PV/ELR

Pressure and Vacuum Relief Valve

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Features

10% Technology

for minimum pressure increase up to full

Extreme Tightness

resulting in lowest possible losses and reduced environmental pollution

Optimal Pressure Maintenance

close to opening pressure for optimum pressure in the system

Flow Capacity

optimized flow capacity

Guided Valve Pallet

is guided inside the to protect against harsh weather conditions

Used in Explosion Hazardous Areas

can be used in hazardous areas

Condensate Drainage

automatic condensate drain

Eccentric Design

eases installation close to floors and walls

Function and Description

Combined Pressure and Vacuum Relief Valve

The PV/ELR type PROTEGO® valve is a highly developed combined with excellent flow performance. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, and process to protect against unallowable and underpressure. The valve prevents emission losses almost up to the set pressure and air intake almost up to the .

Full Lift Technology

The 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. This “full lift type” technology allows the valve to be set at just 10% below the maximum allowable working pressure or (MAWP or MAWV) of the tank and still safely vent the required mass flow. The opening characteristic is the same for pressure and vacuum relief.

Advanced manufacturing technology

Due to the highly developed manufacturing technology, the 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 (2) in conjunction with high quality FEP . 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 substances. After the overpressure is released or the vacuum is balanced, 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 stable operation of the valve pallet, optimized performance, and reduced product losses.

Product Data and Features

Dimensions

To select the nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (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.
a	345 / 13.58	475 / 18.70	345 / 13.58	475 / 18.70
b	146 / 5.75	146 / 5.75	146 / 5.75	146 / 5.75
c	218 / 8.58	218 / 8.58	218 / 8.58	218 / 8.58
d	353 / 13.90	353 / 13.90	353 / 13.90	353 / 13.90

Dimensions in mm / inches

Dimensions for pressure/ vacuum relief valve Vacuum relief valve A vacuum relief valve is used to ventilate a part of the system and protects it from impermissible underpressure. with heating jacket upon request

Material selection for housing

Design	B	C
Housing	Steel	Stainless Steel
Heating jacket (PV / ELR-H-...)	Steel	Stainless Steel
Valve seat Valve seat The valve seat is a component on which the valve pallet rests when the valve is closed.	Stainless Steel	Stainless Steel
Weather hood Weather hood A weather hood is a cover to protect the internal components of a device from environmental influences.	Steel	Stainless Steel
Protective mesh screen	Stainless Steel	Stainless Steel

Special materials upon request

Material selection for pressure valve pallet

Design	A	B	C	D
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 pallet	Aluminium	Stainless Steel	Stainless Steel	Stainless Steel
Sealing	FEP	FEP	Metal to Metal	PTFE

Special material as well as higher set pressure upon request

Material selection for vacuum valve pallet

Design	A	B	C	D
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 pallet	Aluminium	Stainless Steel	Stainless Steel	Stainless Steel
Sealing	FEP	FEP	Metal to Metal	PTFE

Special material as well as higher set vacuum upon request

Flange connection type

EN 1092-1; Form B1

ASME B16.5 CL 150 R.F.

other types upon request

Design Types and Specifications

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:

in basic designPV/ELR - –

Pressure/vacuum relief valve with heating jacketPV/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.

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”.