Hygroseal™ Cartridge Autovents 

HV30C

NLB’s volume valve, fitting 1/2” BSP tappings.

Finishes include Nickel, Chrome and plain Brass.

                                        Panel towel rad                    Panel rad                       Towel rad                          

Micro

The versatile Micro fits 1/8” and 1/4” BSP, and 5mm, 6mm 7mm tappings.       Chrome finish.

Quinn (Barlo) rad                                                      Classic towel rad                 Center rad                         Cast iron rad                   

The stylish and versatile range of Aladdin Hygroseal™ automatic radiator de-aeration valves are a new breed in automatic radiator venting. The innovative Hygroseal™ technology (patent pending) with its long, leak-free life, provides a cost-effective solution to automatic radiator de-aeration.

Saves energy, keeps radiators hot-to-top, reduces corrosion and system noise, provides maintenance free system - dispenses with the need for radiator keys.

• Omni-directional operation for panel and towel type radiators

• Two stylish models for all known radiator tapping sizes

• Automatic safety feature

• Also works on negative pressure systems

• Replaceable cartridge

The valves are fully automatic, requiring no manual adjustment, and will not leak in the unlikely event of failure as a backup failure safety mechanism is incorporated.  Their one–way valve makes them suitable for use with radiators which can cycle into negative pressure, typically loft conversion radiators or on the suction side of the pump.  The innovative Hygroseal™ technology (patent pending) utilises a ‘dual-seal positive valve closure’ which provides  an extended, leak-free life.

Installing the valves is a simple DIY job that doesn’t require system draining. Once the valves are installed the changing of the cartridge is a ‘less than one minute’ operation.

Technical Specification 

Operating Pressure Range                  0-10 bar 

Operating Temp. Range                       up to 120 deg. C

HV30C    Size                                          25.4 mm across flats, 5mm from tapping fitted

                Fitting                                        1” spanner flats

                 Seal                                          EPDM O-ring seal

Micro       Size                                           16 mm diameter, 14 mm from tapping

                 Fitting                                       9/16” spanner flats

                 Seal                                          Compression or fitter-applied threadseal

The speed of vent cycle varies with temperature and pressure; at higher temperatures and pressures the vent cycle is faster.

This table relates to a 1 bar pressure cycle.

1 bar

Vent Time (hrs)

After 5 years the radiator may again collect air in which case the cartridge has failed and requires replacement. 

The valve is guaranteed for 5 years.

The HV30C and Micro valves were tested by BSRIA in Jan/Feb 2009 - see their report 52789/1.