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China PTFE Lined Four-Way Factories, Products
Product Description
Core Overview
PTFE Lined Four-Way Fitting is a corrosion-resistant pipe fitting widely used in chemical, pharmaceutical, metallurgical, and environmental protection industries. It features a PTFE lining inside a carbon steel or stainless steel shell, combining the corrosion resistance of PTFE with the mechanical strength of metal, making it ideal for transporting corrosive media such as acids, alkalis, salts, and organic solvents.
Basic Specifications
| Item | Details |
| Product Name | PTFE Lined Four-Way |
| Executive Standards | HG/T 21562, ASME B16.5, GB/T 12224 |
| Nominal Diameter | DN15 – DN300 (1/2" – 12") |
| Pressure Rating | PN10, PN16, PN25, PN40 / Class 150, Class 300 |
| Structure Type | Equal Cross, Reducing Cross |
| Shell Material | Carbon Steel (Q235B, 20#), Stainless Steel (304, 316L) |
| Lining Material | Polytetrafluoroethylene (PTFE) |
| Lining Thickness | 2.0–6.0 mm (Standard: 3.0–4.0 mm) |
| Connection Type | Flanged Connection (RF Raised Face, FM Female Face) |
| Operating Temperature | -20℃ to +180℃ |
| Applicable Medium | Strong acids, strong alkalis, oxits, organic solvents and other highly corrosive media |
| Factory Inspection | Hydrostatic pressure test, Spark pinhole leakage test (5kV) |
| Main Applications | Chemical, petrochemical, pharmaceutical, metallurgy, environmental protection, fluorine chemical, sewage treatment industries |
Typical Dimensions Table
| Nominal Diameter DN | Outer Diameter (mm) | Center-to-End (mm) | Flange Outer Diameter (mm) | Bolt Circle Diameter (mm) | Lining Thickness (mm) |
| 15 | 21.3 | 40 | 90 | 60 | 3.0 |
| 20 | 26.9 | 50 | 100 | 70 | 3.0 |
| 25 | 33.7 | 65 | 115 | 80 | 3.5 |
| 32 | 42.4 | 80 | 140 | 100 | 3.5 |
| 40 | 48.3 | 100 | 150 | 110 | 3.5 |
| 50 | 60.3 | 125 | 165 | 125 | 4.0 |
| 65 | 76.1 | 160 | 185 | 145 | 4.0 |
| 80 | 88.9 | 190 | 200 | 160 | 4.0 |
| 100 | 114.3 | 250 | 220 | 180 | 4.5 |
| 125 | 139.7 | 310 | 250 | 210 | 4.5 |
| 150 | 168.3 | 380 | 285 | 240 | 5.0 |
| 200 | 219.1 | 500 | 340 | 295 | 5.5 |
| 250 | 273.0 | 630 | 405 | 355 | 6.0 |
| 300 | 323.9 | 750 | 460 | 410 | 6.0 |
Core Advantages
| Advantage Category | Specific Content |
| Corrosion Resistance | PTFE lining can resist corrosion from most acids, alkalis, and organic solvents, with a corrosion resistance coefficient of up to 0.99 |
| Low Friction | The friction coefficient of PTFE is only 0.04, which reduces the resistance of fluid transportation and saves energy |
| Temperature Resistance | Can work stably in the temperature range of -200℃ to 260℃, suitable for high and low-temperature environments |
| Non-Stick Property | The surface of PTFE is non-stick, which prevents medium deposition and facilitates cleaning |
| Long Service Life | The service life is 3-5 times longer than that of ordinary pipe fittings, reducing maintenance costs |
Frequently Asked Questions (FAQ)
What media are suitable for PTFE lined four-way fittings?
They are suitable for virtually all chemical fluids including strong acids, strong alkalis, salts, strong oxidizers, and various organic solvents.
What are the standard shell materials used for these fittings?
Standard metal shells are typically manufactured using Carbon Steel (Q235B, 20#) or Stainless Steel grades such as 304 and 316L, providing optimal structural durability.
How is product quality ensured before delivery?
Every fitting undergoes rigorous factory inspections, including a hydrostatic pressure test to confirm shell integrity and a 5kV spark pinhole test to verify lining continuity.
What connection types and flange standards are available?
The fittings feature flanged connections (RF Raised Face, FM Female Face) compatible with international standards including ASME B16.5, HG/T 21562, and GB/T 12224.
What are the working temperature limitations?
The standard operating temperature ranges from -20℃ to +180℃ under normal working conditions, while the PTFE material itself can maintain stability across -200℃ to +260℃.
