■ structural characteristics and functions of the

 1. Imports and exports two-way closed, the lower spring seat to be tight and force make the ball valve seats to form a two-way sealed. Did not limit the direction of the valve installation.

 2. Cavity in automatically when the pressure relief valve in the cavity unusual step, the valve seat chamber in the spring by high-pressure media compression automatically relief. 3. Emission features due to a two-way valves, valve seats to form the lower reaches of the two-way sealed, so that when the valve is in full-or state-wide clearance, the seat of the two fluids will be blocked; work in this case can be discharged in the cavity Ji Zhi fluid or dirt, or the replacement of the Department of the stem packing with O-ring. Reduce the dirt on the valve sealing surface damage, to extend the service life of valves.

 4. Necking or the entire track of the user based on the actual condition of the track, or choose full-necking in the form of the channel. Drive all-valve path of the ball valve body with the same channel, the flow capacity, ease of cleaning pipelines; necking valve path of the ball valve than a narrow channel in the flow to meet the requirements of economic conditions more.

 5. Auxiliary devices fat injection and valve seat filler stem letter site has assisted resin injection device, when the stem or valve seat filler seal damage to the system, can be injected into the valve seal fat fat sealed for the time being play a supporting role To prevent media leaks.