P/ELR

P/ELR

Pressure Relief Valve

Function and Description

The P/ELR type PROTEGO® valve is a highly developed pressure relief valve with excellent flow performance. It is primarily used as a device for relieving pressure in tanks, containers, and process engineering equipment. 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, 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 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 substance. After the overpressure is released, the valve re-seats 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, resulting in a stable operation of the valve pallet, optimized performance, and reduced product losses.

Features and Advantages

  • 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 explosion hazardous areas
  • automatic condensate drain

Dimensions

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≤ +80 mbar> +80 mbar≤ +80 mbar> +80 mbar
Set pressure≤ +32.1 inch W.C.> +32.1 inch W.C.≤ +32.1 inch W.C.> +32.1 inch W.C.
a353 / 13.90353 / 13.90353 / 13.90353 / 13.90
b345 / 13.58505 / 19.88345 / 13.58505 / 19.88
DN 80 / 3" 80 / 3" 100 / 4" 100 / 4"
Set pressure≤ +80 mbar> +80 mbar≤ +80 mbar> +80 mbar
Set pressure≤ +32.1 inch W.C.> +32.1 inch W.C.≤ +32.1 inch W.C.> +32.1 inch W.C.
a353 / 13.90353 / 13.90353 / 13.90353 / 13.90
b345 / 13.58505 / 19.88345 / 13.58505 / 19.88

Dimensions in mm / inchesDimensions for pressure valves with heating jacket upon request

P/ELR
Detail X
Detail X

Material selection for housing

DesignBC
HousingSteelStainless Steel
Heating jacket (P / ELR-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Protective mesh screenStainless SteelStainless Steel
DesignBC
HousingSteelStainless Steel
Heating jacket (P / 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.]
+3,5 up to +5,0
+1.4 up to +2.0
>+5,0 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.]
+3,5 up to +5,0
+1.4 up to +2.0
>+5,0 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 materials(Aluminium-coated, Titanium, Hastelloy) and higher pressure Settings upon request

P/ELR
Detail X
Detail X

Flange connection type

EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.
EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.

other types upon request

Design Types and Specifications

The valve pallet is weight-loaded. At set pressures greater than 80 mbar (32.1 inch W.C.), an elongated construction is used.
There are two different designs:

Pressure valve in basic design

P/ELR - –

Pressure valve with heating jacket

P/ELR - H

Pressure valve in basic design

P/ELR - –

Pressure valve with heating jacket

P/ELR - H

Additional special devices available upon request.

Settings

Pressure:

+3.5 mbar +210 mbar
+1.4 inch W.C. +84 inch W.C.
Higher pressure settings upon request.
P/ELR
Detail X
Detail X

Flow Capacity Chart

The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”.

P/ELR
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Detail X
P/ELR
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Detail X