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Pressure Relief Valve in heat jacketed design

  • 10% technology for minimum pressure increase up to full lift
  • extreme tightness, resulting in lowest possible product losses and reduced environmental pollution
  • set pressure close to opening pressure for optimum pressure maintenance in the system
  • high flow capacity
  • valve pallet is guided inside the housing to protect against harsh weather conditions
  • can be used in areas subject to an explosion hazard
  • complete heating jacket up to the flange to avoid ice build-up
  • maximum allowable heating medium temperature of 320°C / 608°F (at 6 bar / 87 psi)
  • available in a special design with a heatable valve cover
  • for low pressure settings, an optimized valve pallet cover prevents the set pressure from being adjusted due to dust deposits or condensate
  • sturdy housing design
  • available in a special design with lifting device

Функция и описание

The SD/BS-H type PROTEGO® valve is a highly developed pressure relief valve with a heating jacket down to the flange. It is primarily used as pressure relief device for vessels and process engineering equipment under difficult operating conditions. This includes extreme weather conditions or products that tend to form polymers at certain temperatures, stick together, or form deposits that negatively influence function (such as bitumen, tar, dust). The valve offers reliable protection against overpressure and prevents excessive loss of product vapors close to the set pressure.

The device will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift. Continuous investments in and a commitment to research and development have allowed PROTEGO® to develop a low pressure valve which has the same opening characteristic as a high pressure safety relief valve. With this “full lift type” technology, the valve can be set at just 10% below the maximum allowable working pressure of the tank and still safely vent the required mass flow.

Due to our highly developed manufacturing technology, the tank pressure is maintained up to set pressure with a tightness that is far superior to the conventional standard. This feature is achieved by valve seats made of high-grade stainless steel with precisely lapped valve pallets and a sturdy housing design.After the excess pressure is released, the valve re-seats and provides a tight seal again.

Таблица параметров

To select the nominal size (DN), use the flow capacity chart on the following page

DN1DN2ab b c d d e
bis 30 mbar> 30 mbarbis 30 mbar> 30 mbar
80 / 3"15 / ½"325 / 12.80400 / 15.75515 / 20.2870 / 2.76250 / 9.84390 / 15.35250 / 9.84
100 / 4"15 / ½"325 / 12.80400 / 15.75505 / 19.8860 / 2.36250 / 9.84380 / 14.96250 / 9.84
150 / 6"15 / ½"405 / 15.94460 / 18.11595 / 23.4360 / 2.36315 / 12.40470 / 18.50290 / 11.42
200 / 8"15 / ½"510 / 20.08470 / 18.50575 / 22.6465 / 2.56305 / 12.01445 / 17.52340 / 13.39
размер в мм * also available with special flange DN 50 / 2''

Выбор материала корпуса

Design AB
HousingSteelStainless Steel
Heating JacketSteelStainless Steel
Valve SeatStainless SteelStainless Steel
Special materials upon request

Material selection for pressure valve pallet

Design ABC
Pressure range [mbar]
[inch W.C.]
+5,0 up to +25
+2 up to +10
>+10 up to +30
>+4 up to +12
>+30 up to +210
>+12 up to +84
Valve palletAluminiumStainless SteelStainless Steel
Valve pallet hoodStainless SteelStainless Steel-
SealingMetal to MetalMetal to MetalMetal to Metal
Special materials and devices with higher set pressure or vacuum are available upon request

Вид фланцевого соединения

 EN 1092-1, Форма B1
ASME B16.5 CL 150 R.F.
other types upon request

Модели и спецификация

The valve pallet is weight-loaded. Starting at a set pressure of 30 mbar, a vane guide is also used.

Pressure valve in basic design with heating jacket


Additional special devices available upon request.



+5.0 mbar +210 mbar
+2.0 inch W.C. +84 inch W.C.
Higher pressure settings upon request.

Диаграммы пропускной способности

Диаграммы пропускной способности были определены с помощью калибрированной и сертифицированной объединением технического надзора (TÜV) проточной измерительной установки. Пропускная способность V. в м³/час определена воздухом при нормальных атмосферных условиях в соответствии с ISO 6358 (20°C, 1 бар). Преобразование для различных плотностей и температур см. главу 1: Технические основы