BUSCH COBRA NC 0630 C, Инструкция по эксплуатации

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Product Description | 2
Instruction Manual COBRA NC 1000 B WCV_EN_en 7 | 40
2.3 Start Controls
The machine comes without start controls. The control of the machine is to be provided in the
course of installation.
The machine can be equipped with a soft-starter or a variable speed drive (not included in the scope
of supply).
2.4 Standard Features
2.4.1 Water Cooling
The machine is cooled by a cooling liquid circuit in the cylinder cover and cylinder.
The cooling liquid pump (CLP) allows a recirculating flow in the cooling liquid chamber.
The cooling liquid is cooled by a plate heat exchanger (PHE) which must be connected to the water
main.
2.4.2 Resistance Thermometer
The resistance thermometer monitors the cooling liquid temperature of the machine.
A trip signal must be set. The machine must be stopped when the cooling liquid temperature reach-
es 70 °C.
2.4.3 Level Switch
The level switch monitors the cooling liquid level in the cylinder.
The machine must be stopped when the cooling liquid level is too low.
2.4.4 Thermometer
The thermometer allows a visual display of the cooling liquid temperature.
2.4.5 Sealing Systems
The machine is equipped with labyrinth seals on the motor side and suction side.
Other sealing systems are optionally available, see
Mechanical Seals [
➔
8].
Sealing systems prevent the process gas going to the bearings chambers.
Depending on the application, the sealing systems efficiency can be improved with a barrier gas sys-
tem, see
Barrier Gas System [
➔
7].
2.5 Optional Accessories
2.5.1 Gas Ballast Valve
The gas ballast valve mixes the process gas with a limited quantity of ambient air to counteract the
condensation of vapor inside the machine.
The gas ballast valve has an influence on the ultimate pressure of the machine, see Technical Data.
A ball valve enables to open or close the gas ballast flow.
2.5.2 Silencer
A silencer at the discharge connection (OUT) can be provided to reduce the exhaust gas noise.
2.5.3 Barrier Gas System
The barrier gas system allows the supply of compressed air or nitrogen into the motor side shaft
seals in order to improve the sealing efficiency.