Closing valve opening and closing pieces of plug-shaped flap, the sealing surface was flat or tapered surface, the valve flap along the fluid center line for linear motion. Stem movement form, lifting rod (stem lift, hand wheel does not lift), there are lifting rotary rod (hand wheel with the stem rotating together, the nut is located in the valve body). Globe valve only applies to fully open and fully closed, does not allow for regulation and throttling. Stop valves are forced to seal the valve, so the valve is closed, the pressure must be applied to the valve flap to force the sealing surface does not leak. When the medium from the bottom of the valve into the valve six, the operating force needed to overcome the resistance is the stem and packing friction and the pressure generated by the media thrust, off the valve force than the valve opening force, so the valve The diameter of the rod should be large, otherwise it will happen to the top of the valve stem failure. In recent years, since the self-sealing valve appears, the cut-off valve of the media flow to change over from the top of the valve into the valve cavity, then under medium pressure, the valve closing force is small, and open the valve force, the valve stem The diameter can be reduced accordingly. At the same time, in the medium, this form of valve is also more stringent. China's valve "three to" have provided that the flow of the valve, all from top to bottom. When the valve is open, the valve opening height, 25% to 30% of the nominal diameter, the flow has reached its maximum, indicating that the valve has reached the fully open position. Therefore, the full-stop position of the valve, valve stroke should be determined. Globe valve has the following advantages: 1. Simple structure, manufacturing and maintenance more convenient. 2 small work schedule, opening and closing time is short. 3. Good sealing, sealing surface friction, longer life expectancy. The shortcomings of the cut-off valve are as follows: 1. Fluid resistance is large, the required force is large when opening and closing. 2 does not apply to particles with a larger viscosity, easy to caking medium. 3. Adjust the performance is poor. The type of stop valve by the position of the threaded stem is externally threaded type, the female type. By media flow points, there are straight-through, DC and angle. Globe valve by sealing form points, there are packing seal globe valve and bellows seal valve. Shut-off valve installation and maintenance should note the following: 1. Handwheel, handle operated shut-off valve can be installed in any position on the pipeline. 2. Handwheel, handle and Wei moving mechanism, do not allow lifting. 3. The flow direction of the medium should be the same as the arrow direction of the valve body.

Push Button Hand Shower

The utility model discloses a Kitchen Shower head that is convenient to switch the water outlet mode, has a compact structure, and is easy to use, and a kitchen faucet using the kitchen shower head. , The shower head is provided with a water separator, and the water separator is provided with an annular flow channel and an inner flow channel respectively connected to the spray water outlet body and the V-shaped water outlet body, and the lower end of the outer wall of the water separator is upwardly circular A plurality of water inlet holes connected to the annular flow channel are provided, and a first sealing ring is provided on the lower side of the water inlet hole; the water outlet end of the shower body is connected with a converter, and the converter is provided with a communicating In the water diversion cavity at the water outlet end of the shower body, the lower end of the water diversion device is installed in the water diversion cavity and can move up and down, and the upper end of the inner wall of the water diversion cavity is provided with a convex ring matching the first sealing ring, so The bottom surface of the water diversion cavity is provided with a sealing gasket that can seal the inner flow channel.

Waterfall Shower Head,Overhead Shower Head,Push Button Hand Shower,Brushed Nickel Sink Faucet

Yuyao Zelin Sanitary Ware Co., Ltd , https://www.kitchen-sinkfaucets.com

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