Frequently Asked Questions (FAQs) about CK2 Check Valves
What are Parker CK2 check valves used for in refrigeration systems?
Parker CK2 check valves prevent reverse flow of refrigerant or gas in industrial refrigeration systems, providing enhanced backflow protection compared to Parker CK1 models. These advanced piston-type check valves are suitable for both horizontal and vertical installation and are compatible with ammonia and other common refrigerants, offering superior performance in demanding industrial applications where reliable backflow prevention is critical.
What sizes and configurations are available for CK2 check valves?
CK2 check valves are available in sizes from 1-1/4" to 6" with socket weld and weld neck connections. Models range from compact configurations like "CK2D65AF10X00X0NSN 2-1/2'' CK2D 3/8'' F S6A" to large industrial units such as "CK2A2S20WP2NSN 6 CK2 3/4 S 6 Weld Neck" priced at $13,616.21, reflecting the substantial engineering and materials required for larger valve assemblies.
What's the difference between CK2, CK2D, CK2A1S, and CK2A2S series?
Different CK2 series designations indicate various design configurations: CK2D models (like "CK2D65AS10W65B3NSN") are dual-purpose valves, CK2A1S models are single-action configurations, and CK2A2S models are dual-action assemblies. The pricing reflects complexity, with CK2A2S models like the 6" version costing over $13,000 due to their sophisticated dual-action mechanisms and larger size.
What repair kits are available for CK2 check valve maintenance?
Our inventory includes piston plug kits ("PLG KT,PSTN CK2"), opening stem kits ("STEM KT,OPENING CK2"), and cover gasket packages ("GSKT PK,COVER CK2") in various sizes. We also stock dual-compatibility kits like "PLG KT,PSTN CK1/CK2" for systems using both valve types. The "NO BL" designation in some piston plug kits indicates no bleed configuration for specific applications.
How do CK2 valves differ from CK1 check valves?
CK2 check valves offer enhanced performance compared to CK1 models, including improved flow characteristics, better sealing capabilities, and more robust construction for demanding applications. CK2 models typically cost more than equivalent CK1 valves due to their advanced design features and enhanced reliability in critical system protection applications.
What does the "NO BL" designation mean in CK2 piston plug kits?
"NO BL" (No Bleed) in kits like "PLG KT,PSTN CK2 2-1/2 NO BL" indicates piston plugs without bleed holes, designed for applications requiring absolute backflow prevention without any bypass flow. These specialized configurations are essential in systems where even minimal reverse flow could cause operational issues or safety concerns.
What are the different pilot designations (S6A, A120G, etc.) in CK2 models?
Pilot designations like "S6A" and "A120G" in models such as "CK2D65AF10X00X0NSN" and "CK2D65AF10X00B3NSN" indicate different pilot control mechanisms or spring configurations. These specifications affect the valve's opening pressure, response characteristics, and integration with system control schemes, with pricing varying based on the complexity of the pilot system.
How do I choose between socket weld and weld neck CK2 connections?
Socket weld connections (like "CK2A1S20SP1NSN 5 CK2 3/4 S 5 Socket Weld" at $7,999.09) provide excellent leak protection for permanent installations, while weld neck options (such as "CK2A1S20WP1NSN 5 CK2 3/4 S 5 Weld Neck" at $8,278.37) offer superior stress distribution for high-pressure applications. Weld neck connections typically cost slightly more due to their enhanced engineering and material requirements.
What maintenance procedures are recommended for CK2 check valves?
Regular maintenance includes annual inspection for proper operation, checking for backflow prevention effectiveness, and periodic replacement of internal components using appropriate repair kits. Cover gasket packages should be replaced during major maintenance, with costs ranging from $57.06 for 1-1/4" valves to $225.51 for 6" models, reflecting the size and complexity of larger valve assemblies.
Are CK2 check valves suitable for both ammonia and halocarbon applications?
Yes, Parker CK2 check valves are designed for compatibility with ammonia and other common refrigerants used in industrial applications. The robust construction and material selection ensure reliable operation across various refrigerant types, though specific model selection should consider your particular refrigerant, operating pressures, and temperature requirements for optimal performance and service life.
