Spirax Sarco BT6-B clean steam pressure-balanced trap, available in BT6-BL and BT6-BH models, features a 316L stainless steel body and ASME BPE sanitary clamp connections. With a maximum saturated steam operating pressure of 6 barg, it is suitable for automatic condensate drainage in CIP/SIP circuits, steam sterilizers, and low points of clean steam mains.
BT6-B Clean Steam Trap with Balanced Pressure, sanitary clamp product view
1 / 5
Spirax Sarco BT6-B Clean Pressure-Balanced Steam Trap
Clean pressure-balanced steam trap for CIP/SIP systems, with electropolishing available.
Select model
Genuine product assurance
We can help verify product data and purchasing details.
Model confirmation
Confirm model, connection and key options before ordering.
After-sales support
After-sales communication support is provided according to the order agreement.
Models
Both BT6-BL and BT6-BH belong to the Spirax Sarco BT6-B clean pressure-balanced steam trap series. Available product documentation confirms the series materials, hygienic clamp connections, pressure-temperature range, surface roughness, and installation requirements, but does not explicitly state the capacity differences or specific applicable load ranges between the two models. Therefore, BL cannot be identified as low capacity and BH as high capacity based solely on the available descriptions. Final selection should be further confirmed using the manufacturer's capacity curves for the specific model, condensate load, and operating differential pressure.
BT6-BLBT6-BL Clean Pressure-Balanced Steam Trap
BT6-BL belongs to the Spirax Sarco BT6-B clean pressure-balanced steam trap series. The product features an ASTM A276 316L valve body and an AISI 316L temperature-sensing element, with 1/2 inch, 3/4 inch, 1 inch, or 1 1/2 inch ASME BPE hygienic clamp connections. The valve body design rating is PN10, the maximum operating pressure for saturated steam is 6 barg, and the maximum operating temperature is 165°C@6 barg. Internal surface roughness is 0.6 μm Ra, with optional electropolishing to 0.375 μm Ra. It must be installed vertically with downward flow for self-draining. At steam pressures not exceeding 2.5 barg, condensate discharge subcooling is below 2°C. Available product documentation does not specify the capacity rating for this model.
BT6-BHBT6-BH Clean Pressure-Balanced Steam Trap
BT6-BH belongs to the Spirax Sarco BT6-B clean pressure-balanced steam trap series. The product features an ASTM A276 316L valve body and an AISI 316L temperature-sensing element, with 1/2 inch, 3/4 inch, 1 inch, or 1 1/2 inch ASME BPE hygienic clamp connections. The valve body design rating is PN10, the maximum operating pressure for saturated steam is 6 barg, and the maximum operating temperature is 165°C@6 barg. Internal surface roughness is 0.6 μm Ra, with optional electropolishing to 0.375 μm Ra. It must be installed vertically with downward flow for self-draining. At steam pressures not exceeding 2.5 barg, condensate discharge subcooling is below 2°C. Available product documentation does not specify the capacity rating for this model.
Specifications
- Body design conditions
- PN10
- Maximum allowable pressure (PMA)
- 10 barg @ 140°C
- Maximum allowable temperature (TMA)
- 177°C @ 9.2 barg
- Minimum allowable temperature
- -254°C
- Maximum operating pressure for saturated steam (PMO)
- 6 barg
- Maximum operating temperature (TMO)
- 165°C @ 6 barg
- Minimum operating temperature
- 0°C
- Maximum designed cold hydraulic test pressure
- 15 barg
- Pipe connections
- ½", ¾", 1", 1½" ASME BPE sanitary clamp
- Body material
- ASTM A276 316L
- Thermostatic element material
- AISI 316L
- Sealing materials
- Tuf-steel® (PTFE + AISI 316), optional PTFE with Viton jacket
- Internal surface roughness
- 0.6 μm Ra (25 μin)
- External surface roughness
- 1.0 μm Ra (40 μin)
- Optional internal electropolished surface
- 0.375 μm Ra (15 μin)
- Standards compliance
- ASME BPE, 2014/68/EU
- Seal certification
- FDA CFR 21 Part 177.1550, USP Class VI
- Animal-derived ingredients
- None (ADI)
- Subcooling of drainage temperature
- ＜2°C (steam pressure ≤2.5 barg)
- Installation orientation
- Vertical, flow downward, self-draining
Application scenarios
CIP/SIP System Condensate Drainage
Used in CIP/SIP circuits for clean and purified systems to discharge condensate generated during steam cleaning or sterilization in place. The product features a 316L stainless steel body, ASME BPE sanitary clamp connections, and must be installed vertically with downward flow to enable self-drainage.
