Features
Function and Description
Highly Developed Pressure Relief Valve
The ER/V Type PROTEGO® valve is a highly developed emergency pressure relief valve Válvula de alívio de pressão Valve designed to open and relieve excess pressure and to reclose and prevent the further flow of fluid after normal conditions have been restored. with high flow capacity. It is primarily used as a device for emergency pressure relief for storage tanks, containers, silos, and process engineering equipment; it offers reliable protection against overpressure Sobrepressão Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and prevents impermissible product vapor loss close to the set pressure Pressão de descarga Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. . It is designed to relief particularly large amounts to prevent the vessel Recipiente Container or structural envelope in which materials are processed, treated or stored. from rupturing in an emergency case.
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 Curso Lift is the actual travel of the valve pallet from the main valve out of the closed position. . Continuous investments into 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 just 10% below the maximum allowable working pressure of the tank and still safely vent the required mass flow.
Advanced Manufacturing Technology
Due to the highly developed manufacturing technology, the tank pressure Pressão de tanque Tank pressure is the pressure within a tank. 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 stainless steel with an inserted O-ring Anel de vedação O-ring O-rings are ring-shaped gaskets with a round, o-shaped cross section seal Vedação A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements. , a precisely lapped valve pallet Placa da válvula Valve pallet is the generic term for the assembly that rests on the valve seat. , as well as a reinforced housing Corpo A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. design. After the excess pressure is relieved, the valve reseats and provides a tight seal again.
Dimensions
To select the nominal size Dimensão 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), use the flow capacity chart on the following page
| DN | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" | 400 / 16" | 450 / 18" | 500 / 20" | 600 / 24" | 700 / 28" |
| a | 305 / 12.01 | 375 / 14.76 | 425 / 16.73 | 445 / 17.52 | 495 / 19.49 | 545 / 21.46 | 615 / 24.21 | 715 / 28.15 | 795 / 31.30 |
| b | depending on pressure setting |
Dimensions in mm / inches
Material selection
| Design | A | B | C | D |
| Housing | Steel | Steel | Stainless Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Valve pallet | Aluminium* | Steel-Stainless Steel* | Aluminium* | Stainless Steel* |
| Sealing | FPM | FPM | FPM | FPM |
* depending on pressure setting
Special materials 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 pallet is weight-loaded. Higher pressures are achieved with levers (see ER/VH) or with spring Mola A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. -loading (see ER/V-F).Additional special devices available upon request.
Settings
| DN 200 to DN 350 | +5 mbar | +40 mbar |
| +2 inch W.C.J | +16 inch W.C. | |
| DN 400 to DN 700 | +5 mbar | +25 mbar |
| +2 inch W.C.J | +10 inch W.C. |
For higher pressure settings, see types ER/VH and ER/V-F.
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”.
