초록 ▼

A valve assembly is disclosed. The valve assembly includes a valve body having an inlet opening, an outlet opening, and a flow passage extending therebetween. A check valve is disposed within the flow passage. A shutoff valve is disposed within the flow passage. A venturi is disposed within the flo

A valve assembly is disclosed. The valve assembly includes a valve body having an inlet opening, an outlet opening, and a flow passage extending therebetween. A check valve is disposed within the flow passage. A shutoff valve is disposed within the flow passage. A venturi is disposed within the flow passage between the check valve and the shutoff valve. A fluid system into which the valve assembly is installed is also disclosed.

대표청구항 ▼

What is claimed is: 1. A valve assembly comprising: a valve body having an inlet opening, an outlet opening, and a flow passage extending therebetween; a check valve disposed within the flow passage; a shutoff valve disposed within the flow passage; and a venturi disposed within the flow passage be

What is claimed is: 1. A valve assembly comprising: a valve body having an inlet opening, an outlet opening, and a flow passage extending therebetween; a check valve disposed within the flow passage; a shutoff valve disposed within the flow passage; and a venturi disposed within the flow passage between the check valve and the shutoff valve, wherein the check valve, the shutoff valve, and the venturi are all disposed coaxially relative to each other along the flow passage. 2. The valve assembly according to claim 1, wherein the check valve is located adjacent the inlet opening. 3. The valve assembly according to claim 2, wherein the shutoff valve is disposed adjacent the outlet opening. 4. The valve assembly according to claim 1, further comprising a plurality of ports communicating with the throat of the venturi for connection to hydronic accessories. 5. The valve assembly according to claim 1, wherein the shutoff valve can be positioned between an open position and a closed position to throttle flow through the flow passage. 6. The valve assembly according to claim 1, wherein the check valve comprises a spring-loaded check valve. 7. The valve assembly according to claim 4, wherein the venturi comprises a flow measuring device. 8. The valve assembly according to claim 1, wherein the venturi is located adjacent the downstream side of the check valve. 9. The valve assembly according to claim 8, wherein the shutoff valve is located adjacent the downstream side of the venturi. 10. The valve assembly according to claim 4, wherein the hydronic accessories comprise pressure gauges. 11. A valve assembly comprising: a valve body having an inlet opening, an outlet opening, and a flow passage extending therebetween; a valve carried by the valve body, wherein the valve is located in the flow passage to allow or prevent fluid flow through the fluid passage; a venturi formed in the flow passage, the venturi having a throat with a plurality of ports located therein for connection to hydronic accessories; and a plurality of ports communicating with the venturi. 12. The valve assembly according to claim 11, wherein the venturi forms part of a flow measuring device. 13. The valve assembly according to claim 11, wherein the valve comprises a check valve located in the flow passage and operative to prevent fluid flow from the outlet port to the inlet port. 14. The valve assembly according to claim 13, wherein the check valve is adjacent the inlet opening. 15. The valve assembly according to claim 13, wherein the check valve comprises a spring loaded check valve. 16. The valve assembly according to claim 11 wherein the venturi is located downstream of the valve. 17. The valve assembly according to claim 11, wherein the hydronic accessories comprise pressure gauges. 18. A valve assembly comprising: a first valve body portion having a first flow passage extending therethrough; a second valve body portion having a second flow passage extending therethrough; a check valve disposed in the first flow passage; a venturi disposed in the first flow passage; and a shutoff valve disposed in the second flow passage, wherein the check valve, the shutoff valve, and the venturi are all disposed coaxially relative to each other. 19. The valve assembly according to claim 18, wherein the first portion is releasably coupled to the second portion. 20. The valve assembly according to claim 19, wherein the first portion is fixedly connectable to the second portion. 21. The valve assembly according to claim 18, wherein the throat of the venturi comprises a plurality of ports communicating with the venturi for connection to hydronic accessories. 22. The valve assembly according to claim 18, wherein the shutoff valve can be positioned between an open position and a closed position to throttle flow through the second flow passage. 23. The valve assembly according to claim 18, wherein the check valve comprises a spring-loaded check valve. 24. The valve assembly according to claim 18, wherein the venturi comprises a flow measuring device. 25. The valve assembly according to claim 21, wherein the hydronic accessories comprise pressure gauges. 26. A fluid system comprising: a pump having a suction end and a discharge end; a piping system having a first end connected to the discharge end of the pump and a second end connected to the suction end of the pump; and a valve assembly inserted in the piping system between the first end and the second end, wherein the valve assembly comprises: a valve body having an inlet opening, an outlet opening, and a flow passage extending therebetween; a check valve disposed within the flow passage; a shutoff valve disposed within the flow passage; and a venturi disposed within the flow passage between the check valve and the shutoff valve, the throat of the venturi including a plurality of ports for connection to hydronic accessories, wherein the check valve, the shutoff valve, and the venturi are all disposed coaxially relative to each other along the flow passage. 27. The fluid system according to claim 26, wherein the check valve restricts fluid flow from the outlet opening to the inlet opening. 28. The fluid system according to claim 26, further comprising an operative device inserted in the piping system. 29. The fluid system according to claim 28, further comprising a second valve assembly, wherein the operative device is disposed between the valve assembly and the second valve assembly. 30. The fluid system according to claim 26, wherein the hydronic accessories comprise pressure gauges.