PTFE Lined Industrial Chemical Control Valve

PTFE Lined Industrial Chemical Control Valve belongs to automatic regulating pipeline component, different from ordinary on-off lined ball valves. It does not only simply open or shut off fluid, but realizes continuous adjustment of flow rate, pipeline pressure and medium liquid-level for closed chemical production loops. Ordinary metal control valves will be rapidly corroded by aggressive chemical fluid; common PFA-sprayed control valves face coating wear risk under frequent throttling scouring. Our control valve uses full PTFE-lined flow-passing parts including valve body, valve plug and seat. It can cooperate with DCS automatic control system, and matches PTFE-lined pipeline, elbow and tee to build complete anti-corrosion automatic conveying network, widely used in overseas chemical parks’ automated corrosive-medium process projects.

What is PTFE Lined Industrial Chemical Control Valve？

PTFE Lined Industrial Chemical Control Valve is a special corrosion-resistant throttling regulating valve for industrial chemical pipelines. It consists of carbon-steel valve body with full PTFE lining, PTFE-wrapped internal trim (plug, seat), and optional manual / pneumatic / electric actuators. Its core function is continuous throttling regulation: by changing the flow-passing cross-section inside valve body, it dynamically adjusts flow, pressure or back-pressure of corrosive flowing medium. All medium-contact surfaces are fully covered by PTFE material to prevent erosion caused by acid, alkali and fluorine-containing fluid during frequent throttling scouring. It is installed on process piping and linked with industrial control system, belongs to regulating fitting rather than simple cut-off valve, and connects with fluorine-lined piping system by HG20536 full-lined anti-corrosion flanges.

Complete Technical Specification Table

Core Product Advantages

1. Full Wetted-Part PTFE Lining For Throttling Scouring Condition Valve-body, plug and valve-seat are all protected by PTFE lining. It resists continuous medium scouring generated during frequent throttling, solves coating-peeling defect of sprayed-type control valves.

2. Multiple Actuator Configuration For Automated Production Three driving modes: manual, pneumatic, electric. Pneumatic / electric versions can connect with DCS / PLC industrial control system to realize remote automatic regulation for unmanned chemical workshops.

3. Steady Throttling Performance Under Corrosive Medium Optimized flow-path structure reduces turbulent-flow impact inside valve cavity, guarantee stable adjustment linearity under long-term cyclic working condition.

4. Zero-Dead-Angle Lining Structure Valve cavity, medium inlet-outlet and sealing face achieve continuous PTFE cladding; no exposed metal point, avoid crevice corrosion under mixed-medium working condition.

5. Strong System Compatibility Adopt HG20536 unified full-lined flange standard, seamlessly dock with Zhuoyan full-series PTFE-lined pipeline, tees, elbows and process equipment for one-stop procurement.

6. Strict Independent Seat-Tightness Test Apart from conventional spark inspection, every finished control valve carries out special throttling-seat tightness test, to guarantee low-leakage performance under adjustment status.

Main Application Fields

Suitable for automated corrosive-medium chemical process pipelines, with delivery records to Southeast Asia and Middle-East chemical industrial parks:

1. Fine-chemical automatic production line: Flow regulation of mixed acid and organic corrosive fluid

2. Fluorochemical plant: Pressure & flow adjustment for hydrofluoric acid conveying pipeline

3. New-energy lithium industry: Automatic throttling of lithium-salt corrosive raw-material delivery

4. Pharmaceutical chemical workshop: Precise flow control of high-purity corrosive intermediate

5. Environmental-protection waste-liquid station: Corrosive waste-acid / waste-alkali discharging flow adjustment

6. Rectification process supporting: Back-pressure adjustment for distillation-column outlet corrosive condensate pipeline

Standard Production Process

1. Carbon-steel valve-body precision machining, remove burrs on inner cavity and flange sealing face.

2. Inner-cavity Sa2.5 grade sandblasting treatment, improve adhesive strength for PTFE lining material.

3. Sodium-activation treatment for PTFE raw-material; implement vacuum pasting for valve-body, plug and seat components respectively in clean workshop.

4. Precision assembly of lined trim (plug, seat) and actuator; debug mechanical stroke and throttling travel.

5. Multi-item inspection: 10KV full-cavity spark scanning test; special valve-seat tightness throttling simulation test; hydraulic pressure holding test.

6. Stroke re-calibration for pneumatic / electric actuator; clean valve inner cavity.

7. Flange ports protected by dedicated PTFE anti-scratch caps; shock-absorbing packaging for finished-valve export shipment.

FAQ

Q1: What is the difference between PTFE lined control valve and ordinary lined ball valve? A: This is a throttling regulating valve for continuous adjustment of flow / pressure; ordinary ball valve is only used for full-open / full-close on-off cut-off, cannot realize stepless regulation.

Q2: Can this PTFE Lined Industrial Chemical Control Valve connect with DCS automatic control system? A: Pneumatic and electric actuator versions support signal connection with DCS / PLC system for remote automatic throttling regulation.

Q3: Is this control valve applicable for hydrofluoric-acid-containing scouring medium? A: Select upgraded 3 mm thickened PTFE lining version for fluorine-containing scouring medium, please inform medium composition in advance.

Q4: What special inspections will each control valve pass before delivery? A: Every valve undergoes spark leakage test, independent valve-seat throttling tightness test and hydraulic pressure holding test.

Q5: Can this control valve be directly matched with existing PTFE-lined piping system? A: It follows HG20536 unified full-lined flange standard, directly compatible with our full-series fluorine-lined pipe fittings and process equipment.

Q6: What is the warranty scope for lined control valve? A: Carbon-steel valve-body enjoys 10-year structural warranty; PTFE lining 5-year warranty; actuator accessories 2-year warranty, exclude artificial scratch and mis-operation damage.