Check valve for rod out
OwnerDonald L. Adamsinventor
Life of this patent
Estimating the term…
Abstract
A ball check valve connects to a duct leading from a process pipe to a flow transmitter, pressure gauge or sampling analyzer. A unique check valve is connected to the distal end of the straight-through duct. A cleaning rod impales a packing gland which is connected onto the check valve when cleaning is initiated. The cleaning rod is inserted through the check valve and into the duct to clean debris without the loss of any fluid while maintaining full process pressure.
Claims14
The process involving an opening such as a nozzle with a duct extending to the opening with the duct being closed by a main valve, wherein the improved method comprises:
- a. cleaning debris from the duct and the opening below the main valve by
- b. inserting a rod through a check valve on the distal end of the duct, through the main valve while the main valve is closed and through the duct,
- c. opening and unseating the check valve with said rod,
- d. mounting a packing gland upon said rod, and
- e. attaching said packing gland to the check valve before inserting the rod through the check valve and before unseating the check valve.
In an opening such as a nozzle with a duct extending to the opening with the duct being closed by a main valve the improved structure for cleaning debris from the duct and opening comprising in combination with the above:
- a. a check valve on said duct at the distal end having
- (i) a check valve body with
- (ii) a check fluid chamber aligned with the duct,
- (iii) a check valve seat connecting the check chamber with
- (iv) a distal passageway aligned with the duct,
- (v) a ball in the check chamber, and
- (vi) a helical compression spring in the check chamber biasing the ball against the check valve seat,
- b. a cleaning rod is inserted through the check valve, through the main valve while the main valve is closed and through said duct,
- c. a side bevel on the end of the rod forming means for
- (i) pushing the ball of the check valve to one side and
- (ii) removing debris in the duct below the main valve,
- d. a bleed port in the distal passageway of the check valve.
In an opening such as a nozzle with a duct extending to the opening with the duct being closed by a main valve the improved structure for cleaning debris from the duct and opening comprising in combination with the above:
- a. a check valve on said duct at the distal end having
- (i) a check valve body with
- (ii) a check fluid chamber aligned with the duct,
- (iii) a check valve seat connecting the check chamber with
- (iv) a distal passageway aligned with the duct,
- (v) a ball in the check chamber, and
- (vi) a helical compression spring in the check chamber biasing the ball against the check valve seat,
- b. a cleaning rod is inserted through the check valve, through the main valve while the main valve is closed and through said duct,
- c. a side bevel on the end of the rod forming means for
- (i) pushing the ball of the check valve to one side and
- (ii) removing debris in the duct below the main valve,
- d. the check fluid chamber is sufficiently wide so that the ball may move free of the path of a rod extending through the distal passageway, check seat, check chamber, and duct,
- e. a packing gland connected onto the rod and threaded into the distal passageway of the check valve and having packing to form a seal between the distal passageway and rod.
Dependencies are inferred from the claim text.