ER/VH
Pressure Relief Valve
Features
10% Technology
for Minimum Pressure Increase up to Full Lift
Extreme Tightness
Resulting in Lowest Possible Product Losses and Reduced Environmental Pollution
Optimal Pressure Maintenance
Set Pressure Close to Opening Pressure for Optimum Pressure Maintenance in the System
Sturdy Housing Design
(PN 10 and PN 16)
Secured Housing Cover
With Lever and Lockable Weight Load
API Tanks
Best Technology for API Tanks
Used in Explosion Hazardous Areas
can Be Used in Explosion Hazardous Areas
Flow Capacity
Optimized Flow Capacity
Function and Description
Highly Developed Pressure Relief Valve
The ER/VH Type PROTEGO® valve is a highly developed emergency pressure relief valve 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 and prevents excessive product vapor loss close to the set pressure. It is designed to release particularly large amounts to prevent the vessel from rupturing in an emergency case. Higher set pressures are achieved by a lever with a lockable weight load. The position of the weight is set at the factory. Starting at DN 500, the devices can also be used as manhole covers.
Patented Valve Pallet Technology
When the set pressure is reached, the valve starts to open and is fully open within 10% overpressure. This unique 10% ”Full Lift Type" technology enables a pressure setting that is only 10% below the maximum allowable working pressure or design pressure of the tank.
Even in the low pressure range, the vent has the opening characteristic comparable to a typical high pressure safety relief valve. The full lift type pallets are a result of many years of development. The valve pallet is mounted on one side.
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 stainless steel with an inserted O-ring seal, a precisely lapped valve pallet, and a sturdy housing design. After the excess pressure is released, the valve re-seats and provides a tight seal again.
Product Data
Dimensions
To select the nominal size (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 | 350 / 13.78 | 365 / 14.37 | 385 / 15.16 | 390 / 15.35 | 390 / 15.35 | 415 / 16.34 | 430 / 16.93 | 450 / 17.72 | 465 / 18.31 |
| c | 200 / 7.87 | 240 / 9.45 | 265 / 10.43 | 285 / 11.22 | 310 / 12.20 | 330 / 12.99 | 360 / 14.17 | 410 / 16.14 | 450 / 17.72 |
| d | 590 / 23.23 | 735 / 28.94 | 780 / 30.71 | 845 / 33.27 | 890 / 35.04 | 1070 / 42.13 | 1090 / 42.91 | 1140 / 44.88 | 1380 / 54.33 |
Dimensions in mm / inches
Material selection
| Design | A | B |
| Housing | Steel | Stainless Steel |
| Valve seat | Stainless Steel | Stainless Steel |
| Valve pallet | Stainless Steel or Steel-Stainless Steel | Stainless Steel |
| Sealing | FPM | FPM |
| Weight | Steel | Stainless Steel |
Special materials upon request
Flange connection type
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other types 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”.
