Electric Immersion Heaters for Steel, Plastic / GRP Main Storage Tanks
Suitable for Fuel Oils or Water / Chemical Solutions

G Series - 2" BSP Q Series - 2.1/2" BSP H Series - Flanged PN6	SH Series - Flanged BS4504 PN16
Single Tube Type, Mild or Stainless Steel	Single Tube Type, Mild or Stainless Steel
List Number Rating kW Length Immersed Inactive Length G/Q/H 1 1 500 mm 50 mm G/Q/H 2 2 750 mm 50 mm G/Q/H 3 3 1,000 mm 50 mm G/Q/H 4 4 1,250 mm 50 mm G/Q/H 5 5 1,500 mm 100 mm G/Q/H 6 6 1,750 mm 100 mm G/Q/H 7 7 2,000 mm 100 mm G/Q/H 8 8 2,250 mm 100 mm G/Q/H 9 9 2,500 mm 100 mm	List Number Rating kW Length Immersed Min. Tank Bore Reqd. SH 1 1 1000 mm 75 mm SH 2 2 1000 mm 75 mm SH 3 3 1000 mm 100 mm SH 4 4 1500 mm 100 mm SH 5 5 1500 mm 100 mm SH 6 6 1500 mm 100 mm SH 7 7 2000 mm 100 mm SH 8 8 2000 mm 100 mm SH 9 9 2500 mm 100 mm
The heaters shown are for fitting to a tank where thermostatic control is provided separately. No provision is made on the heaters themselves. General uses include : Small storage tanks for oil or water Low cost installations Note : Where the tank contains oil or oil-related fluids you MUST provide a Safety Thermostat.	The heaters shown have One Thermostat incorporated for Control function. General uses include : Large storage tanks where temperature is controlled in a sector fashion. Small storage tanks where non-oil fluids are used.
All units have a Watts Rating appropriate to the fluid type used , which is between 6 and 8 W/sq.in. ( 0.9 and 1.2 W/sq.cm.) for oil, and up to 20 W/sq.in. (3.1 W/sq.cm.) for aqueous fluids such as Hard Water.
1 kilowatt will raise 6 gallons (27 litres) of OIL through 100 F (55 C) per hour or pro rata	1.75 kilowatt will raise 6 gallons (27 litres) of WATER through 100 F (55 C) per hour or pro rata
Standard Equipment : Removable Core type Heating Element Weathertight Terminal Cover arrangement Cable entry to suit Inactive (Dead) Portion on Heating Element to suit application	Standard Equipment : Removable Core type Heating Element Controlling Thermostat as appropriate Weathertight terminal cover arrangement Cable Entry to suit Inactive (Dead) Portion on the Heating Element to suit application
'G' Series : 2" BSP Tank Fitting 16 swg element sheath. Hex head 3.1/8" A/F	'SH' Series : BS4504 PN16 (or PN 6) Tank Fitting Heavy wall element sheath Extended Surface arrangement if required
'Q' Series : 2.5" BSP Tank Fitting Heavy wall element sheath. Hex head 3.3/8" A/F
'H' Series : BS4504 PN6 Flange fitting Heavy wall element sheath.
Extra Items are : Delivery UK - usually a nominal charge only.	Extra Items : Delivery UK - usually a nominal charge only. Change of Flange specification.

