Air admittance and check valve

1. An apparatus to allow or stop a flow into a piping system or an enclosed environment, comprising:

(a) a housing having an upper flow passage and a lower flow passage;

(b) a valve seat, wherein said valve seat is between said upper flow passage and said lower flow passage, wherein at least one opening is formed on said valve seat, and wherein said at least one opening has an inner diameter;

(c) at least one rotary valve inside said housing, wherein each of said at least one rotary valve further comprises a main body and two guides mounted to said main body opposite to each other, wherein said at least one rotary valve has a predetermined weight, wherein said main body of said at least one rotary valve is dimensioned to be between said inner diameter of said at least one opening of said valve seat and said inner diameter of said upper flow passage, wherein said rotary valve can rotate axially relative to said guides when said flow from said lower flow passage flows through the housing, and wherein said at least one rotary valve can move inside said upper flow passage and above said valve seat; and

(d) at least two guide rails inside the upper flow passage for guiding each of said at least one rotary valve between an open position and a closed position, wherein said each of two guides of said at least one rotary valve are disposed in each of said two guide rails, and wherein said two guides move freely up and down in said two guide rails.

2. The apparatus of claim 1 , wherein an upper flow passage pressure exists in said upper flow passage, wherein a lower flow passage pressure exists in said lower flow passage, wherein said at least one rotary valve is in said open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said main body of said at least one rotary valve is undisposed from said at least one opening formed on said valve seat when said at least one rotary valve is in said open position, wherein said flow can pass through said at least one opening of said valve seat when rotary valve is in said open position, wherein said at least one rotary valve is in said closed position when said lower flow passage pressure is less than or equal to said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said main body of said at least one rotary valve is disposed on said at least one opening formed on said valve seat when said at least one rotary valve is in closed position, and wherein said flow cannot pass through said opening of said valve seat when said at least one rotary valve is in said closed position.

3. The apparatus of claim 1 , further comprising at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers mounted to said main body of said at least one rotary valve, wherein said plurality of impellers are arranged in a circle around each of said at least two guides, wherein each of said at least two turbulators are opposite to each other, and wherein said at least two turbulators rotate said at least one rotary valve when said flow from said lower flow passage pushes said plurality of impellers.

4. The apparatus of claim 1 , further comprising at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers radially mounted to each of said guides, and wherein said at least two turbulators rotate said at least one rotary valve when said flow from said lower flow passage pushes said plurality of impellers.

5. The apparatus of claim 1 , further comprising an upper flow passage filter located in said upper flow passage and a lower flow passage filter located in said lower flow passage, wherein said upper flow passage filter and said lower flow passage filter have a predetermined sieve sized to prevent a plurality of foreign objects from entering said housing.

6. The apparatus of claim 1 , wherein said apparatus is configured to be inside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said lower flow passage of said apparatus and said second end extends out of said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

7. The apparatus of claim 1 , wherein said apparatus is configured to be outside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said upper flow passage of said apparatus and said second end connected to and communicated with said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

8. The apparatus of claim 1 , wherein said apparatus is installed in a piping system, wherein said piping system has a pipe flow which moves between a lower elevation position of said piping system to an upper elevation position of said piping system, wherein said upper flow passage of said apparatus is communicated with said upper elevation position of said piping system, wherein said lower flow passage is communicated with said lower elevation position of said piping system, wherein said at least one rotary valve is in an open position when said pipe flow moves from said lower elevation position of said piping system toward said upper elevation position of said piping system, and wherein said at least one rotary valve is in said closed position when said pipe flow moves from said upper elevation position of said piping system toward said lower elevation of said piping system.

9. The apparatus of claim 1 , further comprises at least one cage, wherein a plurality of openings is formed on said cage, wherein said cage is mounted on said valve seat, wherein said at least one rotary valve resides in said cage, and wherein said at least one rotary valve can move inside said cage.

10. An apparatus to allow or stop a flow into a piping system or an enclosed environment, comprising:

(a) a housing having an upper flow passage and a lower flow passage;

(b) a valve seat, wherein said valve seat is between said upper flow passage and said lower flow passage, wherein at least one opening is formed on said valve seat, wherein said at least one opening has an inner diameter;

(c) at least one rotary valve inside said housing, wherein said at least one rotary valve further comprises a main body and two guides mounted to said main body opposite to each other, wherein said rotary valve has at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers mounted to said main body of said at least one rotary valve, wherein said at least one rotary valve has a predetermined weight, wherein said main body of said at least one rotary valve is dimensioned to be between said inner diameter of said opening of said valve seat and said inner diameter of said upper flow passage, and wherein said at least one rotary valve can move inside said upper flow passage and said valve seat; and

