LESER 4594.2142 L20L44MA3H01

LESER 4594.2142 High-Pressure Safety Relief Valve

Description

The LESER Type 4594.2142 is a robust and reliable safety relief valve from the Compact Performance series, engineered for high-pressure applications. Constructed from high-grade 1.4404 / 316L stainless steel, it offers excellent corrosion resistance and durability. This valve is designed to protect pressure vessels and piping systems from overpressure by automatically discharging excess pressure.

Specifications

• Set Pressure: 330 bar (4786.2 psig)
• Inlet Connection: G 1/2 inch
• Outlet Connection: G 1 inch
• Body Material: 1.4404 / 316L Stainless Steel
• Flow Area: 63.6 mm2
• Orifice (d0): 9.0 mm
• Temperature Range: up to 20 deg C (68 deg F) per tag
• Pressure Rating Inlet: PN 500
• Pressure Rating Outlet: PN 160

Label Info

• Manufacturer: LESER
• Type: 4594.2142
• Serial Number: 11612887
• Job Number: 20428734/10
• Configuration Code: L20L44MA3H01
• Date of Manufacture: October 2019

Application

This valve is ideally suited for pressure protection in various industries, including chemical, petrochemical, oil and gas, and power generation, especially in systems handling high-pressure liquids and gases.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this refurbished or surplus valve, you are contributing to a circular economy and avoiding approximately 5.0 kg of CO2 emissions associated with the production of a new one.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
Can the set pressure of this valve be adjusted?
Answer:

Safety relief valves are factory-set and sealed to a specific pressure (330 bar in this case). Adjusting the set pressure requires specialized equipment and expertise, and it will break the factory seal. Any modification must be done by an authorized service center to ensure safety and compliance with regulations.

Question?
What does the body material 1.4404 / 316L signify for this valve’s application?
Answer:

The use of 1.4404 / 316L stainless steel provides excellent corrosion resistance against a wide range of chemicals, acids, and saltwater. This makes the valve suitable for demanding environments such as chemical processing, offshore applications, and the food and beverage industry, where material purity and resistance to aggressive media are critical.

Question?
Is this valve suitable for both liquid and gas service?
Answer:

Yes, the data plate indicates performance coefficients for steam, gas, and liquid (0.83 for gas, 0.61 for liquid). This means the valve has been tested and certified for use with all three media types, making it a versatile choice for various overpressure protection scenarios.

Last Update: Friday, March 13, 2026

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