VYC-Industrial - Model 496 EN - Full Lift Safety Valve with Spring Loading
From Valves - Safety Valves and Pressure Relief
The Mod. 496 EN safety valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally. Design in accordance with “International Standard ISO 4126-1 Safety Valves”.
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What are safety valves and what are they for?
Safety valves or pressure relief valves are pressure regulating devices that are responsible for expelling excess pressure from the system when the maximum pressure levels for which they have been designed are exceeded, usually due to a
failure, thus avoiding the risk of malfunction and even explosion in extreme cases.
This type of valve is essential in all installations (boilers, pipe lines, storage tanks…) containing fluids at unacceptable pressures.
How do safety valves work?
Safety valves perform their function when the pressure of the system where the fluid is contained, becomes higher than the maximum set pressure of the valve previously adjusted. When the system pressure is higher than the valve’s set
pressure, this opens, releasing the excess pressure to the atmosphere or to containment tanks, depending on the toxicity of the fluid. After releasing the excess, the valve closes again and the system pressure returns to normal.
To ensure total safety of personnel and installation, make sure that the valves have passed all safety tests and meet the requirements of the system where they are to be installed. All our valves are supplied with certificates of materials, cas-
tings and test report according to EN-10204 3.1. and are designed according to ISO 4126-1
What is the difference between the instantaneous full opening safety valve AIT (PSV) and the normal opening relief valve AN or progressive opening relief valve AP (PRV)?
The main difference between these two types of valves lies in the opening speed when encountering a pressure increase in the circuit.
The Pressure Safety Valve (PSV) opens instantaneously and fully upon reaching the set pressure for which it is designed, expelling the excess pressure from the system immediately. They are optimised for use with steam or gases.
They may be equipped with a manually operated lever to open at lower pressures than the set pressure.
In contrast, the normally or progressively opening Pressure Relief Valve (PRV) opens gradually as the system pressure rises above the set pressure of the valve above its setting. They are optimised to work with liquids.
At VYC Industrial we are specialists in the design and manufacture of all types of safety valves. We have a wide range of safety valves to cover all the needs of the sector.
Contact us or ask for an estimate without obligation by filling in the form, writing to info@vycindustrial.com or calling +93 735 76 90.
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