Single Coil Cylinders - for traditional heating systems

An integral part of any open vent or sealed system, Glow-worm cylinders are extremely reliable, hard wearing and come complete with a 25 year warranty against perforation of the steel shell.

They are available in six sizes - 115, 150, 175, 200, 250 and 300 litres and manufactured from high grade stainless steel with laser welded seams.

Our cylinders are built with efficiency and performance in mind, and incorporate excellent insulation that achieves heat loss as low as 1.7kWh/24hrs and a high recovery heating coil that reheats the cylinder in as little as 20 minutes.

Key Features

• Single coil available in115, 150, 175, 200, 250 & 300 litres 
• High grade stainless steel cylinder with laser welded seams
• Insulation meeting CheSS best practice as low as 1.7kWh/24hrs1
• High recovery heating coil –just 20 minutes
• External expansion vessel supplied
• Covered controls and wiring box
• Simple maintenance – no anode required
• High flow rates achievable working at 3.5bar pressure
• 25 year warranty on cylinder shell

Technical Table

Cylinder Size	115	150	175	200	250	300
Dimensions & Weights
Standard capacity litres	115	150	175	200	250	300
Maximum water supply pressure bar	10	10	10	10	10	10
Maximum primary circuit pressure bar	2.5	2.5	2.5	2.5	2.5	2.5
Pressure reducing valve bar	3.5	3.5	3.5	3.5	3.5	3.5
T/P value OC/bar	95/7.0	95/7.1	95/7.2	95/7.3	95/7.4	95/7.5
Net weight (kg)	28	30	33	39	44	49
Weight (full) (kg)	145	175	205	245	310	340
Height (mm)	969	1179	1399	1499	1789	2109
Diameter (mm)	554	554	554	554	554	554
Connections
Cold mains inlet		22mm	compression
DHW Outlet		22mm	compression
Balanced pressure cold water outlet		22mm	compression
Primary flow		22mm	compression	(on 2 port value)
Primary return		22mm	compression
Electrical connections		230/	240V (50Hz)
Coil Specifications
Reheat time min	18	20	18.5	24	28	42
Heat up time min	20	21	24	26	30	35
kW Coil rating	19.3	19.3	22	22	26	26
Heat loss kWh/24hrs	1.7	1.9	2	2.1	2.3	2.5