FULLY-DRAINING DIAPHRAGM PUMP AND CHECK VALVE ASSEMBLY

摘要

A fully-draining check valve with a mushroom assembly having a tapered back edge and a drain line disposed with the lower rim of the drain line below the tapered back edge to ensure no fluid becomes trapped in the check valve when not in use. Additionally, a fully-draining diaphragm pump is disclosed having a drain line configured to drain the lowest point of a product chamber to ensure no fluid becomes trapped in the diaphragm pump when not in use. A method of cleaning a fully-draining diaphragm pump and fully-draining check valve assembly is further disclosed comprising inducing turbulent flow of water, wash solution, and/or sanitizer through the assembly and opening ball valves the drain lines of the fully-draining check valves to vent the assembly.

主权项

1. A fully-draining diaphragm pump and check valve system, comprising:
a sealed diaphragm pump having a first product chamber on a first side of the pump and a second product chamber on a second side of the pump, which takes suction from a suction manifold and discharges to a discharge manifold; a first check valve disposed between the suction manifold and first product chamber; a second check valve disposed between the suction manifold and the second product chamber; a third check valve disposed between the first product chamber and the discharge manifold; a fourth check valve disposed between the second product chamber and the discharge manifold, wherein each of the first, second, third, and fourth check valves comprises a mushroom assembly having a stem and valve disc, the valve disc having a tapered back edge and each of the first, second, third, and fourth check valves having a drain line disposed with a lower rim of the drain line below the tapered back edge of the respective valve disc.