Steam Sterilizer Condensate Removal
Used to discharge condensate generated by steam sterilizers during the sterilization process. Product documentation confirms its suitability for sterilizers. The temperature-sensitive element responds to condensate temperature, and in typical clean applications with steam pressure not exceeding 2.5 barg, the discharge temperature is within 2 °C below saturated steam temperature.
Clean Steam Main Low-Point Drainage
Installed at low points of clean steam mains or branch lines to discharge condensate generated and accumulated during steam distribution. Product documentation confirms its suitability for main drainage and specifies a 316L stainless steel body with sanitary clamp connections.
Selection points
Low-subcooling discharge
At steam pressures not exceeding 2.5 barg, condensate is discharged with subcooling below 2°C, allowing discharge close to saturated steam temperature. Suitable for clean steam or SIP applications with stringent condensate temperature requirements.
Hygienic surface roughness and electropolishing option
The internal valve body surface roughness is 0.6 μm Ra, with optional electropolishing to 0.375 μm Ra, meeting hygienic surface finish selection requirements.
Seal material compliance and absence of animal-derived components
Seals comply with FDA CFR 21 Part 177.1550 and USP Class VI requirements and are declared free of animal-derived components, making them suitable for clean processes requiring material compliance verification.
Self-draining installation with vertical downward flow
The product requires vertical installation with downward flow direction and provides self-draining characteristics. The specified installation orientation should be followed during selection.
ASME BPE hygienic clamp connections
Available with 1/2 inch, 3/4 inch, 1 inch, and 1 1/2 inch ASME BPE hygienic clamp connections for clean steam systems using corresponding hygienic piping interfaces.
Clean steam pressure-temperature limits
The valve body design rating is PN10, the maximum operating pressure for saturated steam is 6 barg, and the maximum operating temperature is 165°C@6 barg. Actual pressure and temperature conditions should be verified during selection.
Installation & maintenance notes
Install with vertical downward flow
The steam trap should be installed vertically with the fluid flowing downward to enable self-drainage.
FAQ
How does the BT6-B Clean Steam Trap with Balanced Pressure work?
The BT6-B uses a balanced-pressure thermostatic operating principle. Its core component is a stainless steel capsule filled with a temperature-sensitive liquid. The valve is fully open when cold or during startup, allowing air, condensate, and CIP media to be discharged. As the system temperature approaches saturated steam temperature, the liquid in the capsule expands and closes the valve, reducing steam loss while maintaining effective drainage.
What applications is the BT6-B suitable for?
The BT6-B is used for condensate drainage in clean and pure systems, including sterilizers, main line drainage, CIP/SIP systems, and process piping.
What is the difference between BT6-BL and BT6-BH?
BT6-BL is the low-capacity model, while BT6-BH is the high-capacity model. The specific configuration must be confirmed based on the actual model and application conditions.
What are the installation requirements for the BT6-B?
The BT6-B should be installed vertically with the flow downward to ensure that the body is self-draining. Check the flow-direction arrow on the body during installation. A length of cooling pipe must be provided upstream to prevent condensate from accumulating at the process equipment, and the thermostatic element should not be exposed to superheated conditions. Gaskets and installation clamps are not supplied with the product.
What sizes, connection types, and spare parts are available for the BT6-B?
Available sizes are 1/2 inch, 3/4 inch, 1 inch, and 1 1/2 inch. The standard connection type is an ASME BPE sanitary clamp. Available spare parts include the thermostatic element, sealing ring, and lower body with seat. Specify the size and model when ordering spare parts.
Documents
BT6-B Clean Steam Trap with Balanced PressureDatasheet · ChineseBT6-B and BT6-B Food+ Sanitary Balanced Pressure Thermostatic Steam Trap Installation and Maintenance InstructionsManual · EnglishBT6-B and BT6-B Food+ Sanitary Balanced Pressure Thermostatic Steam Trap Installation and Maintenance InstructionsManual · Chinese