Product SP20/20              Take me to the SHOP

SP20/20 Easy Connect Water Circulation Pump £28

UK Shipping £3.95, UK only , not available outside UK

A best selling, economical and well proven pump, ideal for use in solar hot-water systems (and Home Breweries!)

• Half Inch BSP Connections- see video for details
• High temperature capability -40C to +105C
• Food Grade plastic (for brewers), also safe with glycol antifreeze
• Operates on 7 - 14 Volts DC, low wattage *
• Very compact, almost silent in operation
• Efficient:- Uses as little as 6 Watts of power
• Available in choice of three power levels- 6, 8 or 14 watts
• Head of 2 ,3 or 5 metres respectively  *click for explanation
• Flow rate from <1 ltr per minute to 11 ltrs per min according to model and voltage supplied.
• Brushless for longer maintenance-free life
• High Quality Ceramic axis for increased durability
• Rated for continuous use.
• Can operate from Solar Panel (PhotoVoltaic) power *click for more information
• Centrifugal Impeller,
• Design Life 'MTBF' >15000 hrs (over 6.8 yrs @ average 6hrs per day)
        Click HERE to see a Video of the pump
• *Now available in either 24Volts or choice of three 12V power levels if greater flow rate or head is required - Up to 5 metre head from 12V/14Watt version. See shop for choices

  Connection options, including Silicone Pipe available- see below

Product SP199

Product SP200

Product SP202

click HERE to see video illustrating connection methods

Connection Options for SP20/20

SP199- A set of two black connection nuts, pipe inserts and washers to fit 12mm OD silicone pipe

£1.50

or

SP200 - Connection sets as above, plus 2 X100mm lengths 12mm Silicone Tubing (High Temperature)

TIP! Using clear tube allows easy visual check of flow state

£2.45 inc postage if purchased with a pump

or

1/2" BSP Tap Connector (300mm) with built-in Isolating Valve allowing easy pump removal whilst in circuit

£4.95 each

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click to see video illustrating connection methods

SP207 Coloured Silicone Pipe 12mm OD (2.5mm wall) £3 for 1 metre

FoodSafe High Temperature Silicone Rubber Hose, in Blue, Black and Translucent.

£3 per metre.P&P £2.80

This food-quality tube is both strong and flexible, so can be made to stretch over both ports of the SP14/10 pump (Translucent is probably best for this as it is more stretchy). It is also ideal for attaching to the SP20/20 pumps using the black connector nuts shown above (SP199)

The Translucent tube is the home brewers favourite, also 12mm OD but has a larger internal bore of 8mm and 2mm thick walls. This has the joint benefits of reduced flow resistance and visibility to identify air bubbles or dirt. For this reason it is also our favourite for unpressurised solar circulation. It is Platinum Cured non yellowing Silicone,

Cost reductions for longer lengths over 10 mtrs- please email for price.

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Product number .....SP12LCD ...................... Take me to the SHOP

• SP12LCD - Full LCD Display 12 Volt Temperature Differential Controller £69.99
  
  
  

• Visual read-out of Hot Water available now for your shower or bath.
• Shows user exactly what is happening to the solar installation, making commissioning much easier.
• Low Voltage (6 to 14V DC) Solar Water Controller.
• 3 Temperature Probes included, extra length leads available.
• Full LCD display of Temperatures and pumping or dumping status.
• DC Outputs to both Pump and Overheat valve etc.
• Fully user-configurable settings with popular defaults pre-loaded.
• Frost Protection option.
• Very low Power Consumption…<2Watts
• Allows optimisation and identification of installation problems eg Reverse flow / Thermal Circulation/ incorrect flow rate..
• Manual over-ride switching capability.
• Available as an EAST/WEST controller.
• Versatile and highly configurable options
• Live Data can be sent to PC via supplied USB lead
  
  See here for more detail          or         here for a video
  

Product SP100           Take me to the SHOP

SP100 12V Temperature Difference Controller Circuit £42.95

12Volt Programmable controller to switch solar pump in when heat is available in collector.

Huge improvement in solar panel efficiency, ensuring maximum capture of heat while eliminating cooling risk when collector temperature falls below tank temp.

Includes options e.g.Anti frost protection to pulse pump at times of frost risk, or dual panel control. (can be programmed to your needs pre-purchase)

LEDS to indicate power and pumping.

Additional relay available to control over-heat risk.

Includes 2 temperature-probe leads, with 5 metres and 2 metres of cable (for collector and tank)

Additional probes available to manage East West Installations.

Enables download of temperature logging into a PC with serial cable (at additional cost). See screen print below

Requires 8-20V DC supply (available separately)

see video of 12Volt Controller here

click here to download instruction leaflet (freezecheck enabled version)

Screen Print Examples of live data downloaded to a PC using the SP100 12Volt Temperature Differential Controller:

Live data can be uploaded straight in to MS Excel to create dynamically updated graphing or is easily copied and pasted into other programs for analysis if required.

The format, frequency and actual data uploaded can be programmed to your requirement at no extra charge.

In the first example, the chip has been programmed to record the max and min temperatures since the circuit was reset last. Data is sent to a free terminal program on the PC.

In the second photo the Collector and Tank temperatures have been sent to Microsoft Excel over four days and the graphical display updates dynamically as the data is received.

This can be useful when setting a system up where you are unable to monitor the data during the day or are concerned about frost risk at night.

The output can be customised if specific formats or labels are preferred.

12 Volt DC Two Port Motorised Valve £39.95

A two port valve having Half Inch BSP female threads, available in two different wiring options

• Option1 - Two Wire solution.- NORMALLY CLOSED
• 12Volt DC operation at very low current (<3 watts while switching)
• Zero current drain in default state, 0.25 of a watt actuated
• Opens to allow flow when two wires are given 12V feed
• Returns to default position (normally closed) when powered off
• Ideal match to 12V Temp Diff Controller
• Low Voltage for safety. Efficient and economical
• 
  
• Option2 - Three Wire - Can be set to default OPEN or CLOSED
• Blue to Negative, Red to Positive
• Activates when red and yellow wires are joined or broken (i.e. by a switch or relay)
• Designed to be operated by simple switch or relay
• Zero power drain when static
  
  
  Wiring Options Explained
  
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Just click on the link to Take me to the SHOP for online purchasing by Paypal, Credit Card or Cheque payment, or if you prefer please email me with your requirements and I can sort out rapid dispatch.

I am usually on-line so can get straight back to you

Make your own Pump-Switching

Temperature Control Circuit Kit

£POA inc p&p

We sometimes get asked if you can make your own controller. We reckon this circuit is probably the simplest possible control circuit that will work, so if cost, loneliness or enthusiasm drives you towards making your own Temperature Differential Controller, consider this option ;-).

Pack of main components for the production of your own basic Temperature Differential Controller

Click to enlarge diagram

nb This is not the circuit used in the above controllers and is offered as a service to the electronic enthusiast. Whilst it certainly works, performance in my own tests has not been completely satisfactory. It is NOT recommended to people without some prior electronics assembly experience.

The circuit used in the SP100 controller is entirely different and far more technically advanced.