Angle Seat Check Valves from the KAK CV & CVR series are precision-engineered for reliable one-way flow control in HVACR pipelines. Designed to offer maximum flexibility, these valves are available in both Straightway (CV) and Angleway (CVR) structures. The robust brass body is available with Flare (SAE) or Solder (ODF) connections to ensure a secure, leak-proof seal across various system layouts.
Key Features
- Flexible Connections: Supports both threaded Flare (SAE) and sweat Solder (ODF) types for easy installation across various pipeline configurations.
- High Pressure Performance: Optimized for systems with a maximum working pressure of 46 bar (PS) and tested up to 60 bar to ensure ultimate safety, making them an ideal high-quality replacement for NRV and high-differential NRVH series specifications.
- Enhanced Durability: Equipped with an internal damping piston to minimize chatter and vibration in high-pulse discharge lines.
- Wide Compatibility: Designed for use with R134a, R410A, R407C, R404A, R507 refrigerants, and compatible with POE/MO/PAG oils.
- Technical Equivalence: Manufactured to match the performance standards of industry-leading models while offering KAK’s signature reliability.
Applications
- HVAC condensing units, heat pump circuits, and multi-compressor racks.
- Commercial refrigeration and industrial cold storage systems.
- Reliable performance in liquid lines, suction lines, and hot gas bypass applications.
*Note: NRV and NRVH are trademarks of their respective owners. KAK products are independent high-quality replacements compatible with these series specifications.
| Applicable Refrigerant | HCFC or HFC (Customer Specified) |
| Applicable Medium Temperature | -50°C ~ +140°C |
| MAX. Working Pressure (PS) | 46 bar |
| MAX. Test Pressure | 60 bar |
| Model | Type | Connection Specs | I.D.(mm) | Kv(m³/h) | |
|---|---|---|---|---|---|
| Flare | Solder | ||||
| CV-6 | Straightway | 1/4 SAE | / | 4.8 | 0.56 |
| CV-6T | Straightway | / | 1/4 ODF | 4.8 | 0.56 |
| CV-10 | Straightway | 3/8 SAE | / | 8 | 1.43 |
| CV-10GT | Straightway | / | φ10 ODF | 8 | 1.43 |
| CV-12 | Straightway | 1/2 SAE | / | 10 | 2.05 |
| CV-12T | Straightway | / | 1/2 ODF | 10 | 2.05 |
| CV-16 | Straightway | 5/8 SAE | / | 13 | 3.60 |
| CV-16T | Straightway | / | 5/8 ODF | 13 | 3.60 |
| CV-19 | Straightway | 3/4 SAE | / | 16 | 5.50 |
| CV-19T | Straightway | / | 3/4 ODF | 16 | 5.50 |
| CV-22T | Straightway | / | 7/8 ODF | 19 | 8.50 |
| CVR-22 | Angleway | / | 7/8 ODF | 19 | 8.50 |
| CVRH-28 | Angleway | / | 1-1/8 ODF | 26 | 19.0 |
| CVRH-35 | Angleway | / | 1-3/8 ODF | 31 | 29.0 |
| CVRH-42 | Angleway | / | 1-5/8 ODF | 31 | 30.0 |
Structure
Overall size
| Model | L | M | L1 | S |
| CV-6 | 58 | 7/16-20UNF | 14 | 19 |
| CV-10 | 62 | 5/8-18UNF | 16 | 21 |
| CV-12 | 68 | 3/4-16UNF | 18 | 24 |
| CV-16 | 78 | 7/8-14UNF | 21 | 27 |
| CV-19 | 90 | 1-1/16-14UNF | 24 | 32 |
| L | D | L | ||
| CV-6T | 95 | φ6.5 | 7 | |
| CV-10GT | 109 | φ10.1 | 8 | |
| CV-12T | 119 | φ12.8 | 10 | |
| CV-16T | 138 | φ16.1 | 14 | |
| CV-19T | 150 | φ19.2 | 16 | |
| CV-22T | 175.5 | φ22.3 | 17 | |
| L | D | L1 | H | |
| CVR-22 | 84 | φ22.3 | 17 | 136.5 |
| CVRH-28 | 113 | φ28.7 | 20 | 184 |
| CVRH-35 | 126 | φ35.2 | 25 | 197 |
| CVRH-42 | 126 | φ41.5 | 29 | 197 |
FAQ
Q1. What is the difference between CV and CVR series check valves?
A. The CV series features a Straightway design for inline installation, while the CVR series features an Angleway (90°) design. Both share the same internal piston mechanism and performance standards but cater to different piping layouts.
Q2. What are the pressure ratings for these valves?
A. KAK check valves are designed with a Maximum Working Pressure (PS) of 46 bar, making them suitable for R410A and other high-pressure systems. Each unit is factory-tested up to 60 bar to ensure ultimate safety and reliability.
Q3. Can these valves replace standard NRV and NRVH models?
A. Yes. Our CV and CVR series are designed to be 100% technically compatible with standard industry models (like NRV/NRVH). They offer equivalent flow rates (Kv values) and dimensions for seamless replacement in existing HVACR systems.
Q4. Are they compatible with R32 and R410A refrigerants?
A. Absolutely. The valves are compatible with a wide range of HFC and HCFC refrigerants, including R410A, R32, R134a, R404A, and R507, as well as common refrigeration oils like POE, MO, and PAG.
Q5. Do you offer both Flare and Solder connections?
A. Yes. We provide Flare (SAE) threaded connections for easy maintenance and Solder (ODF) connections for permanent, leak-proof welding[cite: 1]. Please refer to our Model Selection table for specific size availability.
Q6. Does KAK provide OEM or customized services?
A. Yes. We offer full OEM/ODM support, including customized cracking pressures, private labeling (Logo), and specific packaging to meet your project requirements.