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.

Direct Spring, Conventional – ASME code (F84/F85)

Direct Spring, Conventional – ASME code (F84/F85)

ASME Section XIII ("UV" stamped) enhanced performance direct ...
Direct Spring, Balanced – ASME code (F84L)

Direct Spring, Balanced – ASME code (F84L)

ASME Section XIII ("UV" stamped) enhanced performance direct ...
Direct Spring, Balanced – ASME code (F88)

Direct Spring, Balanced – ASME code (F88)

ASME Section XIII ("UV" stamped) enhanced performance direct ...
Pilot-Operated – ASME code (F7000/F8000)

Pilot-Operated – ASME code (F7000/F8000)

ASME Section XIII ("UV" stamped) enhanced performance ...
Pilot Operated (F70PR)

Pilot Operated (F70PR)

Enhanced performance pilot-operated relief valve designed for ...
Unloader (F70U)

Unloader (F70U)

Unloader valve provides a means to control flow for a variety of ...
Liquid Surge (F9000)

Liquid Surge (F9000)

The Flow Safe SurgeFlow series has been developed exclusively ...
Safe-T Whistle

Safe-T Whistle

Flow Safe, Safe-T Whistle is designed to provide an audible ...

Flow Safe Application Guide

Application Guide
Valve ModelServiceOperationPressure RangeApplication
F84MGas / Vapor

Direct Spring,
Snap Acting
15 - 15,000 psig
(1.03 - 1,034 barg)
Storage tanks
Thermal relief instrument panels
Compressors
F85MGas / Vapor

Direct Spring,
Snap Acting
15 - 10,313 psig
(1.03 - 711 barg)
Storage tanks
Thermal relief instrument panels
Compressors
F84
F85
Gas / VaporDirect Spring,
Snap Acting
15 - 9,612 psig
(1.03 - 662 barg)
Air/gas equipment
Processes equipment
Thermal relief
F84LLiquidDirect Spring,
Balanced
30 – 24,277 psig
(2.1 - 1674 barg)
Lube oil
Dowtherm
Systems with variable or constant backpressure
F88Gas / Liquid / 2-PhaseDirect Spring,
Balanced
50 – 8,382 psig
(3.5 - 578 barg)
Systems with variable or constant backpressure
F70PRGas / Liquid / 2-PhasePilot Operated,
Modulating
10” wc – 285 psig
(.025 – 19.6 barg)
Gas regulator
Meter protection
Positive displacement blowers
F70UGas / Liquid / 2-PhaseUnloading,
Manual/Solenoid
5 – 285 psig
(.35 – 19.6 barg)
Unloading valves (dump valves)
Compressors
Blowers
Fire protection
F7200
F8200
Gas / VaporPilot Operated,
Snap Acting, Non-Flowing
15 – 6,000 psig
(1.03 - 413 barg)

Ambient and Cryogenic service (flashing)
F7300
F8300
Gas / Liquid / 2-PhasePilot Operated,
Modulating, Flowing
15 – 6,000 psig
(1.03 - 413 barg)

Ambient and Cryogenic service

F7500
F8500
Gas / Liquid / 2-PhasePilot Operated,
Modulating, Non-Flowing
15 – 6,000 psig
(1.03 - 413 barg)

Ambient and Cryogenic service

F9000Liquid

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

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