English
Español
Deutsch
Français
Русский
العربية
日本語
한국어
Português
Italiano
ไทย
Tiếng Việt
Polski
Türkçe
Bahasa Indonesia
فارسیLined Valve Selection Guide: How to Choose the Right Type, Material & Size for Your Application
Selecting the wrong lined valve costs you unplanned shutdowns, chemical leaks, and wasted budget. This guide walks you through 6 critical selection steps — from valve type and lining material to size, pressure rating, industry fit, and compliance — so you can specify the right valve the first time.
Select the Right Lined Valve Type for Your Function
Lined valves come in 7 primary configurations, each engineered for a specific flow control function. Your first decision is whether you need on/off isolation, throttling control, or backflow prevention.
Valve Type Comparison
| Valve Type | Function | Flow Characteristic | Best For | Limitations | Size |
|---|---|---|---|---|---|
| Lined Plug Valve | On/Off isolation | Full bore, high Cv, low ΔP | Slurries, viscous media, high-flow chemical lines | Higher torque; not for fine throttling | DN15–DN400 |
| Lined Ball Valve | On/Off isolation | Full/reduced bore, bubble-tight | Gas service, high-purity, emergency shutoff | Cavity traps media; not for slurry | DN15–DN600 |
| Lined Butterfly Valve | On/Off & moderate throttle | High capacity, compact, low cost | Large pipelines, water treatment, general chemical | Disc in flow path; not for precise control | DN50–DN3000 |
| Lined Check Valve | Backflow prevention | Uni-directional, auto-closing | Pump discharge, gravity flow, acid dosing | Cannot isolate or throttle | DN15–DN600 |
| Lined Diaphragm Valve | Throttling & on/off | Excellent modulation, zero dead-leg | Slurries, abrasive media, pharma, food | Diaphragm is wear part; limited pressure | DN15–DN300 |
| Lined Gate Valve | On/Off isolation | Full bore, minimal ΔP when open | Main pipeline isolation, infrequent operation | Slow actuation; seat erosion risk | DN25–DN600 |
| Lined Globe Valve | Precision throttling | Excellent regulation, linear characteristic | Flow control, pressure regulation, dosing | Higher ΔP; higher cost | DN15–DN250 |
Quick Selection Recommendations
Not sure which valve type fits your process? Describe your working conditions and our engineers will recommend the best option within 24 hours.
Free ConsultationBrowse YOUFUMI Lined Valve Products
Choose the Right Lining Material — PTFE vs PFA vs FEP vs Rubber
The lining material determines your valve's chemical resistance, temperature range, purity level, and service life. Fluoropolymer linings (PTFE, PFA, FEP) handle the widest range of corrosive chemicals, while rubber linings offer advantages in abrasive or low-cost applications.
Lining Material Comparison
| Property | PTFE | PFA | FEP | PVDF | Rubber |
|---|---|---|---|---|---|
| Temperature | -40 to +200°C | -40 to +260°C | -40 to +150°C | -30 to +150°C | -20 to +120°C |
| Chemical Resistance | Excellent — nearly universal | Excellent — nearly universal | Excellent | Good — weak to strong alkalis | Moderate |
| Permeation | Moderate (microporous) | Low (melt-processable, dense) | Low | Moderate | High |
| Purity | High | Ultra-high (FDA, semiconductor) | High | Medium | Low |
| Abrasion | Moderate | Good | Moderate | Good | Excellent |
| Cost | ★★☆☆ Medium | ★★★★ High | ★★★☆ Med-High | ★★☆☆ Medium | ★☆☆☆ Low |
| Best For | General chemical, chlor-alkali | Semiconductor, pharma, HF | Low-permeation moderate temp | Bromine, chlorinated solvents | Abrasive slurry, water treatment |
Chemical Compatibility Quick Reference
Ratings: A = Excellent | B = Good (limited temp) | C = Not Recommended
| Chemical | PTFE | PFA | FEP | PVDF | Rubber |
|---|---|---|---|---|---|
| Hydrochloric Acid (HCl) | A | A | A | A | B |
| Sulfuric Acid (H₂SO₄) ≤98% | A | A | A | B | C |
| Hydrofluoric Acid (HF) | A | A | B | C | C |
| Sodium Hydroxide (NaOH) | A | A | A | C | B |
| Chlorine Gas (Cl₂) | A | A | A | B | C |
| Nitric Acid (HNO₃) | A | A | A | B | C |
| Acetic Acid | A | A | A | A | B |
| Phosphoric Acid | A | A | A | A | B |
| Bromine (Br₂) | A | A | B | A | C |
| Organic Solvents | A | A | A | B | C |
Determine the Correct Lined Valve Size — DN15 to DN600
Valve sizing directly impacts flow rate, pressure drop, and system efficiency. An oversized valve wastes budget; an undersized one creates excessive pressure drop.
