On the basis of the existing research, there are still many works to be further improved and upgraded. In particular, further research can be carried out from the following aspects:
(1) Design different gating system of valve body, and determine the optimal gating system of valve body through simulation calculation, so as to reduce the casting defects of valve body in theas much as possible.
(2) For multi way valve, because of the small transition fillet, the weakest position of the valve body is located at the inlet of the middle oil passage of the bucket joint of the valve body, so the bearing capacity of the valve body is improved by improving the structure of the part of the valve body.
(3) The numerical relationship between the strength of ideal valve body and the strength of valve body with casting defect is studied.