http://www.flowstar.co.uk/http://www.flowstar.co.uk/

Flowstar Ni Relief Valve Type 5.3 & 5.2
Totally enclosed right angle safety valve. Type 5.3 with brass body / soft seat. Type 5.2 with stainless steel body/soft seat. SIZE RANGES: ¼€ BSP inlet x 3/8€ BSP outlet 3/8€ BSP inlet x 3/8€ BSP outlet ¼€ NPT inlet x 3/8 BSP outlet (5.2 only) SET PRESSURE RANGES: Type 5.3 0.5 to 120 BAR (G) Type 5.2 0.4 to 200 BAR (G). SEAT MATERIAL: Standard Viton (options from EPDM Kalrez) (In future as overflow valve ACC to Ce-certification, directive 97/23/EC ped).



http://www.dabengineering.com/burst_disc_assy.htmhttp://www.dabengineering.com/burst_disc_assy.htm

The above seems like a small company and may well be willing / able to supply a lower rating burst disc.