A solenoid valve (100) for fluid flow control and pressure relief comprising a solenoid assembly (104) and a dual valve assembly (102),
- the solenoid assembly (104) comprising:
- a C-Core (90) having a passing hole (93) at a far end (91) and at a near end (92);
- an armature (107) having a fixation means (118) on an outer surface (147) at its outer end (109), and a room (119) at its inner end (117);
- a plunger (120) with a reduced diameter zone (128), an inner flange (127), an outer flange (126), a first room (124), a second room (125), a plurality of longitudinal recesses (129), a transversal hole (131), a neck (122) and a mating end (121), having a plunger-spring (106), and a sealing seat (309) with a constraining surface (316) and a sealing surface (317);
- a solenoid coil (103);
- and
- a guide (112) having an inner tubular wall (141), an outer tubular wall (142), a flange (143) near an external end (146) of the outer tubular wall (142), a groove (145) on the outer side and a spring rest (144) on the inner side towards the external end (146);
- the dual valve assembly (102) comprising:
- a valve body (300) further comprising one or more inlet ports (301), one or more exhaust ports (304), an outlet port (303), an upper seat (315), and an outlet seat (314);
- an upper stopper ring (113);
- a lower stopper ring (307) having a protruded rim (311) and a third part profile (310);
- and
- a flow arrangement (200) disposed on an inside of the valve body (300);
- the flow arrangement (200) further comprising:
- a primary moving assembly (240) further comprising a primary mover (230) and an O-ring holder (208),
- wherein the primary mover (230) comprising a first bore (209), an exhaust bore (207), a tubular cavity (212), an engaging end (220), an annular groove (210) to hold a sealing O-ring (206), a first part profile (216) and plurality of raised peripheral surfaces (224), and
- wherein the O-ring holder comprising a cavity (218) and a second part profile (217);
- and
- a secondary moving assembly (213) further comprising a sliding member (215), a supporting ring (214), a pressure-relief spring (211) and a pressure-adjusting mechanism (205);
- the guide (112) extends from the solenoid assembly (104) to the dual valve assembly (102), the upper stopper ring (113) sits on the upper seat (315) of the valve body (300) while the lower stopper ring (307) sits on the outlet seat (314) of the valve body (300), constraining the flow arrangement (200) between the upper stopper ring (113) and the lower stopper ring (307) the first part profile (216) of the primary mover (230), the second profile (217) of the O-ring holder (208) and the third part profile (310) of the lower stopper ring (307) along with an inside of the valve body (300) forms a channel (306), the sealing O-ring (206) butts on the protruded rim (311) of the lower stopper ring (307) and forms a sealing point (308), the tubular cavity (212) of the primary mover (230) houses the secondary moving assembly (213), the flow arrangement (200) moves up when the solenoid coil (103) is energized resulting in normal fluid flow, the secondary moving assembly (213) moves down under excessive fluid pressure when the solenoid coil (103) de-energized, through the reduced diameter zone (128) and the transversal hole (131) in the plunger (120), the incoming fluid reaches the first room (124) of the plunger (120) and the incoming fluid pressure acting on the constraining surface (316) of the sealing seat (309) augments the force of a plunger-spring (106) in keeping the inflow orifice (201) sealed by the sealing surface (317) of the sealing seat (309), the incoming fluid also reaches to a top of the plunger (120) and exerts force on the mating end (121) which helps in keeping the inflow orifice (201) sealed by the sealing surface (137) of the sealing seat (309), a disposition means (312) provided on a first end (313) of the valve body (300) to mount the valve body (300) on the external end (146) of the guide (112) to obtain the solenoid valve (100) with integral pressure relief arrangement.