Compact two-stage line pressure regulator type Sigma II in accordance with ISO 2503 for technical, medical, corrosive, laboratory and high-purity gases. Two-stage design provides absolutely constant outlet pressure even as inlet pressure fluctuates. Features: compact design with high control accuracy; inlet and outlet: 1/4" NPT-F, alternatively compression fitting; outlet pressure gauge Ø 50 mm (DIN EN 837); 50 µm inlet filter; relief valve per stage; gas purity up to 6.0; temperature range -40 to +70 °C; body materials: chrome-plated brass, stainless steel or Monel; diaphragm: stainless steel or Hastelloy; seat: PCTFE; ECD compatible; ATEX compliant (94/9/EG); PED compliant (97/23/EG). Options: inlet pressure gauge Ø 50 mm, shut-off or metering valve, gas purging system (internal or external), contact gauge or pressure transmitter.