Servo-assisted 2/2-way piston valve up to 450 bar – Type 6481

Bürkert Fluid Control Systems

  • Servo-assisted 2/2-way piston valve up to 450 bar
  • Hydrogen-resistant screwed fluid housing
  • Function test with forming gas at nominal pressure
  • Piston system with mechanical seal bearings
  • Explosion-proof design ATEX and IECEx

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Servo-assisted 2/2-way piston valve up to 450 bar – Type 6481

  • The valve type 6481 is a servo-controlled piston valve for hydrogen applications up to a nominal diameter of 50 mm.
  • A minimum differential pressure of 1 bar is required to support the opening and closing process. 
  • To increase the pressure resistance in contact with hydrogen, the plunger guiding tube and stopper are screwed together.
  • Only certified 3.1 materials suitable for hydrogen are used.
  • Each valve is subject to a functional test at maximum nominal pressure.
  • On request, the push-over coil can be provided as a Zone 1 or Category 2 explosion-proof version.

Key Features

  • Mechanical line connection: Threaded G3/8 – G2
  • Nominal width: 12, 25, 40 & 50 mm
  • Versions: NC, 2-way
  • Pressure range: 1 to 450 bar (depending on version)
  • Leakage rate at nominal pressure: 5x 10-5 mbar l/s.
  • Long service life of more than 250,000 switching operations
  • Medium temperature range: -27 to +80 °C
  • Protection class: IP65
  • Optional approvals/conformities: Hydrogen suitability, ISO 19880-3, Pressure Equipment Directive 2014/68/EU Category IV

Application areas

  • Hydrogen production - Electrolyser
  • Hydrogen use – Stationary fuel cells, Mobile fuel cells
  • Hydrogen test benches - Industrialization, Scale up
  • Hydrogen infrastructure

Contact us

  • With more than 25 years of experience in the hydrogen industry, we know what matters when it comes to controlling gases and liquids. Interested? Feel free to contact us via the vendor form.
Brand Bürkert Fluid Control Systems
Max Pressure (in bar) 450
Min Pressure (in bar) 1
Ingress Protection Rating IP65
Compliant with ATEX 2014/34/EU, IECEx, IEC-60529, ISO 19880-3
Max Ambient Temperature (in °C) 50
Min Ambient Temperature (in °C) -27
Max Medium Temperature (in °C) 80
Min Medium Temperature (in °C) -27
Bürkert Fluid Control Systems

www.burkert.com

Innovative fluidic solutions for a clean future with hydrogen Bürkert offers the right fluidic solutions for the complete hydrogen value chain. Bürkert approved products ensure high safety, the highest possible output and low-maintenance operation - today and in the future. In addition to valves, sensors, and automation, Bürkert is also a reliable partner when it comes to customised and tailor-made solutions. With more than 20 years of experience in the hydrogen industry, they know what matters. Together with you, Bürkert will find the best and most efficient solution for your fluidics challenges. In doing so, Bürkert is your partner, from development to large-scale production - for a quick time-to-market and long-term market success.

99% of all inquiries get answered within 5 days. Your inquiry will be sent immediately to the right person within the vendor organisation.

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