VD/SV-PA(L)

VD/SV-PA(L)

Pressure and Vacuum Relief Valve

with pipe-away connection

Función y Descripción

The VD/SV-PA(L) type PROTEGO® valve is a highly developed pressure and vacuum relief valve with excellent flow performance. Typically the valve is installed in the in- and outbreathing lines of tanks, vessels and process apparatus to protect against unallowable high and low pressure. The valve prevents emission losses almost up to the set pressure and prevents air intake almost up to set vacuum. The product vapors can be discharged through a collective line connected to the line flange on the pressure side.

The device will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift. Continuous investments into 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. This “full lift type” technology allows the valve to be set just 10% below the maximum allowable working pressure or vacuum (MAWP or MAWV) of the tank and still safely vent the required mass flow. The opening characteristic is the same for presssure and vacuum relief.

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 quality stainless steel and with precisely lapped valve pallets (1) or with an air cushion seal (2) in conjunction with high quality FEP diaphragm. The valve pallets are also available with a PTFE seal to prevent the valve pallets from sticking when sticky products are used and to enable the use of corrosive fluids. After the excess pressure is discharged or the vacuum is compensated, the valve reseats and provides a tight seal.

The optimized fluid dynamic design of the valve body and valve pallet is a result of many years of research work, which allow a stable operation of the valve pallet and optimized performance resulting in reduction of product losses.

Características especiales y ventajas

  • “full lift type” technology valve utilizes only 10% overpressure to reach full lift
  • extreme tightness and hence least possible product losses and reduced environmental pollution
  • set pressure is close to the opening pressure which results in best possible pressure management of the system
  • very high flow capacity
  • can be used in areas subject to explosion hazards
  • self draining
  • maintenance friendly design
  • best technology for API-tanks

Dimensiones

To select the nominal size (DN), use the flow capacity charts on the following pages

VD / SV-PA
DN 150 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
DN 250 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
a405 / 15.95480 / 18.90600 / 23.62805 / 31.69925 / 36.42
b390 / 15.35485 / 19.09550 / 21.65660 / 25.98780 / 30.71
c150 / 5.91180 / 7.09200 / 7.87250 / 9.84300 / 11.81
d240 / 9.45300 / 11.81330 / 12.99390 / 15.35480 / 18.90
e165 / 6.50192 / 7.56240 / 9.45350 / 13.78390 / 15.35
VD / SV-PAL
DN 150 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
DN 280 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"350 / 14"
a395 / 15.55445 / 17.52565 / 22.24770 / 30.31895 / 35.24
b400 / 15.74485 / 19.09550 / 21.65655 / 25.79775 / 30.51
c140 / 5.51143 / 5.63165 / 6.50216 / 8.50267 / 10.51
d255 / 10.04308 / 12.13355 / 13.98417 / 16.42505 / 19.88
e165 / 6.50192 / 7.56240 / 9.45350 / 13.78390 / 15.35
VD / SV-PA
DN 150 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
DN 250 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
a405 / 15.95480 / 18.90600 / 23.62805 / 31.69925 / 36.42
b390 / 15.35485 / 19.09550 / 21.65660 / 25.98780 / 30.71
c150 / 5.91180 / 7.09200 / 7.87250 / 9.84300 / 11.81
d240 / 9.45300 / 11.81330 / 12.99390 / 15.35480 / 18.90
e165 / 6.50192 / 7.56240 / 9.45350 / 13.78390 / 15.35
VD / SV-PAL
DN 150 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
DN 280 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"350 / 14"
a395 / 15.55445 / 17.52565 / 22.24770 / 30.31895 / 35.24
b400 / 15.74485 / 19.09550 / 21.65655 / 25.79775 / 30.51
c140 / 5.51143 / 5.63165 / 6.50216 / 8.50267 / 10.51
d255 / 10.04308 / 12.13355 / 13.98417 / 16.42505 / 19.88
e165 / 6.50192 / 7.56240 / 9.45350 / 13.78390 / 15.35

Dimensiones en mm / pulgadas

Dimensions of pressure and vacuum relief valves with heating jacket upon request

VD/SV-PA(L)

