WHO WE ARE
Flow Safe Provides High Performance Under Pressure
Dresser’s Flow Safe product line manufactures spring operated and pilot-operated high-performance pressure relief valves. Our products can be manufactured to meet the following standards or guidelines:
- ASME section XIII “UV” Stamped, National Board Certified
- PED “CE” or PER “UKCA” marks available
- DOT, API, KGS available
- Marine IGC available
- ISO 9001:2015 certifed facilities
- Canadian CRN Approval (all provinces/territories)
Why Choose Flow Safe for Overpressure Protection?
- Competitive pricing and deliveries
- Products are plug and play
- Three-year warranty on all products
- Custom sizes available
- High performance
- Low maintenance & little-to-no repairs
- Manufactured in the US
- 100% Hydrogen Compatible
- Well-stocked inventory
USA Manufactured
Designed and fabricated with pride in the USA with a local support team standing ready to assist you today!
Hydrogen Compatible
Flow Safe offers a multitude of pressure relief device configurations that ensure compatibility and long service life with a wide variety of fluids, including sweet or sour natural gas, hydrogen, cryogenic gases and more. Flow Safe’s soft-seated designs offer significant advantages over metal-seated designs with respect to seat tightness, which allows end users to operate their system pressures closer to set pressure.
Pressure Relief Valves
A pressure relief valve is a safety device designed to protect a pressurized vessel or system during an overpressure situation – when the system is increased beyond the specified design pressure or maximum allowable working pressure. Reliability of the pressure relief device is pertinent, hence its simplistic and compatible design.
Dresser’s patented Flow Safe product line offers a variety of pressure relief valves, made to order per customer specifications.
Search & Select an Overpressure Protection Product
Select a product type, region or both. Or, search for the product by name. Once you’ve found what you are looking for, click the image or button to access product details.
Product Brand
Direct Spring, Conventional – ASME code (F84/F85)
Direct Spring, Balanced – ASME code (F84L)
Direct Spring, Balanced – ASME code (F88)
Pilot-Operated – ASME code (F7000/F8000)
Pilot Operated (F70PR)
Unloader (F70U)
Liquid Surge (F9000)
Safe-T Whistle
Flow Safe Application Guide
Application Guide
| Valve Model | Service | Operation | Pressure Range | Application |
|---|---|---|---|---|
| F84M | Gas / Vapor | Direct Spring, Snap Acting | 15 - 15,000 psig (1.03 - 1,034 barg) | Storage tanks Thermal relief instrument panels Compressors |
| F85M | Gas / Vapor | Direct Spring, Snap Acting | 15 - 10,313 psig (1.03 - 711 barg) | Storage tanks Thermal relief instrument panels Compressors |
| F84 F85 | Gas / Vapor | Direct Spring, Snap Acting | 15 - 9,612 psig (1.03 - 662 barg) | Air/gas equipment Processes equipment Thermal relief |
| F84L | Liquid | Direct Spring, Balanced | 30 – 24,277 psig (2.1 - 1674 barg) | Lube oil Dowtherm Systems with variable or constant backpressure |
| F88 | Gas / Liquid / 2-Phase | Direct Spring, Balanced | 50 – 8,382 psig (3.5 - 578 barg) | Systems with variable or constant backpressure |
| F70PR | Gas / Liquid / 2-Phase | Pilot Operated, Modulating | 10” wc – 285 psig (.025 – 19.6 barg) | Gas regulator Meter protection Positive displacement blowers |
| F70U | Gas / Liquid / 2-Phase | Unloading, Manual/Solenoid | 5 – 285 psig (.35 – 19.6 barg) | Unloading valves (dump valves) Compressors Blowers Fire protection |
| F7200 F8200 | Gas / Vapor | Pilot Operated, Snap Acting, Non-Flowing | 15 – 6,000 psig (1.03 - 413 barg) | Ambient and Cryogenic service (flashing) |
| F7300 F8300 | Gas / Liquid / 2-Phase | Pilot Operated, Modulating, Flowing | 15 – 6,000 psig (1.03 - 413 barg) | Ambient and Cryogenic service |
| F7500 F8500 | Gas / Liquid / 2-Phase | Pilot Operated, Modulating, Non-Flowing | 15 – 6,000 psig (1.03 - 413 barg) | Ambient and Cryogenic service |
| F9000 | Liquid | Pilot-less, Modulating | 100 – 3705 psig (6.9 – 255 barg) | Product pipeline with liquid surge or hammer |
100% Hydrogen Compatible Safety Valves.
Body and trim ensure compatibility and long service life with myriad lading fluids, such as sweet or sour natural gas, hydrogen, cryogenic gases and more.
Our Commitment
Local Support, Large Inventory and Quick Turnarounds
Flow Safe products are the only pressure relief devices to offer a standard 3-year limited product warranty!
Introducing the F84 Micro HP Safety Relief Valve.
Set Pressure Expansion to 15,000 psig on -1 and -2 Orifices.
What We Do
Tailored Products for Unique Needs
Correctly Sized to Reduce Chatter and Save Product in Case of an Overpressure Event
Three-Year Warranty Reduces Cost of Ownership
Operate Closer to Set Pressure with Soft-Seated Flow Safe SRV
