Description

Drastar DRA500 Series Pressure Regulator is a single stage low pressure reducing regulator for high purity applications. Drastar DRA500 Series Pressure Regulator features a tied-diaphragm design as well as being springless in design and offering VCR connections.

• High flow: Cv = 0.5 at ¼” and Cv=0.5 at ½”. Inboard Leak Rate to <1 x 10-9 atm cc/sec Helium available. Optional Cv = 1.0 for higher flow applications.
• Made of 316L or VAR (double melt) stainless steel body with electropolishing, ideally suited to corrosive gases.
• Diaphragms available in either stainless steel 316L or Hastelloy.
• Spring-less type: “wave spring” (DRASTAR patent #10-1191514) used instead of a conventional spring to prevent particle which may be generated by the spring itself from long-time use fatigue, ideal for applications where ultra-high purity and cleaning is needed.
• Metal to metal diaphragm to body sealing for high leak integrity.
• Surface Treatment: E.P. up to 10Ra or 5Ra microinch(0.25 or 0.13 micrometer) to prevent particle generation.
• As tied-diaphragm type, DRA500 series offers supreme safety by preventing leaks notwithstanding any particle generation on the valve seat and protecting the rupture of diaphragm from toxic, pyrophoric, or corrosive gases.
• All works of welding, assembly, test, and cleaning are done in 100-class&10-class clean room.
• Decaying Inlet Characteristic: 1.2 psig /100 psig.
• Inlet pressures are 3600psig(250bar), 2200psig(151bar) or 600psig(42bar)
• Outlet pressures from 5psig (0.3bar) up to 150psig (10.3bar).
• Design proof pressure: 150% of maximum rated
• Various gauge port options including ¼” H.P.I.C, ¼” male or female swivel
• Various inlet and outlet port options including ¼” H.P.I.C, ¼” male or female swivel and tube stubs

Key specifications