CAL-PRO expansion vessel for heating systems

Share this page:

The CAL-PRO expansion vessels absorb the water volume variations in closed heating systems maintaining constant pressure, helping to reduce energy consumption.

The broad range available meets the requirements of various heating systems.

CAL-PRO expansion vessel for heating systems
CAL-PRO expansion vessel for heating systems - Image 2
CAL-PRO expansion vessel for heating systems - Image 3
CAL-PRO expansion vessel for heating systems - Image 4
CAL-PRO expansion vessel for heating systems - Image 5
CAL-PRO expansion vessel for heating systems - Image 6
Overview
  • Carbon steel shell and connection construction
  • Synthetic butyl rubber diaphram (SBR)
  • 5 years warranty
  • 100% factory tested
  • Epoxy-Polyester Powder Finish
  • Suitable for multiple types of heating systems
  • MIG welding eliminates interior rough spots and sharp edges
  • Manufactured accordin to PED 2014/68/EU for centralised non-potable water heating systems

Technical Information

  • Operating Temperature: -10°C to 99°C
  • Max Working Pressure: 4 Bar (35-50L), 6 Bar (80-900L)
  • Connections (ØC): 3/4″ (35-500L), 1″ (500-900L)
  • Pre Charges: 1.5 Bar (35-50L), 2 Bar (80-150L), 2.5 Bar (200-900L)
Downloads
Technical Datasheet - Zilmet CAL-PRO Expansion Vessel, 4-24 Litre
Technical Datasheet - Zilmet CAL-PRO Expansion Vessel, 35-900 Litre
Product List
CodeCapacity (Litres)Diameter (Ømm)Height (mm)Pmax (Bar)Connection (ØC)
1300000400B4 c/w Bracket22519553/4"
1300000800B8 c/w Bracket22029553/4"
1300001200B12 c/w Bracket29428143/4"
1300001800B18 c/w Bracket29037543/4"
1300002400B24 c/w Bracket32441543/4"
130000350335 c/w Feet40438743/4"
130000500350 c/w Feet40750743/4"
13000080008045060863/4"
130001050010550066563/4"
130001500015050089763/4"
130002000020060081263/4"
130002500025063095763/4"
1300030000300630110563/4"
1300040000400630145063/4"
1300050000500750134061"
1300060000600750155561"
1300070000700750175561"
1300080000800750185561"
1300090000900750210561"

Have questions about our products or need advice? Tell us about your project and we will help you choose the right model for the job.

Call us on 01889 272185 or email us at sales@zilmet.co.uk

Other Zilmet Products

Events and Exhibitions
Coming Up

InstallerSHOW 2025

24/06/2025 - 26/06/2025
NEC, Marston Green, Birmingham, B40 1NT
Find out more
Coming Up

UKREiiF Annual 2025

20/05/2025 - 22/05/2025
Royal Armouries Leeds & Leeds Dock, New Dock, Armouries Dr, Leeds, LS10 1LT
Find out more
Expansion Vessels
Heat Exchangers
Sales and Support
Technical Support Hub
Zilmet UK

Zilmet is Europe’s biggest manufacturer of high quality expansion vessels and plate heat exchangers.

© Zilmet UK Limited 2025
Modern Slavery and Human Trafficking Statement
Designed by IDM Design