Top-mounted butterfly valve features and how to install

product description

The top-mounted metal hard-seal butterfly valve is based on the multi-level three-offset metal hard-seal butterfly valve, and is a new butterfly valve product developed according to the needs of users. In addition to all the excellent features of the triple-eccentric multi-level metal hard-sealing butterfly valve, it is also capable of two-way pressure bearing. One of the biggest advantages of the top-mounted butterfly valve is that it can be maintained in the field. With the choice of valve body material, the use temperature can be from -29 °C ~ 550 °C, due to its good flow characteristics, can not only cut off the media, but also can adjust the flow of the media.

Application area

Top-mounted hard-sealed butterfly valve is suitable for medium temperature -29°C-600°C, nominal pressure is 0.6-2.5MPa, medium is water, steam, oil, hot air, corrosive and other pipelines, in order to achieve the truncated fluid and regulate the flow of media The purpose is to optimize the opening and closing mechanism on various pipelines. Top entry Butterfly Valve control: worm, electric, pneumatic, network type <br> <br> Features

1. The new top-mounted structure solves the problem that traditional eccentric butterfly valves cannot be maintained in the field. In accordance with the original multi-level three-offset butterfly valve, when the seal is damaged, it is necessary to return it to the manufacturer for repair or to record the scrapping of a butterfly valve. The top-mounted butterfly valve does not need to be removed from the pipeline. It takes only a very short time to open the valve cover and can be removed from the valve body together with the stem and the butterfly plate to repair or replace the seal ring, and then the cover is sealed to seal the mouth. It can realize that the valve can not affect the normal operation of the pipeline system during the maintenance, so that the loss of benefit caused by the maintenance valve is reduced to the minimum;

2. Has all the excellent performance of multi-level three-offset metal hard seal butterfly valve;

3. Reliable sealing function, up to air seal without leakage;

4. Butterfly streamlined design, high strength, large flow area, small flow resistance, saving energy.

Top-mounted butterfly valve working principle:

The top-mounted hard-seal butterfly valve mainly consists of a valve body, a valve cover, a butterfly plate, a valve shaft, a valve body seal ring, a butterfly plate seal ring, a sleeve, a bottom cover, and a drive device. By rotating the handwheel of the butterfly valve, the worm wheel is driven to rotate, and the worm wheel drives the stem and the butterfly plate to rotate freely within 90 degrees relative to the valve body, so as to achieve the opening and closing of the top-mounted butterfly valve, thereby realizing the regulation of the flow and the cutting of the medium. For the purpose of the fluid, the butterfly valve is rotated clockwise to close the handwheel.

Hard seal butterfly valve implementation standards

1. Valve design, manufacture in accordance with: GB/T12238-1989 "General Valve Flange and Connector to Connect Butterfly Valve", JB/T8527-1997 "Metal Sealed Butterfly Valve";

2. Valve pressure test according to: GB/T13927-1992 "General Valve Pressure Test", JB/T9092-1999 "valve inspection and test";

3. Valve structure length in accordance with: GB/T12221-2005 "metal valve structure length";

4. Flange connection size according to: GB/T9113.1-2000 "planar, convex overall steel pipe flange."