Valve for Chemical Processing Industry

Chemical process plants need Valve capable of handling corrosive liquids, corrosive gases, acids, alkalis, solvents, and other reactive process media. Speciality Valve provides corrosion-resistant valve solutions for chemical transfer, isolation, throttling, dosing and process control. Compatibility of materials is considered on the basis of liquid concentration, temperature, pressure, and the wetted parts of the valve.

Which Valve is Used in the Chemical Processing Industry?

Common chemical process valve include:

• Ball Valve – Fast shut-off in process and transfer pipelines

• Plug Valve – Isolation and diversion of aggressive or viscous fluids

• Globe Valve – Throttling and controlled flow adjustment

• Control Valve – Flow, pressure, level and temperature regulation

• Diaphragm Valve – Isolation of compatible corrosive fluids

• Butterfly Valve – Compact isolation in larger chemical pipelines

• Check Valve – Reverse-flow protection

• Bellow Seal Globe Valve – Selected where stem leakage control is important

• Safety Valve – Process-equipment overpressure protection

Chemical Compatibility Comes Before Material Selection:

A valve cannot be selected from the chemical name alone.

Engineers should confirm:

• Acid or alkali concentration

• Operating temperature

• Process pressure

• Chloride level

• Solids content

• Fluid velocity

• Oxidizing conditions

• Cleaning chemicals

• Required leakage performance

Corrosion-Resistant Valve Materials:

Depending on process conditions, material options may include:

• Alloy 20 Valve – Commonly selected for sulphuric acid and other compatible chemical services

• Hastelloy C276/B3 Valve – Used for highly corrosive acids and aggressive chemical media

• Titanium Valve – Suitable for chlorides, oxidizing environments and selected chemical processes

• Zirconium Valve – Used for severe corrosive chemical applications where conventional alloys may be unsuitable

• F317L Valve – Provides enhanced resistance in selected acidic and chloride-containing media

• F44 Valve – Suitable for aggressive chloride-bearing environments

• Inconel Valve – Used where corrosion resistance is required at elevated temperature

• Incoloy Valve – Suitable for combined heat and corrosion exposure

• Monel Valve – Selected for certain acids, alkalis and corrosive chemical duties

Chemical compatibility should always be confirmed using actual concentration, temperature and process conditions rather than selecting a material from the chemical name alone.

Chemical Processing Applications:

• Reactor feed lines

• Acid-transfer pipelines

• Alkali and caustic service

• Solvent transfer

• Chemical storage tanks

• Dosing and injection

• Heat exchangers

• Neutralization systems

• Pump discharge

• Process skids

• Corrosive wastewater

Chemical Valve Standards and Testing:

Depending on valve design and project specification, requirements may include:

• ASME B16.34

• API 598

• ISO 5208

• ISO 15848 for fugitive emissions where specified

Inspection can include shell pressure, seat leakage, material verification, functional operation and actuator checks.

Speciality Valve designs chemical process Valve using the actual characteristics of fluid such as composition, concentration, pressure and temperature. Body material, lining, seat, trim and automation of the valve can be customized to suit corrosive chemical lines and process plants among others.