Hard-seat design.

• Metal-to-metal hard seat design is 100% helium leak-tested to 1 x 10^–4 ml/s at 200 psi
• 10,000 psi pressure rating at 200 °F (93 °C)
• Blowout-proof stem

Series 400 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.