PT62HP Float & Thermostatic Steam Trap (DN40-50)
Large-bore DN40-50 high-pressure float & thermostatic steam trap in cast steel, with internal air vent and SLR/IBR options. To 32 kg/cm²(g) and 425°C, 4–8× the capacity of the DN15-25 band.
- IBR / ASME standard
- Nationwide service
Overview
The PT62HP DN40-50 is the large-bore size band of the high-pressure, H-pattern float and thermostatic (F&T) steam trap, built in cast steel (ASTM A216 Gr. WCB) with stainless steel internals and an internal thermostatic air vent. It is designed for high-capacity condensate drainage from low- and medium-pressure steam heating and process equipment — delivering roughly 4–8× the discharge of the DN15-25 band at the same differential pressure.
It is available with steam lock release (SLR) options and in Non-IBR or IBR-approved form. This band carries a higher body shell design rating (52 @ RT) and a 425°C temperature ceiling, and a 32 kg/cm²(g) maximum operating pressure.
Variants
- PT62HP — thermostatic air vent.
- PT62HP S — with Steam Lock Release (SLR).
- PT62HP C — thermostatic air vent plus SLR.
- Three differential-pressure ratings: PT62HP-21, PT62HP-25 and PT62HP-32, matched to line pressure.
For smaller loads, see the PT62HP DN15-25 band; for low-pressure cast iron duty, see the PT61.
Built and supplied by ME Engineering to IBR / ASME standards, with full documentation and nationwide service support.
Technical Specifications
| Size (mm) | Size (in) | A (mm) | Flange Face-to-Face (mm) | ||
|---|---|---|---|---|---|
| Screwed / SW | Integral Flange | WNRF #150 | WNRF #300 | ||
| 40 | 1.1/2" | 252 | 230 | 350 | 365 |
| 50 | 2" | 252 | 230 | 350 | 365 |
| Component | Material | Specification |
|---|---|---|
| Body | Cast Steel | ASTM A216 Gr. WCB |
| Cover | Cast Steel | ASTM A216 Gr. WCB |
| Gasket | Graphite with SS Reinforcement | — |
| Valve Seat | AISI 420 / ASTM A743 Gr. CA40 | — |
| Ball Float & Lever Assembly | AISI 304 | — |
| Air Vent | Bimetal / SS | — |
| Bolt | ASTM A193 Gr. B7 | — |
| Drain Plug | Carbon Steel | — |
| Bracket Assembly | AISI 304 | — |
| SLR Unit | AISI 304 | — |
| Model | Size | Capacity (kg/hr) at differential pressure (kg/cm²) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 1 | 2 | 3 | 4.5 | 7 | 9 | 10 | 12.5 | 14 | 17.5 | 21 | 25 | 32 | ||
| PT62HP-21 | DN40, 50 | 1820 | 2100 | 2630 | 2814 | 3015 | 3160 | 4020 | 4240 | 4820 | 5060 | 6130 | 6640 | --- | --- |
| PT62HP-25 | DN40, 50 | 1540 | 1780 | 2230 | 2380 | 2550 | 2675 | 3400 | 3590 | 4080 | 4280 | 5185 | 5620 | 5800 | --- |
| PT62HP-32 | DN40, 50 | 1180 | 1360 | 1705 | 1820 | 1950 | 2050 | 2600 | 2750 | 3120 | 3275 | 3970 | 4300 | 4440 | 4680 |
Applications
Benefits
The DN40-50 band delivers roughly 4 to 8 times the discharge capacity of the DN15-25 band at the same differential pressure, which is why it exists as a separate product: large process loads (big heat exchangers, evaporators) need this capacity and would overwhelm the smaller body.
A higher body shell design rating (52 @ RT vs 42 @ RT on the small band) and a 425°C temperature ceiling reflect the heavier casting needed to safely contain the larger internal volume at pressure, so this is not simply the small trap scaled up.
Cast steel construction with welded-on ASTM A105 forged flanges gives a proper high-pressure integral flange joint suited to large-bore steam mains, where the mechanical loads on a threaded connection would be unacceptable.
The valve seat here is upgraded to AISI 420 / ASTM A743 Gr. CA40 versus AISI 410/420 on the small band, giving better wear resistance appropriate to the higher flow velocities through the larger orifice.
IBR-approved option makes the large trap legally usable on boiler-connected high-capacity steam headers in India, not just technically suitable.
Three differential-pressure variants let the large trap be matched to the working differential, which matters more at this capacity because an oversized orifice at low differential can waste significant steam if the trap fails to seal.
The internal thermostatic air vent is especially valuable at this size because large equipment holds a large air volume at start-up, and clearing it quickly gets the process up to temperature faster.
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PT62HP Float & Thermostatic Steam Trap (DN40-50)?
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