Camflex-type pneumatic eccentric rotary control valve — the workhorse for slurry, coking and high-torque services where conventional globe valves fail early.
Eccentric rotary valve on the test bench — actuator stroking and flange inspection before delivery.
Data from the official Dacheng product datasheet. Custom configurations available on request.
| Series / Type | ZSPF — pneumatic eccentric rotary plug control valve; ZSNF series (camflex / cam-deflection type) |
|---|---|
| Nominal size | DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150 … DN400 |
| Pressure rating | PN 6.4 MPa (Class 600 level) |
| Flange standard | JB/T79-94 / ANSI B16.5 |
| Flow capacity | Kv 12 – 3130 (depending on size and trim) |
| Flow characteristic | Equal percentage, high rangeability |
| Temperature range | -40 ℃ ~ +250 ℃ (standard); -40 ℃ ~ +450 ℃ (high-temperature type) |
| Body material | WCB / CF8M / ZG1Cr18Ni9Ti (other alloys on request) |
| Plug / trim | Eccentric cam plug, Stellite (司太立) hard-facing overlay |
| Seat leakage | Per GB/T 4213-2008 leakage classes |
| Actuator | Multi-spring diaphragm pneumatic actuator, positioner-ready |
The cam core moves away from the seat before rotation starts — no scraping during stroke, dramatically lower seat wear in abrasive and coking media.
Full-bore-like flow path delivers high Kv per size, often allowing one size down versus single-seated globe valves.
Eccentric cam action presses the plug onto the seat at the end of travel, achieving tight shutoff with low actuator demand.
Conventional camflex-type series typically jump straight from DN25 to DN40 and skip intermediate bores. Dacheng manufactures DN32, DN65 and DN125 as standard, so your sizing lands exactly where the process needs it — no compromised oversizing.
Corrosive and polymerizing media, hydrogen chloride and chlorine-related services, reactor feed and recycle control.
Coal-chemical slurry lines, residue and catalyst-containing streams where globe trims plug or erode quickly.
Steam and condensate regulation, feedwater bypass, desuperheating water control.
Drop-in technical equivalent solutions for existing international-brand eccentric rotary installations — sizing verified case by case by our engineers.
Send medium, pressure, temperature and flow — we reply with a verified proposal.
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