Pneumatic cryogenic ball valve CF8

The DQ641F series pneumatic cryogenic ball valve provides a highly dependable automated fluid control solution for pipelines operating under extreme sub zero temperature boundaries Precision machined from robust investment cast CF8 stainless steel, it utilizes an extended bonnet configuration to isolate the stem sealing elements from the deep freeze fluid path, effectively preventing ice formation and packing structural failure The valve assembly is integrated with a lightweight yet powerful rack and pinion pneumatic actuator for instantaneous quarter turn remote modulation This robust, clean room compatible flanged valve ensures reliable gas tight performance, making it essential for LNG distribution hubs, liquid nitrogen freezing systems, and industrial chemical air separation plants

Technical Specifications

• Valve Design Classification Pneumatic Actuated Extended Bonnet Deep Freeze Cryogenic Ball Valve

• Body Material Standard Premium Cast Stainless Steel CF8 ASTM A351 Specification

• Actuator Operational Drive Heavy Duty Rack and Pinion Aluminum Pneumatic Actuator Package

• Stem Insulation Layout Gas Column Extension Bonnet Design to Protect Packing Integrity

• Nominal Pipe Dimension DN 100 or 4 inch equivalent flanged line size

• Main Pipe Pressure Rating PN 16 Nominal Working Pressure 1.6 MPa equivalent

• Internal Sealing Seat Material Extreme Low Temperature Toughened PCTFE or Kel F Polymer Seats

• Ball Structural Profile Solid Stainless Steel Ball Precision Ground and Mirror Polished

• Main Pipeline Connection RF Raised Face Flanged Ends for Secure Bolted Alignment

• Main Flange Standard Specification EN 1092 1 DIN 2501 Flange Clearance Dimensions

• Pneumatic Control Air Supply 0.4 to 0.7 MPa Clean Dry Compressed Air Supply

• Air Port Joint Specification Threaded Female G 1 4 inch or NPT Instrument Air Connections

• Stem Mechanical Safety Blow out Proof High Strength Internal Seat Stem Structural Layout

• Stem Packing Material Die Formed Low Temperature Packing Rings with Spring Energized Seals

• Body Bonnet Gasket Spiral Wound Stainless Steel 304 with Non Freezing Flexible Composites

• Flow Geometry Configuration Full Port Flow Path for Maximum Flow Capacity and Low Pressure Drop

• Actuator Surface Protection Anodized Aluminum Body with Chemical Resistant Blue Coated End Caps

• Top Accessory Mount Platform Standard ISO 5211 Interface for Limit Switch Boxes and Solenoids

• Maximum Medium Working Temperature Minus 196 up to 80 degrees Celsius Fluid Suitability Range

• Cryogenic Cleaning Process Strict Clean Room Degreasing and Total Oil Free Packing Protocols

• Primary Media Suitability Liquefied Natural Gas Liquid Nitrogen Liquid Oxygen Liquid Carbon Dioxide

• Pressure Isolation Protocols Cryogenic Low Temperature Liquefied Gas Shell and Seat Leakage Evaluation