LESER® Change-over Valves
Technical specifications
Technical data change-over valve
| Nominal Diameter at Inlet | DN 25 - DN 400 | 1" - 16" |
| Temperature (in accordance with DIN EN) | -273°C to +450°C | -459°F to +842°F |
| Body Material | 1.0619, 1.4408 |WCB/WCC, LCB, CF8M |
| Valve Connection | Flange in accordance with DIN EN 1092-1 and ASME B 16.5 |
Technical data bursting disc
| Nominal Diameter at Inlet | DN 25 - DN 150 | 1" - 6" |
| Temperature | -30°C to +550°C | -22°F to +1022°F (depending on the material) |
| Valve Connection | Flange in accordance with DIN EN 1092-1 and ASME B 16.5 |
| Material bursting element | 1.4404, 1.4435, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal | 316L, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal |
| Material sealing membrane | 1.4401, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal | 316, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal |
| Material bursting disc carrier | 1.4571, 1.4404, Hastelloy® C4, 1.4571 Tantal coated | 316Ti, 316L, Hastelloy® C4, 316Ti Tantal coated |
Technical documentation
Benefits
- Most economical solution for redundant protection
- Flow-optimized design for minimal inlet pressure loss
- Modular system for adaptation to required connection diameters and pressure stages
- Robust and maintenance-free design and simple changeover
- Short delivery times synchronized with the safety valves
- Complete, coordinated combination of one supplier with qualified resistance coefficients
- Tight up to the set pressure
- Protection of the safety valve against corrosion and sticking
- Component-tested combination of safety valve and bursting disc: Compliance with the 3% criterion - no consideration of the bursting disc in the sizing process
Change-over valve in combination with safety valves
Bursting discs with safety valves in combination
Applications
- Chemical
- Oil & Gas
- Petrochemical
- Energy
- Technical Gases
Engineering services
Free engineering services:
Support for the calculation, selection and configuration of LESER safety valves
- Support for the selection of spare parts for installed LESER valves
- Assistance in the selection of springs and parts when changing the set pressure of the LESER safety valve
- Assistance in restoring certificates and passports for LESER safety valves
- Assistance in finding additional options for LESER relief valves
- Provision of technical documentation for the operation and maintenance of safety valves.
- Training of the Customer's personnel on the operation and repair of LESER safety valves
Logistic services:
- Standard delivery "to the door", as well as the possibility of shipment of goods directly from the Factory on the terms of FCA Incoterms 2020
- Support in customs clearance of goods shipped on FCA terms, including the provision of certificates of conformity, as well as letters on the absence of the need for mandatory certification for certain groups of goods