Ductile Iron Knife Gate Valve for Wast Water

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Product Description:

Cast iron valves
Size: DN40-1200 or 1.5-48' or above
Working Pressure: PN10/16/20/25, 150LB-2500LB
Suitable temperature: -45c~150c
Standard:
(1)Design and manufacture: DIN3352, BS5163, BS5150, ANSI B16.34, API600, API6D, API609, EN593, GB, T12238
(2)End connection: ANSI B 16.1, ASME B16.5, B16.47, B16.25, B16.34, JISB2212-JISB2214, DIN2543-2550, EN1092, AS2129, ISO 5211
(3)Wall thickness: API600, BS1868
(4)Face to face (end to end): EN 558, ASME B16.10, DIN3202, ISO5752, JIS, API609, MSS, BS5155
(5)Inspection and test: API598, EN12266-1, BS6755, API6D, ISO5208
Materialfor main parts:
(1)Body: CI, DI, WCB, ALB, CF8, CF8M
(2)Disc: DI, ALB, C95400, Rubber lined Disc, 1.2501, 1.4529, CF8M, CF8, Hastelloy
(3)Stem: SS416, SS410, SS304, SS431
(4)Seat: NR, Hypalon, EPDM, Neoprene, NBR, Wear-Resistant EPDM, Viton, Silicon, Heat-Resistant EPDM, WhiteNBR, WhiteEPDM, EPDM, PTFE
Coating: Fusion bonded epoxy coated
Connection type: Flanged type, Push-on type, Mechanical Joint type, Plain ends type
Sealing: Soft sealing or metal-to-metal seat, Flexible graphite
Operation: Manual, Pheunatic, Electric, Hydraulic and Pnewmatic-Hydraul
Appropriate medium: Air, water, sewage, steam, coal gas, oil
Packaging: Export polywood cases, or as per customers' requirements
Application: Fresh water, sewage, sea water, air, vapor, food, medicine, oils. Acids, alkalis, salt etc.

