Custom PTFE Lined Reducer Products, Service

Brand: Ruitu Automation

Product origin: China

Type: Transition fitting for connecting pipes of different diameters, with a conical structure and flanged connections.

Application: Used to connect pipes of different diameters for smooth fluid transition and to avoid sudden changes in flow velocity.

Advantages: The conical transition structure ensures stable fluid delivery; the PTFE lining provides corrosion resistance, while the metal outer layer offers structural support, making it suitable for conveying corrosive media.

Product Description

Core Overview

PTFE Lined Reducer 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 (Polytetrafluoroethylene) Lined Reducer
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 Concentric Reducer, Eccentric Reducer
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, salts, 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 (Large×Small) DN Outer Diameter (mm) Length (mm) Flange Outer Diameter (mm) Bolt Circle Diameter (mm) Lining Thickness (mm)
25×15 33.7×21.3 100 115/90 80/60 3.0
32×25 42.4×33.7 120 140/115 100/80 3.5
40×25 48.3×33.7 130 150/115 110/80 3.5
40×32 48.3×42.4 130 150/140 110/100 3.5
50×32 60.3×42.4 150 165/140 125/100 4.0
50×40 60.3×48.3 150 165/150 125/110 4.0
65×50 76.1×60.3 180 185/165 145/125 4.0
80×50 88.9×60.3 200 200/165 160/125 4.0
80×65 88.9×76.1 200 200/185 160/145 4.0
100×65 114.3×76.1 220 220/185 180/145 4.5
100×80 114.3×88.9 220 220/200 180/160 4.5
150×100 168.3×114.3 280 285/220 240/180 5.0
200×150 219.1×168.3 340 340/285 295/240 5.5
250×200 273.0×219.1 400 405/340 355/295 6.0
300×250 323.9×273.0 450 460/405 410/355 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 types of PTFE lined reducers are available?
They are available in two main structural types: Concentric Reducers (where the center lines of both ends align) and Eccentric Reducers (where the center lines are offset), accommodating different pipeline layout requirements.
What shell materials can be paired with the PTFE lining?
Standard shells are manufactured from Carbon Steel (such as Q235B, 20#) or Stainless Steel (such as 304, 316L) to provide optimal structural strength based on external operating conditions.
What tests are conducted before the reducers leave the factory?
Each unit undergoes rigorous factory inspections, including hydrostatic pressure testing to verify mechanical integrity and a 5kV spark pinhole leakage test to ensure lining continuity and defect-free performance.
What is the standard lining thickness for these reducers?
The lining thickness typically ranges from 2.0 mm to 6.0 mm, with standard production sizes utilizing a thickness between 3.0 mm and 4.0 mm depending on nominal pipe diameter.
What medium are PTFE lined reducers suitable for transporting?
They are engineered specifically to transport highly aggressive fluids, including strong acids, strong alkalis, salts, and various harsh organic solvents across chemical and processing systems.

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