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Z Series - Flanged BS4504 PN16	X Series - Flanged BS4504 PN16
Single Tube Type, Mild or Stainless Steel	Multi Tube Type, Mild or Stainless Steel
List Number Rating kW Length Immersed Min. Tank Bore Reqd. Z1 1 1000mm 150mm Z2 2 1000mm 150mm Z3 3 1000mm 150mm Z4 4 1500mm 150mm Z5 5 1500mm 150mm Z6 6 1500mm 150mm Z7 7 2000mm 150mm Z8 8 2000mm 150mm Z9 9 2500mm 150mm	List Number Rating kW Length Immersed Min. Tank Bore Reqd. X1 6 800mm 150mm X2 8 900mm 150mm X3 12 1500mm 150mm X4 15 2000mm 150mm X5 18 2500mm 150mm X6 24 2500mm 250mm X7 30 2000mm 250mm X8 36 2500mm 250mm X9 42 2000mm 350mm
The heaters shown have Two Thermostats incorporated for Control and Safety function. General uses include : Large storage tanks where temperature is controlled in a sector fashion. Small storage tanks where non-oil fluids are used. Chemical storage tanks, especially with ratings under 3 kW, where the heater can be controlled directly by the integral thermostats.	The heaters shown have Two or more Thermostats incorporated for Control and Safety function. General uses include : Large storage tanks where temperature is controlled in a sector fashion. Small storage tanks where non-oil fluids are used. Chemical storage tanks, especially with ratings under 3 kW, where the heater can be controlled directly by the integral thermostats.
Standard Equipment : Removable Core type Heating Element Controlling Thermostat as appropriate Safety (Master) Thermostat as appropriate Weathertight terminal cover arrangement Cable Entry to suit Inactive (Dead) Portion on the Heating Element to suit application	Standard Equipment : Removable Core type Heating Element Controlling Thermostat(s) as appropriate Safety (Master) Thermostat as appropriate Weathertight terminal cover arrangement Cable Entries to suit Inactive (Dead) Portion on the Heating Elements to suit application
'Z' Series : BS4504 PN16 (or PN 6) Tank Fitting Heavy wall element sheath Extended Surface arrangement if required	'X' Series : BS4504 PN16 Tank Fitting Heavy wall element sheaths Extended Surface arrangement if required
Extra Items : Fluid Level Switch - this is a very specialised item - please ask for details. Delivery UK - although this is usually a nominal charge only. Change of Flange specification.	Extra Items : Multiple Stage wiring arrangements Delivery UK - although this is usually a nominal charge only. Change of Flange specification.

The heaters shown are all for horizontal fitting. Special arrangements can be made to enable vertical fitting, but advice on this matter must be given prior to manufacture. In all cases the overall length of the heater is the Immersed Length plus 100 mm (4") approx. Inactive (Dead) Length, as shown, may be varied to suit the particular application with a suitable adjustment made to the heater output if necessary. This would apply to a heavily insulated tank, for instance, where the head of the heater could be as much as 150mm from the tank wall. Notes : For Heaters above 1500mm long, it is recommended that supports be used in the tank, otherwise flange fixing should be used. It is very important also that you read and understand our discussion on BS799 - to be found in a separate publication. Click this link HERE

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Brief installation instructions :

All heaters discussed in this web-catalogue are for HORIZONTAL Installation. If you wish to have a VERTICALLY Installed heater, let us know and we will make one to suit. It is important to note that there are differences between the two types such that a Vertical unit can be used as Horizontal, but not the other way about. For further information, phone us. +44 (0)141 440 5775 Some Basic Points : a) Where Oil is mentioned, in general the same technical specification applies to water or any other fluid. Materials used in construction, and calculation methods for heat output requirements differ. b) The Oil Draw Off from the tank should always be ABOVE the level of the heater element(s) and thermostat(s) to prevent these becoming uncovered. c) Heaters are normally installed at the Oil Draw Off end of the tank unless required to give background heating at the opposite end of a long tank which may contain - say - Bitumen. d) In long tanks, heaters may be fitted at both ends to maintain the contents at a more even temperature than might be the case with heaters only fitted in one end. e) With LONG Immersion heaters of the Screw-in type (G & Q types and older versions) it is sometimes difficult to engage the heater in the screwed boss in the tank due to the weight of the overhang, unless the heater is supported from inside the tank. With Flanged heaters (H / SH / Z etc.) the problem is mainly overcome due to the greater load bearing area afforded by a flange fixing. However, it is important that these are installed in the correct orientation so it's better to support the heater regardless. f) In the past we have supplied Screw-in heaters with thermostats incorporated. For oil use we only supply these to special order as the design makes it difficult to locate the thermostats above the heating element. g) Where Thermostats are called for to be integral with the heater we ONLY supply BOTH CONTROL and SAFETY (Manual Hand-Reset) types with the unit. In the case of the 'Z' type the two are accomodated within the heater terminal chamber. For the SH type we supply the Control in the terminal chamber and the Safety as a separate (pocketed and weathertight) item. In the case of the 'H' flanged heater both thermostats are supplied with pockets and weathertight covers, as there is no thermostat fitted on the flange.

ESU Type Heater Illustrated, showing removable core type heating element