DZ/E-F

Pressure or Vacuum Relief Valve, In-Line

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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

Optimum Pressure Maintenance

based on , is close to opening pressure for optimum pressure in the system as compared to conventional 40% or 100% technology

High Flow Capacity

reduces costs through the use of smaller valves

For Over- and Underpressure

can be used as

Eccentric Design

eases installation close to floors and walls

Used in Explosion Hazardous Areas

can be used in hazardous areas

Sturdy Housing Design

(PN 10 and PN 16)

Spring-Loaded

for high set pressures

Function and Description

Highly Developed Pressure or Vacuum Relief Valve

The PROTEGO® in-line valve DZ/E-F is a state-of-the-art pressure or vacuum relief valve in a right angle design for higher system pressures. Typically, the valve is installed in the in-breathing or out-breathing lines of tanks, vessels, and opening pressure which results in best possible process to protect against unallowable or underpressure. The valve prevents emission losses almost up to the set pressure and prevents unacceptable product entry. As this is equipped with a , higher set pressures are achieved than with the DZ/E.

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 (MAWP or MAWV) of the tank and still safely vent the required mass flow.

Advanced Manufacturing Technology

The opening characteristic is the same for pressure and vacuum relief. Due to our highly developed manufacturing technology, the is maintained up to set pressure with a tightness that is far above the conventional standard. This feature is ensured by valve seats made of high quality stainless steel and with individually lapped valve pallets (1) and a sturdy design. After the overpressure is released or the vacuum is balanced, the valve re-seats and provides a tight . The optimized fluid dynamic design of the valve body and 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), please use the flow capacity charts on the following pages

DN	25 / 1"	32 / 1¼“	40 / 1½“	50 / 2"	65 / 2½"	80 / 3"	100 / 4"	150 / 6"	200 / 8"	250 / 10"	300 / 12"
a	110 / 4.33	110 / 4.33	125 / 4.92	125 / 4.92	170 / 6.69	170 / 6.69	190 / 7.48	230 / 9.06	275 / 10.83	325 / 12.80	350* / 13.78
b	75 / 2.95	75 / 2.95	90 / 3.54	90 / 3.54	115 / 4.53	115 / 4.53	120 / 4.72	160 / 6.30	225 / 8.86	275 / 10.83	300 / 11.81
c	150 / 5.91	150 / 5.91	170 / 6.69	170 / 6.69	235 / 9.25	235 / 9.25	280 / 11.02	335 / 13.19	420 / 16.54	505 / 19.88	565 / 22.24
d	435 / 17.13	435 / 17.13	445 / 17.52	445 / 17.52	620 / 24.41	620 / 24.41	700 / 27.56	970 / 38.19	1205 / 47.44	1275 / 52.36	1330 / 52.36

Dimensions in mm / inches

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

* for ANSI 12" = 400 mm / 15.75 inches

Material selection for housing

Design	A	B
Housing	Steel	Stainless Steel
Heating jacket (DZ / E-F-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
Gasket	PTFE	PTFE
Valve pallet	A	A

Option: Housing with ECTFE- lining Lining Protective plastic lining with a defined minimum/maximum thickness to protect against aggressive mixtures (e.g., acid).

Special materials upon request

Material selection for valve pallet

Design	A
Pressure range [mbar] [inch W.C.]	±60 up to ±500 ±24 up to ±200
Valve pallet	Stainless Steel
Sealing	Metal to Metal
Spring	Stainless Steel

Special materials upon request.

Devices with higher set pressure or vacuum are available upon request, for lower set pressure or vacuum refer to type D/PA(L)

Flange connection type

EN 1092-1; Form B1

ASME B16.5 CL 150 R.F.

other connections upon request

Design Types and Specifications

The valve pallet is spring loaded. Lower set pressures for pressure and vacuum are achieved by using the weight loaded type DZ/E.
Two different right angle designs are available:

In-line pressure or vacuum relief valve, standard designDZ/E-F - –

In-line pressure or vacuum relief valve with heating jacketDZ/E-F - H

Additional special devices available upon request
Within piping systems the influence of backpressure has to be considered in deciding the set pressure and opening characteristics. For special design solutions (e.g. partial load operation) the valve can be supplied with standard valve pallets (with proportional opening function).

Settings

	±60 mbar	±500 mbar
	±24 inch W.C.	±200 innch W.C.
	±60 mbar	±400 mbar
	±24 inch W.C.	±160 inch W.C.
	±60 mbar	±300 mbar
	±24 inch W.C.	±120 inch W.C.

Devices with higher set pressure or vacuum are available upon request, for lower set pressures or vacuum refer to type DZ/E.

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”.