Abstract: A check valve for use in a flow line has a valve body which includes a first portion with an inlet and an outlet, the inlet and outlet being substantially aligned with one another. The valve body further includes a second portion with tubular member having an longitudinal passage for receiving fluid from the inlet passage with outlet ports extending radially from the longitudinal passage and with a flange member extending annularly around tubular member. A plunger is mounted with the valve body for preventing fluid flow through the outlet ports and includes a plug mounted with the tubular member in its longitudinal passage to deflect the flow of fluid through the outlet ports and a tubular sleeve circumscribes the tubular member. The spring is mounted with the valve body for urging the plunger toward the inlet passage. The flow of fluid through the valve is checked when the pressure in the inlet passage is insufficient to overcome the urging of the spring.

Abstract: A check valve used in a fluid flow line is disclosed and includes a body having a first portion defining an inlet passageway, an outlet passageway and a shoulder which directs fluid flow upwardly through an opening into the outlet passageway and a second portion with a tubular section threadably engaged in the opening which receives the flowing fluid in one end for flowing up the tubular section and out outlet ports. A flange extends outwardly from the tubular portion at a location below the outlet ports to define an upwardly facing sealing surface. A plunger member is mounted within the body and includes a plug slideably mounted within the longitudinal passage and a tubular sleeve mounted to circumscribe the tubular section with the sleeve having a shoulder forming a downwardly facing sealing surface which is engageable with the upwardly facing sealing surface on the flange, the sleeve being moved upwardly by the pressure exerted by the fluid on the plug.