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305 series 

Adjustable relief vavle

Liquid and Gas service

End of line configuration - 2 ports

Inline configuration - 3 ports

General info

307 Series - Adjustable relief valve

Specifically designed for H2 operation, the 307 series pressure relief valve offers a simple solution to most H2 pressure relieving applications. O ring seating provides a reliable and repeatable resealing characteristic, and a range of spring options offers a valve capable of fine control and reliable operation. The 307 series can be configured to be in-line or end of line, with multiple porting configurations available as standard, and bespoke solutions available upon request. EC79 certification is pending.

Features and benefits

- Elastomer seat offers very reliable bubble tight shut off at all operating pressures

- End of line or Inline configurations offered

- SS316L material ensures resistance against Hydrogen embrittlement.

- Reliable, repeatable operation

- 420 bar max inlet pressure

- EC79 certification pending - adheres to requirements of R134

Common applications

- Specifically developed for Hydrogen service

- Compressed air supply systems requiring medium flow rate. 

- Often used for instrumentation and sampling systems. 


307 series - Spec tab - Spec table.jpg
307 Series - spec tab - reg mounted.JPG

Panel mounting details

Maximum panel thickness:  5.0 mm

307 series - spec tab - panel cut out.JPG


Use the tool below to identify the type of spares kit required, then contact the sales office, quoting the names of the spares kits required and the serial number of the regulator.

The sales office will then provide a spares kit part number and price.


307 – Available spares kits - Hover over a option below to highlight the parts supplied in the kit:

The 307 Series has a modular design, meaning the main valve sub assembly can be replaced without removing the regulator from the line.

ALWAYS refer to operating and maintenance instructions before carrying out any maintenance


Factory servicing is available on request.

Contact sales office with serial number for details and price.


Please contact office if you require any additional information. 


Soft seals spares kit


Click the links below to download documents



Additional document downloads


Click on a link to download a file. 


Please contact office if you require any additional information.  

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307 series - Datasheet

103 series - downlaods - general assembly.jpg

307 series - General assembly drawing

307 series - Operating & Maintenance instructions

307 series - List of available spares

307 series - 3D STP Model

PRESREG Valves product brochure

- Use tool to generate part number

- Contact sales office with part number for a price

307 series - ordering info - part number generator.jpg

Ordering info

Use the tool below to generate a part number. 

Contact the sales office with part number for prices.

We are happy to offer assistance and advice on generating part numbers and advising the right regulator for the right application.  

Contact the sales office for more information.  Contact Us.

The following features are standard on all models:

-  Maximum inlet pressure:  100 bar

-  Spring loaded

-  Non-venting

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