chemical valves
4 in-depth engineering guides on chemical valves — specification, selection, testing and procurement.
Everything on chemical valves
Vajra's engineering team has published 4 technical guides covering chemical valves for industrial valve selection, specification, testing and procurement. Browse the full set below.
PTFE and PFA-Lined Valves for Corrosive Service: Selection Guide
For hydrochloric acid, sulphuric acid, chlorine, and other aggressive chemicals, even high alloys can be uneconomic or fail. Fluoropolymer-lined valves put an inert plastic barrier between the corrosive fluid and a standard steel body. This guide covers when to use lined valves, the lining materials, valve types, and the design limits you must respect.
Valve Selection for Acid Service - H₂SO₄, HCl, HNO₃ and Phosphoric Acid
Acid service valves require precise material matching to acid type, concentration, and temperature. A material that works in dilute H₂SO₄ may fail instantly in concentrated HCl. This guide maps the right alloy to each acid.
Valve Selection for Caustic Soda (NaOH) Service - Materials, Grades & Safety
Caustic soda (NaOH) is one of the most widely used industrial chemicals, but it causes caustic SCC in stainless steels at elevated temperatures. This guide maps the right valve material to NaOH concentration and temperature.
How to Specify Industrial Valves for Chemical Service: A Complete Guide
Chemical plants handle some of the most aggressive fluids in any industry - strong acids, chlorinated solvents, caustic solutions, oxidising agents, and toxic gases. Specifying the wrong valve body material, seat, or seal material can lead to catastrophic corrosion, product contamination, or unsafe failure. This guide covers every variable in chemical valve specification.
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