+31 313 47 19 98 |
+31 313 47 19 98 |

RS350S gas pressure regulator now also available with adapters!

We have now added adapters to the delivery programme of the RS350S gas pressure regulator. With these adapters it is possible to easily replace other (old) regulators with a different inlet and outlet side (e.g. RMG 402 and 408) with the RS350S. Here are some possibilities (other lengths or sizes are available on request):

As the RS350S is very compact, it can be used as a replacement for various other (obsolete) gas pressure regulators without having to change the gas pressure regulation system. The installation dimension of the DN50 version of the RS350S is only 230 mm!

With a filling ring, the DN50 version of the RS350S can be extended to the DIN standard of 254 mm and the DN80 version to 310 mm.

Some other main advantages/features of the RS350S series are:

  • The DN50 version has a highly innovative insert that has now been patented. This allows the valve, seat, rolling diaphragm and O-rings to be changed within 15 minutes. The entire insert is changed with a replacement insert. The replaced insert can be sent back to Wigersma & Sikkema in the box of the replacement insert for reconditioning. Of course, you can also overhaul/clean it yourself. In this way you have a spare insert in stock for the next insert change. We have made some handy videos with all the steps needed to overhaul our RS350S regulator. You can find them here: RS350S – Wigersma & Sikkema (

The video where the insert is replaced can be found here:

  • If the valve size of the regulator needs to be changed when converting from L-gas to H-gas, this can also be done very easily by replacing the insert.
  • On 22 and 23 October 2020, KIWA investigated on behalf of Netbeheer Nederland whether existing gas pressure regulators for natural gas are suitable for operation with 100% hydrogen.  The Dutch network operator Rendo provided a regular gas pressure regulator station for this test. An RS350S DN50 regulator from Wigersma & Sikkema was installed in this gas pressure regulator station.

The following aspects were specifically investigated with both natural gas (L-gas) and 100% hydrogen:

  • The external tightness of the gas pressure regulator system when using hydrogen;
  • The correct functioning of the components when using hydrogen;
  • The internal leakage of the valves and safety devices;
  • The functioning of the safety devices;
  • The operating and control behaviour of the regulator.

The conclusion is that the gas pressure regulator station designed for natural gas can also be operated with 100 % hydrogen without any modifications. All components of the gas control line and the PLEXOR inspection system functioned without problems with 100 % hydrogen.

You can read the complete test report from KIWA here.

For more information or a quotation please contact us via:
Phone:         +31 (0) 313 47 19 98 

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