PV/ELR

PV/ELR

Pressure and Vacuum Relief Valve

Функция и описание

The PV/ELR type PROTEGO® valve is a highly developed combined 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 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 the highly developed manufacturing technology, the tank pressure is maintained up to the 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 pallet from sticking when sticky products are used, and they enable the use of corrosive media. 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.

Особые признаки и преимущества

  • “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
  • the set pressure is close to the opening pressure which results in best possible pressure management of the system
  • high flow capacity
  • the valve pallet is guided within the housing to protect against freezing in cold weather
  • can be installed in explosion hazardous areas
  • self-actuated condensate drain
  • compact design saves space
  • special design with lifting gear can be purchased
  • maintenance friendly design

Таблица параметров

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

DN 80 / 3"80 / 3" 100 / 4" 100 / 4"
Set pressure≤ +35 mbar> +35 mbar≤ +35 mbar> +35 mbar
Set pressure≤ +14 inch W.C.> +14 inch W.C.≤ +14 inch W.C.> +14 inch W.C.
a345 / 13.58475 / 18.70345 / 13.58475 / 18.70
b146 / 5.75146 / 5.75146 / 5.75146 / 5.75
c218 / 8.58218 / 8.58218 / 8.58218 / 8.58
d353 / 13.90353 / 13.90353 / 13.90353 / 13.90
DN 80 / 3"80 / 3" 100 / 4" 100 / 4"
Set pressure≤ +35 mbar> +35 mbar≤ +35 mbar> +35 mbar
Set pressure≤ +14 inch W.C.> +14 inch W.C.≤ +14 inch W.C.> +14 inch W.C.
a345 / 13.58475 / 18.70345 / 13.58475 / 18.70
b146 / 5.75146 / 5.75146 / 5.75146 / 5.75
c218 / 8.58218 / 8.58218 / 8.58218 / 8.58
d353 / 13.90353 / 13.90353 / 13.90353 / 13.90

размер в мм

Dimensions for pressure/ vacuum relief valve with heating jacket upon request

PV/ELR

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Выбор материала корпуса

Design BC
HousingSteelStainless Steel
Heating jacket (PV / ELR-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Protective mesh screenStainless SteelStainless Steel
Design BC
HousingSteelStainless Steel
Heating jacket (PV / ELR-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Protective mesh screenStainless SteelStainless Steel

Special materials upon request

Material selection for pressure valve pallet

Design ABCD
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 +210
>+5.6 up to +84
>+14 up to +210
>+5.6 up to +84
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE
Design ABCD
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 +210
>+5.6 up to +84
>+14 up to +210
>+5.6 up to +84
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE

Special material as well as higher set pressure upon request

Material selection for vacuum valve pallet

Design ABCD
Pressure range [mbar]
[inch W.C.]
-3.5 up to -5.0
-1.4 up to -2.0
<5.0 up to -14
<-2.0 up to -5.6
<-14 up to -35
<-5.6 up to -14
<-14 up to -35
<-5.6 up to -14
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE
Design ABCD
Pressure range [mbar]
[inch W.C.]
-3.5 up to -5.0
-1.4 up to -2.0
<5.0 up to -14
<-2.0 up to -5.6
<-14 up to -35
<-5.6 up to -14
<-14 up to -35
<-5.6 up to -14
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE

Special material as well as higher set vacuum upon request

PV/ELR

Detail X

Detail X

Вид фланцевого соединения

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

Модели и спецификация

The valve pallets are weight-loaded. At set pressures greate than 35 mbar ( 14 inch W.C.), an elongated construction is used.
There are two different designs:

Pressure/vacuum relief valve in basic design

PV/ELR - –

Pressure/vacuum relief valve with heating jacket

PV/ELR - H

Pressure/vacuum relief valve in basic design

PV/ELR - –

Pressure/vacuum relief valve with heating jacket

PV/ELR - 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

+210 mbar

+0.8 inch W.C.

+84 inch W.C.

Vacuum:

-14 mbar

-50 mbar

-5.6 inch W.C.

-20 inch W.C.

Vacuum:

-3.5 mbar

-14 mbar

-1.4 inch W.C.

-5.6 inch W.C.

for presssure up to max. + 150 mbar / 60.2 inch W.C.
Higher and lower settings upon request.

PV/ELR

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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

PV/ELR

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PV/ELR

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