A steam trap station includes not just the trap itself, but also the upstream strainer, isolation valves, check valve, sight glass, and test connections. All of these components require maintenance, and a failed strainer or check valve can be just as costly as a failed trap.
AQ Process Systems sources and exports spare parts for every component in the trap station assembly. We stock trap internals (thermostatic elements, buckets, floats, discs), strainer screens, check valves, sight glasses, and isolation valve parts for all major trap manufacturers.
Maintaining complete trap stations, not just the traps, is essential for condensate recovery efficiency. A plugged strainer causes condensate backup, a failed check valve allows reverse flow, and a cloudy sight glass gives false confidence in trap performance.
| Component | Specification | Description |
|---|---|---|
| Trap Internals | ||
| Thermostatic Elements | Balanced pressure or bimetallic | SS or phosphor bronze | Replacement thermostatic elements for balanced-pressure and bimetallic steam traps, the primary wear item. |
| Inverted Bucket Internals | SS bucket, lever, valve assembly | Complete internal mechanism for inverted bucket traps, bucket, lever, pivot, valve, and seat. |
| Float & Thermostatic Internals | SS float ball, thermostatic air vent, valve seat | Internal components for F&T traps, float ball, lever, main valve, thermostatic air vent element, and seat. |
| Disc Trap Internals | SS disc, seat ring, cap gasket | Replacement disc, seat ring, and cap gasket for thermodynamic (disc) steam traps. |
| Strainer Components | ||
| Y-Strainer Screens | SS mesh | 40-100 mesh | Various pipe sizes | Replacement strainer screens for upstream Y-strainers, protecting the trap from scale and debris. |
| Y-Strainer Bodies | CS or SS | Screwed or flanged | Complete Y-strainer bodies when the existing strainer body is corroded or damaged beyond repair. |
| Strainer Blow-off Valves | Globe or ball | Small-bore | Drain valves on the strainer cap for blowing down accumulated debris without removing the cap. |
| Station Accessories | ||
| Check Valves | Swing, disc, or piston | SS or bronze | Non-return valves downstream of the trap preventing condensate backflow, critical for proper trap operation. |
| Sight Glasses | Bull's eye or full-flow | SS or bronze body | Visual indicators confirming condensate flow and trap operation, bull's-eye or full-flow observation type. |
| Isolation Valves | Gate or ball | Screwed or flanged | Inlet and outlet isolation valves allowing trap station maintenance without system shutdown. |
| Test Valves / Connections | Ball valve | Small-bore | For trap testing | Test points for checking trap operation, visual, temperature, or ultrasonic testing access. |
Parts are matched to OEM material specifications and dimensional tolerances. Please provide the equipment manufacturer, model number, and serial number (if available) for precise part identification.
A typical trap station consists of an upstream isolation valve, Y-strainer, the steam trap, a downstream check valve, a sight glass, a test connection, and a downstream isolation valve. Each component serves a specific function and all require maintenance spares. We supply parts for every element of the station.
Replacement frequency depends on trap type and operating conditions. Thermostatic elements typically last 3-7 years, inverted bucket internals 5-10 years, F&T internals 5-8 years, and disc trap internals 1-3 years (they wear fastest). In superheated steam or dirty condensate service, replacement intervals are shorter.
Yes. We supply OEM-compatible internal repair kits for Spirax Sarco (FT, BPT, TD, SM series), TLV (JH, J, SS, P series), Armstrong (800, 880, 1011 series), Forbes Marshall, GESTRA, and other manufacturers. Parts are identified by the trap model and serial number.
The check valve prevents reverse condensate flow through the trap when backpressure occurs, such as when multiple traps discharge into a common condensate header. Without a check valve, high-pressure condensate from other traps can flow backwards through a low-pressure trap, causing waterlogging, reduced heat transfer, and potential water hammer.
Bull's-eye (window) sight glasses are most common for trap stations, they allow visual confirmation of condensate discharge without full-flow interruption. Full-flow sight glasses provide clearer observation but are larger and more expensive. For high-pressure systems, use forged-body sight glasses rated for the system pressure.
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