Shear pump is used to effectively mix and hydrate material added into drilling fluid. With large capacity, high lift, and long reliable service life, the shear pump can speed up dilution and hydration of polymers to have property mud.
See from GN shear pump performance chart, the maximal pressure of shear pump is 47m (H2O), namely 0.47MPa. It means once the output pipe of shear pump has been blocked, the maximal pressure of output pipe is 0.47Mpa, and the maximal pressure of pump case is 0.47Mpa.
1) Figure support of the case of shear pump can endure
Material of the pump case is HT200，height of material is 10~20. Strength σs=145MPa，working strength ［σb］=48.33MPa.
See from above figure, while outlet pipe of shear pump been blocked, the maximal pressure arised from this is 0.47 Mpa. It is greatly less than the working strength of pump casing ［σb］=48.33MPa.
In this regards, it can be concluded that, GNJQB series shear pump is completely safety while output pipe blocked.
2、Figure support of shear pump output pipe pressure
Shear pump output pipe use 20# seamless steel tube. with tube thickness 7~8 mm. Yield strength of the tube is σs=245MPa，working strength ［σb］=81.67MPa.
See from above figure, while outlet pipe of shear pump been blocked, the maximal pressure arised from this is 0.47 Mpa. It is greatly less than the working strength of pump casing ［σb］=81.67MPa.