Features
Function and Description
Highly Developed Vacuum Relief Valve
The V/SV Type PROTEGO® valve is a highly developed vacuum relief valve Válvula de vácuo A vacuum relief valve is used to ventilate a part of the system and protects it from impermissible underpressure. with excellent flow performance. It is primarily used as a device for relieving vacuum Vácuo Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. in tanks, containers and process engineering equipment. The valve offers reliable protection against vacuum, and prevents inbreathing of air 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. .
10% Technology
The device will start to open as soon as the set pressure is reached and only requires 10% overpressure Sobrepressão Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. 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.
Valve Seats Made of High Quality Stainless Steel
Due to our highly developed manufacturing technology the tank pressure Pressão de tanque Tank pressure is the pressure within a tank. is maintained up to set pressure, with a tightness that is far superior to the conventional standard. This feature is achieved by valve seats made of high quality stainless steel and with precisely lapped valve pallets (1) or with an air cushion 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. (2) in conjunction with high quality FEP diaphragm Membrana A diaphragm is a thin layer of material, which has a large surface area. . The valve pallets are also available with a PTFE seal to prevent the valve pallets from sticking when sticky products are used, and they enable the use of corrosive media. After the vacuum is relieved, the valve reseats and provides a tight seal again.
Flow-Optimized Valve Body for Maximum Performance
The optimized fluid dynamic design of the valve body and valve pallet Placa da válvula Valve pallet is the generic term for the assembly that rests on the valve seat. is a result of many years of research work, which allow a stable operation of the valve pallet and optimized performance resulting in reduction of product losses.
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 | 40 / 1½" | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" |
| a | 249* / 9.8* | 249 | 312 | 358 | 443 | 520 | 588 | 588 |
| b | 325* / 12.79* | 337 | 400 | 514 | 713 | 808 | 925 | 925 |
Dimensions in mm / inches
Dimensions for vacuum relief valve with heating jacket upon request
Material selection for housing
| Design | A | B | C |
| Housing | Aluminium | Steel | Stainless Steel |
| Heating jacket (V / SV-H-...) | – | Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | PTFE | PTFE | PTFE |
| Cover | Aluminium | Steel | Stainless Steel |
Option: Housing with ECTFE- lining Revestimento Protective plastic lining with a defined minimum/maximum thickness to protect against aggressive mixtures (e.g., acid).
Special materials upon request
Material selection for vacuum valve pallet
| Design | A | B | C | D | E | F |
| 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 -35 <-5.6 up to -14 | <-14 up to -35 <-5.6up to -14 | <-35 up to -60 <-14 up to -24 | <-35 up to -60 <-14 up to -24 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal | PTFE | Metal to Metal | PTFE |
Special material as well as higher vacuum 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
There are two different designs:Additional special devices available upon request
Settings
| Vacuum: | -2.0 mbar | -60 mbar |
| -0.8 inch W.C. | -24 inch W.C. |
Higher vacuum settings upon request.
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”.
