Leser Type 441

The Safety Relief Valve Type 441, 442 is engineered for effective pressure management, capable of operating within a pressure range of 0.1 to 40 bar (1.5 to 580 psig) according to CE standards and 1 to 40 bar (15 to 580 psig) for ASME. With an extensive temperature range from -270 to 450 °C (-454 to 842 °F) under CE and -268 to 538 °C (-450 to 1000 °F) under ASME, this valve is suitable for extreme operating conditions.

Manufactured from durable materials including 0.6025, 0.7043, 1.0619, and 1.4408, this valve ensures long-lasting performance. It features a seal design available in metallic, plate, or soft options, accommodating diverse sealing needs. The connections adhere to DIN EN 1092 and ASME B16.5 standards, with flange classes ranging from PN 10 to PN 40 for DIN and Class 150 to Class 300 for ASME.

With a flow diameter varying from 18 to 295 mm (0.71 to 11.61 inches) and a flow area from 254 to 6,834.7 mm² (0.394 to 105.938 in²), the valve demonstrates high operational efficiency. The inclusion of stainless steel and elastomer bellows materials enhances its performance in challenging environments.