Gate valve function only switch gate valve classification

The gate valve in the valve only has the function of the switch, and can be classified according to the driving mode, the sealing original structure and the valve stem structure, such as the manual gate valve, the parallel gate valve, the open gate valve and the like.

The gate valve in the valve, the English name is gate valve, plays a switching role. The opening and closing member of the gate valve is a gate. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully open and fully closed, and cannot be adjusted and throttled. The direction of the gate movement of the gate valve is perpendicular to the direction of the fluid. The gate valve can only be fully open and fully closed, and cannot be adjusted and throttled. The gate has two sealing faces. The two sealing faces of the most common mode gate valves form a wedge shape, and the wedge angle varies with valve parameters.

Classification of gate valve driving methods: manual gate valve, pneumatic gate valve, electric gate valve;
Gate valves are classified according to the structure of the sealing elements: parallel gate valves and detent gate valves;
Gate valves can also be classified according to the structure of the valve stem: open gate valve and dark rod gate valve.

Drill just rely on the motor to drive the drive gear to increase the strength of the drill bit rotation, so that the drill bit metal, wood and other materials to do the form of scraping holes.

The impact drill is equipped with adjusting knob,adjustable drill and impact drill in two ways. But the impact drill is used on the inner shaft gear beating each other to realize the impact effect, but the impact is far less than electric hammer. It can also drill reinforced concrete, but the effect is poor.
    
Hammer Drill is not the same, it is the use of the bottom of the motor drive two sets of gear structure, one to achieve it drilling, while the other is driven piston, like the engine hydraulic stroke,  resulting in a strong impact force.

Drill and Hammer Drill

Hammer Drill,Electric Hammer Drill,Rotary Hammer Drill,Dewalt Hammer Drill

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