| 摘要 |
A valve (10), response to the loss of coolant under pressure for example in a diesel engine, to open and allow fluid flow downstream with a consequent loss in fluid pressure, which is recognised by a pressure sensitive fuel valve supplying fuel flow to the engine. The coolant loss valve (10) includes a three-part housing (11, 12, 14) having the periphery of an elastomeric rolling diaphragm (44) trapped between two housing parts (12, 14) and forming a coolant chamber (45). A spring-loaded piston (50) and a pin (55) assembly tranmits diaphragm movement, the pin (55) forming a valve controlling fluid flow through a die cast aluminium head structure (11) which is the third part of the housing. The pin (55) is a stainless steel pin used for corrosion resistance and is supported for axial movement in a dual quad ring seal (62) and sleeve (60) structure. |
