Engineered for Performance. Certified for Safety.
H&H Level is proud to announce the addition of Bliss pressure relief valves to our product lineup. Renowned for their precision engineering and global certifications, Bliss offers an extensive range of solutions for pressure management across industrial sectors. Whether protecting pipelines, process systems, or energy plants – Bliss valves combine proven reliability with innovative designs.
28 Series – Versatile, Durable, API 526 Compliant
The Bliss 28 Series conventional and bellows type valves are built to meet the demanding requirements of the process, power, and chemical industries. Certified by the National Board and compliant with ASME Section VIII standards, these valves are ideal for air, gas, steam, and liquid services.
- Available in all sizes and pressure ratings per API 526
- Certified capacities and exceptional seat tightness
- Convertible design: Conventional to Bellows and vice-versa
- Wide material selection: 316 Stainless Steel, Monel, Hastelloy C
- O-ring seat option for extreme leak-tightness
- Long service life with lowest total cost of ownership
29 Series – Compact, High-Pressure, Corrosion-Resistant
Need a pressure relief solution for aggressive media or high-pressure systems? The Bliss 29 Series delivers:
- Sizes and ratings per API 526 for global compatibility
- Set pressures from 15 psig up to 6500 psig
- Soft and Teflon® seat designs for bubble-tight reseating
- Ideal for air, steam, vapor, and liquid process applications
- Optional NACE-compliant trims for corrosive environments
- Balanced design versions available to eliminate backpressure effects
31 Series – Short Blowdown, Remote Sensing, Soft Seat
For critical applications requiring tight reseating and stable operation, the Bliss 31 Series pressure operated relief valves (PORVs) offer:
- Certified under ASME UV and National Board NB standards
- Leak-free operation even when working close to set pressure
- Optional remote sensing connection for enhanced performance
- Bubble-tight reseating and minimized blowdown losses
- Engineered for air, gas, vapor, and liquid media
Why Bliss?
When safety, reliability, and flexibility matter most, Bliss delivers. With decades of experience, global certifications, and a focus on continuous improvement, Bliss valves provide superior protection across industries like Oil & Gas, Chemical Processing, Petrochemical, and Power Generation.
Bliss doesn’t just meet standards.
They define them.