LESER Compact Performance Type 437 UK | ESI Technologies Group

LESER Compact Performance Type 437

The LESER Compact Performance Safety Valves Type 437 are designed for a wide range of industrial applications up to an F orifice. They open rapidly with a maximum overpressure of 10% and feature a blowdown of -10% for steam/gas and -20% for liquid service. Developed in collaboration with plant engineers and service specialists, these valves ensure reliable process and equipment protection. With global approvals, they are suitable for use worldwide.

Product Benefits

Adaptable Connections & Sizes: Threaded or flanged, 3/8″ to 1 1/2″ valves for varied installations.
Extreme Pressure Handling: Set pressures up to 800 bar / 11600 psig for high-demand environments.
Customisable for Any Need: Wide material and option selection to meet specific application requirements.
Extended Service Life: Stellited metal sealing for increased durability.
Optimal Leak Prevention: Soft seat options for enhanced tightness.
Simplified Stocking & Servicing: Single trim design for multiple media types.

Technical Data

Connection Sizes: Ranging from 3/8″ to 1 1/2″ with five orifice options (D through F) for high application suitability.
Threaded Connections: Available in male and female configurations, complying with all international standards for global applicability.
Flanged Connections: Designed according to ANSI, DIN, and JIS standards, ensuring worldwide compatibility.
Inlet Pressure Ratings: Up to PN 850, meeting all required design pressures.
Material Options:
- Inlet Body: Available in chrome steel and stainless steel.
- Standard Body: Options include ductile iron, steel, and stainless steel for application-specific selection.
- Special Materials: All parts can be machined from bar materials, offering fast lead times for special alloys such as Hastelloy®, Duplex, Super Duplex, Tantalum, and Titanium.
Set Pressure Range: 0.1 to 850 bar / 1.5 to 12,325 psig, making them suitable for diverse industrial processes.
Operating Temperatures: From -273 °C to +450 °C (-454 °F to +1022 °F, as per DIN EN), covering a broad range of applications.
LESER Nanotightness: Standard for metal-to-metal sealing, exceeding API 527 functional tightness requirements by 50%. This results in:
- Reduced atmospheric pollution.
- 50% lower medium loss.
- Increased plant efficiency.
Single Trim Design: One design and spring for steam, gas, and liquid applications, minimizing spare part requirements and reducing maintenance costs.
Ringless Design: No trim adjustments required, ensuring easy maintenance.
One-Piece Spindle: Reduces friction for high operational accuracy.
Self-Draining Design: Prevents medium accumulation, enhancing reliability.

Application

Thermal relief
Air/gas compressors and pumps
Technical gases and CO2 plants
LPG/LNG terminals, carriers, etc.
Chemical equipment and piping
Cryogenic systems and oxygen

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