The PROTEGO® DZ/E is a robust and compact in-line valve that functions as a pressure or vacuum relief device with a right-angle design. Installed in piping systems of tanks and process vessels, it prevents damage from overpressure or vacuum while minimizing emissions and product ingress. Using PROTEGO®’s proprietary 10% full lift technology, the valve opens fully just 10% above the set pressure or vacuum point, ensuring quick, efficient relief and maximum safety. Its engineering precision delivers high tightness levels, reducing product loss and environmental impact.
25–300
±3.5 to ±60 mbar
10% full lift response
DN 25 to DN 300
DN 25–32: ±3.5 to ±60 mbar (±1.4 to ±24 inch W.C.) DN 40–300: ±2.0 to ±60 mbar (±0.8 to ±24 inch W.C.)
Full lift within 10% over/under pressure
Spring-loaded type DZ/E-F available for higher set pressures
High precision stainless steel seat with FEP or PTFE seal options
up to 1.6 bar
EN 1092-1, Form B1
ASME B16.5 CL 150 R.F.
PN 10
Suitable for hazardous area installation
Used across various industries for protection and tight venting of:
Atmospheric and low-pressure tanks
Process vessels and piping systems
Storage of volatile, sticky, or corrosive products
Chemical, petrochemical, biogas, and pharma sectors
Air and inert gases
Hydrocarbons
Sticky or aggressive process media
Corrosive gas mixtures
Dual functionality: pressure or vacuum relief
Ultra-tight sealing to minimize emissions
Stable flow and valve pallet operation
Optional heating jacket to prevent freezing or condensation
Full material flexibility including ECTFE coatings, Hastelloy, stainless steel
DZ/E-F Variant: Spring-loaded version for higher set pressures
Heating Jacket (DZ/E-H): Maintains temperature in cold climates
Valve Pallet Seal Options:
FEP
PTFE
Metal-to-metal
Material Options for Valve Pallet:
Aluminum, stainless steel, titanium, or Hastelloy
Coatings: ECTFE available on request
Explosion-proof compliant configuration
Special Pallet Designs: For proportional opening or partial load operations
From forging and casting to machining, assembly, and testing — every step is managed under one roof to ensure consistent quality, faster lead times, and zero compromise.
Get in touch with our team for additional information on product pricing, technical data, project support and more.
