Features
Function and Description
High-Performance Pressure Relief Valve
The D/SVL Type PROTEGO® valve is a high performance pressure relief valve. It is primarily used as a device for relieving pressure in tanks, containers, and process engineering equipment. The valve offers reliable protection against overpressure and prevents excessive loss of product vapors close to the set pressure.
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. With this “Full Lift Type” technology, the valve can be set at 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 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 high quality stainless steel and with precisely lapped valve pallets (1), or with an air cushion seal (2) in conjunction with high quality FEP diaphragm. The valve pallets are also available with a PTFE seal to prevent the valve pallet from sticking when sticky products are used, and they enable the use of corrosive substances. After the overpressure is released, the valve re-seats and provides a tight seal again. The optimized fluid dynamic design of the valve body and valve pallet is a result of many years of research, resulting in stable operation of the valve pallet, optimized performance, and reduced product losses.
Dimensions
To select the nominal size (DN), use the flow capacity chart on the following page
| DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12 |
| a | 336 / 13.23 | 412 / 16.22 | 444 / 17.48 | 564 / 22.20 | 664 / 26.20 | 687 / 27.05 | 687 / 27.05 |
| b | 200 / 7.87 | 295 / 11.61 | 295 / 11.61 | 465 / 18.31 | 550 / 21.65 | 650 / 25.59 | 650 / 25.59 |
Dimensions in mm / inches
Material selection for housing
| Design | A | B |
| Housing | Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel |
| Sealing | PTFE | PTFE |
| Weather hood | Stainless Steel | Stainless Steel |
Special materials upon request
Material selection for pressure 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 | >+35 up to +60 >+14 up to +24 | >+14 up to +35 >+5.6 up to +14 | >+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 | Metal to Metal | PTFE | PTFE |
Special materials and devices with higher set pressure or vacuum are available 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 can be achieved upon request with a special spring-loaded design.Additional special devices available upon request.
Settings
| Pressure: | +2.0 mbar | +60 mbar |
| +2.0 inch W.C. | +24 inch W.C. |
Higher pressure 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”.
