SV/T-0-H
Vacuum Relief Valve in a special heat jacketed design
- excellent tightness resulting in lowest possible product losses and reduced environmental pollution
- high flow capacity
- valve pallet is guided inside the housing to protect against harsh weather conditions
- can be used in explosion hazardous areas
- complete heating jacket up to the flange to avoid ice build-up
- maximum allowable heating medium temperature of 320°C / 608°F (at 6 bar/87 psi)
- a special design that preheats incoming air is also available
- available in a special design with a heatable valve cover
- a valve pallet cover prevents the adjustment of the set pressure due to dust deposits or condensate
- sturdy housing design
- available in a special design with lifting device
Function and Description
The SV/T-0-H type PROTEGO® valve is a highly developed vacuum relief valve with a valve housing that is equipped with a heating jacket that can be heated up to the flange. It is primarily used as a device for in-breathing in tanks, containers, and process engineering equipment under difficult operating conditions. This includes extreme weather conditions or products that tend to form polymers at certain temperatures, stick together, or form deposits that negatively influence function (such as bitumen, tar, dust). The valve offers reliable protection against vacuum and prevents air intake almost up to the set vacuum.
When the set vacuum is reached, the valve starts to open and reaches full lift within a 40% vacuum increase. Up to the set vacuum, the tank vacuum is maintained with a seal that is far superior to the conventional standard due to the highly developed manufacturing technology. This feature is achieved by valve seats made of high quality stainless steel with precisely lapped valve pallets and a sturdy housing design. After the vacuum is released, the valve re-seats and again provides a tight seal.
Dimensions
To select the nominal size (DN), use the flow capacity chart on the following page
| DN1 | 80* / 3"* | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" |
| DN2 | 15 / ½" | 15 / ½" | 15 / ½" | 15 / ½" | 15 / ½" |
| a | 570 / 22.44 | 570 / 22.44 | 720 / 28.35 | 920 / 36.22 | 1050 / 41.34 |
| b | 275 / 10.83 | 275 / 10.83 | 355 / 13.98 | 405 / 15.94 | 508 / 20.00 |
| c | 70 / 2.76 | 70 / 2.76 | 60 / 2.36 | 70 / 2.76 | 70 / 2.76 |
| d | 440 / 17.32 | 440 / 17.32 | 590 / 23.23 | 790 / 31.10 | 920 / 36.22 |
| e | 450 / 17.72 | 450 / 17.72 | 650 / 25.59 | 750 / 29.53 | 950 / 37.40 |
| f | 225 / 8.86 | 225 / 8.86 | 260 / 10.24 | 300 / 11.91 | 350 / 13.78 |
Material selection for housing
| Design | A | B |
| Housing | Steel | Stainless Steel |
| Heating jacket | Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel |
| Sealing | PTFE | PTFE |
Material selection for vacuum valve pallet
| Design | A | B | C |
| Vacuum range [mbar] [inch W.C.] | -7,0 up to -25 -2.8 up to -10 | -10 up to-30 -4.0 up to -12 | -30 up to-50 -12 up to -20 |
| Valve pallet | Aluminium | Stainless Steel | Stainless Steel |
| Valve pallet hood | Stainless Steel | Stainless Steel | Stainless Steel |
| Sealing | Metal to Metal | Metal to Metal | Metal to Metal |
Flange connection type
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
Design Types and Specifications
The valve pallet is weight-loaded.
Vacuum valve in basic design with heating jacket | SV/T - 0 - H |
Additional special devices available upon request.
Settings
| Vacuum: | -7 mbar | -50 mbar | |
| -2.8 inch W.C. | -20 inch W.C. |
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”.
