The Spirax Sarco BPC32/BPC32Y series comprises carbon steel, pressure-balanced thermostatic steam traps for saturated steam systems up to 32 bar g. Threaded, welded, and flanged connections are available. The BPC32Y is equipped with a Y-type cylindrical strainer, while CV models are available with an integral check valve. Suitable for condensate drainage from saturated steam mains and process heating equipment, with resistance to water hammer and freeze protection.
BPC32 real-scene photo
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Spirax Sarco BPC32/BPC32Y Carbon Steel Balanced Pressure Thermostatic Steam Trap
Carbon steel balanced pressure steam trap for condensate drainage, with a Y-type strainer option.
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Models
The BPC32 series consists of carbon steel pressure-balanced thermostatic steam traps, all fitted with standard STD capsules. BPC32 and BPC32CV use flat stainless steel strainers, while BPC32Y and BPC32YCV use Y-type cylindrical high-capacity strainers. BPC32CV and BPC32YCV add an integrated check valve to their respective base models. Select BPC32 where installation space is limited and the medium is relatively clean; select BPC32Y where contamination is greater or a larger filtration area is required. Where condensate backflow is a risk, select BPC32CV or BPC32YCV based on the required strainer configuration.
BPC32Standard compact pressure-balanced thermostatic steam trap
BPC32 is the standard model in this series, featuring a carbon steel body, pressure-balanced thermostatic operating principle, flat stainless steel strainer, and standard STD capsule. It is suitable for conventional saturated steam systems, with a compact strainer design for applications with limited installation space and relatively clean media.
BPC32YY-type high-capacity strainer pressure-balanced thermostatic steam trap
BPC32Y is based on BPC32 and features a Y-type cylindrical stainless steel strainer with a standard STD capsule. The Y-type strainer provides a larger filtration area and is suitable for steam systems with higher contamination during initial operation or where enhanced dirt-handling filtration is required.
BPC32CVCompact pressure-balanced thermostatic steam trap with integrated check valve
BPC32CV is based on BPC32 with an added integrated check valve, featuring a flat stainless steel strainer and standard STD capsule. It is suitable for steam equipment or piping that requires a compact flat strainer design and has a risk of condensate backflow.
BPC32YCVY-type high-capacity strainer pressure-balanced thermostatic steam trap with check valve
BPC32YCV combines a Y-type cylindrical high-capacity stainless steel strainer with an integrated check valve and uses a standard STD capsule. It is suitable for steam piping requiring both a large filtration area and condensate backflow prevention.
Specifications
- Design pressure rating
- PN40
- Maximum allowable pressure
- 50 bar g at 50°C
- Maximum allowable temperature
- 400°C at 35 bar g
- Maximum operating pressure for saturated steam
- 32 bar g at 281°C
- Maximum operating temperature
- 281°C at 32 bar g
- Minimum allowable temperature
- -60°C
- Design maximum cold hydraulic test pressure
- 75 bar g
- Body material
- Carbon steel DIN 17243 C22.8 / ASTM A105N
- Seat material
- Stainless steel BS 970 431 S29
- Strainer material
- Stainless steel AISI 304
- Capsule material
- Stainless steel
- Capsule subcooling
- STD 12°C / NTS 6°C / SUB 24°C below saturation temperature
- Strainer type
- Flat (BPC32) / Y-type cylindrical (BPC32Y)
- Integral check valve
- Optional (BPC32CV / BPC32YCV)
- Connection type
- Screwed (BSP/NPT), socket weld (BS 3799), butt weld (EN 12627), flanged
- Connection sizes
- 1/2" (DN15), 3/4" (DN20), 1" (DN25)
- Flange standard
- EN 1092 PN40, ANSI B16.5 Class 150/300, JIS/KS 10K/20K
- Material certificate
- EN 10204 3.1
- Pressure equipment directive
- 97/23/EC
Application scenarios
Saturated Steam Main Condensate Drainage
Used for condensate drainage from saturated steam mains. BPC32 is suitable for conventional main lines with limited installation space and relatively clean media; this series provides resistance to water hammer and freeze protection.
Process Heating Equipment Condensate Drainage
Used for condensate drainage from various types of process heating equipment. BPC32Y is equipped with a Y-type cylindrical high-capacity strainer, making it suitable for operating conditions with high levels of debris during initial system startup.
Selection points
Selectable capsules with different subcooling levels
STD, NTS, and SUB capsules are available, discharging condensate at 12°C, 6°C, and 24°C below saturation temperature, respectively. Select according to the process drainage temperature differential requirements.
Select the integrated strainer design by model
BPC32 is equipped with a flat stainless steel strainer, while BPC32Y is equipped with a Y-type cylindrical strainer. Select the appropriate model according to medium cleanliness and filtration requirements.
Optional integrated check valve for backflow prevention
BPC32CV and BPC32YCV feature integrated check valves and are suitable for applications requiring prevention of condensate backflow.
Saturated steam operating pressure and temperature limits
This series is designed to PN40. The maximum operating pressure for saturated steam is 32 bar g, corresponding to a maximum operating temperature of 281°C.
Installation & maintenance notes
Confirm check-valve model for backflow conditions
Standard BPC32 and BPC32Y models do not include an integrated check valve. Where there is a risk of condensate backflow after shutdown, select BPC32CV or BPC32YCV with the CV configuration and verify that the installed model includes an integrated check valve.
FAQ
What is the main difference between the BPC32 and BPC32Y, and how should I choose?
Both are in-line repairable carbon steel balanced pressure thermostatic steam traps, and the key difference lies in the built-in strainer design. The BPC32 uses a flat strainer for a more compact construction, suitable for conventional systems where space is limited and the medium is relatively clean. The BPC32Y uses a Y-type cylindrical strainer with a larger filtering area and greater dirt-handling capacity, making it more suitable for steam mains carrying more impurities during initial start-up.
What operating conditions and systems is this steam trap suitable for?
This series is mainly used for condensate drainage on saturated steam mains and various process heating equipment, with strong waterhammer resistance and freeze protection. The specific configuration should be confirmed according to the actual model and application conditions.
What additional functions do the BPC32CV and BPC32YCV offer over the base models?
The CV models add an integral check valve to the corresponding base model, preventing condensate from flowing back into the process equipment during shutdown. The BPC32CV is a compact anti-backflow version; the BPC32YCV combines the dirt-handling capacity of a Y-type large-capacity strainer with backflow prevention, making it suitable for more complex steam piping.
How do I select the capsule type, and does it affect the discharge temperature?
Yes. The standard capsule (STD) discharges condensate at 12°C below the saturated steam temperature, the NTS capsule at 6°C below, and the SUB capsule at 24°C below. Selection should take into account the system's sensitivity to condensate accumulation and the required discharge temperature difference; the capsule type must be specified when ordering.
Which connection types does this product support, and what should be considered during maintenance?
It supports screwed, socket weld (SW), butt weld (BW) and integral flanged connections, covering sizes 1/2", 3/4", 1" as well as DN15, DN20, DN25. As an in-line repairable model, pay particular attention to the capsule and seat assembly, strainer and gaskets; for systems with high levels of impurities, keep a close eye on the strainer cleaning status.
Documents
BPC32 and BPC32Y Carbon Steel Balanced Pressure Thermostatic Steam TrapsDatasheet · ChineseBPC32 and BPC32Y Carbon Steel Balanced Pressure Thermostatic Steam TrapsDatasheet · EnglishBPC32, BPC32Y, BPC32F, BPC32YF, BPC32CV, BPC32CVF, BPC32YCV and BPCYCVF Carbon Steel Balanced Pressure Thermostatic Steam TrapsManual · Chinese