Parker Refrigeration Specialties CK4A-8 Check Valve
The Parker Refrigeration Specialties CK4A-8 Check Valve is a rugged, 2-inch ODS inline check valve engineered for heavy-duty industrial refrigeration applications. Built with a ductile iron body (GGG-40.3), this spring-closing check valve provides a positive shut-off to prevent refrigerant backflow in liquid lines, suction lines, and hot gas discharge lines. As a veteran-preferred component for screw compressor systems, the CK4A-8 is particularly effective in high-speed compressor discharge and re-circulating overfeed systems, where it maintains system integrity by preventing liquid flood back and maintaining receiver pressure.
This compact in-line valve features a lapped stainless steel seat and a removable seat plate utilizing a dual-seal design: a primary O-ring seal coupled with a secondary metal-to-metal beveled knife edge. Designed to meet Pressure Equipment Directive (PED) standards and UL listed through 3-inch sizes, it supports a Maximum Rated Pressure (MRP) of 500 psi (34.5 bar). The CK4A series is widely compatible with ammonia, R-22, R-502, and other common halocarbon refrigerants. Note that for ammonia service, ODS copper flanges are not suitable; use FPT or weld-neck alternatives instead.
Key Contractor Benefits:
- Flexible Installation: The light spring-loaded design allows for mounting in any position without sacrificing backflow prevention reliability.
- Superior Low-Temperature Performance: Rated for suction temperatures as low as -60°F (-50°C), making it ideal for low-temp industrial evaporators.
- Low Crack Pressure: Requires a minimum differential of only 0.60 psi (0.04 bar) to reach a fully open position, minimizing system pressure drop.
- Simplified Maintenance: The inline design and removable internal assembly allow for field servicing and debris removal without cutting out the valve body.
- High Flow Efficiency: Boasts a flow coefficient (Cv) of 46.0, ensuring high-capacity flow for 2" port size refrigeration circuits.
Common Installation Questions:
Can this valve be used on pulsating discharge lines?
While excellent for high-speed piston and screw compressors, it is not recommended for slow-speed reciprocating compressors (under 800 RPM) or lines where flow pulsations harmonize with the valve’s natural frequency, which can cause internal "slapping."
Does the CK4A-8 include flanges?
No, this is a less flanges model. You must use the appropriate 2" flange kit (ODS, FPT, or SW) for your specific piping requirements.
Is it compatible with ammonia?
Yes, the valve body is compatible, but you must avoid the ODS copper flanges shown in some halocarbon configurations. Always use steel flanges for ammonia applications.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $607.33
-65%$607.33
$212.57Parker Refrigeration Specialties CK4A-8 Check Valve
The Parker Refrigeration Specialties CK4A-8 Check Valve is a rugged, 2-inch ODS inline check valve engineered for heavy-duty industrial refrigeration applications. Built with a ductile iron body (GGG-40.3), this spring-closing check valve provides a positive shut-off to prevent refrigerant backflow in liquid lines, suction lines, and hot gas discharge lines. As a veteran-preferred component for screw compressor systems, the CK4A-8 is particularly effective in high-speed compressor discharge and re-circulating overfeed systems, where it maintains system integrity by preventing liquid flood back and maintaining receiver pressure.
This compact in-line valve features a lapped stainless steel seat and a removable seat plate utilizing a dual-seal design: a primary O-ring seal coupled with a secondary metal-to-metal beveled knife edge. Designed to meet Pressure Equipment Directive (PED) standards and UL listed through 3-inch sizes, it supports a Maximum Rated Pressure (MRP) of 500 psi (34.5 bar). The CK4A series is widely compatible with ammonia, R-22, R-502, and other common halocarbon refrigerants. Note that for ammonia service, ODS copper flanges are not suitable; use FPT or weld-neck alternatives instead.
Key Contractor Benefits:
- Flexible Installation: The light spring-loaded design allows for mounting in any position without sacrificing backflow prevention reliability.
- Superior Low-Temperature Performance: Rated for suction temperatures as low as -60°F (-50°C), making it ideal for low-temp industrial evaporators.
- Low Crack Pressure: Requires a minimum differential of only 0.60 psi (0.04 bar) to reach a fully open position, minimizing system pressure drop.
- Simplified Maintenance: The inline design and removable internal assembly allow for field servicing and debris removal without cutting out the valve body.
- High Flow Efficiency: Boasts a flow coefficient (Cv) of 46.0, ensuring high-capacity flow for 2" port size refrigeration circuits.
Common Installation Questions:
Can this valve be used on pulsating discharge lines?
While excellent for high-speed piston and screw compressors, it is not recommended for slow-speed reciprocating compressors (under 800 RPM) or lines where flow pulsations harmonize with the valve’s natural frequency, which can cause internal "slapping."
Does the CK4A-8 include flanges?
No, this is a less flanges model. You must use the appropriate 2" flange kit (ODS, FPT, or SW) for your specific piping requirements.
Is it compatible with ammonia?
Yes, the valve body is compatible, but you must avoid the ODS copper flanges shown in some halocarbon configurations. Always use steel flanges for ammonia applications.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Parker Refrigeration Specialties CK4A-8 Check Valve is a rugged, 2-inch ODS inline check valve engineered for heavy-duty industrial refrigeration applications. Built with a ductile iron body (GGG-40.3), this spring-closing check valve provides a positive shut-off to prevent refrigerant backflow in liquid lines, suction lines, and hot gas discharge lines. As a veteran-preferred component for screw compressor systems, the CK4A-8 is particularly effective in high-speed compressor discharge and re-circulating overfeed systems, where it maintains system integrity by preventing liquid flood back and maintaining receiver pressure.
This compact in-line valve features a lapped stainless steel seat and a removable seat plate utilizing a dual-seal design: a primary O-ring seal coupled with a secondary metal-to-metal beveled knife edge. Designed to meet Pressure Equipment Directive (PED) standards and UL listed through 3-inch sizes, it supports a Maximum Rated Pressure (MRP) of 500 psi (34.5 bar). The CK4A series is widely compatible with ammonia, R-22, R-502, and other common halocarbon refrigerants. Note that for ammonia service, ODS copper flanges are not suitable; use FPT or weld-neck alternatives instead.
Key Contractor Benefits:
- Flexible Installation: The light spring-loaded design allows for mounting in any position without sacrificing backflow prevention reliability.
- Superior Low-Temperature Performance: Rated for suction temperatures as low as -60°F (-50°C), making it ideal for low-temp industrial evaporators.
- Low Crack Pressure: Requires a minimum differential of only 0.60 psi (0.04 bar) to reach a fully open position, minimizing system pressure drop.
- Simplified Maintenance: The inline design and removable internal assembly allow for field servicing and debris removal without cutting out the valve body.
- High Flow Efficiency: Boasts a flow coefficient (Cv) of 46.0, ensuring high-capacity flow for 2" port size refrigeration circuits.
Common Installation Questions:
Can this valve be used on pulsating discharge lines?
While excellent for high-speed piston and screw compressors, it is not recommended for slow-speed reciprocating compressors (under 800 RPM) or lines where flow pulsations harmonize with the valve’s natural frequency, which can cause internal "slapping."
Does the CK4A-8 include flanges?
No, this is a less flanges model. You must use the appropriate 2" flange kit (ODS, FPT, or SW) for your specific piping requirements.
Is it compatible with ammonia?
Yes, the valve body is compatible, but you must avoid the ODS copper flanges shown in some halocarbon configurations. Always use steel flanges for ammonia applications.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
