Gp240gh Rising Stem Gate Valve

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DIN WCB/GS-C25/GP240GH Rising Stem Gate Valve

Specification:

Size: DN15-DN1200

Model:Z40H
Pressure: PN16-PN250
Material: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M.Etc

Type: Rising Stem and Wedge Single Disc, Solid or Flexible wedge, flat gate.

Operation: Handwheel, gear worm ,Electric operated

Standard:
Design & Manufacture Std.: GB/T12234,DIN3352,GOST 12820-80,Etc.

Face to Face Std.: GB/T12221,DIN3202,Etc.

End Connection Std.: JB/T79,DIN2543-2550,GOST 12820-80,Etc.

Test Standard: ISO5208, API 600, BS 6755

Full Port Design, OS&Y, Outside and Screw, Bolted bonnet, Back Seal Structure
Flexible wedge, Fully guided, Choice of Solid or Split wedge
Renewable or welded seat
Extended stem design for low temperature
Flanged or Butt-welding ends

Q: Gate valve, butterfly valve, ball valve advantages and disadvantages? What are the usual valves?: Stop valve: a valve that closes the valve and moves along the center line of the valve seat. According to this form of valve movement, the valve seat opening change is proportional to the valve stroke. Because of the valve stem to open or close the trip is relatively short, but very reliable cut off function, and because changes in the valve seat and the valve stroke is proportional, is very suitable for flow regulation. Therefore, this type of valve is very cooperative for cutting or regulating and throttling.Advantages: in the process of opening and closing, because the friction between the valve and the sealing surface of the valve body is smaller than that of the gate valve, the utility model has the advantages of wear resistance. Second, the opening height is generally only 1/4 of the seat channel; therefore, it is much smaller than the gate valve; usually there is only one sealing surface on the valve body and the disc; therefore, the manufacturing process is better and the service is easy to maintain. Because its packing is generally a mixture of asbestos and graphite, it has a higher temperature resistance. Steam valves are normally used with stop valves.Disadvantages: as a result of the medium through the valve flow direction has changed, so the minimum flow resistance valve is higher than most other types of valves; second, due to longer travel, opening slower than the ball.

Q: Function of signal butterfly valve and gate valve: The signal butterfly valve applies to petroleum, chemical, food, medicine, papermaking, water and electricity, ships, water supply and drainage, smelting, energy and other system pipelines. Available in a variety of corrosive, non corrosive gases, liquids, semi fluids, and solid powders.

Q: Gate valve type Z40Y, Z40H letters - what does that mean?: According to the provisions of the JB/T 308-2004 valve type programming method:Z== gate valve4== connection: flange0== structure: wedge type elastic RAMY== sealing surface material: hard alloyH== sealing surface material: Cr13 stainless steel

Q: What's the difference between open rod gate and dark rod gate valve?: 3, dark rod valve is located inside of the body, in the process of opening and closing, stem only rotation move, the gate in the valve body lifting; the valve stem rod driven gate valve with the valve stem of the lifting drive thread in the external body, according to the direction of movement of the stem and the position of judge the gate opening and closing and position;

Q: Is the gate valve clockwise or closed?: In general, the valve is clockwise turn off, in the case of special requirements under the opening.

Q: What is the difference between Z41X gate valve and Z45X gate valve?: There is no difference in function. The two models are mainly made of different sealing materials,

Q: Function of gate valve: Gate valve is a closed (gate) along the central line of the vertical direction of the valve moving. Valve in the pipeline can only be fully open and fully closed off, can not be adjusted and the throttle. Gate valve is a valve used in a wide range, generally more than 50mm caliber DN block device is selected it, sometimes cut off very small aperture devices are used to gate valve, gate valve is used as cut-off media, when in full flow through the whole, when the media is running a minimal pressure loss. Gate valves are normally used in situations where they do not need to be frequently opened and closed, and the gate is fully open or fully closed. Not used as an adjustment or throttling. For high speed moving medium, the gate can cause the vibration of the gate under the condition of partial opening, and the vibration may damage the sealing surface of the gate and the valve seat, while throttling will cause the gate to suffer the erosion of medium.

Q: What gate valve is the J41H-150LBDN100 gate valve?: J41H-150LBDN100 is not a gate valve, it is a API stop valve.API valve can only medium one-way flow direction when installing. Its structure length is larger than gate valve, and the fluid resistance is large. The reliability of sealing is not strong in long-term operation.Also called cut-off gate valve is the most widely used as a valve, it is popular is because the process of opening and closing the sealing surface friction between the small, more durable, highly open small, easy manufacture, convenient maintenance, not only for low pressure, but also suitable for high pressure.

Q: What is the size and length of the DN80 gate valve? 10 kg and 16 kg, respectively?: Valve structure length standards are PN16, short series for 203mm, long series for 280mm, flange size by PN16.

Q: Why does the centrifugal pump start and stop in the case of closing the gate valve?: After the valve is closed to stop the cause of centrifugal pump outlet valve is closed to stop the pump to prevent the flow back into the pump, impeller, impeller in reverse, part of the mechanical seal in the pump pump impeller reversal will have adverse consequences, serious damage to the centrifugal pump, to close the valve after the shutdown.

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