(d) at least two guide rails inside the upper flow passage for guiding each of said at least one rotary valve between an open position and a closed position, wherein said each of two guides of said at least one rotary valve are disposed in each of said two guide rails, wherein said two guides move freely up and down in said two guide rails, wherein an upper flow passage pressure exists in said upper flow passage, wherein a lower flow passage pressure exists in said lower flow passage, wherein said at least one rotary valve is in said open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said main body of said at least one rotary valve is undisposed from said at least one opening formed on said valve seat when said at least one rotary valve is in said open position, wherein said flow can pass through said at least one opening of said valve seat when rotary valve is in said open position, wherein said at least one rotary valve is in said closed position when said lower flow passage pressure is less than or equal to said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said main body of said at least one rotary valve is disposed on said at least one opening formed on said valve seat when said at least one rotary valve is in closed position, and wherein said flow cannot pass through said opening of said valve seat when said at least one rotary valve is in said closed position.

11. The apparatus of claim 10 , further comprising at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers mounted to said main body of said at least one rotary valve, wherein said plurality of impellers are arranged in a circle around each of said at least two guides, wherein each of said two turbulators are opposite to each other, and wherein said at least two turbulators rotate said at least one rotary valve when said flow from said lower flow passage pushes said plurality of impellers.

12. The apparatus of claim 10 , further comprising at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers radially mounted to each of said guides, and wherein said at least two turbulators rotate said at least one rotary valve when said flow from said lower flow passage pushes said plurality of impellers.

13. The apparatus of claim 10 , wherein said apparatus is configured to be inside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said lower flow passage of said apparatus and said second end extends out of said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in an closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

14. The apparatus of claim 10 , wherein said apparatus is configured to be outside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said upper flow passage of said apparatus and said second end connected to and communicated with said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

15. The apparatus of claim 10 , wherein said apparatus is installed in a piping system, wherein said piping system has a pipe flow moves between a lower elevation position of said piping system to a upper elevation position of said piping system, wherein said upper flow passage of said apparatus is communicated with said upper elevation position of said piping system, wherein said lower flow passage is communicated with said lower elevation position of said piping system, wherein said at least one rotary valve is in an open position when said pipe flow moves from said lower elevation position of said piping system toward said upper elevation position of said piping system, and wherein said at least one rotary valve is in said closed position when said pipe flow moves from said upper elevation position of said piping system toward said lower elevation of said piping system.

16. An apparatus to allow or stop a flow into a piping system or an enclosed environment, comprising:

(a) a housing having an upper flow passage and a lower flow passage;

(b) a valve seat, wherein said valve seat is between said upper flow passage and said lower flow passage, wherein at least one opening is formed on said valve seat, wherein said at least one opening has an inner diameter;

(c) at least one rotary valve inside said housing, wherein each of said at least one rotary valve further comprises a main body and two guides mounted to said main body opposite to each other, wherein said at least one rotary valve has a predetermined weight, wherein said main body of said at least one rotary valve is dimensioned to be between said inner diameter of said opening of said valve seat and said inner diameter of said upper flow passage, and wherein said at least one rotary valve can move inside said upper flow passage and above said valve seat;

(d) at least two guide rails inside the upper flow passage for guiding each of said at least one rotary valve between an open position and a closed position, wherein said each of two guides of said at least one rotary valve are disposed in each of said two guide rails, and wherein said two guides move freely up and down in said two guide rails;

(e) an upper flow passage filter;

(f) a lower flow passage filter, wherein said upper flow passage filter and said lower flow passage filter have a predetermined sieve sized to prevent a plurality, of foreign objects from entering said housing;

(g) at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers radially mounted to each of said guides, and wherein said at least two turbulators rotate said at least one rotary valve when said flow from said lower flow passage pushes said plurality of impellers, wherein an upper flow passage pressure exists in said upper flow passage, wherein a lower flow passage pressure exists in said lower flow passage, wherein said at least one rotary valve is in a closed position when said at least one rotary valve rests on said valve seat to seal said at least one opening of said valve seat, wherein said at least one rotary valve is in said open position when said at least one rotary valve moves away from said valve seat to unseal said at least one opening of said valve seat, wherein said at least one rotary valve is in said open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said at least one rotary valve is in said closed position when said lower flow passage pressure is less than or equal to said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said flow cannot pass through said at least one opening of said valve seat when said at least one rotary valve is in said closed position, and wherein said flow can pass through said at least one opening of said valve seat when rotary valve is in said open position.

