PT65H High Capacity Float & Thermostatic Steam Trap
High-capacity cast iron float & thermostatic steam trap, 1½"–2", in double-orifice and rotary-orifice variants with internal air vent and SLR options. Rated to 250 psig / 425°F, up to ~38,340 lbs/hr.
- IBR / ASME standard
- Nationwide service
Overview
The PT65H is a high-capacity float and thermostatic (F&T) steam trap with an internal thermostatic air vent, built in cast iron with stainless steel internals, in 1½" and 2" sizes. It drains large condensate loads from low- and medium-pressure steam heating and process equipment — unit heaters, heat exchangers, driers and jacketed vessels — with a modulating discharge at steam temperature and excellent automatic air venting.
It is offered in double-orifice and rotary-orifice variants, with steam lock release (SLR) options, and is rated to 250 psig maximum allowable pressure and 425°F.
Orifice variants
- PT65H-65 (Double Orifice) — very high capacity at low differential (up to ~33,660 lbs/hr at 65 psi), working range to 65 psi.
- PT65H-200 (Rotary Orifice) — holds capacity across a wide 200 psi differential range (up to ~38,340 lbs/hr at 200 psi).
Air vent / SLR options
- PT65H — thermostatic air vent.
- PT65H S — with Steam Lock Release (SLR).
- PT65H C — thermostatic air vent plus SLR.
For higher pressures or socket-weld / flanged ends, step up to the cast-steel PT66 in the same high-capacity family.
Built and supplied by ME Engineering to IBR / ASME standards, with full documentation and nationwide service support.
Technical Specifications
| Model | Size | Capacity (lbs/hr) at differential pressure (psi) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 1 | 2 | 5 | 10 | 15 | 20 | 30 | 40 | 65 | 90 | 115 | 145 | 170 | 185 | 200 | ||
| PT65H-65 (Double Orifice) | 1½", 2" | 6930 | 8470 | 11480 | 13300 | 14050 | 16280 | 17650 | 21860 | 25400 | 33660 | --- | --- | --- | --- | --- | --- |
| PT65H-200 (Rotary Orifice) | 1½", 2" | 2040 | 2700 | 3820 | 6050 | 8580 | 10250 | 12100 | 14490 | 17160 | 21730 | 25100 | 29000 | 32400 | 35500 | 36900 | 38340 |
| Component | Material | Variant |
|---|---|---|
| Body | Cast Iron | — |
| Cover | Cast Iron | — |
| Gasket | Non CAF | — |
| Valve Seat | AISI 410/420 | Double-orifice |
| Valve Seat Housing | AISI 304 | Rotary-orifice |
| Valve Pin | AISI 410/420 | — |
| Ball Float / Float Assembly | AISI 304 | — |
| Lever | AISI 304 | Double-orifice |
| Stem | AISI 304 | — |
| Air Vent | Stainless Steel / AISI 304 | — |
| Bolt | High Tensile | — |
| Drain Plug | Carbon Steel | — |
| SLR Unit | AISI 304 | — |
Applications
Benefits
The two orifice options make this one body serve two very different duties: the double-orifice variant gives very high capacity at low differential pressure (nearly 7000 lbs/hr at 0.5 psi), while the rotary-orifice variant trades initial capacity for a much wider 200 psi working range, so the buyer picks by whether the system runs at low differential and high load or across a broad pressure range.
High capacity in a single 1½"/2" body means one PT65H can replace several smaller traps on a large heat exchanger or drier, reducing installation points and the associated leak and maintenance surface.
The internal thermostatic air vent clears the large air volume these big process units hold at start-up, getting equipment to temperature faster than a bucket trap that vents air slowly.
Discharging condensate at steam temperature keeps the full heating surface active and avoids condensate backing up and sub-cooling, which is the main efficiency argument for a float trap over a thermostatic-only trap on process equipment.
The rotary-orifice variant's ability to hold capacity across 200 psi suits systems where the differential swings widely with load, since a fixed double-orifice would either waste steam at low differential or starve at high differential.
Cast iron body keeps cost reasonable for this capacity class at the 250 psig ceiling; for higher pressure or SW/FL ends, the cast steel PT66 is the step up in the same high-capacity family.
SLR (steam lock release) option handles equipment where condensate gets locked behind trapped steam, such as siphon-drained rotating cylinders, which a plain float trap cannot clear on its own.
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PT65H High Capacity Float & Thermostatic Steam Trap?
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