Welded Double-Sealed Rotary Ball Valve
Product Introduction
Most of the valves in the pipeline network system are mainly used to cut off and regulate the medium. These valves account for a large proportion of the entire system, have a large usage, and require durability and high cost-effectiveness. At the same time, they should be able to adjust and cut off the medium when it flows forward. They can also prevent medium backflow during pressure difference changes or maintenance, which means they have a bidirectional cut-off function. The welded end bi-directional rotary ball valve developed with years of design experience is a combination of the superior sealing performance of ball valves and the advantageous structural performance of butterfly valves. It not only has the practical advantages of bidirectional sealing, adjustability, and long service life of ball valves, but also has the advantages of small volume and light weight of butterfly valves. In fact, it is an eccentric hemispherical valve with a butterfly structure. The sealing principle combines the front sealing of fixed ball valves with the forced sealing of eccentric butterfly valves, Thus achieving bidirectional cut-off of high and low voltage. Advanced processes such as space plasma spraying, Ethernet laser sputtering, vacuum protection infiltration and overlay welding can be used to form gradient functional materials such as martensitic stainless steel, austenitic stainless steel, hard alloy, metal ceramic, and artificial diamond on the two sealing surfaces of the sealing pair according to different hardness requirements. It can automatically align with the center (adaptive), automatically compensate for wear and tear over the distance, automatically apply extremely high sealing pressure, and there is no friction between the sealing pairs when it is instantly closed or opened. When it is opened, the valve core projection continuously shrinks and retreats, and when it is closed, the valve core projection continuously expands and moves forward. With a short structure and small volume, it can manufacture valves with large, extra large, and extra large diameters. It has a series of advantages such as convenient transportation, installation, maintenance, and reliable operation, Becoming a major technological innovation in the valve industry.
All valves at the outlet of water pumps, pipeline systems, recycled water systems, high-level water tanks, sewage systems prone to flooding, and backflow prevention systems must use two-way flow valves. This valve is widely used for the opening, closing, and regulation of pipelines in industries and departments such as metallurgy, mining, petrochemical, chemical, power, environmental protection, and municipal engineering.
Sales Hotline：
Product Details
1. Simple and Compact Structure：The valve features a simple, compact
design with small volume and lightweight construction, ensuring flexible and convenient operation. Composed of only a few components, it enables quick 90°rotation for fast opening and closing, offering excellent fluid control characteristics. The pressure drop across the valve is minimal, providing superior flow control with low energy loss. When fully open, the water loss is zero, ensuring a completely unobstructed flow path. The internal cavity is self-cleaning—the 90°rotation of the ball automatically flushes the valve body, removing debris from the medium and preventing sediment buildup. The flat-faced ball design delivers a high Cv value, enhancing pump system efficiency and minimizing abrasion.
2. Resistance to Particle Abrasion：Utilizing a double-eccentric principle,
the ball only contacts the seat at the final moment of closure, eliminating friction. The seat’s sealing ring is overlaid with wear-resistant, self-lubricating alloy, ensuring resistance to wear and erosion. The knife-edged ball opening and seat provide a wiping and shearing action, preventing scaling.
3. Automatic Seat Compensation for Reliable Sealing：Forward Pressure:
The eccentric design ensures that the ball and seat tighten progressively, achieving excellent sealing.
Reverse Pressure: The floating seat automatically presses against the ball under pressure the higher the pressure, the tighter the seal.Durable Sealing: Maintains long-term sealing integrity even under harsh conditions. If the seat seal wears or gets damaged over time, the spring-loaded mechanism ensures automatic compensation, restoring optimal sealing performance.
4. Long Service Life & Smooth Operation：With no vulnerable components,
the eccentric mechanism ensures the ball and seat sealing surfaces completely disengage during operation, eliminating friction and reducing torque for effortless handling. The automatic compensation feature significantly extends the valve’s service life.
5. Hard-Sealed Spherical Structure：The ball valve employs a hard-sealed
spherical design, achieving bidirectional pressure-rated zero leakage. It is resistant to high temperatures, high pressure, corrosion, and abrasion.
6. Flangeless Design：The valve’s flangeless construction provides
significant convenience and aesthetic benefits for pipeline installation and insulation wrapping.
