Features of excess pressure valves, models S1 and S2

At Valfonta, we are dedicated to the manufacturing and development of mechanisms for pressure control, ensuring greater effectiveness and efficiency in distribution systems and installations where fluids of different characteristics circulate.

We have specialized in the design, manufacturing, and customization of pressure reducing valves and pressure relief valves. Our ability to provide tailored solutions is based on a deep understanding of the varied and sometimes complex needs of different systems and installations.

The use of regulating valves is essential in the efficient and safe management of any fluid system. They not only control pressure but also prevent damage to pipelines and minimize fluid and gas losses and leaks. In this way, they contribute to operational efficiency, machinery safety, and environmental protection

Table of contents

Distribution networks, especially in the industrial sector, are often complex and may have areas where the pressure is higher than what pipelines or equipment can safely withstand. This can happen for various reasons, such as proximity to pumping stations or being located in low elevation geographic areas where pressure can accumulate.

In these situations, pressure reducing valves become absolutely critical. They are capable of reducing the pressure within the system to a safe level, preventing the risk of pipe ruptures caused by excessive pressure. Additionally, they help prevent the leakage of any fluid or gas circulating through the system, safeguarding both the system’s integrity and the environment as a whole.

In summary, at Valfonta, we strive to produce the highest quality valves that provide precise and reliable pressure regulation, ensuring the efficiency and safety of your systems and installations.

In this post, we will showcase the features and differences between two of our most common pressure relief valve models, the S1 and S2 models. These are just two options from our extensive valve catalog. Feel free to request more information and personalized advice to help you choose the right valve for your specific needs.

It is a self-operated pressure relief valve. This series of control valves is suitable for vapor, compressed air, non-hazardous gases, and liquids. It has a very rapid response to demand. It features a single-seated globe valve. The stem is sealed by a double-layer bellows.

It is manufactured in stainless steel, and to prevent any damage to the bellows, the S1 series is equipped with an anti-rotation system. The diaphragm is reinforced with an intermediate lining. The regulation range is between 0.5 and 15 barg with different actuators. The valve opens when the upstream pressure increases. Maximum inlet pressure is 15 barg.

Other configurations:

Self-operated pressure relief valve. Its main function is to maintain the inlet pressure at an adjusted maximum value, relieving excess pressure downstream through the regulation axis.

When the inlet pressure increases beyond the set value, the valve opens proportionally to the detected pressure increase.

This model of S2 pressure regulators is suitable for low-temperature vapor (with condensation tank), compressed air, gases, and liquids.

The actuator is equipped with a high-quality reinforced membrane with an intermediate fabric layer. Its regulation range for the inlet pressure varies from 0.02 to 10 barg, depending on the different sizes of actuators.

The condensation tank is available and necessary when the fluid is vapor or for liquids with a temperature higher than 125º C to protect the membrane from overheating.

It is important to mention that the pressure relief valve is not a safety valve, and when necessary, an overpressure protection should be installed.

The applications of this type of valve are that it allows an area with excess pressure to feed another area with lower pressure, without leaving the main line undersupplied. In case of excessive consumption, it prevents overpressures.