CNS Pneumatic floating ball valve

CNS Pneumatic floating ball valve

Product model: Q641F

Nominal diameter: DN15-300mm

Nominal pressure: PN1.6-6.4MPa

Applicable temperature: -28℃- 300℃

Body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti

Applicable medium: steam, water, nitric acid, acetic acid


Product Design Features 

Serial floating ball valves are mainly applied to natural gas,oil products,chemical engineering, metallurgy,city building,environment protection,pharmacy and food industries,among which the anti-sulphur series are used for long delivery pipes of natural gas that contains hydrogen sulphide medium,a lot of impurity and corrosive substances.


The main structure features include:

1.Specific Sealing Structure of Valve Base

Double cant elastic seal ring or V-shaped groove seal ring structural design is adopted to ensure sealing reliability.As for Iow-pressureo,ultralow pressure or vacuum-operated ball valves,a plate spring-loaded sealing structure of valve base is adopted to ensure

their longterm sealing reliability.As for moderate or high temperature ball valves,para-position polyphenylene or mental can be adopted for valve base material.


2.Automatic pressure relief structure

When the pressure in cloaca cavity increases singularly,the cavity medium can push valve base by its own thrusting force,which results in automatic pressure relief and valve security assurance.


3.Reliable Sealing of Valve Rod

The valve rod adopts downward installation structure with back sealing.The sealing force will increase together with the heig-htening of medium pressure,which can ensure the sealing reliability.Moreover,even if the pressure in valve cavity increases singularly,the valve

rod will not burst out.


4.Fire-resistant Structure

According to the operating condition and users requirement,ball valve can be designed with a fire resistant structure up to the fire-resistant standards of API607,API 6FA and JB/T6899.Once the soft seal ring is burnt out on fire,the structure can avoid serious leaking of  the medium and prevent the fire from scaling up.


5.Anti-static Structure

While operating the valve,the friction between the sphere and the base will produce static charges accumulating on the sphere.To avoid static sparkle,the fire-resistant device is designed to derive the accumulated static sparkle,charges from the sphere.


6.Locking Device

Alocking structure is designed on the full-open and full-close spots of manual ball valves to avoid abnormal open-and-close pro-duced by misoperation or unpredictable circuit vibration.On production lines of petroleum and chemicals of flammable mediums,and during

the course of outdoor piping,the design is especially advantageous and practical.


7.Full Bore Structure and Reduced Bore Structure

The two structure series are produced to meet different requirements of users.The passage inside diameter of full diameter ball valves is the same as that of valve pipe,which is convenient for pipe cleaning.The weight of retractive diameter ball valves is relatively lighter,but the fluid resistance is just 1/7 that of stop valves with the same caliber.Therefore,the application prospects of retractive diameter series is much better.



Main External Connection Dimensions

DN(mm) Size Flange Size
PN1.6MPa PN2.5MPa
L H H1 L1 D D1 D2 n-φd D D1 D2 n-φd
15 130 185 / 140 95 65 46 4-14 95 65 46 4-14
20 140 191 / 140 105 75 45 4-14 105 75 56 4-14
25 150 193 / 140 115 85 65 4-14 115 85 65 4-14
32 165 212 / 164 140 100 76 4-18 140 100 76 4-18
40 180 217 / 164 150 110 84 4-18 150 110 84 4-18
50 200 260 102 190 165 125 99 4-18 165 125 99 4-18
65 220 293 114 210 185 145 118 4-18 185 145 118 8-18
80 250 323 127 247 200 160 132 8-18 200 160 132 8-18
100 280 382 152 276 220 180 156 8-18 235 190 156 8-22
125 320 468 184 348 250 210 184 8-18 270 220 184 8-26
150 360 510 219 378 285 240 211 8-22 300 250 211 8-26
200 400 655 273 524 340 295 266 12-22 360 310 274 12-26
250 630 / 360 / 405 355 319 12-26 425 370 330 12-30
300 750 / 395 / 460 410 370 12-26 485 430 389 16-30