Oxygen cylinder valve D389S

stainless steelgreyhigh-pressure

Product description
D389S UHP cylinder valve is designed to maintain maximum gas purity. The tied-diaphragm sealing and tight diaphragm technology prevent particle generation in gas-wetted parts. The valve uses an oleo-pneumatic actuator to increase seat closing force while minimizing gas-wetted volume, making it suitable for pure and ultra-pure gases.

Key advantages

• Tied diaphragm design with minimal gas-wetted volume
• Combined soft and metal seat design with low permeation rate
• Patented operation mechanism
• Threaded weep hole for pipe-away connection
• Hydraulic amplifier providing strong closing force
• Option to connect a leak detector

Dimensional drawings / visual
Dimensional and product drawings are available for reference (illustrative drawing on the product page).

Technical specifications

• Gas type: Pure & Ultra-pure
• Connections: Per (inter)national standards or customer specifications
• Working pressure: 200 bar
• Flow rate: CV = 055
• Temperature range: -40 to +65 °C
• Body materials: Stainless steel 1.4435 (AISI 316L) / Hastelloy® 2.4602 (UNS N06022)
• Seat orifice size: 6 mm
• Leak rate: 1.10⁻8 mbar·l/s (as specified)
• Marking: π0029 (according to TPED), valve part number, manufacturing date, connections, seat material, 3 stars
• Options: Mechanical and electronic position indicators available on request