17. The apparatus of claim 16 , wherein said apparatus is configured to be inside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said lower flow passage of said apparatus and said second end extends out of said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

18. The apparatus of claim 16 , wherein said apparatus is configured to be outside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit,

wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said upper flow passage of said apparatus and said second end connected to and communicated with said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

19. The apparatus of claim 16 , wherein said apparatus is installed in a piping system, wherein said piping system has a pipe flow and moves between a lower elevation position of said piping system to an upper elevation position of said piping system, wherein said upper flow passage of said apparatus is communicated with said upper elevation position of said piping system, wherein said lower flow passage is communicated with said lower elevation position of said piping system, wherein said at least one rotary valve is in an open position when said pipe flow moves from said lower elevation position of said piping system toward said upper elevation position of said piping system, and wherein said at least one rotary valve is in said closed position when said pipe flow moves from said upper elevation position of said piping system toward said lower elevation of said piping system.

20. An apparatus to allow or stop a flow into a piping system or an enclosed environment, comprising:

(a) a housing having an upper flow passage and a lower flow passage;

(b) a valve seat, wherein said valve seat is between said upper flow passage and said lower flow passage, wherein at least one opening is formed on said valve seat, wherein said at least one opening has an inner diameter;

(c) at least one rotary valve inside said housing, wherein each of said at least one rotary valve further comprises a main body and two guides mounted to said main body opposite to each other, wherein said at least one rotary valve has a predetermined weight, wherein said main body of said at least one rotary valve is dimensioned to be between said inner diameter of said opening of said valve seat and said inner diameter of said upper flow passage, and wherein said at least one rotary valve can move inside said upper flow passage and above said valve seat;

(d) at least two guide rails inside the upper flow passage for guiding each of said at least one rotary valve between an open position and a closed position, wherein said each of two guides of said at least one rotary valve are disposed in each of said two guide rails, and wherein said two guides move freely up and down in said two guide rails;

(e) an upper flow passage filter;

(f) a lower flow passage filter, wherein said upper flow passage filter and said lower flow passage filter have a predetermined sieve sized to prevent a plurality of foreign objects from entering said housing;

(g) at least two turbulators, wherein each of said at least two turbulators comprises a plurality of impellers mounted to said main body of said at least one rotary valve, wherein said plurality of impellers are arranged in a circle around each of said at least two guides, wherein each of said at least two turbulators are opposite to each other, wherein said at least two turbulators rotate said at least one rotary valve when said flow from said lower flow passage pushes said plurality of impellers, wherein an upper flow passage pressure exists in said upper flow passage, wherein a lower flow passage pressure exists in said lower flow passage, wherein said at least one rotary valve is in a closed position when said at least one rotary valve rests on said valve seat to seal said at least one opening of said valve seat, wherein said at least one rotary valve is in said open position when said at least one rotary valve moves away from said valve seat to unseal said at least one opening of said valve seat, wherein said at least one rotary valve is in said open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said at least one rotary valve is in said closed position when said lower flow passage pressure is less than or equal to said predetermined weight of said at least one rotary valve and said upper flow passage pressure, wherein said flow cannot pass through said at least one opening of said valve seat when said at least one rotary valve is in said closed position, and wherein said flow can pass through said at least one opening of said valve seat when rotary valve is in said open position.

21. The apparatus of claim 20 , wherein said apparatus is configured to be inside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said lower flow passage of said apparatus and said second end extends out of said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

22. The apparatus of claim 20 , wherein said apparatus is configured to be outside said enclosed environment,

wherein said enclosed environment has an ambient pressure in said enclosed environment, wherein said enclosed environment further comprises at least one conduit, wherein each said at least one conduit has a first end and a second end, wherein each of said at least one conduit has said first end connected to said upper flow passage of said apparatus and said second end connected to and communicated with said enclosed environment, wherein said upper flow passage pressure is adopted to said ambient pressure of said enclosed environment, wherein said at least one rotary valve is in an open position when said lower flow passage pressure is greater than said predetermined weight of said at least one rotary valve and said upper flow passage pressure, and wherein said at least one rotary valve is in a closed position when said lower flow passage pressure is equal to or less than said predetermined weight of said at least one rotary valve and said upper flow passage pressure.

23. The apparatus of claim 20 , wherein said apparatus is installed in a piping system, wherein said piping system has a pipe flow moves between a lower elevation position of said piping system to a upper elevation position of said piping system, wherein said upper flow passage of said apparatus is communicated with said upper elevation position of said piping system, wherein said lower flow passage is communicated with said lower elevation position of said piping system, wherein said at least one rotary valve is in an open position when said pipe flow moves from said lower elevation position of said piping system toward said upper elevation position of said piping system, and wherein said at least one rotary valve is in said closed position when said pipe flow moves from said upper elevation position of said piping system toward said lower elevation of said piping system.