t + 44 (0) 23 8066 9666

f + 44 (0) 23 8066 9606

sales@johnsonvalves.com

Valves - Leser Safety Relief Valves

Safety Relief Valves

As industrial development has progressed, the demands for safety have continuously increased. Step by step, LESER has developed its safety valves to reflect the state of the art and extended its product range to provide solutions for all sectors of industry. All safety relief valves are set to your required blow off pressure and supplied with a test and conformity certificate.

Overhaul, Testing & Resetting Service

We can also offer an overhaul, resetting and testing service of your existing valves, in our workshops.

Part No. 437 & 459 Series

Leser Compact Performance Safety Relief Valves

The 437 & 459 Leser series of safety relief valves are used for handling small and medium mass flows. They have the advantage of low weight and compact dimensions.

• Available in sizes 10mm to 40mm

• Threaded or flanged connections

• Set pressure range: up to 800 bar

• Various materials to cover a broad range of applications

^{Compact Performance Catalogue (PDF)}

Part No. 441, XXL & 444 Series

Leser High Performance Safety Relief Valves

These safety relief valves are used in particular for vapours and gases, in applications where the maximum mass flow has to be discharged rapidly.

• Available in sizes 20mm to 400mm

• DIN & ANSI flanges available

• Set pressure range: up to 51 bar

• Various materials to cover a broad range of applications

^{High Performance 1 Catalogue (PDF)}

Part No. 441 Full Nozzle & 458 Series

Leser High Performance Safety Relief Valves

The 441 Full Nozzle safety relief valve is used where a full nozzle design is required. The 458 series is generally used in power station and industrial superheated steam generators.

• Available in sizes 20mm to 150mm

• DIN & ANSI flanges available

• Set pressure range: up to 300 bar

• Various materials to cover a broad range of applications

^{High Performance 2 Catalogue (PDF)}

Part No. 526 Series

Leser API Safety Relief Valve

The 526 safety relief valve is designed  according to the API Standard 526; predominantly applicable for the petrochemicaland chemical industries.

• Available in sizes 25mm to 200mm

• Designed according to API 526

• Set pressure range: up to 413 bar

• Various materials to cover a broad range of applications

^{API Catalogue (PDF)}

Part No. 532 & 534 Series

Leser In-Line Safety Relief Valves

The 532 & 534 in-line type safety relief valves are suitable for many applications including steam, gases and liquids.

• Available in sizes 20mm to 150mm

• PN16/40 flanges available

• Set pressure range: up to 40 bar

• Various materials to cover a broad range of applications

^{S & R Catalogue (PDF)}

Part No. 543 & 544 Series

Leser Marine Style Double Safety Relief Valves

These 543 & 546 series of double safety relief valves are Lloyds approved, generally used on marine application.

• Available in sizes 20mm to 100mm

• PN40 inlet x PN16 outlet

• Set pressure range: up to 40 bar

• Various materials to cover a broad range of applications

^{S & R Catalogue (PDF)}

Home   Site Map   Contact Us

© 2007, G.J. Johnson & Sons Ltd, Unit 7 Trinity Court, Calmore Industrial Estate, Totton, Southampton, UK, SO40 3WX

To view our data sheets, you will need Adobe Reader version 5.0 or later