ZPL180F Lined Rising-Stem and ZPL170F Lined Lowering-Stem Discharge Valves are specifically designed for bottom discharge applications in reaction vessels, storage tanks, and other containers. Conventional fluoropolymer-lined ball-type discharge valves often fail to meet the demands of extreme conditions involving strong erosion, easy crystallization, and high flow resistance.
The ZPL180F Rising-Stem Valve features a simplified structure with an extended valve seat reaching the vessel bottom plane. Its conical plug sealing mechanism, coupled with bottom flange mounting. completely eliminates residual media accumulation at container outlets. All wetted surfaces- including the valve interior and internals are lined with high-temperature molded fluoropolymers (FEP/F46 and PFA), creating a complete corrosion barrier between aggressive media and metallic components. With Excellent sealing, fast actuation, and precise flow control, these valves achieve reliable on/off control when paired with pneumatic actuators, solenoids, and limit switches. Ideal for handling acids, alkalis, salts, and other highly corrosive media.
●Rising-Stem Type (ZPL180F):
Resists flow resistance/scaling/erosion/clogging. Not suitable for high vacuum conditions
●Lowering-Stem Type (ZPL170F):
Handles high vacuum conditions, Moderate resistance capability
※Selection Guide:
Users should consider: Pressure differential/Temperature /Media state/Installation orientation /Leakage requirements
| Body Type | Straight-Through Type | |||
| Size | DN15~DN350 | |||
| D&M Std. | IEC 60534 | |||
| PT&I Std. | GB/T13927, API598 | |||
| Conn.Std. | Flange Sealing Face | RF Type, FM/M Type, T/G Type, FF Type | ||
| HG/T20592 | PN10, PN16, PN25 | |||
| ASME B16.5 | 150LB | |||
| Sealing Type | Seat Type | Soft Seat | ||
| Stem Sealing Type | Packing Sealing | |||
| Materials | Body/Bonnet Material | WCB, LCB, SS304, SS316L | ||
| Plug Material | WCB, F304, F316L | |||
| Stem Material | 17-4PH | |||
| Lining Material | FEP(F46),PTFE(F4)PFA | |||
| Packing Material | PTFE | |||
| Technical Parameters |
Temperature Range |
FEP/F46 | -30℃~+120℃ | Acids, Alkalis, Salts, and highly corrosive media |
| PTFE/F4 | -30℃+150℃ | |||
| PFA | 60℃~+180℃ | |||
| Flow Characteristic | Equal percentage (EQ%) / Linear (LIN) / Quick opening(QO) | |||
| Leakage Level | IEC 60534-4, ANSI FCI 70-2, ASME B16.104 | |||
| Rangeability | 100:1 | |||
| Basic Error | w/pos.: ≤±2% | |||
| Hysteresis Error | w/pos.: ≤2% | |||
| Accessories | Actuator | Pneumatic Actuator ZP6000 Series | ||
| Electric Actuator ZP9000 Series | ||||
| Main Accessories | Solenoid Valve, Limit Switch, Positioner, Air Filter Regulator | |||
| Others | Manual Mechanism, Dump Valve, Air-Controlled, ValveLock-up valve | |||
| Flange, Gasket, Bolt | ||||
| Features | Description |
| Superior Corrosion Resistance | V-groove reinforced full lined flow path with compression-molded internals blocks corrosive media |
| Insert-Guiding Structure | This Design enables flush mounting between the valve seal and vessel bottom, effectively reducing stroke while preventing material accumulation |
| Multi-Application | Universal body structure accommodates both rising stem and lowering stem configurations for flexible application scenarios |
| High-Rigidity Plug & Stem | Forged-welded plug & stem assembly maintains structural rigidity to prevent stem deflection under maximum thrust load |
| Adhesion Guarantee | The perforated reinforcement pattern on seat & plug enhances fluoropolymer-metal interfacial bonding. Achieving tight sealing performance |
| Reliable Sealing Performance | Daikin TFM-1600 seats & V-packing for superior sealing with low torque, Dual O-rings for leak-proof reliability. |
| Vacuum-Optimized Design | The dual-pressure system combines a single-acting spring mechanism with pneumatic assist to prevent seal leakage under vacuum conditions |
| Aluminum Housing Actuator | The actuator housing is made of aluminum alloy, achieving significant weight reduction to alleviate load-bearing stress at vessel mounting interfaces while ensuring excellent corrosion resistance |
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