Product Code : VF--ZCC-208-CU
Structural characteristics
The structure of a stop valve is simpler than that of a gate valve, and it is more convenient to manufacture and maintain.
(2) The sealing surface is not prone to wear or scratches, and it has good sealing performance. When opening and closing, there is no relative sliding between the valve disc and the sealing surface of the valve body, so the wear and scratches are not severe. It has good sealing performance and a long service life.
(3) When opening and closing, the travel of the valve disc is small, so the height of the stop valve is smaller than that of the gate valve, but its structural length is longer than that of the gate valve.
(4) The opening and closing torque is large, it is difficult to open and close, and the opening and closing time is long.
(5) The fluid resistance is large. Due to the tortuous medium passage inside the valve body, the fluid resistance is high and the power consumption is large.
(6) When the nominal pressure PN of the medium flow direction is ≤16MPa, the co-current flow is generally adopted, with the medium flowing upward from the bottom of the valve disc. When the nominal pressure PN is ≥20MPa, counter-flow is generally adopted, with the medium flowing down from the top of the valve disc. To increase the performance of the sealing parts. When in use, the medium of the stop valve can only flow in one direction and the flow direction cannot be changed.
(7) When fully open, the valve disc is often eroded.
The valve stem axis of the stop valve is perpendicular to the sealing surface of the valve seat. The opening or closing stroke of the valve stem is relatively short and it has a very reliable cut-off action, making this type of valve suitable for use as a medium cut-off, regulation and throttling device.
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The opening and closing part of the J41W16 titanium stop valve is a plug type valve disc. The sealing surface is flat or conical, and the valve disc moves linearly along the centerline of the valve seat. The movement form of the valve stem (common name: concealed stem), also known as the shut-off valve, belongs to the forced sealing type valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from below the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force required to close the valve is greater than that required to open it, so the diameter of the valve stem should be larger; otherwise, the valve stem may bend at the top.
Application
It is almost non-corrosive in the atmosphere, fresh water, seawater and high-temperature steam.
It is highly corrosion-resistant in alkaline media.
It has strong resistance to chloride ions and excellent corrosion resistance to chloride ions.
It has excellent corrosion resistance in media such as aqua regia, sodium hypochlorite, chlorine water and wet oxygen.
It has excellent corrosion resistance in media such as aqua regia, sodium hypochlorite, chlorine water and wet oxygen.
The corrosion resistance in organic acids depends on the reducing or oxidizing properties of the acid.
The corrosion resistance in organic acids depends on the reducing or oxidizing properties of the acid.
Packing of Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition
