Cast Iron Chemistry

Gate Valves Ductile Iron Cast Iron  Manufacturing
Gate Valves Ductile Iron Cast Iron Manufacturing
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Ductile Iron Pipe Cast Iron EN545 DN800
Ductile Iron Pipe Cast Iron EN545 DN800
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Ductile Iron Pipe Cast Iron DN500 EN598
Ductile Iron Pipe Cast Iron DN500 EN598
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Grating Ductile Iron Cast Iron High Quality
Grating Ductile Iron Cast Iron High Quality
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Manhole Cover B125 Cast Iron Ductile Iron
Manhole Cover B125 Cast Iron Ductile Iron
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Ductile Iron Pipe Cast Iron EN545  DN500
Ductile Iron Pipe Cast Iron EN545 DN500
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Butterfly valve Cast Iron and Ductile Iron
Butterfly valve Cast Iron and Ductile Iron
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Ductile iron/ cast iron gate valve pn16
Ductile iron/ cast iron gate valve pn16
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Ductile cast iron fittings
Ductile cast iron fittings
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CAST IRON PIPE-EN877
CAST IRON PIPE-EN877
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EN877 CAST IRON FITTINGS
EN877 CAST IRON FITTINGS
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DRAINAGE CAST IRON FITTINGS
DRAINAGE CAST IRON FITTINGS
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FITTINGS CAST IRON
FITTINGS CAST IRON
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EN877 FITTING CAST IRON
EN877 FITTING CAST IRON
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EN877 - CAST IRON FITTINGS
EN877 - CAST IRON FITTINGS
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EPOXY CAST IRON DRAINAGE
EPOXY CAST IRON DRAINAGE
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CAST IRON FITTING
CAST IRON FITTING
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DRAINAGE-CAST IRON PIPE
DRAINAGE-CAST IRON PIPE
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EN877- EPOXY CAST IRON PIPE
EN877- EPOXY CAST IRON PIPE
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PIPE AND FITTING-CAST IRON
PIPE AND FITTING-CAST IRON
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Manhole Covers Cast Iron ,  Manufacturer Cast Iron Manhole
Manhole Covers Cast Iron , Manufacturer Cast Iron Manhole
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Ductile cast iron pipe DN500
Ductile cast iron pipe DN500
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EN877 FITTING CAST IRON DRAINAGE
EN877 FITTING CAST IRON DRAINAGE
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CAST IRON EN877 FITTING
CAST IRON EN877 FITTING
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Ductile Cast iron fittings
Ductile Cast iron fittings
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high quality ductile iron cast iron flanged swing check valve
high quality ductile iron cast iron flanged swing check valve
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ductile cast iron coupling
ductile cast iron coupling
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DRAINAGE SYSTEM - CAST IRON
DRAINAGE SYSTEM - CAST IRON
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EN877 CAST IRON FITTING
EN877 CAST IRON FITTING
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EN877 - CAST IRON FITTINGS- DRAINAGE
EN877 - CAST IRON FITTINGS- DRAINAGE
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Customized Cast Iron Cast Iron Butterfly Valve Body
Customized Cast Iron Cast Iron Butterfly Valve Body
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EN877 CAST IRON PIPE-DN100
EN877 CAST IRON PIPE-DN100
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ductile cast iron fitting
ductile cast iron fitting
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ductile cast iron fittings
ductile cast iron fittings
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BS EN877 Cast Iron Pipe
BS EN877 Cast Iron Pipe
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Supply Capability: 500吨 m.t/month
DRAINAGE CAST IRON PIPE
DRAINAGE CAST IRON PIPE
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FAQ

