Safety Valve
The Alfa Laval Safety Valve protects your equipment, your environment, and the health and safety of your workers. This safety device is designed to open and relieve excess pressure from vessels or equipment and then reclose and prevent the further release of fluid when the system returns to normal.
Related Industries:
Food and Beverage, Dairy Processing
Relieve excess pressure
Pressure can build inside vessels or systems due to blocked discharge, thermal expansion, chemical reactions, or a combination of these events. The Alfa Laval Safety Valve is designed to flexibly relieve excess pressure from vessels or equipment at all times and under any circumstances. As the last and vital component in accident prevention, a high-quality, hygienic safety valve is an essential part of your operations.
Get the perfect fit
Depending on the causes of excess pressure, a different mass or volume flow may need to be discharged. With this type of variable flow, a perfectly fitted safety valve is essential. The Alfa Laval Safety Valve comes in sizes from DN25 to DN100 with a spring-loaded set pressure range between 0.2 and 12.0 bar depending on the size of the valve.
Reliable protection
In a potentially dangerous situation, the Alfa Laval Safety Valve is designed to open at a predetermined set pressure. The compressed spring force, which keeps the valve closed below the set pressure, is forced open when pressure builds up at the inlet of the safety valve. As these forces balance out, the valve will discharge and decrease pressure, ultimately reclosing as the system returns to normal.
Concept
The Alfa Laval Safety Valve is a spring loaded safety valve used to
prevent overpressure in tanks and vessels in the dairy, food and
beverage, and biopharm industries to reliably avoid damages to human
beings and equipment.
Working principle
It is used to prevent inadmissible over pressures of fluids in tanks,
containers and plant sections. From the factory the valve is configured
with a set pressure upon request that is greater than the operating
pressure. The valve opens against a spring force if the operating
pressure increases the set pressure. Preferably, the Alfa Laval Safety
Valve should be installed vertically. If mounted horizontal the set
pressure will be a bit lower than specified due to the missing weight of
the piston. Highest effect on DN80 and DN100.
Standard Design
The Alfa Laval Safety Valve comes in sizes from DN25 to DN100
with spring loaded set pressure range from 0.2 to 12 bar. The valve
can be pneumatic or manually operated. Alfa Laval Safety Valve is
delivered with PED certificate. Compliance to EN 4126-1 Compliance
to PED 2014/68/EC of the European Community. Fluid group II
(Non-hazardous fluids).
The safety valve is available for both liquids and gases*
Technical Data
Temperature
Temperature range: . . . . . . . . . . . . . . . . .+5°C to +95 °C
Max. sterilisation temperature, dry steam: . .140 °C
*DN25 for gas applications is only available for set pressure up to 1.5
bar
PHYSICAL DATA
Materials
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
Option:
Inductive sensor for feedback is available for standard and pneumatic
lifting – see instruction manual for detail.
