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2. Zone valve - Wikipedia

   en.wikipedia.org/wiki/Zone_valve

   Lower total cost of ownership when zone valve failure and repair costs are taken into account. More robust and reliable system. Simple mechanical and control design ("SPST thermostats") Redundancy: If one zone pump fails, the others can remain working; Far superior method of linking multiple heat sources. Such as gas and solid fuel in one system.

3. Solenoid valve - Wikipedia

   en.wikipedia.org/wiki/Solenoid_valve

   A solenoid valve is an electromechanically operated valve. Solenoid valves differ in the characteristics of the electric current they use, the strength of the magnetic field they generate, the mechanism they use to regulate the fluid , and the type and characteristics of fluid they control.

4. Air shower (room) - Wikipedia

   en.wikipedia.org/wiki/Air_shower_(room)

   HEPA filtration within the air shower is capable of removing 99.97% of particles greater than 0.3 μm diameter. [5] Air is channeled within the air shower using a closed-loop system, where it is continuously re-circulated. Air is forced through a motorized filter/blower module into a large plenum, then into the

5. Solenoid (engineering) - Wikipedia

   en.wikipedia.org/wiki/Solenoid_(engineering)

   The solenoid can be useful for positioning, stopping mid-stroke, or for low velocity actuation; especially in a closed loop control system. A uni-directional solenoid would actuate against an opposing force or a dual solenoid system would be self cycling. The proportional concept is more fully described in SAE publication 860759 (1986).

6. Reversing valve - Wikipedia

   en.wikipedia.org/wiki/Reversing_valve

   A reversing valve removed from an HVAC heat pump for replacement. A reversing valve is a type of valve and is a component in a heat pump, that changes the direction of refrigerant flow. By reversing the flow of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa. This allows a residence or facility to ...

7. Solenoid - Wikipedia

   en.wikipedia.org/wiki/Solenoid

   This equation is valid for a solenoid in free space, which means the permeability of the magnetic path is the same as permeability of free space, μ 0. If the solenoid is immersed in a material with relative permeability μ r, then the field is increased by that amount: =.

8. Starter solenoid - Wikipedia

   en.wikipedia.org/wiki/Starter_solenoid

   The starter motor is a series, compound, or permanent magnet type electric motor with a solenoid and solenoid operated switch mounted on it. When low-current power from the starting battery is applied to the starter solenoid, usually through a key-operated switch, the solenoid closes high-current contacts for the starter motor and it starts to ...

9. Solenoid brake - Wikipedia

   en.wikipedia.org/wiki/Solenoid_brake

   A solenoid brake is an electrically controlled brake. The brake is turned on and off by an electrical solenoid. Typically a spring engages the brake when unpowered, and the solenoid releases it when powered. These are used along with a mechanical brake to manage the load on a cargo winch. They're also used in electric wheel chairs, hoists ...