12v Normally Open 2-Way Solenoid Valve 1/4" NPT Brass Body NBR Seals

"These valves are best used with water, oil, air, or even things like antifreeze. We especially like to use these to block or redirect the flow of coolant in our vegetable oil conversions for vehicles. It's great to be able to turn off/on heating to a SVO tank especially when it's warm out and this valve can easily be used with a thermostat to maintain tank or tank heater temperatures as well as fuel lines. Acting Motion Direct Acting Power Consumption: 25 Watts (12v model), 44 watts (110 VAC model) Cv Value: 0.23 Acting Motion: Direct Acting Max Viscosity: 20 CST De-energized State: Normally Open Time to fully switch ~2.0 seconds Connecting Ports: 1/4"" Female NPT Body Type: Brass Coil: Steel Shell Orifice: 2.5 mm Seal Material: NBR Seals Max Temperature: 80° C / 176° F Operating Pressure: 0-70 psi Air/Water 0-40 psi Light Oil Medium Air, Water, Gas, Oil Warranty 6 Months Life Cycle ~100,000 Switches Dimensions of unit (see drawing for reference) Length 40.5 mm Height 110 mm" 12v DC: These valves are built to handle acceptionally high maximum pressures while still maintaining no minimum pressure to open/close. Because of this, the 12v valves require a bit higher than normal amperage to operate. When 12v DC voltage is applied, it should be expected for the valve body to heat up, especially when there is no working fluid passing through them. When voltage is applied continuously for an extended period of time, it is common for the valve body to reach high temperatures ranging from 80°C to 110°C. It is recommended not to touch these valves while in extended operation and to keep them exposed to the air to aid in cooling them. Applying voltage continuously for very long periods of time may shorten the coil's life expectancy.

Norman and Beard organ at St Chad's, Bensham. View of the rear of the console. This load of pipework has lasted since 1915, so a good pneumatic action that works the organ through air pressure has a lot of life in it. The little bellows or "pneumatic motors" made of lambskin that act as valves in the mechanism wear out and have to be replaced over time. Understandably due to the mechanical complexity and resultant expense, electric action is more popular, or fully mechanical tracker action. The other problem of pneumatic action is that it is sluggish in response if extended over too great a distance.

The valve will be connected to a computer as will the peltier devices and a sensor inside the container so that it can be opened/closed to attain the desired humidity and temperature.