Soft-seat design.

• Soft seat design is 100% helium leak-tested to 1 x 10^–4 ml/s at 200 psi
• Designed with Delrin® acetal seat
• Straight-through porting for bidirectional, high capacity flow and easy roddable cleaning

Series 500 needle valves are high quality instrument grade valves. They are the right choice when your application calls for positive shut-off or precise flow control. They work effectively with most gases and liquids.