PQ940/PQ947 API 598,API6D Large-diameter electric eccentric ball valve
Valve Model: PQ940F, PQ940H
公称直径: DN15～DN300
结构: Eccentric hemispherical core
阀体材质: Cast steel WCB, 不锈钢 304, 不锈钢 316
公称压力: PN10, PN16, PN25, PN40
适用温度: -20℃～450℃
Application Range: Contains fibers, 小固体颗粒, 浆料, and viscous fluids
产品特点: Frictionless opening and closing, long service life, flexible rotation, and wide range of applications.
适用标准:
球阀设计符合 API6D,BS5351，ASME B16.34
面对面 ASME B16.10,AP6D
端部法兰 ASME B16.5/ASME B16.47
对焊端 ASME B16.25
消防安全API607、API6A
检验和试验API 598、API6D
Large-diameter electric eccentric hemispherical valve application scope:
General purpose valve: Reasonably designed and compact in structure, it features low flow resistance, 密封性能好, and easy and flexible operation. It is particularly suitable for low-pressure pipeline networks carrying media such as water, 污水, 蒸汽, and pulp. It can be equipped with electric or pneumatic devices for remote automated operation. (For non-corrosive media such as water, 蒸汽, 污水, 纸浆, and slurry)
Pulverized coal injection valve: An ideal device for controlling the solid conveying of dust-laden gases and particulate fluids, such as pulverized coal injection. It is widely used in various pipeline control systems in blast furnace pulverized coal injection, pulverizing systems, and dust removal systems in metallurgical, mineral processing, and power production processes. It adopts a straight-through structure, ensuring smooth flow and preventing ash accumulation and blockage. The sealing pair is made of Co-Cr-W alloy material and undergoes special heat treatment, making the valve resistant to erosion and wear. The eccentric spherical surface of the valve has automatic compensation performance; by adjusting the bolts on the worm gear, the sealing pair can still achieve a re-sealing effect even under a certain degree of wear. (For dust-laden gases and particulate fluids)
Overview of PQ940/PQ947 API 598,API6D Large-diameter electric eccentric ball valve:
The PQ940F electric eccentric ball valve is a new type of ball valve with a structure similar to a triple eccentric hard-seal butterfly valve. Its opening and closing element is taken from a portion of the ball. During the valve’s opening and closing process, the ball and the valve seat sealing surface no longer contact each other, eliminating friction and jamming, reducing wear on the seals, and significantly extending the valve’s service life. The sealing force on the sealing surface of the electric eccentric ball valve gradually increases; that is, from complete separation to contact between the ball and the valve seat, the sealing pressure gradually increases until a complete seal is achieved, and vice versa. This greatly improves the sealing condition and sealing effect of traditional ball valves.
Features of PQ940/PQ947 API 598,API6D Large-diameter electric eccentric ball valve:
1. This valve is an electric hard-seal ball valve with strong wear resistance and corrosion resistance. Different seat sealing surface materials can be selected according to the medium and operating conditions to achieve different sealing effects.
2. The unique V-shaped notch of the PQ940H electric eccentric ball valve has a special shearing function. During the valve closing process, it can cut off residual impurities in the medium, 使其特别适用于含有纤维的介质, 小固体颗粒, 和浆料.
3. During the opening and closing process, the ball instantly detaches from the valve seat sealing surface, with no contact between them. This reduces friction and wear between the ball and the valve seat, improving the valve’s service life. It also features low torque and flexible rotation.
4. When the ball valve is open or fully closed, the ball and valve seat sealing surfaces are completely isolated from the medium. The medium will not cause erosion of the valve sealing surface during passage.
Electric Eccentric Ball Valve Technical Parameters
公称直径: DN15～DN300 (MM)
公称压力: PN1.0, 1.6, 2.5, 6.4兆帕
连接类型: Wafer type, 法兰连接
结构类型: Eccentric rotary valve
Actuating Range: 0-90 degrees
阀体材质: Carbon steel WCB, 不锈钢 304, 不锈钢 316, 316L
Leakage Rate Q: Soft seal Class VI, Hard seal Class IV
Switching Time: 5 seconds – 30 seconds – 60 seconds (customizable upon request)
流量特性: Approximately equal percentage
Power Supply Voltage: AC220V, AC380V, DC24V (others available upon request)
Action Type: 开/关型 (two-position shut-off), Intelligent regulating type (4～20mA signal control)
Principle of Electric Eccentric Ball Valve
The valve disc of an electric eccentric ball valve is shaped like a hemisphere. The valve disc’s opening and closing stroke is 0-90 degrees. 然而, the rotation center of the valve disc (valve shaft) is eccentric to the center of the valve seat (valve body or pipeline center). This allows the ball to immediately detach from the valve seat sealing surface when the valve is opened or closed, preventing contact or friction and reducing wear. This structural form is very similar to the sealing and movement principle of a triple eccentric butterfly valve. 所以, some people say that the eccentric ball valve is not a ball valve, but more like a butterfly valve with a spherical valve disc.
