Protego BR
PROTEGO®
Excellence in Safety and Environment

DV/ZT-F

Pressure and Vacuum Relief Valve, In-Line 

Features

Tecnología del 10%
para un aumento mínimo de presión hasta alcanzar la apertura completa
Extrema estanqueidad
Lo que se traduce en las menores pérdidas posibles de producto y en una reducción de la contaminación ambiental
Mantenimiento óptimo de la presión
Basado en la tecnología del 10 %, la presión de tarado está muy próxima a la presión de apertura para un mantenimiento óptimo de la presión en el sistema, en comparación con la tecnología convencional del 40 % o del 100 %
Alta capacidad volumétrica
Reduce costes mediante el uso de válvulas más pequeñas
Se usa en zonas con riesgo de explosión
Puede utilizarse en zonas con riesgo de explosión
Diseño de cuerpo robusto
(PN 10 & PN 16)
Precarga por resorte (lado de sobrepresión)
para presiones de tarado altas
Function and Description

Pressure or Backflow Protection in Venting or Exhaust Lines

The PROTEGO® In-Line Valve DV/ZT-F is a state-of-the-art Pressure and Vacuum Relief Valve. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, and process equipment to protect against unallowable overpressure and underpressure. The valve prevents emission losses almost up to the set pressure and prevents unacceptable product entry system. For structural reasons, the vacuum valve pallet is one size smaller than the pressure valve pallet. Due to the springloaded design, higher set pressures can be achieved.

Full Lift Technology

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. This “Full Lift Type” technology allows the valve to be set at just 10% below the maximum allowable working pressure or vacuum (MAWP or MAWV) 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 above to the conventional standard.

Optimal Performance

This feature is ensured by valve seats made of high quality stainless steel and with individually lapped valve pallets (1) (3), or with an air cushion seal (2), in conjunction with high quality FEP diaphragm and a sturdy housing design. After the overpressure is released of 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

Dimensiones

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

DN40 / 1½“ 50 / 2"80 / 3" 100 / 4" 150 / 6" 200 / 8" 250 / 10"
a280 / 11.02280 / 11.02340 / 13.39390 / 15.35520 / 20.47650 / 25.59750 / 29.53
b210 / 8.27210 / 8.27280 / 11.02310 / 12.20390 / 15.35565 / 22.24610 / 24.02
c605 / 23.82605 / 23.82730 / 28.74870 / 34.251170 / 46.061030 / 40.551335 / 52.56

Dimensiones en mm / pulgadas

Larger sizes upon request

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

Selección de materiales para la vivienda

Design AB
HousingSteelStainless Steel
Heating jacket (DV / ZT-F-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
GasketPTFEPTFE

Option: Housing with ECTFE-lining

Special materials upon request

Selección de materiales para la válvula de presión

Design A
Pressure range [mbar]
[inch W.C.]		>+60 up to +500
>+24 up to +200
Valve palletStainless Steel
SealingMetal to Metal
SpringStainless Steel

Special materials upon request

For lower set pressure use type DV/ZT. Higher set pressure and lower set vacuum upon request.

Selección de materiales para la válvula de vacío

Design A*B*CD
Pressure range [mbar]
[inch W.C.]
-3,5 up to -5,0
-1.4 up to -2.0
<-5,0 up to -14
<-2.0up to -5.6		<-14up to -35
<-5.6up to -14		<-35 up to -50
<-14up to -20
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to Metal

*by set pressure up to +150 mbar / +60 Inch W.C.

Special materials and lower set vacuumupon request.

Tipo de bridas de conexión

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

other types 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”.

Detail X

Detail X

Detail Y

Tank connection