Performance specification
|
Nominal pressure |
1.6 |
2.5 |
4.0 |
6.4 |
Class150 |
Class300 |
Class600 |
|
Max working pressure (Mpa) |
1.6 |
2.5 |
4.0 |
6.4 |
2.0 |
5.0 |
10.0 |
|
Shell strength test pressure (Mpa) |
2.4 |
3.8 |
6.0 |
9.6 |
3.0 |
7.5 |
15.5 |
|
Gas seal test pressure (Mpa) |
0.6 |
0.6 |
0.6 |
0.6 |
0.6 |
0.6 |
0.6 |
|
High pressure seal test pressure (Mpa) |
1.76 |
2.75 |
4.4 |
7.1 |
2.2 |
5.5 |
11.0 |
|
Rate of leakage |
<0.1×DNmm3/s (Comply with GB/T13927 standard ) |
||||||
|
Applicable temperature |
Soft seal : -40℃~350℃； Hard seal : -50℃~600℃ |
||||||
|
Applicable medium |
Natural gas, water vapor, water, oil, acid, alkali, pulverized coal, coal ash, waste residue, mud, containing particles, containing fiber and other media |
||||||
|
Form of transmission |
Worm gear, electric, pneumatic, electric hydraulic |
||||||
Performance comparison of welded double - way rotary ball valve with others
|
Product name Comparing items |
Welded end bi-directional rotary ball valve |
Fully welded eccentric hemispherical valve |
Fully welded ball valve |
Butt welding butterfly valve |
|
Maximum valve diameter |
DN4000 |
DN2000 |
DN1400 |
DN2000 |
|
Size of valve footprint |
Small |
Large |
Large |
Small |
|
Form of seal |
Soft and hard double seal full metal hard seal |
Soft seal |
Soft seal |
Multi layer seal |
|
Whether the pipe and insulation are convenient and beautiful |
YES |
NOT |
NOT |
YES |
|
There is no friction during opening and closing |
No friction at all |
There is slight friction |
Severe friction |
Serious friction |
|
Seal wear and wash resistance |
Very well |
Well |
Poor |
Very poor |
|
Valve flow resistance size |
Very small |
small |
without |
Very high |
|
Can be used in water content high hardness granular media |
Can |
Can |
Not |
Not |
|
Can be used in water containing high crystallization or scaling media |
Can |
Can |
Not |
Not |
|
Whether there is stuck under the condition of large temperature change |
Not at all |
have |
have |
have |
|
Whether the impurities in the medium are easily deposited in the valve cavity |
Not at all |
able |
easy |
able |
|
With or without cutting fiber function |
have |
without |
without |
without |
|
Whether there is automatic compensation for wear caused by long-term use |
have |
without |
have |
without |
|
Whether it has the advantages of small size, small installation height, light weight, energy saving and environmental protection |
have |
Not |
Not |
Not |
Main parts material
|
Name |
Material |
|||
|
Body |
WCB |
ZG1Cr18Ni9Ti |
ZG0Cr18Ni12Mo2Ti |
ZG15Cr1Mo1V |
|
Ball |
WCB |
ZG1Cr18Ni9Ti |
ZG0Cr18Ni12Mo2Ti |
ZG15Cr1Mo1V |
|
Seat |
A105+STL or PTFE |
1Cr18Ni9Ti+STL or PTFE |
0Cr18Ni12Mo2Ti+STL or PTFE |
25Cr2Mo1V+STL or PTFE |
|
Pressure plate |
A105 |
1Cr18Ni9Ti |
0Cr18Ni12Mo2Ti |
25Cr2Mo1V |
|
Stem support |
WCB |
ZG1Cr18Ni9Ti |
ZG0Cr18Ni12Mo2Ti |
ZG15Cr1Mo1V |
|
Upper stem |
2Cr13 |
1Cr18Ni9Ti |
0Cr18Ni12Mo2Ti |
1Cr18Ni9Ti |
|
Upper shaft sleeve |
SF-1 |
FB090 |
FB316 |
FB090 |
|
Lower stem |
2Cr13 |
1Cr18Ni9Ti |
0Cr18Ni12Mo2Ti |
1Cr18Ni9Ti |
|
Lower shaft sleeve |
SF-1 |
FB090 |
FB316 |
FB090 |
|
Back cover |
A105 |
1Cr18Ni9Ti |
0Cr18Ni12Mo2Ti |
25Cr2Mo1V |
|
Bolt |
35 |
0Cr18Ni9 |
0Cr18Nig |
15Cr1Mo1V |
|
Nut |
45 |
0Cr18Ni9 |
0Cr18Ni9 |
20CrMo |
|
Packing |
Graphite |
Graphite |
Graphite |
Graphite |
|
Gland |
