| 摘要 |
The present invention provides an explosion resistant piston type-high pressure valve providing explosion resistance at low costs by using air pressure as a power source and generates power more than twice than a valve which is in the same size and uses a single actuator. To achieve this, the explosion resistant piston type-high pressure valve comprises: a valve body having a flow path formed thereon; and a drive part moving a piston rod, which is installed on the flow path of the valve body, frontward and backward to open the flow path. The drive part includes a cylinder, a first piston, a second piston, and a shaft. The cylinder has a first chamber and a second chamber inside, wherein the first and second chambers are partitioned by a separation plate. The first piston and the second piston are installed on the first chamber and the second chamber, respectively, and are reciprocally moved frontward and backward in accordance with the pressure of air supplied to the first chamber and the second chamber. The shaft is installed to pass through the first piston and the second piston and is connected to the piston rod through a joint, thereby allowing the piston rod to reciprocally be moved frontward and backward through operations of the first piston and the second piston. |
