PQ940/PQ947 API 598,API6D Large-diameter electric eccentric ball valve
Valve Model: PQ940F, PQ940H
Nenndurchmesser: DN15 ~ DN300
Struktur: Eccentric hemispherical core
Ventilkörpermaterial: Cast steel WCB, Edelstahl 304, Edelstahl 316
Nenndruck: PN10, PN16, PN25, PN40
Anwendbare Temperatur: -20℃～450℃
Application Range: Contains fibers, kleine feste Partikel, Schlämme, and viscous fluids
Product Features: Frictionless opening and closing, long service life, flexible rotation, and wide range of applications.
Applicable Standards:
Ball Valve design according to API6D,BS5351,ASME B16.34
Face to face ASME B16.10,AP6D
End Flanges ASME B16.5/ASME B16.47
Butt welded ends ASME B16.25
Fire Safety API607,API6A
Inspection and test API 598,API6D
Large-diameter electric eccentric hemispherical valve application scope:
General purpose valve: Angemessenes Design und kompakte Struktur, es zeichnet sich durch einen geringen Strömungswiderstand aus, gute Dichtleistung, und einfache und flexible Bedienung. It is particularly suitable for low-pressure pipeline networks carrying media such as water, Abwasser, Dampf, und Fruchtfleisch. Es kann mit elektrischen oder pneumatischen Geräten für den automatisierten Fernbetrieb ausgestattet werden. (Für nicht korrosive Medien wie Wasser, Dampf, Abwasser, Fruchtfleisch, und Gülle)
Pulverized coal injection valve: Ein ideales Gerät zur Steuerung der Feststoffförderung von staubhaltigen Gasen und Partikelflüssigkeiten, wie z. B. die Einspritzung von Kohlenstaub. It is widely used in various pipeline control systems in blast furnace pulverized coal injection, Pulverisierungssysteme, und Staubentfernungssysteme in der Metallurgie, Mineralverarbeitung, und Energieerzeugungsprozesse. Es nimmt eine geradlinige Struktur an, Gewährleistung eines reibungslosen Durchflusses und Vermeidung von Ascheansammlungen und Verstopfungen. Das Dichtungspaar besteht aus einem Co-Cr-W-Legierungsmaterial und wird einer speziellen Wärmebehandlung unterzogen, Dadurch wird das Ventil widerstandsfähiger gegen Erosion und Verschleiß. Die exzentrische Kugeloberfläche des Ventils verfügt über eine automatische Kompensationsleistung; durch Einstellen der Schrauben am Schneckengetriebe, Das Dichtungspaar kann auch bei einem gewissen Verschleiß noch eine Nachdichtwirkung erzielen. (Für staubhaltige Gase und partikelförmige Flüssigkeiten)
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, Dadurch ist es besonders für faserhaltige Medien geeignet, kleine feste Partikel, und Schlämme.
3. Während des Öffnungs- und Schließvorgangs, 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
Nenndurchmesser: DN15 ~ DN300 (MM)
Nenndruck: PN1.0, 1.6, 2.5, 6.4MPa
Verbindungstyp: Wafer type, Flanschverbindung
Strukturtyp: Eccentric rotary valve
Actuating Range: 0-90 Grad
Ventilkörpermaterial: Carbon steel WCB, Edelstahl 304, Edelstahl 316, 316L
Leakage Rate Q: Soft seal Class VI, Hard seal Class IV
Switching Time: 5 seconds – 30 seconds – 60 seconds (customizable upon request)
Strömungseigenschaften: Approximately equal percentage
Stromversorgungsspannung: AC220V, AC380V, DC24V (others available upon request)
Action Type: On/off type (Zwei-Positionen-Abschaltung), 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 Grad. Jedoch, 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. daher, some people say that the eccentric ball valve is not a ball valve, but more like a butterfly valve with a spherical valve disc.
