BNSV Hydraulic butterfly valve for water turbine inlet
Overview
Hydraulic inlet butterfly valve of hydraulic turbine is the most widely used inlet valve of hydraulic turbine, which is applicable to the penstock in front of the turbine. There are two types of butterfly valve: vertical shaft (valve shaft position is vertical) and horizontal shaft (valve shaft position is horizontal). Sediment is easy to deposit at the lower bearing of vertical shaft butterfly valve, which should be cleaned regularly, otherwise the lower bearing will wear quickly and cause valve sinking. Therefore, horizontal shaft butterfly valve is generally preferred.
Hydraulic inlet butterfly valve of hydraulic turbine is the most widely used inlet valve of hydraulic turbine, which is applicable to the penstock in front of the turbine. There are two types of butterfly valve: vertical shaft (valve shaft position is vertical) and horizontal shaft (valve shaft position is horizontal). Sediment is easy to deposit at the lower bearing of vertical shaft butterfly valve, which should be cleaned regularly, otherwise the lower bearing will wear quickly and cause valve sinking. Therefore, horizontal shaft butterfly valve is generally preferred.
Name | Valve body and disc | Valve stem | Body seal ring | Disc seal ring |
Inlet hydraulic butterfly valve | Carbon steel | Carbon steel + stainless steel/Stainless steel | Stainless steel | Rubber / stainless steel |
Inlet hydraulic butterfly valve bypass valve | Carbon steel /cast iron | Stainless steel | Stainless steel | Rubber / stainless steel |
Inlet hydraulic butterfly valve bypass valve | Expansion seat | Expansion pipe | Seal ring | |
Carbon steel | Carbon steel | Rubber | ||
Expansion joint | Carbon steel /cast iron | Carbon steel /cast iron | Rubber | |
Upstream and downstream connecting pipe | Carbon steel+low alloy structural steel | |||
Note: The material of main parts and components of valve can be designed and selected according to actual working conditions or special requirements of users.
It can be designed separately according to the special requirements of users, so as to meet the needs of users.