Clutch The KTM 250 EXC-F employs the KTM-developed DDS clutch (damped diaphragm steel) with a wear-free steel basket and extremely heat resistant clutch plates and new, nitrated steel liners. This clever design employs a diaphragm spring instead of the usual coil springs, making for considerably easier clutch action.
The difference between active and passive solar water heating systems is that active systems have circulating pumps and controls, while passive systems do not. Although passive systems are usually not as expensive as active systems and can last longer, they are generally less eficient.
This feature is not available right now. Please try again later. How solar hot water works-Animation of residential solar thermal system, when sun is out, fluid passes through solar-heated collectors on your home's roof, which in turn pass through a heat exchanger in your basement, giving you hot water. Electric or oil heat is used as backup when the sun is not enough. 1  Howto & Style.