Explore Spirax Sarco steam check valves, strainers, separators and pipeline ancillaries, including air vents, sight glasses, vacuum breakers and diffusers.
Pipeline ancillaries are usually selected by the operating problem they solve rather than by component family alone. The fastest route is to identify whether the main issue is reverse flow, moisture, dirt, trapped air, shutdown vacuum or noisy discharge, then move into the ancillary that corrects that condition first.
| Line-side problem | Typical ancillary route | Why it matters |
|---|---|---|
| Reverse flow or fallback risk | Check valves | Protects downstream equipment and helps limit flooding or waterhammer risk. |
| Entrained moisture | Separators | Improves steam or gas quality before it reaches sensitive equipment. |
| Solid contamination | Strainers and filters | Protects valves, traps, gauges and control hardware from debris. |
| Non-condensable gases | Air vents and air eliminators | Supports faster warm-up, better heat transfer and lower corrosion risk. |
| Vacuum or noisy discharge | Vacuum breakers and diffusers | Protects equipment during shutdown and improves discharge safety. |
Pipeline accessory searches usually start from the operating problem rather than from one product family name. Use steam check valves when the first concern is reverse flow, fallback or waterhammer risk. Review strainers when debris threatens downstream valve seats, traps or control hardware.
If the priority is steam dryness or moisture removal before sensitive equipment, move into steam separators. Use air vents when start-up air or other non-condensable gases are affecting heat transfer, and compare vacuum breakers when shutdown vacuum is the main protection issue.
AV13 is a Spirax Sarco brass balanced-pressure thermostatic air vent for steam systems. It is typically considered for high points on steam mains or equipment where air and other non-condensable gases need to be removed without ma
AVC32 is a Spirax Sarco carbon steel balanced-pressure thermostatic air vent for steam systems, fitted with an integral flat strainer screen. Pressure-bearing components are made by TÜV-approved suppliers to AD-Merkblatt WO/TRD100
DCV3 is a Spirax Sarco wafer disc check valve for users who need compact non-return protection in steam, condensate, hot water and process pipework. The documented DCV3 route uses stainless steel construction and can be selected w
The AE30 series automatically removes air from hot- and cold-water liquid systems. View models and connections, pressure/temperature limits, free air capacity, installation, commissioning, maintenance, spares and ordering informat
Flanged SG iron baffle-type separator for removing entrained liquid from steam, compressed-air and gas systems, in DN40 to DN200 sizes.
The Spirax Sarco VB14 is a compact brass vacuum breaker for condensing steam and liquid systems. It admits air as equipment cools to prevent vacuum from restricting condensate drainage and operation.
Integrally flanged carbon steel Y-type strainer for DN15 to DN400 pipelines, with EN, ASME and JIS/KS flange options and selectable stainless-steel or Monel screens.
The Spirax Sarco DCV4 is a stainless steel wafer disc check valve for ANSI 150 or ANSI 300 flanges, covering DN15 to DN100 for compatible steam, condensate, hot-water and process duties.
DCV41 is an austenitic stainless steel disc check valve for preventing reverse flow in process lines, hot water, steam and condensate systems, with screwed or socket-weld connections and documented metal, Viton and EPDM seat optio
Compact stainless steel vacuum breaker for condensing steam, vapour and liquid systems, with 1/2 inch BSP or NPT connections and operation up to 21 barg.
Spirax Sarco AE14 is a maintainable SG iron float-operated automatic air vent with a Viton valve head for removing air and gases from compatible liquid systems.
