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Heating Expansion Vessels

HEATING VESSEL SIZING GUIDE
Boiler Output Vessel size per System Static head
KW BTU/HR 5M 10M 15M
5 17060 8L 8L 8L
10 34120 8L 12L 18L
15 51180 12L 18L 25L
20 68240 12L 18L 35L
25 85300 18L 25L 35L
35 119420 25L 35L 50L
40 136480 35L 35L 80L

This Guide is for approximation only. For full calc. refer to British Standard.

IBHS offer a complete range of expansion vessels to meet the requirements of most heating or cooling systems.

Expansion vessels for heating systems are manufactured to meet the requirements of PED 97/23/EC Directive and BS EN 13831:2007 'Closed expansion vessels with built in diaphragm for installation in water'.

Design

The two halves of the vessel and the diaphragm are retained by a crimped collar to give a pressure tight seal.

  • Non-Replaceable diaphragm
  • Epoxy coated in red

Suitable for flow temperatures up to 120°C, resistant to ethylene or propylene glycol mixtures and has low gas permeability.

All our expansion vessels are all tested according to the Pressure Systems Directive.

How it Works

In a closed heating system water cannot be compressed so any increase in volume. created by an increase in temperature, has to be accommodated by an expansion vessel.

When water is cold, the pre-charge pressure forces the diaphragm against the tank towards the inlet.

As the temperature decreases, the pre-charge pressure forces the water from the tank and back into the main heating system.

This maintains a constant pressure within the heating system helping to reduce energy consumption.

Expansion Vessels

Materials

Shell     Carbon Steel

Connections    Carbon Steel

Diaphragm    Synthetic Rubber Compound

Coating    Powder Epoxy

Technical Specification

Max Working Pressure    8-35 ltr 3 bar

                                        50-140 lre 6 bar

Test Pressure     1.5 x Max Working Pressure

Max. flow operating temperature    120°C

Max. vessel operating temperature    70°C

Factory air pre-charge    1.5 bar - Nitrogen

 

14 Products

35 Litre Reflex Heating Expansion Vessel

Excl. VAT: £60.67

Incl. VAT: £72.80

8 Litre Reflex Heating Expansion Vessel

Excl. VAT: £25.56

Incl. VAT: £30.67

200 Litre Reflex Heating Expansion Vessel

Excl. VAT: £262.93

Incl. VAT: £315.52

250 Litre Reflex Heating Expansion Vessel

Excl. VAT: £272.99

Incl. VAT: £327.59

50 Litre Reflex Heating Expansion Vessel

Excl. VAT: £104.36

Incl. VAT: £125.23

12 Litre Reflex Heating Expansion Vessel

Excl. VAT: £26.13

Incl. VAT: £31.36

300 Litre Reflex Heating Expansion Vessel

Excl. VAT: £610.82

Incl. VAT: £732.98

80 Litre Reflex Heating Expansion Vessel

Excl. VAT: £193.69

Incl. VAT: £232.43

18 Litre Reflex Heating Expansion Vessel

Excl. VAT: £31.93

Incl. VAT: £38.32

400 Litre Reflex Heating Expansion Vessel

Excl. VAT: £502.59

Incl. VAT: £603.11

100 Litre Reflex Heating Expansion Vessel

Excl. VAT: £157.40

Incl. VAT: £188.88

25 Litre Reflex Heating Expansion Vessel

Excl. VAT: £43.18

Incl. VAT: £51.82

500 Litre Reflex Heating Expansion Vessel

Excl. VAT: £561.38

Incl. VAT: £673.66

140 Litre Reflex Heating Expansion Vessel

Excl. VAT: £193.66

Incl. VAT: £232.39

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