0) 2
0.36 (0.014)
53(70) 3,800 (55,000) 5.3 (1.4) 2
0.30 (0.012)
75(100) 3,800 (55,000) 7.6 (2.0) 4
0.25 (0.010)
75(100) 3,800 (55,000) 7.6 (2.0) 8
0.18 (0.007)
75(100) 3,800 (55,000) 7.6 (2.0) 16
0.13 (0.005)
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