The IBV Z series consists of alloy steel inverted bucket steam traps for condensate drainage in saturated and superheated steam systems. The body is made of ASTM A182 F22 CL.3 alloy steel, with a maximum working pressure of 123.6 bar g, a maximum working temperature of 538°C, and a maximum differential pressure of 110 bar. These traps are suitable for condensate drainage on high-temperature, high-pressure steam mains and superheated steam transmission lines, with threaded, socket weld, and flanged connection options.
Spirax Sarco IBV Z dual-flange inverted bucket steam trap product image
1 / 1
IBV Z Series Inverted Bucket Steam Trap | Spirax Sarco
Inverted bucket steam trap for condensate removal from saturated and superheated steam lines, available with multiple connection options.
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.
Specifications
- Product Type
- Alloy Steel Inverted Bucket Steam Trap
- Operating Medium
- Saturated steam, superheated steam
- Body Material
- Alloy steel ASTM A182 F22 CL.3
- Cover Material
- Alloy steel ASTM A182 F11
- Internal Parts Material
- Stainless steel AISI 316, 400 series
- Maximum Allowable Pressure (PMA)
- 155.1 bar g @ 50°C (ASME Class 900 body)
- Maximum Allowable Temperature (TMA)
- 538°C @ 55.3 bar g
- Minimum Allowable Temperature
- -29°C
- Maximum Operating Pressure (PMO)
- 123.6 bar g @ saturated temperature (ASME Class 900 body)
- Maximum Operating Temperature (TMO)
- 538°C @ 55.3 bar g
- Maximum Operating Differential Pressure
- 110 bar
- Flange Pressure Ratings
- ASME Class 150, 300, 600, 900, 1500; EN 1092 PN16, PN25, PN40, PN63, PN100, PN160
- Connection Types
- Threaded BSP/NPT, socket weld ASME B16.11, flanged ASME B16.5/EN 1092
- Size Range
- 1/2", 3/4", 1", 1-1/2", 2", 3" (DN15, DN20, DN25, DN40, DN50, DN80)
- Design Standards
- ASME VIII, PED 97/23/EC
- Material Certificate
- EN 10204 3.1
Application scenarios
Condensate Drainage from High-Temperature, High-Pressure Saturated Steam Main Lines
Used for condensate drainage in high-temperature, high-pressure saturated steam transmission lines. The IBV Z series features an alloy steel body and cover with stainless steel internal parts. It is suitable for high-temperature, high-pressure saturated steam service, while its low-friction moving internal components provide timely opening and closing, ensuring efficient drainage and minimizing steam leakage.
Steam Trapping in Superheated Steam Transmission Lines
Used to drain condensate from superheated steam transmission lines and maintain unobstructed drainage. The IBV Z series is specifically suitable for superheated steam, with a maximum operating temperature of 538°C. Its alloy steel pressure-retaining components and low-friction stainless steel moving internal parts support timely operation under high-temperature conditions and help minimize steam leakage.
Selection points
Alloy steel body and bonnet for high-temperature service
The IBV Z series features an ASTM A182 F22 CL.3 alloy steel body and an ASTM A182 F11 alloy steel bonnet. Both the maximum allowable temperature and maximum operating temperature reach 538°C, making the series suitable for saturated and superheated steam service.
Selection capability for maximum differential pressures up to 110 bar
The series supports a maximum operating differential pressure of 110 bar and can be selected for high-differential-pressure steam condensate drainage applications.
Compatibility with multiple connection standards
The series is available with BSP or NPT threaded connections, ASME B16.11 socket-weld connections, and ASME B16.5 or EN 1092 flanged connections, making it compatible with ASME and EN piping connection standards.
Size range from DN15 to DN80
The series covers sizes from 1/2 inch to 3 inches, corresponding to DN15 to DN80.
AISI 316 and 400 series stainless steel internal components
The internal components of the series are manufactured from AISI 316 and 400 series stainless steel.
Installation & maintenance notes
Install vertically below the drainage point
The steam trap must be installed below the drainage point, with the body vertical, the cover facing upward, and the inlet at the bottom, ensuring that the bucket mechanism can move vertically without friction.
Upstream strainer and upstream/downstream isolation valves
An upstream strainer is recommended to protect the IBV steam trap. Isolation valves are recommended upstream and downstream for safe inspection, cleaning, and maintenance.
Maintain a distance of at least 1 m from downstream equipment
The IBV is a discharge-type steam trap. If downstream equipment or accessories are required, they must be installed at least 1 m from the outlet.
Check valve option for high-differential-pressure models
Models with a maximum differential pressure of 40 bar and above can be fitted with an integral stainless steel check valve. Where backflow is possible or check valve protection is required, confirm this option according to the differential pressure model.
Isolate, depressurize, and allow to cool before maintenance
Before removing the cover or internal components, isolate the system upstream and downstream of the valve, release residual pressure, and allow the valve body to cool before maintenance to prevent injury from the discharge of high-temperature, high-pressure steam or condensate.
FAQ
How does the IBV Z series steam trap operate, and where is it used?
The IBV Z series is an inverted bucket steam trap with an alloy steel body and cover and stainless steel internal parts. It is suitable for high-temperature, high-pressure saturated and superheated steam service. Low-friction moving internal components enable rapid opening and condensate discharge while minimizing steam leakage.
How should an IBV Z series model be selected, and what are the key considerations?
Selection should be based on the operating medium, temperature, differential pressure, and connection type. Consider the maximum operating pressure and temperature limits for each size and connection configuration, as well as the actual upstream pressure and back pressure used to determine the operating ΔP. The final configuration must be confirmed according to the specific model and application conditions.
What optional accessories are commonly available for the IBV Z series, and under what conditions are they used?
Common options include an integral stainless steel check valve, available only for models with a maximum differential pressure of 40 bar or higher, and tungsten-chromium-cobalt alloy discs and seats. Availability of specific options is subject to the model and pressure rating specified at the time of order.
What certifications and certificates are available for this product series?
The products are designed in accordance with ASME VIII and the European PED Directive. EN 10204 3.1 material certificates can be supplied when required. Certificate and inspection requirements must be specified when placing the order.
What should be considered when selecting the size and connection type for the IBV Z series?
Available sizes range from 1/2" to 3" and DN15 to DN80. Connection types include threaded, socket-weld, and flanged connections, with flanges available in the applicable ASME and EN ratings. When ordering, specify whether a weld-neck, butt-weld, or socket-weld connection is required, together with the selected flange rating.