| 摘要 |
<p>A control valve (10) including a housing (16), a pair of end caps (12, 14) sealingly attached to the housing (16), each the end cap (12, 14) being formed with a bore (20) for flow of a fluid therethrough, a shaft (26) fixedly attached to the end caps (12, 14) and which passes through the housing (16), a piston housing (40) disposed in the housing (16) and secured between the end caps (12, 14), the piston housing (40) being formed with a plurality of circumferentially spaced apertures (42) for flow of a fluid therethrough, a valve seat (48) sealingly secured to one of the end caps (12), and a piston (60) sealingly disposed in the piston housing (40), arranged to slide along the shaft (26) and selectively sealingly abut against the valve seat (48), wherein when the piston (60) does not sealingly abut against the valve seat (48), a fluid can flow through the bore (20) of one of the end caps (12), past the apertures (42) of the piston housing (40), between the piston housing (40) and the housing (16) and out through the bore (20) of the other end cap (14).</p> |
