Temperature sensitive valves

Hello,

You need to procure two different items, One is a valve and two is a temperature controller,

You can use a coffee vending machine valve(they are available in 2 and 3 outlets) and use temperature controller to operate the valve,

write in details for more assistance,

You are describing a two position diverting valve. Unless your design is digital, that is a bad choice! Change your design to an analog modulating diverting valve and add a simple PLC controller with PID loop control. This will provide a constant temperature at either port. Valves may be obtained from various sources. I prefer Belimo (www.belimo.com). I exclusively use EZAutomation PLC controllers (www.ezautomation.net). Contact me directly with any additional questions. I can design the system for you.

www.innovativelogicalcontrols.com

thermovalves that opens at preset temperatures are also availabale but one way most probably. It will be cheaper to use a thermostat with a 2-way solenoid valve.

If you send details, can supply you with complete circuit.

Good day

Have you considered trying a temperature controlling shower valve? I think most models will work backwards. I like the idea of a simple mechanical system.

these types of valves are available with Honeywell.

We used them to control water temp. for solar systems.

These are mechancal valves so doesn`t reqd. any power. Just fit set & get the results. For Two way / Three way operations we may be reqd to use combination logis.

sanjay

A suitable valve can be had over-the-counter for less than £40GBP at a number of outlets in the UK, including on-line ons. It is used as a central heating diverter valve. Are 15mm metric copper compression fittings OK?

A couple of thermostats and a source of power complete the job.

Hi Colleagues

I have taken note of what you have all suggested regarding my enquiry on the above.

Let me brief you on the project I wish to embark on:

My objective is to 'conserve water'. Water is very scarce, especially here in South Africa. I have observed and interviewed a number of people checking on normal behaviour of people in my area and I concluded that my observations were common practice.

When people are taking a shower and have a choice to open hot or cold water and they wish to have a hot/warm shower they will open the hot tap first and let the water run until hot water starts coming out then they start mixing it with cold water to cool it to their preferred temperature. This process 'throws away' at least 5 litres of clean water down the drain per person per bathing session. The same happens in the kitchen when washing dishes and when washing clothes. People here will normally take two baths a day and wash dishes three times a day and wash clothes at least twice a week. The population is 48million, made up of approximately 5 million households of 5 people each. At least a third of these live in homes fitted with overhead (roof mounted) geysers with an average pipe length of about 50m of ½'' copper pipe from the geyser to all the hot water outlets.

Now my thinking: A simple and cheap way to save all this pipeline water from being thrown away and reuse it. One option will be to divert the water into a collector tank from which it can then be used for either drinking, washing or garden irrigation. The other option will be to just loop it back into the geyser and recycle it within the same system. This is when I thought of a three way valve for each hot water outlet and to position the valve just before the outlet. Ithen faced the challenge of finding a suitable and cheap way of diverting the cold water in the pipeline each time the tap is turned on. That's when I thought of these temperature sensitive valves.

Looking forward to your valuable assistance.

Bernard