The Spirax Sarco SVL488 is a stainless steel safety valve for clean systems, with a body pressure rating of PN16. It features a 1.4404 stainless steel body and FDA-certified EPDM seals. The wetted surfaces have a roughness of 0.75 µm Ra, meeting hygienic standards, and the valve is available with flanged or clamp connections. It is suitable for pressure vessels and pipelines in brewing, beverage, and clean-process applications, providing precise overpressure protection for steam, gas, and liquid systems.
SVL488 stainless steel safety valve, 3/4-inch angle pattern | Spirax Sarco
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SVL488 Stainless Steel Safety Valve for Clean Systems | Spirax Sarco
Full-lift stainless steel safety valve for overpressure protection in clean steam, gas, and liquid systems.
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Model confirmation
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After-sales support
After-sales communication support is provided according to the order agreement.
Specifications
- Valve body design rating
- PN16
- Set pressure range
- DN25/DN40: 0.1-16 bar g, DN50: 0.2-15 bar g, DN65/DN80: 0.1-10.34 bar g, DN100: 0.1-8.2 bar g
- Operating temperature range
- -45°C to 150°C (EPDM soft seal), -45°C to 180°C (Viton soft seal)
- Overpressure
- 10% (steam/gas/liquid)
- Blowdown
- 10% (steam/gas), 20% (liquid)
- Rated discharge coefficient
- 0.70 (steam/gas), 0.45 (liquid)
- Maximum allowable back pressure
- 10% of set pressure
- Cold water pressure test pressure
- 24 bar g
- Valve body material
- Stainless steel 1.4404
- Seal material
- EPDM (FDA certified)
- Wetted surface roughness
- 0.75 µm Ra
- Connection type
- DIN 2633 PN16 flange / ISO 2852 sanitary clamp
- Inlet size
- DN25, DN40, DN50, DN65, DN80, DN100
- Outlet size
- DN40, DN65, DN80, DN100, DN125, DN150
- Flow passage diameter
- 23 mm (DN25/40) to 92 mm (DN100/150)
- Flow area
- 416 mm² (DN25/40) to 6648 mm² (DN100/150)
- Maximum steam pressure with soft seal
- 4 bar g (EPDM)
- Certification
- TÜV (AD Merkblatt A2, TRD412), PED 97/23/EC Cat.4
Application scenarios
Overpressure protection for low-pressure steam equipment, process piping and pressure vessels in the brewing and beverage industries
Used to protect low-pressure steam equipment, process piping and pressure vessels against overpressure in brewing and beverage applications where high standards of hygiene and cleanliness are required. The safety valve is suitable for steam, gas and liquid systems and features a stainless steel valve body with an FDA-certified EPDM soft seal to help reduce process media contamination.
Gas or liquid overpressure protection for clean-process pressure vessels
Used for overpressure relief of gas or liquid media in clean-process pressure vessels. Product documentation specifies suitability for pressure vessel overpressure protection in steam, gas and liquid systems, with TÜV and PED certification.
Overpressure protection for clean-process piping
Used for overpressure protection and safety relief in clean-process piping. Product documentation specifies suitability for piping overpressure protection and provides DIN 2633 PN16 flange or ISO 2852 sanitary clamp connections.
Selection points
Clean-service wetted surface finish
The valve body is made of stainless steel 1.4404, with a wetted surface roughness of 0.75 µm Ra and an FDA-certified EPDM soft seal. It is suitable for clean-process applications such as brewing and beverage production, where hygiene and process media contamination control are important.
Full-lift discharge performance for steam, gas and liquid service
A full-lift safety valve suitable for steam, gas and liquid systems, with a rated discharge coefficient of 0.70 for steam/gas and 0.45 for liquid. Overpressure is 10% for steam/gas/liquid, with a blowdown of 10% for steam/gas and 20% for liquid.
Dual connection configuration with sanitary clamp and PN16 flange
Both DIN 2633 PN16 flange and ISO 2852 sanitary clamp connections are available, allowing the configuration to be selected according to the existing piping interface and hygiene requirements.
Operating limits for soft-seal temperature and steam pressure
The operating temperature range is -45°C to 150°C with an EPDM soft seal and -45°C to 180°C with a Viton soft seal. The maximum steam pressure with an EPDM soft seal is 4 bar g.
Installation & maintenance notes
Control discharge back pressure
The discharge piping and downstream operating conditions must ensure that the safety valve back pressure does not exceed 10% of the set pressure, preventing adverse effects on normal valve discharge and overpressure protection performance.
FAQ
Is the SVL488 more suitable for steam, gas or liquid systems?
The SVL488 is suitable for steam, gas and liquid systems and is primarily used for overpressure protection of low-pressure steam equipment, piping and pressure vessels. Media compatibility must be confirmed with reference to the specific model and application conditions.
What is the difference between the SVL488-B and SVL488-C, and how should they be selected?
The SVL488-B has a closed bonnet design and is more suitable for liquid systems. The SVL488-C has a packed gland and lifting lever design and is more suitable for steam or other systems requiring lever operation. The design should be selected according to the media type and operating requirements.
What are the application features of the SVL488 in sanitary or clean-process applications?
The SVL488 has a stainless steel valve body and is available with an ISO 2852 sanitary clamp connection, making it suitable for process applications with stringent hygiene and cleanliness requirements, such as brewing and beverage production. Its design helps reduce the risk of process media contamination and supports clean-system applications.
What should be considered when installing the SVL488?
During installation, ensure that the centreline of the safety valve spring chamber is vertical and points upward. Specific installation, commissioning and maintenance requirements must be confirmed with reference to the specific model and application conditions.
Which key parameters must be confirmed when selecting the SVL488?
Selection requires confirmation of the model design, seal material, inlet connection type, size and set pressure. The series is available with PN16 flange or ISO 2852 sanitary clamp connections; the specific configuration must be confirmed according to the actual model and application conditions.