Motorized Ptfe Pfa Lined Globe Valves
- Place of Origin:
- Wenzhou,China
- Packing:
- Suitable Packing for Sea/Air Transport
- Connection:
- Flange
- Pressure:
- PN10,PN16,150LBS
- Temperature:
- PTFE:-29℃ ~180℃, PFA:-29℃~200℃, FEP:-29℃~150℃
A lined globe valve regulates corrosive process streams while shielding ductile metallic bodies against destructive chemical attack. Utilizing a linear stem trim and an impermeable fluoropolymer layer, this valve achieves ANSI FCI 70-2 Class VI bubble-tight shutoff inside lines conveying boiling hydrochloric acid, concentrated sulfuric acid, and wet chlorine gas. Chemical plants install this assembly to eliminate pitting corrosion without purchasing expensive high-nickel alloys.
Velocity Attenuation and Micro-Throttling Stability
Internal flow paths route fluid across an S-shaped contour to dissipate kinetic velocity before media passes the orifice.
In chemical metering loops, a ptfe lined globe valve prevents seat washing and cavity erosion under continuous fine-increment regulation. Thick molded polymer dampens cavitation impingement near the vena contracta, preserving plug geometry and linear flow characteristics during high-pressure drops.
Fluoroplastic Polymer Selection for Harsh Media Handling
| Lining Material Grade | Maximum Process Temperature | Sub-Atmospheric Rating | Media Suitability |
|---|---|---|---|
| Virgin Compression Resin | 180°C | Moderate vacuum (-0.5 bar) | Aqueous mineral acids, aggressive caustic lyes |
| High-Purity Melt-Processable Polymer | 200°C | Absolute vacuum (0.1 mbar) | Wet halogens, fuming nitric acid, chlorinated organics |
| Standard Copolymer Formulation | 150°C | Positive gage pressure | Pickling bath liquors, diluted mineral washings |
Bellows Stem Containment for Zero Fugitive Emissions
Stem leakage introduces severe toxic hazards when routing hazardous liquids. A pfa lined globe valve integrates multi-convolution fluoropolymer bellows assemblies backed with secondary chevron packing rings.
Machined dovetail grooves cast directly into the ductile iron shell secure the internal liner against wall surfaces. This mechanical retention stops liner collapse and prevents delamination during thermal shock cycles or line vacuum conditions.
Modulating Electric Actuator Integration and Loop Control
Automated dosing systems require precise digital positioning without instrument air lines. Equipping pfa lined globe valves with intelligent multi-turn electric actuators provides direct stem coupling, optical travel feedback, and fail-safe mechanical spring resets.
Modulating input signals regulate stroke positioning down to micro-increments, maintaining tight shutoff and leak-free chemical containment during demanding continuous processing operations.
Product Parameter
Materials of Main Parts
| No. | Part Name | Material List | ||
| 1 | Body/Bonnet | HT250 | WCB | CF8 |
| 2 | Disc/Stem | 35 | 1Cr13 | 1Cr18Ni19 |
| 3 | Lining/Seat | PCTFE(F3) PTFE(F4) FEP(F46) PFA PO | ||
| 4 | Packing | PTFE(F4) | ||
| 5 | Packing Gland | WCB | WCB | CF8 |
| 6 | Handwheel | HT200 | HT200 | WCC |
Technical Specification
| Design & Manufacture Standard | GB/T 12233 | BS 5160 | ||
| Face-to-face Dimension Standard | GB/T 12221 | BS 5160 | ||
| Flange Standard | HG/T 20592 | ASME B16.5 | ||
| Inspection and Test Standard | GB/T 13927 | API 598 | ||
| Nominal Pressure | 1.0MPa | 1.6Mpa | 150LB | |
| Test Pressure | Shell Test | 1.5MPa | 1.5MPa | 1.5MPa |
| High Pressure Sealing | 1.1MPa | 1.1MPa | 1.1MPa | |
| Low Pressure Sealing | 0.6MPa | 0.6MPa | 0.6MPa | |
| Temperature Range | PFA:-29℃~200℃ PTFE:-29℃~180℃ FEP:-29℃~150℃ | |||
| Applicable Medium | Strong corrosive medium i.e.hydrochloric acid,Nitric acid,Hydrofluoric acid,Liquid chlorine,Sulfuric acid and Aqua regia etc. | |||
| Note:Test standard refers to general valve standard,high pressure should be customized for processing. | ||||
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