Safety Valves
Api
Pressure relief valves according to API 526 with standardized capacities and dimensions
- Compliance with API 526
- Diverse selection of high-alloy materials available as standard
- Longer lifetime due to hardened discs, partly stellited seats and integrated shielding of the optional bellows
- Single trim: Identical internal parts for S/G/L for cost-effective maintenance
- OTC Nanotightness: Exceeds the tightness requirements of API 527 by 50%
High Efficiency
Solutions for high plant efficiency
Pilot operated pressure relief valves
- Highest blow-off capacity of all series
- Tightness right up to set pressure
- Operating pressures up to 96% of the set pressure
- Back pressures up to 70% of the set pressure
- Backflow preventer integrated as a standard component
- Integrated Piping prevents damage and freezing
Supplementary Loading System
Equipment that enables the following pressure relief valve characteristics:
- Tightness right up to set pressure
- Operating pressures up to 97% of the set pressure
- Low loss of medium due to short opening times
- Function test and valve adjustment possible during operation
Suitable for all media temperatures
Compact Performance
Pressure relief valves with compact dimensions and high connection variety
Standard delivery time for all options 14 days ex works. Only a few more complex options have longer delivery times.
- Flanged and threaded valves with a wide range of options
- Small installation space with simultaneous horizontal installation option
- Bellows version available
- Set pressures up to 850 barg / 12325 psig
- LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%
High Performance
Pressure relief valves for all industrial applications
- High capacities in comparison to nominal size
- Wide range of nominal sizes
- Wide range of options available
- Excellent price-performance ratio
LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%
Modulate Action
Pressure relief valves for low pressure dynamics
- Low media loss when opening
- Ideal for thermal expansion
- Wide range of options available
- Constant back pressures up to 40 bar / 580 psig
- Excellent price-performance ratio
- LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%
Best Availability
Additional products for higher plant availability
Change-over valve in combination with pressure relief valves
- 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 pressure relief valves
- Complete, coordinated combination of one supplier with qualified resistance coefficients
Bursting discs with pressure relief valves in combination
- Tight up to the set pressure
- Protection of the pressure relief valve against corrosion and sticking
- Component-tested combination of pressure relief valve and bursting disc: Compliance with the 3% criterion – no consideration of the bursting disc in the sizing process
Clean Service
Pressure relief valves for food, beverage and pharmaceutical applications
Short and uniform delivery times for Clean Service safety valves: Get 155 top runner variants in three weeks. These top runners cover 90% of the supplied Clean Service valves.
- Better cleaning through:
- Low dead space ratio L/D from up to < 0.33
- HyTight Assembly: gap-free design of the internal parts
- Surfaces packages according to ASME BPE and DIN 11866 with a high surface quality up to Ra max = 0.375 µm / 15 µinch
- Easy process integration through cleaning (CIP) or sterilizing (SIP) with pneumatic lifting device possible
- Worldwide approvals, FDA-compliant elastomers and a wide range of aseptic connections
- Alternative to bursting disc
Critical Service
Pressure relief valves with PTFE-lining for corrosive media
- Medium-touched components made of corrosion resistant PTFE
- Pressure relief valve for the protection of highly corrosive media
- Cost-effective alternative to high-alloyed materials
- ATEX-compliant version in electrically conductive PTFE possible
S & R
Pressure relief valves for heating systems
- Standardized heating pressure relief valve
- Suitable for steam generators up to 1 bar overpressure
- Suitable for water heating systems up to 120 °C
Complies with DIN EN ISO 4126-1, DIN 4751 Part 2 and TRD 721 standards