## Expansion vessel

### Expansion vessel with bellow

Input Result
System volume Vs=
Min temperature Tmin= ˚C
Max temperature Tmax= ˚C
Min operating pressure Pmin=
Max operating pressure Pmax=
Expansions volume Vex=
Spare volume Vr,min=
Opening pressure Pini=
Min opening pressure Pini, min=
Min nominal volume VN,bälg=

### Expansion vessel with pump or compressor

Input Result
System volume Vs=
Min temperature Tmin= ˚C
Max temperature Tmax= ˚C
Utilization η=
Expansion volume Vex=
Spare volume Vr,min=
Min nominal volume VN,pump=

### Filling pressure

Input Result
System volume Vs=
Nominal volume VN=
Spare volume Vr,min=
Filling temperature Tfill= ˚C
Min temperature Tmin= ˚C
Min operating pressure Pmin=
Filling pressure Pfill=

### Expansion vessel

An expansion vessel is designed to handle medium varying volume caused by temperature differences. Calculations are made ​​to handle clean water.

### System Volume

Refers to the total volume of liquid in the system.

### Min temperature

Is used to get the right density at the lowest temperature of the water in the system.

### Max temperature

Used to have the right density at the highest temperature of the water in the system.

### Min working pressure

Refers to the minimum operating pressure of the system.

### Min working pressure

Refers to the maximum operating pressure of the system.

### Expansion Volume

The volume system volume increases due to temperature differences.

### Reserv volume

Reserv volume is a safety margin that you want on the vessel. Is the expansion volume under 15l estimates the reserve volume as 20% of the expansion volume. Is the expansion volume larger than 15l is my reserv volume to 0.5% of the system volume, but at least 3 liters.

### Opening pressure

The pressure gets expansion tank to begin taking on water.

### Min opening pressure

The minimum opening pressure as standard.

### Min nominal size

The estimated minimum volume of the vessel.

### Utilization

Defines the proportion of vessel used.

### Filling Temperature

The temperature of water used to refill the system.

### Filling pressure

The pressure on the media needed to replenish the system.