Detail X

Detail X

Selección de materiales para la vivienda

Design ABC
HousingAluminiumSteelStainless Steel
Heating jacket (VD / SV-PA(L)-H-...)SteelStainless Steel
Valve seatStainless SteelStainless SteelStainless Steel
SealingPTFEPTFEPTFE
Design ABC
HousingAluminiumSteelStainless Steel
Heating jacket (VD / SV-PA(L)-H-...)SteelStainless Steel
Valve seatStainless SteelStainless SteelStainless Steel
SealingPTFEPTFEPTFE

Option: Housing with ECTFE-lining

Special materials upon request

Selección de materiales para la válvula de presión

Design ABCDEF
Pressure range [mbar]
[inch W.C.]
+2,0 up to +3,5
+0.8 up to +1.4
>+3,5 up to +14
>+1.4 up to +5.6
>+14 up to +35
>+5.6 up to +14
>+35 up to +60
>+14 up to +24
>+14 up to +35
>+5.6 up to +14
>+35 up to +60
>+14 up to +24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to MetalPTFEPTFE
Design ABCDEF
Pressure range [mbar]
[inch W.C.]
+2,0 up to +3,5
+0.8 up to +1.4
>+3,5 up to +14
>+1.4 up to +5.6
>+14 up to +35
>+5.6 up to +14
>+35 up to +60
>+14 up to +24
>+14 up to +35
>+5.6 up to +14
>+35 up to +60
>+14 up to +24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to MetalPTFEPTFE

Special materials as well as higher set pressure upon request

Selección de materiales para la válvula de vacío

Design ABCDEF
Pressure range [mbar]
[inch W.C.]
-2,0 up to -3,5
-0.8 up to -1.4
<-3,5 up to -14
<-1.4 up to -5.6
<-14 up to -35
<-5.6 up to -14
<-14 up to -35
<-5.6up to -14
<-35 up to -60
<-14 up to -24
<-35 up to -60
<-14 up to -24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to MetalPTFEPTFE
Design ABCDEF
Pressure range [mbar]
[inch W.C.]
-2,0 up to -3,5
-0.8 up to -1.4
<-3,5 up to -14
<-1.4 up to -5.6
<-14 up to -35
<-5.6 up to -14
<-14 up to -35
<-5.6up to -14
<-35 up to -60
<-14 up to -24
<-35 up to -60
<-14 up to -24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to MetalPTFEPTFE

Special material as well as higher set vacuum upon request

VD/SV-PA(L)

Detail X

Detail X

Tipo de bridas de conexión

EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF
EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF

other types upon request

Modelo y especificación

The valve pallets are weight-loaded. Higher pressures can be achieved upon request with a special spring-loaded design. Choose the model (L) if the discharge nozzle has a nominal diameter that is greater than the nominal diameter of the tank filler neck.
There are four different designs:

Pressure/vacuum valve in basic design

VD/SV-PA - -

Pressure/vacuum valve with heating jacket

VD/SV-PA - H

Pressure/vacuum relief valve with DN2 > DN1

VD/SV-PAL - -

Pressure/vacuum relief valve with DN2 > DN1 with heating jacket

VD/SV-PAL - H

Pressure/vacuum valve in basic design

VD/SV-PA - -

Pressure/vacuum valve with heating jacket

VD/SV-PA - H

Pressure/vacuum relief valve with DN2 > DN1

VD/SV-PAL - -

Pressure/vacuum relief valve with DN2 > DN1 with heating jacket

VD/SV-PAL - H

Additional special devices available upon request.
Any combination of vacuum and pressure levels can be set for the valve. When the difference between the pressure and vacuum exceeds 150 mbar / 60.2 inch W.C., special valve pallets are used.

Settings

Pressure:

+2.0 mbar

+60 mbar

+0.8 inch W.C.

+24 inch W.C.

Vacuum:

-2.0 mbar

-60 mbar

-0.8 inch W.C.

-24 inch W.C.

Higher or lower settings upon request.

VD/SV-PA(L)

Detail X

Detail X

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”.

VD/SV-PA(L)

Detail X

Detail X

VD/SV-PA(L)

Detail X

Detail X