DN / NPS Size Reference
| DN | NPS | Plug | Ball | Butterfly | Check | Diaphragm | Globe |
|---|---|---|---|---|---|---|---|
| DN15 | ½" | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| DN25 | 1" | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| DN50 | 2" | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| DN100 | 4" | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| DN150 | 6" | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| DN200 | 8" | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| DN300 | 12" | ✓ | ✓ | ✓ | ✓ | — | — |
| DN400 | 16" | ✓ | — | ✓ | — | — | — |
| DN600 | 24" | — | — | ✓ | — | — | — |
Flow Coefficient (Cv/Kv) Sizing Guide
Step A: Determine required flow rate (Q) in m³/h or GPM.
Step B: Determine allowable pressure drop (ΔP) across the valve.
Step C: Calculate Kv = Q × √(SG / ΔP). Conversion: Cv = 1.156 × Kv.
Step D: Select a valve with rated Kv ≥ calculated value.
Match Pressure Rating & Temperature Range — PN6 to PN25 / Class 150–300
Every lined valve has a maximum working pressure that decreases as temperature rises. Verify that your operating conditions fall within the pressure-temperature envelope.
Pressure-Temperature Rating (PTFE Lining)
| Pressure Class | Max Pressure (bar) | Max Temp at Full Pressure | Max Temp Reduced Pressure | Flange Std |
|---|---|---|---|---|
| PN6 | 6 | 150°C | 200°C at 3 bar | EN 1092-1 |
| PN10 | 10 | 150°C | 200°C at 5 bar | EN 1092-1 / GB/T 9113 |
| PN16 | 16 | 150°C | 200°C at 8 bar | EN 1092-1 / GB/T 9113 |
| PN25 | 25 | 120°C | 180°C at 10 bar | EN 1092-1 |
| Class 150 | 20 (≈290 psi) | 150°C | 200°C at 10 bar | ASME B16.5 |
| Class 300 | 50 (≈725 psi) | 120°C | 180°C at 25 bar | ASME B16.5 |
PFA-lined valves operate 20–60°C higher than PTFE at the same pressure. Contact YOUFUMI for exact PFA ratings.
Over-temperature: Running PTFE-lined valves above 180°C causes liner softening and seal failure.
Vacuum without reinforcement: Standard linings collapse under negative pressure. Specify vacuum-rated valves if below -0.06 MPa.
Thermal cycling: Rapid temperature swings cause metal/liner differential expansion and delamination.
Need pressure-temperature verification? Send us your process data and our engineers will confirm the correct pressure class.
Verify My SpecChoose by Industry Application — Chemical, Pharma, Semiconductor & More
Different industries impose specific requirements on valve material, certification, purity, and operating conditions.
Chemical Processing
Acid/alkali transfer, reactor feed, neutralization. PTFE-lined plug and butterfly valves.
View Solutions →Pharmaceutical & Biotech
High-purity media, CIP/SIP, FDA-compliant. PFA-lined diaphragm valves preferred.
