The Alfa Laval Safety Valve is a versatile hygienic spring-loaded relief valve that prevents pressure buildup in process tanks, vessels and equipment due to blocked discharge, thermal expansion, chemical reactions, or a combination of these events.
This safety valve is ideal for use in the dairy, food, beverage, biotechnology, pharmaceutical and many other industries.
Benefits
• Safe, reliable operation
• Hygienicdesign
• Prevents unsanitary leakage and overflow
• Safeguards both personnel and equipment against accidents due to overpressure
• Optional manual or automated overwrite for valve cleaning
Standard design
The Alfa Laval Safety Valve comes in sizes from DN25 to DN100 with a spring-loaded set pressure range from 0.2 to 12 bar. The valve can be operated either pneumatically or manually. It is delivered with PED certificate and complies with PED 2014/68/EU and EN 4126-1, fluid group II (non-hazardous fluids). It is available for pressure regulation of both liquids and gases. Please note that manual pressure regulation of gases has a reduced pressure range.
Working principle
The Alfa Laval Safety Valve prevents inadmissible overpressures of
fluids in tanks, containers and plant sections. It is factory-configured
with the specified set pressure that is greater than the operating
pressure. If the operating pressure rises above the set pressure, the
valve opens against the spring force to relieve pressure.
The valve should be installed in a vertical position for optimal
performance. If mounted in a horizontal position, the set pressure will
be somewhat lower than specified due to the lack of weight from the
piston. The highest effect is obtained using DN80 and DN100.
Technical Data:
- Temperature range: +5°C to +95 °C;
- Max. sterilisation temperature, dry steam: 140 °C (Max 30 min);
- Product wetted parts: 1.4404 (316L);
- Other steel parts: 1.4301 (304);
- Seals: EPDM;
- External finish: Ra 1.5-2.5 μm;
- Internal finish: Ra 0.8 μm;
- Connections: Liner/nut - male DIN 11851;
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