Frequently Asked Questions (FAQs) about CK1 Check Valves
What are Parker CK1 check valves used for in refrigeration systems?
Parker CK1 check valves prevent reverse flow of refrigerant or gas in industrial refrigeration systems, helping maintain system efficiency and protect equipment from potential damage. These piston-type check valves are specifically designed for horizontal line installation and are compatible with ammonia and other common refrigerants, making them essential components for system protection and operational reliability.
What sizes and configurations are available for CK1 check valves?
CK1 check valves are available in port sizes ranging from 3/4" to larger industrial sizes, with socket weld connections in various configurations. Popular models include "3/4", S4A, 1" Socket Weld, 120G ST CK1" and "1-5/8", S4A, 2" Socket Weld, 120G ST CK1", with both standard and stainless trim (ST) options available for enhanced corrosion resistance and extended service life.
What's the difference between standard and ST (stainless trim) CK1 valves?
CK1 valves with "ST" designation feature stainless steel components in critical areas that contact refrigerant, providing superior corrosion resistance and longer service life. For example, "3/4", S4A, 1" Socket Weld, 120G ST CK1" offers enhanced durability compared to standard models, making them ideal for harsh environments or applications requiring extended maintenance intervals.
What repair kits are available for CK1 check valve maintenance?
Our inventory includes comprehensive repair components such as piston plug kits ("PLG KT,PSTN CK1"), opening stem kits ("STEM KT,OPENING CK1"), and gasket packages ("GSKT PK,CAP CK1"). We also stock specialized kits like "PLG KT,PSTN S5A/CK1" which are compatible with both S5A solenoids and CK1 check valves, providing maintenance flexibility for combination applications.
How do I choose the correct piston plug kit for my CK1 valve?
Piston plug kits are size-specific, ranging from "PLG KT,PSTN CK1 3/4" at $351.86 to "PLG KT,PSTN CK1/CK2 6" at $4,500.72 for the largest sizes. Some kits like "PLG KT,PSTN CK1 3 SPL .109" are special applications with specific orifice sizes (.109), designed for particular flow requirements or system configurations. Always match the exact size and specifications of your existing valve.
What does the "120G" and "120R" designation mean in CK1 model numbers?
The "120G" and "120R" designations in models like "3/4", S4A, 1" Socket Weld, 120G ST CK1" indicate different spring or operational characteristics. These specifications determine the valve's opening pressure, closing characteristics, and flow capacity. The slight price difference between 120G and 120R models (such as $1,980.18 vs $1,981.08) suggests minor configuration differences for specific application requirements.
Can CK1 check valves be used with solenoid valve combinations?
Yes, many repair kits are designed for combination applications, such as "PLG KT,PSTN S5A/CK1" which indicates compatibility with both S5A solenoid valves and CK1 check valves. This allows for integrated maintenance of combination valve assemblies where check valves work in conjunction with solenoid valves to provide both automated control and backflow prevention.
What installation requirements are critical for proper CK1 operation?
CK1 check valves are designed specifically for horizontal line installation and must be installed with proper flow direction as indicated by arrows on the valve body. The piston-type design requires horizontal mounting to ensure proper operation of the internal mechanism. Socket weld connections provide permanent, leak-tight installation suitable for high-pressure refrigeration applications.
How often should CK1 check valves be serviced or replaced?
CK1 check valves should be inspected annually for proper operation, with piston plug kits and other internal components replaced every 3-5 years depending on operating conditions and system cleanliness. Signs requiring service include failure to prevent backflow, excessive pressure drop, or visible damage. The field-serviceable design allows for economical maintenance using repair kits rather than complete valve replacement.
What's the difference between CK1 and CK1/CK2 designation in repair kits?
Repair kits labeled "CK1/CK2" (such as "PLG KT,PSTN CK1/CK2 6") are designed for compatibility with both CK1 and CK2 series check valves, providing maintenance flexibility for systems using different check valve models. CK1/CK2 kits are typically more expensive than CK1-only kits due to their broader compatibility and may include additional components to accommodate both valve series.
How do CK1 check valves differ from CK2 check valves?
CK1 check valves are designed specifically for horizontal line installation and feature a simpler piston-type design, while CK2 check valves offer enhanced performance with improved flow characteristics, better sealing capabilities, and suitability for both horizontal and vertical installation. CK2 models typically cost more than equivalent CK1 valves due to their advanced design features and enhanced reliability in critical system protection applications.
