日标截止阀

The opening and closing parts of the LPG globe valve are plug shaped discs with a flat or conical sealing surface and the discs move in a straight line along the center line of the fluid. The movement of the stem is in the form of an elevating rod (stem elevating, handwheel not elevating) or an elevating rotating rod (hａnd wheel elevating with stem, nut on body). Striated globe valves for full - open and full - off, not allowed for regulation and throttling. LPG globe valve is a forced seal valve, so when the valve is closed, the need to apply pressure to the disc, in order to force the sealing surface does not leak. When the medium from the lower part of the valve disc into valve six, the operating force needs to overcome the resistance, is the friction of the valve stem and packing force and by the pressure of the medium produced by the thrust, the force of closing the valve than the force of opening the valve, so the diameter of the valve stem to be large, otherwise the failure of stem bending will occur. In recent years, from the appearance of self-sealing valve, the flow of the globe valve medium into the valve cavity by the upper part of the disc, then in the medium pressure, the force of closing the valve is small, and the force of opening the valve is large, the diameter of the valve stem can be reduced accordingly. At the same time, in the medium action, this form of valve is also more stringent. Our country valve "3 change to give" once stipulated, the direction of globe valve, all adopt top down. When the LPG stop valve is opened, the opening height of the disc is 25%~30% of the nominal diameter, the flow rate is large, indicating that the valve has reached the full open position. Therefore, the full open position of the globe valve should be determined by the stroke of the disc.

Instructions for ordering:
1. If there is no selected model, please provide detailed parameters, such as medium, temperature, pressure, caliber, material, etc., and our technicians will select the model for you
Ii. If the selected model is available, please provide it according to the selected model
Non-standard products shall be provided with samples or confirmed by drawings
Note: the information is for reference only, or may not be complete, so we apologize for any inconvenience caused to you. The company can be selected according to different requirements and parameters. The company has various sizes of caliber, pressure, different materials, connection mode, drive mode, to meet different needs of various types of gate valves. Please contact  or consult online.

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