Plate Heat Exchanger comprises a pack of spaced corrugated plates arranged such that the two heat exchanging fluids flow through alternate spaces in the pack. The corrugations maintain the gap between adjacent plates which are sealed against each other. These are nowadays several different technologies to effect a seal between the plates and to maintain the pack in a compressed state. Grano-heat is a professional plate heat exchanger supplier, which is located in Beijing and supply their products worldwide.