DV/ZW

Name: DV/ZW
Brand: PROTEGO
SKU: product32881058541611

Pressure and Vacuum Relief Valve, In-Line

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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)

Function and Description

Pressure and Vacuum Relief Valve with Flange Connection for a Vent Line

The PROTEGO® In-Line Valve DV/ZW is a state-of-the-art with separate flange connections for use in a vent line. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, and process equipment to protect against unallowable and underpressure. The valve prevents emission losses almost up to the and prevents air intake almost up to . It is designed in a way that if the set pressure is exceeded, the vapors are released into an exhaust pipe (e.g., Vent Header). If the set vacuum is exceeded, atmospheric air is pulled into the system. For structural reasons, the is one size smaller than the pressure valve pallet.

Full Lift Technology

The will start to open as soon as the set pressure is reached and only requires 10% overpressure to full . 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. The opening characteristic of the pressure and vacuum side is basically the same. However, the in-breathing will start as soon as the differential pressure between the atmospheric pressure and the tank is greater than the set pressure of the vacuum valve pallet. Due to our highly developed manufacturing technology, the is maintained up to set pressure with a tightness that is far above the conventional standard.

Optimized Valve Design for Maximum Performance

This feature is ensured by valve seats made of high quality stainless steel and with individually 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 pallets from sticking when sticky products are used and to enable the use of corrosive fluids. After the over pressure 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

Dimensiones

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

DN	40 / 1½“	50 / 2"	80 / 3"	100 / 4"	150 / 6"
a	280 / 11.02	280 / 11.02	340 / 13.39	390 / 15.35	520 / 20.47
b	230 / 9.06	230 / 9.06	240 / 9.45	290 / 11.42	330 / 12.99
c	85 / 3.35	85 / 3.35	125 / 4.92	140 / 5.51	185 / 7.28
d	210 / 8.27	210 / 8.27	280 / 11.02	310 / 12.20	390 / 15.35

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	A	B
Housing	Steel	Stainless Steel
Heating jacket (DV / ZW-H-...)	Steel	Stainless Steel
Valve seat	Stainless Steel	Stainless Steel
Gasket	PTFE	PTFE

Option: Housing with ECTFE-lining

Special materials upon request

Selección de materiales para la válvula de presión

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 +60 >+5.6 up to +24	>+14 up to +60 >+5.6 up to +24
Valve pallet	Aluminium	Stainless Steel	Stainless Steel	Stainless Steel
Sealing	FEP	FEP	Metal to Metal	PTFE

Special materials upon request

For higher set pressures refer to type DV/ZW-F.

Selección de materiales para la válvula de vacío

Design	A	B	C	D	E	F
Pressure range [mbar] [inch W.C.]	-3.5up to -5.0 -1.4up to -2.0	<-5.0 up to -14 <-2.0up to -5.6	<-14up to -35 <-5.6 up to -14	<-35 up to -50 <-14 up to -20	<-14 up to -35 <-5.6 up to -14	<-35 up to -50 <-14 up to -20
Valve pallet	Aluminium	Stainless Steel	Stainless Steel	Stainless Steel	Stainless Steel	Stainless Steel
Sealing	FEP	FEP	Metal to Metal	Metal to Metal	PTFE	PTFE

Special materials and lower set vacuum upon 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”.