Abstract: A guide protrusion arranged on a bonnet body of a diaphragm valve bonnet can guide movement of a diaphragm during opening or resetting. A straight through diaphragm valve includes the diaphragm valve bonnet. A fluid control system includes the straight through diaphragm valve. Connecting a control cavity of the fluid control system to a second external pipeline forms a fluid channel at a bonnet end; connecting a fluid cavity thereof to a first external pipeline forms a fluid channel at a valve body end. By regulating pressures of the fluids in the fluid channel at the bonnet end and the fluid channel in the valve body end, the diaphragm can move in the direction close to the bonnet along the guide protrusion to open the fluid cavity, or the diaphragm can reset in the direction far away from the bonnet along the guide protrusion to seal the fluid cavity.

Abstract: A guide protrusion arranged on a bonnet body of a diaphragm valve bonnet, can guide movement of a diaphragm during opening or resetting. A straight through diaphragm valve includes the diaphragm valve bonnet. A fluid control system includes the straight through diaphragm valve. Connecting a control cavity of the fluid control system to a second external pipeline forms a fluid channel at a bonnet end; connecting a fluid cavity thereof to a first external pipeline forms a fluid channel at a valve body end. By regulating pressures of the fluids in the fluid channel at the bonnet end and the fluid channel in the valve body end, the diaphragm can move in the direction close to the bonnet along the guide protrusion to open the fluid cavity, or the diaphragm can reset in the direction far away from the bonnet along the guide protrusion to seal the fluid cavity.

Abstract: A main valve for a straightway deluge valve includes a valve body (1), a valve cover (2), a diaphragm (3), a drawing piston (4), a diaphragm pressure plate (5), a drawing link (6), a valve body link (7), a valve plate link (8), a rotatable lip and a mounting hole cover (13). A piston guide is provided at a side part of the valve body (1). The drawing piston (4) is provided slidably in the piston guide along a left-right direction. When the drawing piston (4) slides along the piston guide, the rotatable lip can contact with or separate from the inner sealing end surface. The main valve for drawing the straightway deluge valve, after the valve plate (9) is opened, enables the flow passage to be close to a straightway passage, thereby reducing flow loss.

Abstract: A main valve for a straightway deluge valve includes a valve body (1), a valve cover (2), a diaphragm (3), a drawing piston (4), a diaphragm pressure plate (5), a drawing link (6), a valve body link (7), a valve plate link (8), a rotatable lip and a mounting hole cover (13). A piston guide is provided at a side part of the valve body (1). The drawing piston (4) is provided slidably in the piston guide along a left-right direction. When the drawing piston (4) slides along the piston guide, the rotatable lip can contact with or separate from the inner sealing end surface. The main valve for drawing the straightway deluge valve, after the valve plate (9) is opened, enables the flow passage to be close to a straightway passage, thereby reducing flow loss.