Alfa Laval LKHex-10, Инструкция по эксплуатации

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4 Operation
Read the instructions carefully and pay special attention to the warnings!
4.2 Operating parameters
General:
Maximum ambient temperature: -10°C to +30°C
Maximum pump speed: 3600 rpm
Only Exd and Exde motors are designed to run with a variable speed drive.
Pump unit:
Maximum inlet pressure
LKHex-10-60, 50/60 Hz
1000 kPa
(10 bar) (145 psi)
Maximum inlet pressure LKHex-70, 50 Hz 1000 kPa
(10 bar) (145 psi)
Maximum inlet pressure LKHex-70, 60 Hz 500 kPa (5 bar) (72 psi)
Maximum product temperature, see table below:
Type of elastomer Temperature class T4 Temperature class T3
EPDM 110°C / 230°F 110°C / 230°F
FPM 110°C / 230°F 140°C / 284°F
NBR 80°C / 176°F 80°C / 176°F
FEP encapsulated 110°C / 230°F 140°C / 284°F
Minimum product temperature: -10°C / 14°F
Maximum product viscosity: 800 cSt
Shaft seal:
More information about the mechanical shaft seals can be found in chapter 6 Technical data.
Single shaft seal (SSS)
-
The SSS is lubricated and cooled by the processed media.
It is therefore important to pay special attention to the operating limits of the pump unit.
Double mechanical shaft seal (DMS)
Auxiliary support system Minimum pressure of
buffer/barrier fluid Maximum pressure of
buffer/barrier fluid
Buffer fluid*
> 0 bar / psi 5 bar / 72.5 psi**
Barrier fluid* Pump discharge
pressure plus 1 bar
/ 14.5 psi 5 bar / 72.5 psi
* Description of the two systems can be found in chapter 6 Technical data
** Pressure must be lower than the pump discharge pressure.
If the viscosity of the processed media is less than 10 cP when using silicon carbide vs. silicon carbide, ONLY barrier fluid
is applicable.
Minimum flow rate of buffer/barrier fluid: 30 l/h (8 gal/h)
Minimum temperature of buffer/barrier fluid: -10°C / 14°F
Maximum temperature of buffer/barrier fluid: Product temperature or max. 70°C (158°F)
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