Industrial Safety Relief Valve Selection and Installation Guide | Like Valves
Industrial Safety Relief Valve Selection and Installation Guide | Like Valves
Safety relief valves serve as the ultimate safety barrier for piping systems and pressure vessels. In high-pressure industrial sectors such as petrochemicals, power generation, and boiler systems, these valves automatically open to relieve excess pressure when system thresholds are exceeded, effectively preventing equipment overpressure damage or catastrophic explosions. As legally mandated core safety accessories, their reliability is directly tied to the secure operation of the entire production system.
Overview of Working Principles
Under normal operating conditions, the spring force (or weight force) exceeds the medium pressure, keeping the valve disc tightly closed. When the system pressure rises to the set pressure, the medium pressure overcomes the spring force, pushing the valve disc open to release the excess medium. Once the system pressure drops back to a safe level, the spring force forces the valve disc to automatically reseat and restore system sealing.
Core Product Lines by Like Valves
To meet diverse operational requirements, Like Valves offers a comprehensive range of safety relief valve solutions:
1，Spring-Loaded Full-Lift Safety Relief Valves
Features: Engineered with a large discharge area and capacity, specifically designed for gas and steam applications.
Specifications: Size Range DN15 - DN200, Pressure Class PN10 - PN320, Set Pressure 0.1 - 32 MPa.
2，Spring-Loaded Low-Lift Safety Relief Valves
Features: Designed with a smaller lift height and moderate discharge capacity, primarily suitable for liquid media applications.
Specifications: Size Range DN15 - DN100, Pressure Class PN10 - PN160, Set Pressure 0.1 - 16 MPa.
3，Balanced Bellows Safety Relief Valves
Features: Incorporates an internal balanced bellows structure that effectively isolates backpressure interference, ensuring precise valve actuation.
Applications: Ideal for complex piping networks experiencing significant backpressure fluctuations. Size Range DN25 - DN150.
4，Safety Relief Valves with Cooling Fins (Heat Sinks)
Features: Equipped with highly efficient cooling fins on the bonnet to drastically reduce heat transfer to the spring chamber, protecting the spring from high-temperature annealing and failure.
Applications: Designed for high-temperature media (>350℃). Size Range DN25 - DN150, with a maximum temperature tolerance of up to 500℃.
Frequently Asked Technical Questions (FAQ)
Q1: What are the regulations regarding safety relief valve calibration cycles?
In accordance with special equipment regulations and international standards, safety relief valves typically require calibration at least once a year (either online or offline). To ensure compliance and safety, it is recommended that calibrations be performed by qualified third-party inspection agencies. Laike Valves provides professional calibration assistance and technical support services for clients worldwide.
Q2: How should the set pressure of a safety relief valve be determined?
Generally, the set pressure is established at 1.05 to 1.1 times the system's design pressure, and must never exceed the vessel's own design pressure. The exact value requires comprehensive calculation based on process characteristics, operating temperatures, and relevant industry standards. Evaluation and confirmation by professional engineers are strongly advised.
Q3: Can safety relief valves be installed in series or in parallel?
To increase the total discharge capacity of a system, safety relief valves are generally permitted to be installed in parallel. However, installing them in series is not recommended under most engineering codes; if series installation is absolutely necessary due to specific process requirements, rigorous fluid dynamics design and calculation verification must be conducted. The engineering team at Laike Valves can provide customized piping configuration solutions.
About Like Valves
Like Valves is a dedicated manufacturer providing premium fluid control solutions for global industrial applications. Adhering strictly to our philosophy of "Precision Manufacturing · Quality First" and complying with international quality standards, we deliver reliable products and expert technical services. Whether you require standard product procurement or complex application selection support, Like Valves is your trusted partner.
For the latest product catalogs, detailed technical specifications, or project quotations, please feel free to contact us through our official website or via our dedicated communication channels.
LIKE Valves(TianJin) Co.,Ltd
Web: www.likvchina.com
Telephone：+86-22--88526609
Email：sales3@likevalves.com