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Shaft seal forces
The parts of the seal inside the pump are subjected to an axial force from the pressure in the pumped liquid.
Shell and tube exchanger
Shell and tube heat exchangers exchange thermal energy from one fluid to another. Because it is characterised by low pressure loss, it is well-suited to air conditioning systems.
SI units
The International System of Units (SI) is the world's most widely used system of measurement, both in everyday commerce and in science
Silicone rubbers
Rubbers are flexible long chain polymers that can be stretched easily to several times their unscratched length and rapidly return to their original dimensions.
Soft pressure build-up
The 'Soft pressure build-up' function ensures a smooth start-up of systems containing empty pipes, for example.
Solenoid valve
Solenoid valves are broadly used for controlling heat or cooling with ON/OFF consumers. An electrical current is turned into a magnetic field, which opens or closes the valve mechanically.
Sources of legionella in commercial buildings other than water systems
Microbacterial growth is not only a problem in hot and cold water systems and cooling towers but also in many other applications in commercial buildings such as water fountains, spas, swimming pools and fruit and vegetable moisturising systems.
Specific density
The specific density of a material or liquid is the term used to describe the unit mass of a material or liquid.
Specific heat capacity
The specific heat capacity of a material or liquid is the term used to describe the amount of energy used to raise the temperature of 1 kg of the material/liquid by 1 K.
Speed controlled operation
Speed control by means of a frequency converter is without no doubt the most efficient way of adjusting booster pump performance exposed to variable flow requirements. The speed control method results in a new Q/H curve at reduced head and flow.