China high quality 900lb 2PC Worm Gear Flanged Floating Ball Valve with ISO/5210/5211 Mounting Pad wholesaler

Product Description

Brief Profile.
Top entry ball valve is mainly used in petro/natural gas pipelines,oil extraction,oil refinery,chemistry,metallurgy,electricity,food,paper-maing.,etc industry sectors.It is easy to assemble and disassemble,maintenance is very convenient.When the valve happen to malfunction,no need to take the valve down from pipelines,just screw the bolts and nuts down from middle flange,take the bonnet and steam from the body,then take the ball and seat assembly out to repair,it save time greatly,reduce the loss caused by production interruption.top entry ball valve can be divided into floating ball type and trunnion mounted type.
Main Specification.

  1. Design and manufacture confirm to ASME B16.34(BS 5351),API 608,MSS-SP-72,API 6D.
  2. Face to face length confrim to ASME B16.10,NPS ≥ 26″ per as ASME B16.47.
  3. End connection confirm to ASME B16.5,ASME B16.25.
  4. Inspection and test confirm to API 598.
  5. Fire safe design confirm to API 6,
No. Part Name Part Material
1 Bonnet WCB,LCB,CF8,CF3,CF8M,CF3M.,etc.
2 Body WCB,LCB,CF8,CF3,CF8M,CF3M.,etc.
3 Ball A105+ENP,A182-F6,F304,F304L,F316,F316L,F321,F51.,etc.
4 Seat Ring A105+ENP,A182-F6,F304,F304L,F316,F316L,F321,F51.,etc.
5 Seat PTFE,RPTFE,PEEK,PPL,NYLON,DEVLON.,etc.
6 Sealing Ring Flexible Graphite.
7 Spring SS 304,inconel x-750,1566+ENP.
8 Thrust Washer PTFE,RPTFE,Stainless steel+N
9 Bearing 1045+RPTFE,SS 304+RPTFE,SS 316+RPTFE.
10 Stem 1045+ENP,A182-F6,F304,F304L,F316,F316L,F321,F51,17-4PH.
11 Spring Ss 304,ss 316,ss 17-4PH
12 Ball Ss 304,ss 316
13 O-ring NBR,VITON
14 O-ring NBR,VITON
15 Gasket Ss 304,ss 316+flexible graphite.
16 Bonnet WCB,LCB,CF8,CF3,CF8M,CF3M.,etc.
17 Nut A194 2H,2HM,8,8M
18 Bolt A193 B7,B7M,B8,B8M
19 Packing PTFE,GRAPHITE
20 Bolt A193-B7,B8
21 Yoke WCB,CF8
22 Gear Purchased
23 Grease fitting 1571,ss304,ss304L,ss316,ss316L,ss 321,F51.,etc
24 Drain valve and plug 1571,ss304,ss304L,ss316,ss316L,ss 321,F51.,etc

Class 150LB
Size(in) L H H1 M W(kg)
RF RTJ BW
2 292 295 292 218 83 180 15
3×2 356 359 356 218 83 180 18
3 356 359 356 295 117 180 33
4×3 432 435 432 295 117 180 38
4 432 435 432 310 141 300 53
6×4 559 562 559 310 141 300 79
6 559 562 559 340 193 300 111
8×6 660 664 660 340 193 300 124.5
8 660 664 660 405 217 300 182
10×8 787 791 787 405 217 300 235
10 787 791 787 465 270 300 369
12×10 838 841 838 465 270 300 352.5
12 838 841 838 607 323 300 577.5
14×12 889 892 889 607 323 300 603
14 889 892 889 650 323 400 685.5
16×14 991 994 991 650 355 400 721.5
16 991 994 991 678 400 450 1084.5
18×16 1092 1095 1092 678 400 450 1147.5
18 1092 1095 1092 720 440 500 1318.5
20×18 1194 1200 1194 720 440 500 1470
20 1194 1200 1194 780 467 550 2310
24×20 1397 1406 1397 780 467 550 2715
24 1397 1406 1397 905 551 550 3981
30×24 1651 1664 1651 905 551 550 4356
26 1448 1460 1448 972 624 812 4680
28 1549 1562 1549 985 632 812 4815
30 1651 1664 1651 1042 715 812 5250
36×30 2083 2098 2083 1042 715 812 5828
32 1778 1794 1778 1120 985 812 7088
36 2083 2098 2083 1217 836 914 1571
40 2337 2337 2337 1345 900 914 14571
42 2437 2437 2437 1534 935 914 15533
48 2540 2540 2540 1586 1050 914 24315

 

Class 300LB
Size(in) L H H1 M W(kg)
RF RTJ BW
2 292 295 292 208 95 180 23
3×2 356 359 356 208 95 180 30
3 356 359 356 275 122 300 45
4×3 432 435 432 275 122 300 66
4 432 435 432 285 148 300 83
6×4 559 562 559 285 148 300 98
6 559 562 559 335 201 300 135
8×6 660 664 660 335 201 300 160.5
8 660 664 660 412 232 300 301.5
10×8 787 791 787 412 232 300 333
10 787 791 787 400 263 400 525
12×10 838 841 838 460 283 400 571.5
12 838 841 838 505 335 400 765
14×12 889 892 889 505 335 400 820.5
14 889 892 889 537 360 450 1080
16×14 991 994 991 537 360 450 1140
16 991 994 991 608 538 500 1750.5
18×16 1092 1095 1092 608 538 500 1885.5
18 1092 1095 1092 695 437 500 2289
20×18 1194 1200 1194 695 437 500 2484
20 1194 1200 1194 782 477 500 2808
24×20 1397 1406 1397 782 477 500 3378
24 1397 1406 1397 896 585 550 4512
30×24 1651 1664 1651 896 585 550 5637
26 1448 1460 1448 932 630 550 5124
28 1549 1562 1549 963 683 550 5802
30 1651 1664 1651 1068 715 762 7461
36×30 2083 2098 2083 1068 773 762 8973
32 1778 1794 1778 1108 773 812 8511
36 2083 2098 2083 1200 875 914 11349
40 2337 2337 2337 1355 923 914 14452.5
42 2437 2437 2437 1355 958 914 16321.5
48 2540 2540 2540 1600 1108 914 23085

