Channel Cast Steel Globe Valve
1 cut-off valve according to the channel direction, divided into:
1) straight-through valve
2) DC-type valve: in the DC-type or Y-shaped valve, the valve of the flow channel and the main channel into a slash, this flow state extent of the damage is smaller than the conventional cut-off valve, so the pressure losses through the valve corresponding smaller.
3) angle type valve: the angle Forged Steel Globe Valve, the fluid simply by changing a direction, so that the pressure drop through the valve structure than the conventional cut-off valve small.
4) plunger-type valve: This valve is a conventional form of variable valve type. In this valve, the valve and seat are usually designed based on the principle of the plunger. Polished into the plunger and valve stem connected to the plunger seal is set on two flexible ring to achieve. Two flexible rings separated by a ring, and through the valve cover nut the load applied to the valve cover gasket around the plunger fastened. Elastic ring can be replaced, you can use a variety of materials, the valve is mainly used for “open” or “off”, but with a special form of plunger or special rings, can also be used to adjust flow rate.
The location of thread
2 According to the thread on the valve stem position can be divided into:
1) on the threaded stem valve: the valve stem threads outside of the body. The advantage is that stem from media erosion, facilitate lubrication, the use of such structures is relatively common.
2), the valve stem threads: threaded valve stem in the valve body. This structure in direct contact with the media stem threads, vulnerable to erosion, and can not be lubricated. Such a structure for small-caliber and high temperature areas.
The article comes from Globe Valve Manufacturers.