Chem Show Coverage: Steam Trap Monitoring Gets Easier

Sensor can be tied into a computerized maintenance management system for proactive maintenance scheduling.

By Mark Rosenzweig, Editor-in-Chief

A wireless non-intrusive sensor from Armstrong International, Three Rivers, Mich. (Booth #427), is said to efficiently monitor and evaluate the operation of any type of steam trap. The Armstrong Intelligent Monitoring (AIM) Module ST5700 immediately detects trap failures and, thus, can serve as a powerful tool to significantly reduce energy losses and emissions, notes the firm.

The AIM ST5700 detects blow-through and cold traps via acoustics — all algorithmns for analyzing the acoustic response are built right into the device. It communicates via Wireless HART to a gateway, which can be supplied by Armstrong or other vendors, and then to a controller for monitoring or alarming. It can be tied into a computerized maintenance management system for proactive maintenance scheduling.

The ST5700 comes in models with and without local LCD display. The local display shows trap condition (okay, blow-through or cold), temperature, and battery condition. For readings at 5-minute intervals, the battery should last three-to-five years, says Armstrong's Kerry Phillips, who adds that battery replacement is the only maintenance required. All models are intrinsically safe (suitable for service in Class I/II/III, Division 1, Zone 0 rated environments). It can be clamp mounted on ½-in. to 3-in. pipes (having a maximum temperature of 315°C) for permanent or temporary monitoring. It is particularly handy for keeping tabs on inaccessible steam traps.

The sensor/gateway installation typically costs $1,500-$2,000 per point. The Armstrong gateway can handle up to 100 points, and can provide HART, OPC or Modbus outputs.

The company also offers a complementary device, the AIM AD5000, for acoustic monitoring of safety relief valves.

Show Comments
Hide Comments

Join the discussion

We welcome your thoughtful comments.
All comments will display your user name.

Want to participate in the discussion?

Register for free

Log in for complete access.


No one has commented on this page yet.

RSS feed for comments on this page | RSS feed for all comments