Active Member
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[China]
Address: No.1675, Fengxiang Road, Baoshan City Industrial Zone, Baoshan District, Shanghai, China
Contact name:Olivia
Kata Valve (Group) Co., Ltd. |
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WCB Trunnion Mounted Ball Valve for throttling Flow with RF Flanged Connection
| Pressure stage | Size | Dimensions (mm) | weight (kg) | |||||
| DN | NPS | L | d | W | H | |||
| RF | RTJ | Hand wheel | Hand wheel | Hand wheel | ||||
| Class 150 | 15 | 1/2 | 108 | 119 | 14 | 140 | 85 | 3 |
| 20 | 3/4 | 117 | 130 | 19 | 140 | 90 | 4 | |
| 25 | 1 | 127 | 140 | 25 | 150 | 99 | 5 | |
| 32 | 1 1/4 | 140 | 153 | 32 | 180 | 105 | 7 | |
| 40 | 1 1/2 | 165 | 178 | 38 | 200 | 126 | 8 | |
| 50 | 2 | 178 | 191 | 51 | 250 | 140 | 12 | |
| 65 | 2 1/2 | 190 | 203 | 64 | 300 | 165 | 18 | |
| 80 | 3 | 203 | 216 | 76 | 350 | 178 | 24 | |
| 100 | 4 | 229 | 242 | 102 | 500 | 230 | 38 | |
| 125 | 5 | 356 | 369 | 127 | 800 | 280 | 60 | |
| 150 | 6 | 394 | 407 | 152 | 800 | 310 | 82 | |
| 200 | 8 | 457 | 470 | 203 | 1000 | 350 | 145 | |
| 250 | 10 | 533 | 546 | 254 | ----- | ----- | ----- | |
A ball valve is a form of quarter-turn valve which uses a hollow, perforated and pivoting ball to control flow through it. It is open when the ball's hole is in line with the flow and closed when it is pivoted 90-degrees by the valve handle.The handle lies flat in alignment with the flow when open, and is perpendicular to it when closed, making for easy visual confirmation of the valve's status.
Ball valves are durable, performing well after many cycles, and reliable, closing securely even after long periods of disuse. These qualities make them an excellent choice for shutoff and control applications, where they are often preferred to gate and globe valves, but they lack their fine control in throttling applications.
The ball valve's ease of operation, repair, and versatility lend it to extensive industrial use, supporting pressures up to 1000 bar and temperatures up to 752 °F (500 °C), depending on design and materials used. Sizes typically range from 0.2 to 48 inches (0.5 cm to 121 cm). Valve bodies are made ofmetal,plastic, or metal with a ceramic; floating balls are often chrome plated for durability. One disadvantage of a ball valve is that they trap water in the center cavity while in the closed position. In the event of a freeze, the sides can crack due to expansion of ice forming. Some means of insulation or heat tape in this situation will usually prevent damage.Another option for cold climates is the "freeze tolerant ball valve". This style of ball valve incorporates a freeze plug in the side so in the event of a freeze up, the freeze plug ruptures, (acts as a sacrificial disk), thus making for an easy repair. Now instead of replacing the whole valve, just screw in a new freeze plug.
In the case that a ball valve is used for cryogenics or product that may expand inside of the ball, there is a vent drilled into the upstream side of the valve. This is referred to as a vented ball. Safety is the number one concern when engineers specify a vented ball.
Quality assurance system
1.Sclerometer
2.Universeal material testing machine
3.High speed analyzer
4.Chemical test
5.Electric analysis scales
6.Nde mt (magnetic powder) inspection
NDE UT (ultasonic) inspection
NDE PT (penetrate) inspecion
PMI spectrum analysis
Hydraulic pressure test
Cryogenic ball valve test
Fire-safe test
Certification
Our major products
Exporting is the dominant operation at Kaitai.In the process of
KATA brand promotion and building up our distribution channels over
the years and now has many satisfied and loyal customers.KATA is
well recognized and its products are widely used in the oil and gas
industry,power plant,boiler,metallurgy,pressure vessel,water supply
and drainage and etc.
