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CRITICAL SERVICE

Pressure relief valves with PTFE-lining for corrosive media

LESER Critical Service pressure relief valves
  • Medium-touched components made of corrosion resistant PTFE

  • Pressure relief valve for the protection of highly corrosive media

  • Cost-effective alternative to high-alloyed materials

  • ATEX-compliant version in electrically conductive PTFE possible

Industries

Approvals

LESER Critical Service pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations

ce-mark logo

UV

asme logo
EAC logo

Valve Types

Type 447 >

PTFE-full lining at the inlet and outlet area for highly corrosive medium

DN 25 - DN 100 (1" - 4")

Type 449 >

Block body valve with flushing protective gas, all special materials available

DN 25 - DN 100 (1" - 4")

Technical Specifications for Critical Service

Nominal Diameter at Inlet

DN 25 - DN 100 | 1" - 4"

Actual Orifice Diameter d₀

23 mm - 92 mm | 0.91 in - 3.62 in

Actual Orifice Area A₀

415 mm² - 6.648 mm² | 0.645 in² - 10.304 in²

Pressure

0.1 bar - 16 bar | 1.45 psig - 232 psig

Temperature (in accordance with DIN EN)

-85 °C to 200 °C | -121 °F to 392 °F

Body Material

1.0460, 1.0619 | SA 105, SA 216 WCB

Valve Connection

Flange in accordance with DIN EN 1092-1 and ASME B 16.5

Bellows Material (optional)

Stainless steel, PTFE, Hastelloy C276

Load Type

Spring-loaded

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Downloads

In our comprehensive download area you will find all necessary documents and detailed information on safety valves you need.

LESER critical service product brochure
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