View Solutions →Semiconductor
Ultra-high-purity wet chemical delivery (HF, H₂SO₄). PFA-lined ball valves.
View Solutions →Chlor-Alkali / Caustic Soda
Chlorine gas, NaOH 50%, HCl 32%. PTFE-lined plug valves with ATEX cert.
View Solutions →Petrochemical
Acid alkylation, sulfuric acid regeneration. PTFE/PFA for severe acid service.
View Solutions →Lithium & New Energy
Battery electrolyte (LiPF₆, HF byproduct). PFA-lined valves for fluorides.
View Solutions →Agrochemical
Herbicide/pesticide production. PTFE-lined for mixed acid/solvent versatility.
View Solutions →Fine Chemical
Specialty synthesis, dye/pigment. Precise throttling with lined globe valves.
View Solutions →Smelting & Mining
Acid leaching, electrolyte circulation. Rubber or PTFE for abrasive slurry.
View Solutions →Electronic Chemicals
High-purity etchants. Zero-contamination PFA-lined valves required.
View Solutions →Coal Chemical
Gas purification, acid recovery. PTFE-lined for mixed acid/alkali environments.
View Solutions →Confirm Compliance Standards — ASME, DIN, JIS, ISO
Verify the valve meets design, testing, and flange standards required by your project and region.
Standards Quick Reference
| Category | Standard | Description |
|---|---|---|
| Design | ASME B16.34 | Flanged, threaded, welding end steel valves |
| Design | DIN 3202 | Face-to-face dimensions (metric) |
| Design | JIS B2011 | Japanese standard for iron valves |
| Testing | ISO 5208 | Valve pressure testing (leakage rates A–D) |
| Testing | API 598 | Valve inspection and testing |
| Flanges | ASME B16.5 | Pipe flanges (NPS ½–24) |
| Flanges | EN 1092-1 | European PN flanges |
| Flanges | GB/T 9113 | Chinese national standard flanges |
| Safety | ATEX (2014/34/EU) | Explosive atmospheres |
| Safety | CE Marking | EU conformity |
YOUFUMI Certifications
Certificates available on our Certification page. Custom test reports and material certificates (3.1 per EN 10204) provided with every shipment.
Why Choose YOUFUMI for Your Lined Valve Supply?
Founded in 1989, Zhejiang Youfumi Group Co., Ltd. is one of China's largest specialized manufacturers of fluoropolymer-lined valves, pipelines, and containers. We are a direct factory — not a trader — giving you transparent pricing, full quality control, and guaranteed production capacity.
Our Manufacturing Capabilities: 150+ CNC lathes, 47 vertical machining centers, 13 horizontal machining centers, 6 large CNC gantry machines, and 13 six-axis robots. Annual production capacity: 650,000 units. Supported by intelligent stereoscopic warehouses and AGV logistics for precision, efficiency, and on-time delivery.
Quality Assurance: Every valve undergoes 30+ inspection procedures from raw material to final delivery. ISO 9001, ISO 45001, ISO 14001, CE, and ATEX certified. We provide full material certificates (EN 10204 3.1) and test reports with every shipment.
Company Address: No. 1-1 Qianjie Street, Yongzhong High-Tech Zone, Longwan District, Wenzhou, Zhejiang, China
See YOUFUMI Lined Valves in Action
Watch our factory tours, product demonstrations, and manufacturing process videos to see the quality and scale of YOUFUMI's production firsthand.
Visit our YouTube channel for more product videos, factory tours, and technical demonstrations. | Company Videos on YOUFUMI.com
Lined Valve Selection Tool
Tell Us About Your Application
Select your chemical medium, temperature, pressure, and pipe size — we'll recommend the ideal valve type and lining material.
Start Selection Consultation →Or call: +86 136 3425 7286
Lined Valve Selection FAQ
Get a Free Lined Valve Selection Consultation
Send us your process parameters and our engineers will provide a complete valve recommendation within 24 hours.
Request a Quote 💬 WhatsApp Us
