Spirax Sarco MST18 Steam Trap

Spirax Sarco MST18 is a maintainable balanced‑pressure thermostatic steam trap designed for small condensate loads, typically used in instrument tracing applications. The unit's body is fabricated from ASTM 303 stainless steel and features a 1/4" NPT connection, making it suitable for compact, tight‑space installations. It is rated for a maximum operating temperature of 210 °C, enabling reliable condensate discharge without excessive live steam loss in low‑to‑moderate duty lines. The MST18 automatically releases condensate while responding to changes in steam pressure and condensate load, helping to protect efficiency and steam quality. This trap is well suited for instrumentation circuits, small steam‑using equipment, and trace heating loops where dependable, serviceable condensate removal is required.