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Q:What are the advantages of an air operated ball valve in comparison with other types of valves?
The thrust bearing reduces the friction torque of the stem, so that the valve stem can be operated stably for a long time.The utility model has the advantages of simple structure, small size and light weight.Convenient operation, open and close rapidly: from fully open to fully closed as long as 90 degree rotation, facilitate remote control.Easy maintenance: ball valve structure is simple, the sealing ring is generally active, disassembly and replacement are more convenient.
Q:Pneumatic two stage ball valve principle
Two section type pneumatic ball valve, pneumatic piston two stage shut-off valve to achieve a two step or two step off the action of the cut-off valve is a special pneumatic valve, provides 0 degrees, 45 degrees, 90 degrees or 0 degrees, 90 degrees, three operating mode 180 degrees.
Q:What is the difference between ball valve Q41F-16C and Q41F-16P?
Ball valve Q41F-16CQ valve (Qiu represents the first letter of the alphabet), 4 representatives of 1 representative is flanged ball valve floating ball (ball valve floating ball and fixed ball, 7 ball, F fixed on behalf of) on behalf of PTFE- PTFE seal (PTFE PTFE), representing 16 of the nominal pressure valve is 16 kg (1.6Mpa). C ball valve is made of cast steel.Ball valve Q41F-16C is a soft sealed cast steel flanged ball valve
Q:Ball valve faucet handle rotation, the ball does not move, how to repair?
There is a ball groove, the shaft is connected with a handle is installed in the tank, due to frequent water tap connecting parts have a certain slope groove and the shaft, causing slipping the ball still turn the handle when (the metal ball). Difficult to repair, usually replace the whole ball valve.
Q:Under what circumstances with the butterfly valve, under what circumstances with the ball valve?
Butterfly valve for occasions:Butterfly valve is suitable for flow regulation. Due to the pressure loss of the butterfly valve in the pipe is relatively large, is about three times the gate, so the choice of valve, the piping system should fully consider the influence of the pressure loss should also be considered robust when closing the butterfly plate to withstand the pressure medium pipeline. In addition, the operating temperature limit of resilient seat materials must be taken into account at elevated temperatures.Butterfly valve structure length and overall height is small, open and close speed is fast, and has good fluid control characteristics, butterfly valve structure principle is most suitable for making big mouth valve. When the butterfly valve is used as a control flow, the most important thing is to choose the size and type of butterfly valve so that it can work properly and effectively.Usually, in throttling, adjusting control and slurry medium, the structure length is short and the opening and closing speed is fast (1/4 rpm). Low pressure cut-off (small pressure), butterfly valve is recommended.Butterfly valves can be used in double adjustment, necking channels, low noise, cavitation and gasification, with little leakage to the atmosphere and corrosive media.
Q:What does the RTFE say in the ball valve?
RTFE reinforced PTFE is more wearable than PTFETeflon PTFEThe seat of tetrafluoroethylene specified for a temperature range of ~200 DEG C -32. High temperature resistance and chemical resistance. Because of its high density and good permeability, PTFE can also prevent the corrosion of most chemical media.Conductive PTFE is an improved PTFE product that allows the current to pass through the lining and thereby cancel the insulation properties of ptfe. Because of its conductivity, conductive PTFE can not be checked by edm.+ reinforced PTFE RTFERTFE is a modification of PTFE material. Pure PTFE although very low coefficient of friction (0.02~0.04) but the wear volume is great, but also because of its easy creep, poor mechanical properties, low bearing capacity, poor dimensional stability characteristics such as friction material has great localization. Only modified by compound method to meet the special requirements of all walks of life sealing material on the wear resistance, to improve the wear resistance of PTFE, can be incorporated into some wear-resistant materials such as glass fiber, carbon fiber, graphite, molybdenum disulfide, bronze powder and some organic compounds, making them reticular junction formed in the PTFE layered structure so as to improve the the stiffness, thermal conductivity, creep resistance, and greatly improve the wear resistance.PTFE is composed of tetrafluoroethylene monomer polymerization of the polymer, the wax is similar to a PE transparent or opaque, its density is 2.2g/cm3, the water absorption rate of less than 0.01%. Its chemical structure is similar to that of PE, except that all hydrogen atoms in polyethylene are replaced by fluorine atoms. Because the C-F bond is high and stable in performance, it has excellent chemical resistance
Q:DN15 stainless steel ball valve 304 can withstand much pressure?
All pipe attachments of the same nominal diameter indicated by the same nominal pressure PN have the same connection dimension as the end connection type.GB stainless steel ball valve pressure class PN: 1.6MPa, 2.5MPa, 4.0MPa, 6.4MPa, 10.0MPa and so on. These values correspond to how much stress you can bear.
Q:Butterfly valve, globe valve, ball valve used what is different
Butterfly valve, globe valve, ball valve used in different occasions:1. valve (Butterfly Butterfly) refers to the closure of parts (valve or butterfly plate) for the disk, around the valve shaft to achieve rotation and closure of a valve, the main cut off on the pipe and throttling. Butterfly valve headstock is a disc shaped disc, in the valve body around its own axis of rotation, so as to achieve the purpose of opening or closing or regulation. Butterfly valve is fully open to fully closed is usually less than 90 degrees, butterfly and butterfly stroke itself has no self-locking capability, in order to position the disc to install the valve stem on the worm gear. Using worm gear reducer, not only can the butterfly plate have self-locking ability, so that the butterfly board stops at any position, but also can improve the operation performance of the valve.Industrial butterfly valve features, capable of high temperature, applicable pressure range is higher, the valve nominal diameter is large, the valve made of carbon steel, the valve plate sealing ring using metal rings instead of rubber rings. Large high temperature butterfly valve welded by steel plate, mainly used for high temperature smoke duct and gas pipe.
Q:What is the diameter of the 2 inch ball valve?
2 inch ball valve, diameter is two inches.Turn left and turn right |Ball valve, standard GB/T21465-2008 "valve terminology" is defined as: open and close parts (spheres) driven by the stem, and around the axis of the ball valve to rotate the valve movement. Can also be used to regulate and control fluid, strong shear force between the metal seat seal V type ball valve V type ball core and welding hard alloy, especially suitable for containing fibers, small solid particles and other media. Switch and multi way valve in the pipeline not only can flow, and flow diversion, flexible control of the medium, but also to turn off any channel to the other two channels. This kind of valve should be installed horizontally in the pipeline. In accordance with the way to drive the ball valve is divided into: pneumatic ball valve, electric ball valve, manual ball valve.Turn left and turn right |The answer is recommended by He Xiaoqiang, a member of the science education category
Q:What is the nominal pressure 1.6p of a ball valve?
Nominal pressure PN is a digital indication of pressure related signs, which is a convenient round integer for reference. All pipe attachments of the same nominal diameter indicated by the same nominal pressure PN have the same connection dimension as the end connection type.

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