WCB |
ZG1Cr18Ni9Ti |
ZG0Cr18Ni12Mo2Ti |
ZG15Cr1Mo1V |
|
Bracket |
WCB |
WCB |
WCB |
WCB |
|
Electric Actuator |
KTQ |
|||
Main dimensions GWXQF3/6/9-206F/H/Y-6/64(C/P/R/I)
|
DN(mm) |
0.6MPa |
1.0MPa |
1.6MPa |
2.5MPa |
4.0MPa |
6.4MPa |
||||||
|
L |
D |
L |
D |
L |
D |
L |
D |
L |
D |
L |
D |
|
|
50 |
178 |
70 |
178 |
70 |
178 |
75 |
178 |
75 |
178 |
80 |
178 |
80 |
|
65 |
190 |
75 |
190 |
75 |
190 |
80 |
190 |
85 |
190 |
90 |
190 |
95 |
|
80 |
203 |
90 |
203 |
90 |
203 |
95 |
203 |
95 |
203 |
95 |
203 |
98 |
|
100 |
229 |
112 |
229 |
116 |
229 |
120 |
229 |
120 |
229 |
125 |
229 |
125 |
|
125 |
254 |
136 |
254 |
140 |
254 |
145 |
254 |
145 |
254 |
150 |
254 |
150 |
|
150 |
267 |
161 |
267 |
170 |
267 |
175 |
267 |
175 |
267 |
180 |
267 |
180 |
|
200 |
292 |
222 |
292 |
230 |
292 |
235 |
292 |
235 |
292 |
240 |
292 |
240 |
|
250 |
330 |
278 |
330 |
280 |
330 |
285 |
330 |
285 |
330 |
290 |
330 |
290 |
|
300 |
356 |
330 |
356 |
335 |
356 |
340 |
356 |
340 |
356 |
348 |
356 |
348 |
|
350 |
381 |
382 |
381 |
395 |
381 |
400 |
381 |
400 |
381 |
408 |
381 |
408 |
|
400 |
406 |
432 |
406 |
440 |
406 |
445 |
406 |
445 |
406 |
454 |
406 |
454 |
|
450 |
432 |
484 |
432 |
490 |
432 |
495 |
432 |
495 |
432 |
505 |
432 |
508 |
|
500 |
457 |
535 |
457 |
540 |
457 |
545 |
457 |
550 |
457 |
560 |
457 |
564 |
|
600 |
508 |
636 |
508 |
645 |
508 |
650 |
508 |
655 |
508 |
665 |
508 |
668 |
|
700 |
610 |
736 |
610 |
745 |
610 |
750 |
610 |
755 |
610 |
765 |
610 |
768 |
|
800 |
660 |
840 |
660 |
845 |
660 |
850 |
660 |
855 |
660 |
865 |
660 |
870 |
|
900 |
711 |
940 |
711 |
945 |
711 |
950 |
711 |
955 |
711 |
965 |
711 |
970 |
|
1000 |
811 |
1040 |
811 |
1045 |
811 |
1050 |
811 |
1055 |
811 |
1065 |
811 |
1070 |
|
1200 |
1015 |
1245 |
1015 |
1250 |
1015 |
1255 |
1015 |
1260 |
1015 |
1270 |
1015 |
1270 |
|
1400 |
1080 |
1445 |
1080 |
1450 |
1080 |
1455 |
1080 |
1460 |
1080 |
1470 |
1080 |
1470 |
|
1600 |
1300 |
1650 |
1300 |
1655 |
1300 |
1665 |
1300 |
1675 |
1300 |
1685 |
1300 |
1685 |
|
1800 |
1500 |
1850 |
1500 |
1855 |
1500 |
1865 |
1500 |
1875 |
1500 |
1885 |
1500 |
1890 |
|
2000 |
1675 |
2060 |
1675 |
2065 |
1675 |
2075 |
1675 |
2085 |
1675 |
2095 |
1675 |
2098 |
Main dimensions GWXQF3/6/9-206F/H/Y-150/300/600(C/P/R/I)
|
NPS(in) |
150Lb |
300Lb |
600Lb |
|||
|
L |
D |
L |
D |
L |
D |
|
|
2" |
178 |
75 |
178 |
80 |
178 |
85 |
|
2.5" |
190 |
85 |
190 |
90 |
190 |
100 |
|
3" |
203 |
95 |
203 |
95 |
203 |
110 |
|
4" |
229 |
120 |
229 |
125 |
229 |
130 |
|
5" |
254 |
145 |
254 |
150 |
254 |
155 |
|
6" |
267 |
175 |
267 |
180 |
267 |
190 |
|
8" |
292 |
235 |
292 |
240 |
292 |
250 |
|
10" |
330 |
285 |
330 |
290 |
330 |
300 |
|
12" |
356 |
340 |
356 |
348 |
356 |
350 |
|
14" |
381 |
400 |
381 |
408 |
381 |
415 |
|
16" |
406 |
445 |
406 |
454 |
406 |
465 |
|
18" |
432 |
495 |
432 |
505 |
432 |
515 |
|
20" |
457 |
550 |
457 |
560 |
457 |
575 |
|
24" |
508 |
655 |
508 |
665 |
508 |
675 |
|
28" |
610 |
755 |
610 |
765 |
610 |
778 |
|
32" |
660 |
855 |
660 |
865 |
660 |
880 |
|
36" |
711 |
955 |
711 |
965 |
711 |
990 |
|
40" |
811 |
1055 |
811 |
1065 |
811 |
1100 |
|
48" |
1015 |
1260 |
1015 |
1270 |
1015 |
1310 |
|
56" |
1080 |
1460 |
1080 |
1470 |
1080 |
1520 |
|
64" |
1300 |
1675 |
1300 |
1685 |
1300 |
1820 |
|
72" |
1500 |
1875 |
1500 |
1885 |
1500 |
2030 |
|
80" |
1675 |
2085 |
1675 |
2095 |
1675 |
2235 |
