Description
Spirax Sarco TD25 thermodynamic steam traps are designed for low-capacity steam mains and trace heating lines, as well as other applications where pressure, temperature, and capacity remain within the specified limits. Maximum operating pressure: 25bar g.
Available Models
| Model | SKU |
|---|---|
| 1/2” TD25 | 1511015000 |
| 3/4” TD25 | 1511020000 |
| 1” TD25 | 1511025000 |
Sizes and Pipeline Connections
1/2”, 3/4”, 1” BSP or NPT threaded connections. DN15, 20 and 25 flanged connections EN1092/ISO7005, PN25.
Options
Insulating cap: Prevents excessively frequent cycling caused by excessive heat loss when the steam trap is exposed to low ambient temperatures, wind, or rain.
Limits
| Maximum body design conditions | PN40 |
|---|---|
| PMA maximum allowable pressure | 40 bar g |
| TMA maximum allowable temperature | 400°C |
| PMO maximum operating pressure for saturated steam | 25 bar g |
| TMO maximum operating temperature | 400°C |
| Maximum cold hydraulic test pressure | 60 bar g |
Note: Under operating conditions, the maximum back pressure must not exceed 80% of the inlet pressure; otherwise, the steam trap will not close.
Materials
| Item | Component | Material |
|---|---|---|
| 1 | Body | Stainless steel ASTM A743 Gr.CA40F |
| 2 | Cap | Stainless steel AISI 416 |
| 3 | Disc | Stainless steel BS 1449420 S45 |
| 4 | Strainer screen | Stainless steel BS 1449 304 S16 |
| 5 | Strainer cap | Stainless steel AISI 416 |
| 6 | Strainer cap gasket | Stainless steel BS 1449 304 S16 |
| 7 | Insulating cap, optional | Aluminum |
| 8 | Flange | Carbon steel pipe |
Weights
| Size | Flanged weight (kg) | Threaded weight (kg) |
|---|---|---|
| DN15 | 2.4 | 0.75 |
| DN20 | 3.1 | 0.95 |
| DN25 | 4.2 | 1.50 |
Cleaning or Replacing the Strainer Screen
Loosen the strainer cap with a wrench, remove and clean the strainer screen, and replace it if damaged. During reassembly, insert the strainer screen into the cap and screw the cap back into the body. Apply a small amount of molybdenum disulfide lubricant to the leading thread section, ensure gasket faces are clean, and tighten the strainer cap to the recommended torque.
Disposal
This product is recyclable. Proper disposal does not present environmental concerns.
Ordering Information
Example: 1 - Spirax Sarco 1/2” TD25 thermodynamic steam trap, BSP threaded connection.
Spare Parts
Pressure disc set (set of 3), strainer screen and gasket, insulating cap, strainer cap gasket set (set of 3).
Installation
Install the steam trap preferably in a horizontal pipeline with a short drop leg upstream. An isolating valve must be installed to allow maintenance and replacement. A suitable method should also be provided to verify correct steam trap operation, such as a sight glass or Spiratec system. Sight glasses must be installed at least 1m downstream of discharge-type steam traps. Where the steam trap discharges into a closed condensate return system, install a check valve downstream to prevent backflow. Remove all packaging and protective caps, and ensure all connections are clean and unobstructed. Open the isolating valve slowly until normal operating conditions are reached to prevent system shock. Check the steam trap for leakage and correct operation. Always use appropriate tools, safety precautions, and protective equipment.
If an insulating cap is fitted, remove it first. Then loosen the cap using a standard wrench. Do not use an adjustable wrench or pipe wrench, as this may damage the cap. If the disc and seat surfaces show minor wear, use lapping compound and lap the disc and seat separately in a figure-eight motion. If wear is excessive and cannot be repaired by lapping, machine and polish the seat surface. Note: Install a new disc. Lapping depth must not exceed 0.25mm. During reassembly, position the grooved side of the disc against the seat face and tighten the cap. No gasket is required, but suitable high-temperature anti-seize grease should be applied.