LESER Product Overview
Click on one of the
valves for details
valves for details
-
High Efficiency
Pilot-operated safety valves and supplementary loading systems for optimal tightness right up to set pressure.
Advantages
- Pilot Operated Safety Valve:
- Piping between the pilot and main valves is integrated into the cover to prevent damage and freezing
- Integrated Backflow Preventer as standard part
- Four week delivery time from the factory
- Higher capacity than comparable size with extra orifices
- 20% less installation space than competitors' comparable models
- Supplementary Loading System:
- Higher operating pressures are possible
- Closing pressure difference of up to -3 %; opening process is independent of back pressure
- Functional test and valve adjustment possible during operation
- Max. 0.1 sec. for valve to open completely
Technical Specifications
| Nominal Diameter at Inlet | DN 25 - DN 200 | 1" - 8" |
| Orifice | 1 D 2 to 8 T+ 10 | 1 D 2 to 8 T+ 10 |
| Actual Orifice Diameter d0 | 11 mm - 180 mm | 0.433 in - 7.087 in |
| Actual Orifice Area A0 | 95 mm² - 25,446.9 mm² | 0,147 in² - 39.443 in² |
| Pressure | 2,5 bar - 63 bar | 36 psig - 1,480 psig |
| Temperature (iaw DIN EN) | -45 °C to 200 °C | -49°F to 392°F |
| Body Material | 1.0619, 1.4408 | SA 352 LCB, SA 216 WCB, SA 351 CF8M |
| Valve Connection | Flange in accordance with DIN EN 1092, ASME B 16.5 or JIS 2220 |
| Load Type | Medium Controlled |
Approvals
Industries
- Oil and Gas Industry
- Chemical Industry
- Petrochemical Industry
- Power
- Technical Gases
Valve Types
-
Type 811
pilot operated / Pop Action
DN 25 - DN 200 (1" - 8") -
Type 821
pilot operated / Modulate Action
DN 25 - DN 200 (1" - 8") -
Type 702, 712, 714, 731
Supplementary Loading System (additional option for safety valves)
- ( - )
