Features
Function and Description
Highly Developed Vacuum Relief Valve
The V/SV-XL Type PROTEGO® valve is a highly developed optimized vacuum relief valve Vacuum relief valve 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 Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. for relieving vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. in tanks, containers and process engineering equipment Equipment Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion. . The valve offers reliable protection against vacuum, and prevents inbreathing of air close to the set pressure Set pressure Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. . The device will start to open as soon as the set pressure is reached and only requires 10% overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. to full lift Lift 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 Pressure (gauge pressure) Pressure for which the value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure. valve which has the same opening characteristic as a high pressure safety relief valve.
10% Technology
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. Due to our highly developed manufacturing technology the tank pressure Tank pressure 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 Seal 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 Diaphragm 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 Efficiency
The optimized fluid dynamic design of the valve body and valve pallet Valve pallet 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 Product Includes equipment, protective systems, devices, components and combinations of these. losses.
Dimensions
| DN | 300 / 12" |
| a | 946 / 37.24 |
| b | 649 / 25.55 |
Dimensions in mm / inches
Dimensions of pressure and vacuum relief valves with heating jacket upon request
Material selection for housing
| Design | A | B | C |
| Housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. | Aluminium | Steel | Stainless Steel |
| Heating jacket (V/SV-XL-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 | Stainless Steel |
| Sealing | PTFE | PTFE | PTFE |
| Cover | Aluminium | Steel | Stainless Steel |
Option: Housing ECTFE-coated
Special materials upon request
Material selection for vacuum valve pallet
| Design | A | B | C |
| Pressure range [mbar] [inch W.C.] | -2.0 up to -3.0 -0.8 up to -1.2 | <-3.0 up to -9.0 <-1.2 up to -3.6 | <-9.0 up to -16 <-3.6 up to -6.4 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel |
| Sealing | FEP | FEP | Metal to Metal |
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
The valve pallets are weight-loaded. Higher vacuum can be achieved upon request with a special spring Spring A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. -loaded design. There are two different designs:Additional special devices available upon request.
Settings
| Vacuum: | -2.0 mbar | -16 mbar |
| -0.8 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”.
