Series 40
Bellows Steam Traps
An all stainless steel thermostatic trap whose welded bellows closely follows the saturated steam curve, for process, heating, drip and tracing service.
- Max pressure
- 200 psi (14 bar)
- Max temperature
- 400 °F (204 °C)
- Body rating
- ANSI Class 300
- Sizes
- 3⁄8" – 3⁄4" NPT
Applications
- “A” orifice: process and heating applications
- “B” orifice: drip and tracing applications
Operating principle
A welded stainless steel bellows senses the trap inlet pressure and temperature and controls the condensate discharge of the trap. The trap discharges condensate and follows the saturating steam curve closely within 10 °F (6 °C).
Design features
- Excellent thermal efficiency
- Fail-open
- Resistance to corrosion and hydraulic shocks
- Self-draining and freeze-proof
- Venting of air and non-condensable gases
- Excellent back pressure capability
- Fast response to temperature change
- Close following of saturation line
- Compact and light weight; easy installation
- All stainless steel trap
Capacities and seat orifices
Parts and materials
| Item | Part | Material |
|---|---|---|
| 1 | Inlet fitting | Stainless steel |
| 2 | Body housing | Stainless steel |
| 3 | Body plate | Stainless steel |
| 4 | Outlet fitting | Stainless steel |
| 5 | Bellows | Stainless steel |
| 6 | Mounting plate | Stainless steel |
| 7 | Name plate | Aluminum |
Dimensions and weights
| End connectionin (DN) | “D” Øin (mm) | “L”in (mm) | Weightlb (kg) |
|---|---|---|---|
| 3⁄8 (10) | 1 13⁄16 (46) | 2 5⁄16 (59) | 0.30 (0.14) |
| 1⁄2 (15) | 1 13⁄16 (46) | 2 9⁄16 (65) | 0.38 (0.17) |
| 3⁄4 (20) | 1 13⁄16 (46) | 2 9⁄16 (65) | 0.48 (0.22) |
Installation
Install trap horizontally or vertically downward with a strainer at the trap inlet.