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Vacuum Relief Valve in a special heat jacketed design

  • excellent tightness resulting in lowest possible product losses and reduced environmental pollution
  • high flow capacity
  • valve pallet is guided inside the housing to protect against harsh weather conditions
  • can be used in explosion hazardous areas
  • 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)
  • a special design that preheats incoming air is also available
  • available in a special design with a heatable valve cover
  • a valve pallet cover prevents the adjustment of the set pressure due to dust deposits or condensate
  • sturdy housing design
  • available in a special design with lifting device

Función y Descripción

The SV/T-0-H type PROTEGO® valve is a highly developed vacuum relief valve with a valve housing that is equipped with a heating jacket that can be heated up to the flange. It is primarily used as a device for in-breathing in tanks, containers, 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 vacuum and prevents air intake almost up to the set vacuum.

When the set vacuum is reached, the valve starts to open and reaches full lift within a 40% vacuum increase. Up to the set vacuum, the tank vacuum is maintained with a seal that is far superior to the conventional standard due to the highly developed manufacturing technology. This feature is achieved by valve seats made of high quality stainless steel with precisely lapped valve pallets and a sturdy housing design. After the vacuum is released, the valve re-seats and again provides a tight seal.


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

DN180* / 3"*100 / 4" 150 / 6" 200 / 8" 250 / 10"
DN215 / ½"15 / ½"15 / ½"15 / ½"15 / ½"
a570 / 22.44570 / 22.44720 / 28.35920 / 36.221050 / 41.34
b275 / 10.83275 / 10.83355 / 13.98405 / 15.94508 / 20.00
c70 / 2.7670 / 2.7660 / 2.3670 / 2.7670 / 2.76
d440 / 17.32440 / 17.32590 / 23.23790 / 31.10920 / 36.22
e450 / 17.72450 / 17.72650 / 25.59750 / 29.53950 / 37.40
f225 / 8.86225 / 8.86260 / 10.24300 / 11.91350 / 13.78
Dimensiones en mm / pulgadas * also available with special flnage DN 50 / 2''

Selección de materiales para la vivienda

HousingSteelStainless Steel
Heating jacketSteelStainless Steel
Valve seatStainless SteelStainless Steel
Special materials upon request

Selección de materiales para la válvula de vacío

Vacuum range [mbar]
[inch W.C.]
-7,0 up to -25
-2.8 up to -10
-10 up to-30
-4.0 up to -12
-30 up to-50
-12 up to -20
Valve palletAluminiumStainless SteelStainless Steel
Valve pallet hoodStainless SteelStainless SteelStainless Steel
SealingMetal to MetalMetal to MetalMetal to Metal
Special materials and other vacuum settings are available upon request

Tipo de bridas de conexión

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

Modelo y especificación

The valve pallet is weight-loaded.

Vacuum valve in basic design with heating jacket

SV/T - 0 - H

Additional special devices available upon request.


Vacuum: -7 mbar -50 mbar
-2.8 inch W.C. -20 inch W.C.
Higher and lower vacuum settings upon request.

Diagrama de flujo volumétrico

Los diagramas de flujo volumétrico han sido determinados con un banco de pruebas de caudal calibrado y certifi - cado por TÜV. El flujo volumétrico V. en [m³/h] y el CFH se refi eren a las condiciones estándar de referencia de aire según ISO 6358 (20°C, 1bar). La conversión a otras densidades y temperaturas están referidas en el Vol. 1: “Fundamentos Técnicos”.