Lined Valve - The perfect solution for chemical systems
Currently, industrial valves are increasingly widely used because of their high applicability. And the role of the valves lining industry is paramount in the factories. Choosing industrial liners not only ensures uninterrupted production but also makes factories/factories more efficient as the metal parts of the liner are manufactured from the same materials. more optimal and not to contact directly to the stored material in the course of doing that.
Within the scope of this article, we would like to give you an overview of the popular types of lined valves on the market today.
What is Lined Valve?
A lined valve is a corrosion-resistant valve that is lined inside the van by the type of material data characteristics differentiate. Simply put, the lining material needs to be filled in the valve body where the medium can reach. The lined valve can be used in any medium with a concentration of sulfuric acid, hydrochloric acid, hydrofluoric acid, soluble aqua regia, and various organic acids, strong acids, strong oxidizing agents, and other solid media, but limited at temperature (average -50 ℃ to 150 ℃ ). Valves that can be manufactured with plastic liners include lined butterfly valves, lined ball valves, lined globe valves, lined plug valves, lined gate valves, etc. There are many Teflon materials that can be used for valve linings. The most commonly used materials are FEP (F46) and PTFE (F4), PCTFE (F3), etc ...
Materials |
Working temperature |
Working conditions |
Features |
PTFE ( F4 ) |
-180 ~ 200 ℃ |
Strong acid, base, oxidant, etc |
Excellent chemical stability and corrosion resistance, good electrical insulation, heat resistance, self-lubricity; Corroded by molten alkali metal, low friction coefficient, but poor fluidity, large thermal expansion, need sintering molding instead of injection molding. |
PVC |
0 ~ 55 ℃ |
Resistant to water, alkali, non-oxidizing acid, chain hydrocarbon, oil, and ozone |
High mechanical strength, excellent chemical stability, and electrical conductivity, good aging resistance, easy fusion and bonding, low price. |
FEP ( F46 ) |
-85 ~ 150 ℃ |
Any organic solvents or reagents, dilute or concentrated inorganic acids, bases, ketones, aromatics, chlorinated hydrocarbons, etc.; |
The mechanical and electrical properties and chemical stability are generally similar to F4, but with high dynamic strike toughness and excellent weather resistance and radiation. |
PCTEF(F3) |
-195 ~ 120 ℃ |
Various organic solvents, intangible corrosion fluids (oxidizing acids) |
The heat resistance, electrical property, and chemical stability are next to F4, and the mechanical strength, creep property and hardness are better than F4. |
PVDF ( F2 ) |
-70 ~ 100 ℃ |
Most chemicals and solvents |
Good toughness, easy to form. Tensile strength and compression strength are better than F4 and can withstand bending, radiation, light and aging, etc |
RPP |
-14 ~ 80 ℃ |
An aqueous solution of inorganic salts, dilute or a concentrated solution of an inorganic acid/base; |
One of the lightest plastics. Its yield, tensile and compressive strength, and hardness are better than those of low-pressure polyethylene. Good heat resistance, easy to form, cheap price. Its dynamic impact, fluidity, and bending elastic modulus are improved after modification. |
PO |
-58 ~ 80 ℃ |
Various concentrations of acid, alkali salts, and some organic solvents; |
The most ideal anticorrosive material has been widely used in rotary forming large equipment and pipelining. |
The Popular Types of Lined Valve
Lined butterfly valve:
The Xomox Lined Butterfly Valve is a new line of fluoropolymer-lined valves. Among the benefits it brings, the priority is still to prolong the service life and be safer for the operator, not allowing leakage into the atmosphere. Xomox Lined Butterfly Valves are commonly used in the following industries: Chlo-Alkali, industrial inorganic chemicals, metals and mining, nitrogen and phosphate fertilizers, petroleum refining, pharmaceuticals.
Lined ball valve:
Xomox Ball Valves offer economical solutions for the majority of chemical applications. The low torque of the lined ball valve allows the use of a smaller actuator, reducing costs and saving space. Dynamic joint body design helps maintain pressure boundaries throughout thermal cycles.
Lined Plug Valve:
Corrosion-resistant plug valve, with a breakthrough design, compared to ball valves, a good application for solid fluids, size from DN15-300, maximum temperature resistance of 200 oC. In addition, the plug valve has a full-port flow to ensure the best throughput. Fully lined 2-way, 3-way lined wedge valves feature a revolving plugin a fully lined body. Premium PFA liners handle highly corrosive fluids. Variations in temperature or chemical concentration also have little or no effect on the lining.
Lined One-way Valve:
A one-way valve is a pipeline protection device, allowing liquid-gas flow to pass in only one direction and preventing flow in the opposite direction. A non-return valve is used to protect the equipment of hydraulic circuits such as pipes, pumps, tanks, etc. In addition, the check valve also works to prevent the loss of liquid gas when there is a leak. leaking, damaged pipes. Swing, ball, piston, disc (poppet) check liner valves have a PFA liner as standard liner. With state-of-the-art technology, the PFA liner is rigidly locked into the valve's molded body to increase operational durability, especially in a vacuum environment. Xomox lined check valves provide economical solutions for the majority of chemical industry applications: Chlor-alkali, industrial inorganic chemicals, metals and mining, nitrogen and phosphorus fertilizers, oil refining, medicine. The new XLC line of ball valves is now DIN, ASME compatible with a short or long stem, available in a variety of Seat types for class A and API-598, the best design on the market for flow protection applications reverse.
Daviteq Technologies Inc is currently the official distributor of Crane Group providing industrial-lined valves used for factories, industrial parks, factories, hospitals, etc. use. Customers who need to buy industrial lined valves or want to learn more about lined valves, please contact us via email: info@daviteq.com.
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