Notes on flat gate valves
internal structureThe 1 seat O ring seal and preload floating seat structure, so that import and export of two-way valve seal plate; and the structure of the normal valve opening and closing torque only 1/2, can easily open and close valves2. when fully open, the channel is smooth and straight, the flow resistance coefficient is extremely small, and there is no pressure loss. The pipeline can be cleaned through the hair bulb3 the packing structure with the ability of self sealing, without frequent adjustment, opening and closing very lightweight, and reliable seal, the stuffing box is arranged at the auxiliary seal oil into the structure, absolutely reliable sealing performance, thereby achieving zero leakage; solve the shortcomings of the general valve packing leakage of the most vulnerable4., when the flat gate valve is closed, it can automatically unload the inner cavity high pressure, and ensure the safe use5., fully enclosed structure, good protection performance, can adapt to all-weather requirements6., the valve seat sealing structure should be elastic, preload, upper and lower sealing seat at the same time sealed structure. The valve seat and the seal are always face to face sealed.The 7. seat has self-cleaning function and is free of direct airflow during valve opening or closing. The seat shall be made of lubricated, non wearing material.8. valve actuator failure will not affect the other parts of the valve, maintenance and replacement work can be carried out without removing the valve.9. yoke sleeve aluminum bronze yoke sleeve with pin type thrust bearing to minimize operation torque.10. stem - thread length until bracket; dowel and spot welding; stability.11. pressure seal - simple construction, with sectional retaining rings and silver plated low carbon steel gaskets, helps to remove and achieve the best bonnet seal.12. seat ring - welded seat ring is perpendicular to the flow channel and is easy to maintain.s
The legend of gate valve and stop valve
When the valve is installed, the medium can enter from the bottom of the valve core and enter the two way from the top. Medium from the spool into the advantages of the valve closed when the packing is not under pressure, can extend the service life of the packing, and can be pressure in front of the valve in the case of replacement of packing work. Medium from the spool into the bottom of the shortcomings of the valve driving torque is larger, about 1.05~1.08 times above the entrance, the stem by the axial force of large, easy to bend the stem. To this end, the media from below to enter the way, generally only applicable to small caliber manual stop valve, to the valve closed, the media acting on the spool of force is not greater than 350kg limit. Electric cut-off valve is generally used to enter the media from the top way. The disadvantage of the medium entering from the top is just the opposite of the way it is entered below.Compared with the gate valve, the utility model has the advantages of simple structure, good sealing performance, and convenient manufacture and maintenance. The disadvantage is that the liquid resistance is large, and the opening and closing force is large. Gate and globe valves are fully open closed type valve, cut off or connected as the medium use, not as a control valve.The range of application of stop valves and gate valves is determined by their characteristics. In the smaller passages, the cut-off valve is used when required for better shutoff; in the steam pipe and the large diameter water supply pipe, the gate valve is generally used because of less fluid resistance.s
What kind of valve is gate valve? Is it different from the cut-off valve?
Gate valve is applied to the big diameter pipeline valve, the valve is generally used in small pipe diameter pipeline, their internal structure is different, the valve can not regulate the flow of water, the valve can be. If you want to understand in detail, it is recommended to take a sample of valve manufacturers to see the internal structure.s
What are the differences between the gate valve and the cut-off valve?
Is the gate valve opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, is not suitable for regulation and throttle. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used wedge gate valves form a wedge. The wedge angle varies with valve parameters, usually 5o. Wedge gate valve can be made into a whole, called the rigid gate; can also be made to produce micro deformation of ram, in order to improve its process of deviation, make up the sealing surface angle in the process, the gate is called the flexible gate. Valve closed, the sealing surface can only rely on medium pressure to seal, that is to rely on medium pressure to the gate sealing surface pressure to the other side of the seat to ensure the sealing surface seal, which is self sealing. Most of the valve is forced seal, that is, when the valve closes, to rely on external force to force the gate to the seat, in order to ensure the sealing surface sealing.A stop valve is 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. As a result, this type of valve is ideal for use as a shut-off or regulator and throttlings
Will the water supply and drainage to wear civil air defense gate valve, the use of bright rod or dark rod?
3, soft sealing rubber lining valve plate size uniform, interchangeable. Therefore, the soft sealing gate valve will be the direction of development, but also the water supply industry is willing to adopt a valve.s
Does the relief valve have a gate valve?
With the ball valve, needle valve, with the valve did not see, but there should be some.s
What do you mean by "2" and "200 CF8M"?
CF8M is stainless steel, and 2 is caliber 50200 and should also be bores
What are the features and uses of the gate valve?
1) advantages: sealing performance than the cut-off valve, the fluid resistance is small, open and close more effort, full sealing surface by the erosion of media, media flows from the restrictions, with double flow, small structure length, wide application range. 2) disadvantages: high size, open need a certain space, opening and closing time is long, in the opening and closing, the sealing surface is easy to erode and scratch, and the two sealing pairs bring difficulties to the processing and maintenance.3) use: gate valve is generally used in the caliber of DN15-1800mm pipes and equipment, and its dosage is great, mainly cutting off function, not allowed to throttle.s

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