The LESER 4594.2132 safety relief valve is part of the Type 459 Compact Performance series, designed for reliable overpressure protection in industrial systems handling gases, vapors, and liquids.
Engineered for medium-capacity applications, this spring-loaded valve provides fast opening response and stable reseating, ensuring safe operation of pressure vessels, pipelines, and process systems. The 4594 variant features stainless steel construction, offering superior corrosion resistance for demanding environments.
With flexible configuration options and compliance with international standards, this valve is widely used across chemical processing, oil & gas, energy, and industrial applications.
Key Features
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Spring-loaded safety relief valve for overpressure protection
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Compact design with high capacity relative to size
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Stainless steel construction (Type 4594) – enhanced corrosion resistance
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Fast opening with low overpressure (~5%) – precise protection response
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Metal seat or soft seal options for tight shut-off
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Wide configuration flexibility (connections, materials, pressure ranges)
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Suitable for gas, liquid, and steam service
Pressure & Temperature
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Set Pressure Range:
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0.2 – 250 bar (2.9 – 3626 psig)
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Operating Temperature:
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-273°C to +450°C (depending on standard/configuration)
Mechanical
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Connection Size:
- Threaded: 1/2" – 1 1/2"
- Flanged: DN15 – DN25
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Orifice Diameter (d₀): 9 – 17.5 mm
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Orifice Area (A₀): 63.6 – 241 mm²
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Flange Rating: PN 40 – PN 400 / Class 150 – 2500
