Safety valve supplier in Algeria
                     Safety valve supplier in Algeria
https://www.africanvalve.com/product-category/safety-valve/ 
        African valve is the leading  Safety va
lve supplier in ALGERIA. A safety valve is a valve that acts as fail 
safe. An example of safety valve is a pressure relief valve (PRV), 
which automatically releases a substance from a boiler, pressure 
vessel, or other system, when the pressure or temperature 
exceeds preset limits. Pilot oprated valve are a specialized type 
of pressure safety valve. A leak tight, lower cost, single 
emergency use option would be a rupture disk. 
         A safety valve is a device that automatically releases fluid 
or gas from a system when the pressure or temperature exceeds 
a set limit. Safety valves are used to prevent equipment damage 
or explosion, and are often installed in pressure vessels like 
boilers, gas storage tanks, and chemical plants.  
 
 
WORKING
● When the pressure exceeds the set limit, the valve's disc lifts off 
its seat.  
● The valve maintains a balance between the pressure inside the 
system and the force of a spring or weight mechanism.  
● The valve opens, allowing excess fluid to escape and releasing 
pressure. 
● When the pressure returns to a safe level, the valve closes again 
● Once the pressure drops back to a safe level, the spring force 
pushes the disc back onto the nozzle, closing the valve. 
ADVANTAGE
● Safety valves only have mechanical parts, so they can still operate if 
electronic or pneumatic safety devices fail. 
● Safety valves are fully actuated by the system's media, so they can 
continue to work even if there is a power failure. 
● Safety valves can prevent pressure increases that can lead to 
explosions, fire hazards, or malfunctions.  
● Safety valves are often made from materials like stainless steel, 
aluminum, and cast iron, which makes them resistant to corrosion and 
temperature 
● Safety valves are used in many industries, including oil and gas, power 
plants, HVAC systems, and food and beverage.  
● Safety valves only have mechanical parts, so they can still operate if 
electronic or pneumatic safety devices fail. 
● Rapid opening or pop action 
● Opening in proportion to the increase in pressure 
 
INDUSTRY
● Opening in proportion to the increase in pressure 
● Safety valves are used in oil and gas refineries, offshore oil wells, 
and other applications 
● Safety valves are often used in power plants for compressible 
gasses like steam and air.  
● Safety valves are used in irrigation and precision farming 
applications 
● Safety valves are used in HVAC systems to relieve pressure when 
there is a blocked discharge, thermal expansion, or external heat. 
● Safety valves are also used in other industries, including pulp and 
paper, metals and mining, and textiles 
 
FEATURES
Safety valves have five key components: a disc, a spring, a spindle, an adjusting 
screw, and a nozzle.  
Safety valves open quickly and completely when pressure exceeds a predetermined 
limit. This is because the valve's disc has a larger diameter than the nozzle, which 
allows the disc to lift and increase the surface area for the medium to reach.  
Safety valves are spring-loaded pressure relief valves that use a spring to keep the 
valve closed under normal conditions. When pressure exceeds the limit, the spring 
compresses and overcomes its resistance, allowing the valve to open.  
Safety valves can be made from a variety of materials, including stainless steel, EPDM, 
Viton, and Nitrile. The material used depends on the application, such as water, high-
temperature gas, air and oil, or steam.  
Safety valves come in two main designs: side-rod and yoke. Side-rod construction is 
suitable for high-pressure and temperature applications, while yoke design is used for 
lower pressure and temperature applications.  
PARTS
● Valve body 
● Valve seat 
● Stem 
● Spring or weight mechanism 
● Nozzle 
● Disc 
● Bellows vent 
 
APPLICATION
● Safety valves are commonly used in boiler drums, superheaters, 
reheaters, economizers, and feedwater heaters. 
●  Safety valves are used in metal and mining industries 
● Safety valves are used in textiles industries. 
●  Chemical: Safety valves are used in these industries. 
● Pulp and paper: Safety valves are used in these industries 
● Refining and petrochemical: Safety valves are used in these 
industries. 
 
TYPES
● Steam safety valve 
● Thermal safety valve 
● Conventional Safety Valve 
● Pressure safety valve 
● Bellow seal safety valve 
● Pilot operated safety valve 
● Spring loaded safety valve 
Difference between safety and pressure relief valve  
The main difference between a safety valve and a pressure relief 
valve is that a safety valve is designed to immediately release 
pressure in an emergency, while a pressure relief valve is designed 
to control pressure in a system:  
Safety valve 
African valve is the topmost Safety valve supplier in ALGERIA. 
Designed to release pressure quickly in the event of an emergency 
or system failure. Safety valves are often used in gas systems and 
open with a popping sound. 
 
Pressure relief valve 
Designed to control pressure in a system by opening gradually to 
release excess pressure. Pressure relief valves are often used in 
liquid systems and open gradually.  
Here are some other differences between safety valves and 
pressure relief valves: 
How they open 
Safety valves open rapidly and fully, while pressure relief valves 
open gradually and incrementally.  
When they open 
Safety valves open a small amount before the pressure reaches 
the setpoint, while pressure relief valves open at the setpoint.  
What they do with the released pressure 
Safety valves release a volume of fluid from the plant, while 
pressure relief valves can relieve the flow to the atmosphere or 
to a line that returns the gas to its original source.  
DESCRIPTION
Body Material: Cast Iron and Steel (A216 WCB, WCC, LCB, LCC,WC6, WC9), 
Ductile Iron, Stainless Steel [SS316, SS304, SS316L,SS904L, CF8, CF8M, 
F304, F316, F31L, F51, F3, F55, F91] , WCB, WC6,SS304, SS316, DUPLEX 
STEEL. 
Class: 150 – 2500 
PN 10: PN 450 
Size:  ½ - 24” 
Ends: Butt welded, Socket welded, Flanged, Threaded 
Visit us https://www.africanvalve.com/product-category/safety-valve/ 
Location : 42, Local Airport road Ikeja, 300001, Lagos, Nigeria