Valves for the Sulfur Recovery Unit (SRU)
Converts H2S-rich acid gas into elemental sulfur via the Claus process. High-temperature reaction furnace plus molten-sulfur handling gives this unit two distinct, demanding valve environments in one train.
What are the critical valves in a Sulfur Recovery Unit?
Molten sulfur draw-off (Gate Valves) — Steam-jacketed, full-bore valves to prevent sulfur solidification and plugging. Acid gas feed isolation (Ball Valves) — Sour-service isolation ahead of the reaction furnace. Tail gas incineration line (Butterfly Valves) — Large-bore isolation to the thermal oxidiser / incinerator.
Critical Valve Points
Molten sulfur draw-off
Gate Valves →Steam-jacketed, full-bore valves to prevent sulfur solidification and plugging.
Acid gas feed isolation
Ball Valves →Sour-service isolation ahead of the reaction furnace.
Tail gas incineration line
Butterfly Valves →Large-bore isolation to the thermal oxidiser / incinerator.
Unit-Level Valve Strategy
- Molten sulfur is solid below roughly 115-120C - lines and valves need steam or electric tracing, and valve selection favours full-bore, self-draining designs that will not plug on a trace failure
- Acid-gas and tail-gas paths carry the same sour-service material rules as the amine unit upstream
- Reaction-furnace refractory-lined piping limits valve placement to cooler sections of the train
Equipment in this Unit
Fluids in this Unit
Governing Standards
Related process units
Sealing systems specified in this unit
Connected Engineering
Sourcing valves for a Sulfur Recovery Unit?
Send your unit valve list — we supply the full set (Gate Valves, Ball Valves, Butterfly Valves) with certification matched to NACE MR0175 / ISO 15156, in one PO.