TESCOM HV-7000 Series Two-Stage Pressure Regulator for Hydrogen Fuel Efficiency

The TESCOMTM HV-7000 Series 2-stage pressure-reducing regulator maximizes fuel efficiency and improves reliability in hydrogen-powered vehicles. Easy to install, the regulators provide stable pressure delivery, high reliability, and long service life for heavy-duty vehicles powered by fuel cells or hydrogen combustion engines.

The HV-7000 features 2-stage pressure reduction and a positive seal designed to deliver hydrogen to the fuel cell at optimal pressure in all flow conditions, even as the vehicle hydrogen storage tank depletes. The 2-stage pressure reduction significantly lessens decaying inlet characteristics compared to single-stage regulators, while the positive seal design offers superior shut-off performance. Together, these features can minimize fueling costs, as well as the risk of downstream component failure and downtime.

“A profitable fleet starts at the component level. That’s why the TESCOM HV-7000 Series is engineered for automotive purposes, with a range of innovative features that boost hydrogen fuel efficiency and reliability in a design that is easy for system integrators to install," said Fabrice Jannet, director of business development for hydrogen with Emerson’s discrete automation business.

HV-7000 features tied valve stems, integrated filters, and patented redundant seals that make the regulator contamination-resistant, improving vehicle service life and extending time on the road.

The redundant seal design extends cycle life if one seal experiences wear; the filter catches solid particles produced during installation before they can contact soft goods, and the tied valve stem counteracts seat contamination and wear. Preventing contamination and resulting leaks can help avoid fuel loss, safety hazards, system damage, and equipment downtime.

In addition to its benefits for the vehicle user, the HV-7000 is also designed to help fuel cell system manufacturers and integrators assemble the regulator into their system as quickly as possible. The regulator is compact and lightweight, with a flat shape and mounting holes designed specifically for mounting the regulator against other flat surfaces in the system. Such easy installation helps reduce manufacturing and procurement costs and eases scale-up as production volumes increase compared to other pressure regulation technologies.


  • Dual-stage pressure reduction minimizes decaying inlet characteristics and enables stable pressure delivery to fuel cell
  • Redundant seal design and integrated filter ensure safety and reliability
  • Superior shutoff performance and contamination resistance due to positive seal design
  • Flow rate up to 5 g/s
  • Wide outlet pressure range 10 to 30 bar (145 to 435 psi)
  • Corrosion-resistant, anodized nickel-plated aluminum body
  • Hydrogen-compatible materials
Nom. Inlet Service Pressure 700 bar (10,153 psi)
Max. Inlet Rated Pressure 875 bar (12,691 psi)
Min. Inlet Pressure At least 150% of outlet pressure
Design Proof Pressure 150% of nominal inlet service pressure
Pressure Rating Per Criteria of ANSI/ASME B31.3
Outlet Pressure Range 10 to 30 bar (145 to 435 psi)
Leakage Bubble-tight
Operating Temp. -40 to 185°F (-40 to 85°C)
Flow Capacity Cv=0.17; 5 g H2/s
Decaying Inlet Characteristic 6.2 mbar per 6.9 bar change in inlet pressure
(0.09 psi per 100 psi change in inlet pressure)
Filter 10 µm
Body Aluminum 6061-T6 w/Clear Anodic Coating
Seat Polyimide
O-Rings Nitrile
Main Valve 316 SST
Valve Spring 316 SST
Piston 316 SST
Sensor Aluminum 6061-T6
First & Second Stage Spring 17-7 SST
Remaining Parts 300 Series SST, Aluminum 60661-T6, Polyimide 
Cleaning CGA 4.1 and ASTM G93
Weight 3.5 lb. (1.6 kg)

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