 

Class 600LB
Size(in) L H H1 M W(kg)
RF RTJ BW
2 292 295 292 195 102 300 50
3×2 356 359 356 195 102 300 56
3 356 359 356 220 129 300 102
4×3 432 435 432 220 129 300 114
4 432 435 432 295 158 300 146
6×4 559 562 559 295 158 300 153
6 559 562 559 335 200 300 283
8×6 660 664 660 335 200 300 307
8 660 664 660 408 255 400 508.5
10×8 787 791 787 408 255 400 643
10 787 791 787 508 302 450 777.5
12×10 838 841 838 508 302 450 817.5
12 838 841 838 594 346 500 1440
14×12 889 892 889 594 346 500 1488
14 889 892 889 648 385 500 1875
16×14 991 994 991 648 385 500 1992
16 991 994 991 685 418 500 2958
18×16 1092 1095 1092 685 418 500 3183
18 1092 1095 1092 775 460 500 26115
20×18 1194 1200 1194 775 460 500 2764.5
20 1194 1200 1194 883 525 550 3315
24×20 1397 1406 1397 883 525 812 4621.5
24 1397 1406 1397 942 615 812 5235
30×24 1651 1664 1651 942 615 812 6744
26 1448 1460 1448 984 635 812 6787.5
28 1549 1562 1549 1016 700 812 7722
30 1651 1664 1651 1100 730 914 8652
36×30 2083 2098 2083 1100 730 914 1571
32 1778 1794 1778 1288 796 914 10362
36 2083 2098 2083 1360 890 914 13117.5
40 2337 2337 2337 1408 950 914 17977.5
42 2437 2437 2437 1535 989 1016 21150
48 2540 2540 2540 1775 1120 1016 32427

 

Class 900LB
Size(in) L H H1 M W(kg)
RF RTJ BW
2 292 295 292 195 102 300 50
3×2 356 359 356 195 102 300 56
3 356 359 356 220 129 300 102
4×3 432 435 432 220 129 300 114
4 432 435 432 295 158 300 146
6×4 559 562 559 295 158 300 153
6 559 562 559 335 200 300 283
8×6 660 664 660 335 200 300 307
8 660 664 660 408 255 400 508.5
10×8 787 791 787 408 255 400 643
10 787 791 787 508 302 450 777.5
12×10 838 841 838 508 302 450 817.5
12 838 841 838 594 346 500 1440
14×12 889 892 889 594 346 500 1488
14 889 892 889 648 385 500 1875
16×14 991 994 991 648 385 500 1992
16 991 994 991 685 418 500 2958
18×16 1092 1095 1092 685 418 500 3183
18 1092 1095 1092 775 460 500 26115
20×18 1194 1200 1194 775 460 500 2764.5
20 1194 1200 1194 883 525 550 3315
24×20 1397 1406 1397 883 525 812 4621.5
24 1397 1406 1397 942 615 812 5235
30×24 1651 1664 1651 942 615 812 6744
26 1448 1460 1448 984 635 812 6787.5
28 1549 1562 1549 1016 700 812 7722
30 1651 1664 1651 1100 730 914 8652
36×30 2083 2098 2083 1100 730 914 1571
32 1778 1794 1778 1288 796 914 10362
36 2083 2098 2083 1360 890 914 13117.5
40 2337 2337 2337 1408 950 914 17977.5
42 2437 2437 2437 1535 989 1016 21150
48 2540 2540 2540 1775 1120 1016 32427

 

Class 1500LB
Size(in) L H H1 M W(kg)
RF RTJ BW
2 368 371 368 287 122 300 60
3×2 470 473 470 287 122 300 75
3 470 473 470 319 163 300 143
4×3 546 549 546 319 163 300 162
4 546 549 546 347 173 300 270
6×4 705 711 705 347 173 300 338
6 705 711 705 415 211 400 570
8×6 832 841 832 415 211 400 727.5
8 832 841 832 545 274 450 1125
10×8 991 1000 991 545 274 450 1434
10 991 1000 991 648 310 500 1747.5
12×10 1130 1146 1130 648 310 500 1900.5
12 1130 1146 1130 766 485 500 2437.5
14×12 1257 1276 1257 766 485 500 2737.5
14 1257 1276 1257 831 510 550 2970
16×14 1384 1407 1384 831 510 550 3420
16 1384 1407 1384 872 500 550 5310
18×16 1537 1559 1537 872 500 550 6744
18 1537 1559 1537 903 585 812 7236
20×18 1664 1686 1664 903 585 812 9132
20 1664 1686 1664 1571 635 914 1 0571
24×20 2043 2071 2043 1571 635 914 12481.5
24 2043 2071 2043 1107 720 914 16267.5

 
 

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.
screwshaft

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are 2 types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The 2 types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are 2 types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in 2 stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to 6 times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.
screwshaft

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are 2 different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.

Material

Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each 1 is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.
screwshaft

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the 2 materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

China high quality 900lb 2PC Worm Gear Flanged Floating Ball Valve with ISO/5210/5211 Mounting Pad wholesaler China high quality 900lb 2PC Worm Gear Flanged Floating Ball Valve with ISO/5210/5211 Mounting Pad wholesaler

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