PTFE lined ball valves adopt a sphere with a circular through-hole as the opening and closing component. The sphere rotates around the centerline of the valve body along with the valve stem to realize the opening and closing of the valve. Adopting a special compression molding process ensures a dense and perfect sealing surface. Combined with V-type PTFE packing, the valve achieves zero leakage. The sphere and valve stem are integrally cast, eliminating the risk of the valve stem being pushed out of the pressure-bearing part due to pressure changes and fundamentally ensuring operational safety. With the full plastic lining process, the valve delivers excellent resistance to strong medium corrosion.

PTFE lined ball valves are categorized by actuation types, including manual fluorine lined ball valves, worm gear operated fluorine lined ball valves, pneumatic fluorine lined ball valves and electric fluorine lined ball valves.

Structural Features

Superior Chemical Stability: Ball valves with FEP lining layers exhibit high chemical stability and can be compatible with all strong corrosive media except molten alkali metals and elemental fluorine.

Full Bore & Floating Ball Structure: The valves can achieve leak-free shut-off across the entire pressure range, facilitating unobstructed flow and maintenance of the pipeline system.

Integral Ball & Stem Design: The closure element (ball) and valve stem are cast (or forged) as a single unit, eliminating the possibility of stem ejection from the pressure-bearing components due to pressure fluctuations, and fundamentally ensuring operational safety in engineering applications.

Compact & Leak-Free Construction: The valve body features a compact and rational design with a small inner cavity, reducing medium retention. The sealing surfaces offer excellent tightness, and combined with the herringbone ring PTFE packing assembly, the valves achieve zero leakage.

Two-Piece & Three-Piece Configurations: These structures can adapt to various pipeline systems and operating conditions. Among them, the three-piece ball valve allows separation of the main valve body from the two side valve bodies, enabling quick online replacement and maintenance.

PTFE-Lined Ball Valve Component Materials

PTFE-Lined Ball Valve Performance Specifications

Design & Manufacturing: GB/T 12237-2007 Steel Ball Valves for Petroleum, Petrochemical and Related Industrial Applications

Face-to-Face Dimension: GB/T 12221-2005 Face-to-Face and End-to-End Dimensions of Metal Valves

Flange Standards: GB/T 17241.6, JB/T 79, GB/T 9113, HG/T 20592, HG/T 20615, SH/T 3406, ASME B16.5, etc.

Inspection & Test: HG/T 3704-2003 General Technical Specifications for Fluoroplastic Lined Valves

PTFE-Lined Ball Valve Technical Data

Fluorine lined ball valves are categorized by actuation types, including manual fluorine lined ball valves, worm gear operated fluorine lined ball valves, pneumatic fluorine lined ball valves and electric fluorine lined ball valves.

Basic Models of Fluorine Lined Ball Valves

Application Fields

Fluorine lined ball valves are specially designed for on-off control of various highly corrosive media. They are widely used in petroleum, chemical industry, dyestuff, pesticide, acid-making and alkali-making industries, serving as the optimal choice for anti-corrosion pipelines.

How to Select and Use Fluorine Lined Ball Valves Correctly?

First of all, the medium temperature for fluorine lined ball valves shall not exceed 150°C, which is limited by the temperature resistance of internal FEP (F46) lining. The medium temperature can reach 150°C for short-term service, while the continuous operating temperature should be controlled within 120°C. Excessively high temperature may soften and deform the F46 fluoroplastic lining of valve components, resulting in incomplete valve closure and increased leakage.

If the medium temperature is below 180°C for short-term operation and below 150°C for continuous operation, PFA fluoroplastic lining can be selected as an alternative. Nevertheless, PFA-lined valves come at a higher cost compared with F46-lined versions.

Secondly, fluorine lined ball valves shall be avoided under negative pressure pipeline conditions. Negative pressure will suck or bulge the internal fluoroplastic lining, leading to malfunction during valve opening and closing.

In addition, the process medium shall be free of hard particles, crystals and impurities. Foreign particles will abrade the fluoroplastic lining of ball and seat or PTFE bellows during valve operation. If hard particles, crystals or impurities exist in the medium, Hastelloy rubber lined ball valves for ball and seat assembly can be considered for selection.