The ZPR770Y eccentric rotary control ball valve (C-type/camflex valve) features a straight-through flow design with an eccentrically rotating spherical disc for low resistance and self-cleaning.
Product Overview
Opening: Disc lifts off seat at 3° (0.05mm gap), reducing wear and torque.
Closing: Progressive wiping action (0 °- 3 °) enhances sealing.
90° rotation: Disc shifts sideways to avoid direct flow impact. Ideal for slurries, powders, and corrosive media due to wide rangeability and stable torque.
Working Principle: A sector-shaped ball rotates eccentrically, with its spherical crown tangentially contacting the seat.
Opening: The ball disengages from the seat.
Closing: The ball gradually presses against the seat, creating sealing force.
Specifications
| Size | DN25~DN300 |
| Pressure | PN16, PN25, PN40, PN64, PN100, 150LB, 300LB, 600LB |
| Conn. Std. | HG/T20592, ANSI B16.5 |
| Temp.Range | -196°C~420°C |
| F.C. | Equal percentage(EQ%) / Quick opening(QO) |
| Matching Actuator | Pneumatic Actuator, Electric Actuator |
| D&M Std. | GB/T4213 |
| F2F Std. | GB/T12221 |
| PT&I Std. | GB/T 4213 GB/T 17213.4 |
| ASME B16.104 IS0 5208 | |
| Accessories | Solenoid Valve, Limit Switch, Filter, Positioner |
| Features | Description |
| One-Piece Body | Monobloc body design with integral wafer/flange connections, offering superior rigidity to prevent deformation and external leakage. |
| Self-Centering Structure | The seat sealing surface and ball feature self-centering capability, facilitating routine maintenance. |
| Trunnion-Mounted Ball | The trunnion-mounted ball design resolves centering, positioning, and erosion protection issues for the stem-disc assembly. Suitable for high-purity media applications. |
| Flat Sealing System | A precision-machined flat metal-to-metal seal between the seat and body replaces traditional gaskets, forming a rigid sealing structure. |
| Shape-Memory Alloys Seat | The shape-memory alloy seat (elastic seat) achieves bidirectional high-pressure sealing while compensating for disc/seat wear, featuring self-cleaning and shearing capabilities during shut-off. |
| Superior Sealing | The ball and seat surfaces are hardfaced with Stellite or other wear-resistant alloys, delivering superior abrasion resistance. |
| Standard Mounting Platform | Design with deep packing box and cast bracket isolates actuator from body heat, maintaining ISO 5211 compliance for universal pneumatic/electric actuator compatibility. |
Downloads
Control Valve Brochure
Application & Case
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