High EfficiencyType 712

Supplementary loading system for operation at up to 97% of the maximum permissible operating pressure. Technical data

  • Higher process productivity due to operation of the system to be protected closer to the maximum permissible operating pressure (PB) (up to 97%)
  • less media loss when opening and closing the Safety valve. Both opening and closing times are shortened
  • reduced noise emissions, as the opening and closing times of the Safety valve are shortened
  • Complete tightness up to set pressure - The Safety valve remains tight even at pressure peaks that occur below the set pressure.
  • less wear of the Safety valve, as no simmering occurs before the Safety valve responds

  • CE_Europa_schwarz
  • VdTUEV
  • UKCA_Grossbritanien_schwarz
LESER High Efficiency Supplementary Loading System
HESLSPNEU71219080Rendering

Applications & Industries

  • Chemistry
  • Energy
  • Cell and paper industry
  • Urea

The optimal solution for:

  • operation at up to 97% from set pressure
  • Complete tightness to set pressure
  • Back pressures also >50% possible
DESY BASF_inv SKW Piesteritz

Technical features type 712

Set pressure(according to CE) 0.1 - 250 barg | 1.5 - 3.626 psig
Set pressure (according to ASME) 0.1 - 250 barg | 1.5 - 3.626 psig
Temperature(according to CE) -40 - 550 °C | -40 - 1,022 °F
Temperature(according to ASME) -40 - 538 °C | -40 - 1,000 °F
Capacity orifice D - T
Connections DIN EN 1092 DN 25 - DN 400
Connections ASME B16.5 NPS 1 to NPS 16
Flange class Inlet DIN EN 1092 PN 10 - PN 400
Flange class Inlet ASME B16.5 Class 150 - Class 2500
Body material 0.6025, 0.7043, 1.0619, 1.4408, 1.7357 | Gr. 60-40-18, SA 216 WCB, SA 351
CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN
(Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀ 14 - 295 mm | 0.55 - 11.61 in
Narrowest flow area A₀ 154 - 68347 mm² | 0.239 - 105.938 in²
Bellows material Stainless steel , INCONEL® 625LCF
Seat gasket Soft sealing, Metallic, Sealing plate


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High Efficiency Catalogue Suplementory Loading System

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Calculation of safety valves with LESER-Valvestar

Sizing and selection

Sizing and selection of your LESER Safety valve with VALVESTAR® - The Sizing Program

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