Electric Regulating Valves Type CCMT 3L, 5L, 8L and 10L
One valve, 2 applications: HPV, GBV
Introduction
The CCMT Light is an electrically operated valve designed specifically for operation in CO₂ systems. The CCMT Light valve concept is designed to fulfill global refrigeration requirements. The valve is capable of functioning either as a pressure regulator for the gascooler or as a gas bypass valve with back-pressure regulation in transcritical applications.
Features
- Designed for CO₂ systems with maximum working pressure of 140 bar / 2030 psig with steel connections
- Designed for CO₂ systems with maximum working pressure of 130 bar / 1885 psig (120 bar / 1740 psig for UL approval) with Bi-metal connection
- The CCMT Light is compatible with oil types PAG and POE
- All-in-one function module ensures optimum regulating accuracy, particularly at part load
- Patented cone and balance design
- The PTFE (TFM) seat provides excellent valve tightness
- Steel connections with combined butt weld, sleeve welding and brazing
- Unique bi-metal solder connections requiring small amount of heat
- MOPD up to 90 bar / 1305 psi
- Integrated M12 male connector for simple and flexible connection to the motor driver
- Low weight and compact design
- Easy to service from the top by removing a single function module insert
- For manual operation and service of the CCMT an AST-g service driver is available
Portfolio Overview
Related Products
Table 1: Portfolio overview
| Superheat controller / driver, type EKE 2U | Superheat controller / driver, type EKE 1P | Electronic driver type AK-PC 572 | Electronic driver type AK-PC 7XX | Electronic driver type AK-XM 208C (1) |
| (1) Please refer to CCMT Light installation guide for correct valve insulation recommendation related to usage of electronic driver type AK-XM-208C. | ||||
Applications
Application 1 and 2
The CCMT Light valve is developed for transcritical CO₂ applications. The CCMT valve can be used in systems with flash gas bypass, parallel compression as well as in stand-alone applications. The CCMT Light valve can be used in transcritical and subcritical conditions. CCMT Light valves are typically used as flash gas bypass and high pressure regulation.
A schematic showing a refrigeration system using CCMT Light valves. It illustrates two main applications: High Pressure Valve (HPV) and Gas Bypass Valve (GPV) in a transcritical CO₂ system. The diagram depicts components like compressors, gas coolers, intermediate heat exchangers, receivers, and expansion devices, with CCMT valves positioned at specific points for pressure regulation. Lines indicate refrigerant flow and pressure levels (HP High Pressure: 120-140 bar, HP Receiver Pressure: 60-90 bar, LP Suction Pressure MT: 45-55 bar, LP Suction Pressure LT: 25-30 bar). Associated controllers (AK-PC 572, EKE 1P, EKE 2U) and sensors (AKS 2050, AKS 11) are also shown.
Application 1 - High Pressure Valve (HPV)
The function of the high pressure valve is to control the high pressure in the system according to the reference from the controller. The reference can be set to obtain the optimum COP, optimum capacity or any other factors. Pressure optimization is performed by the CCMT valve, which is installed at the outlet of the gas cooler and a matching Danfoss controller. This design provides the possibility to optimize gas cooler pressure in all situations and intermediate receiver pressure independently.
Please refer to www.danfoss.com/CO2 for more information on CO₂ systems.
Application 2 - Gas bypass Valve (GPV)
A gas bypass valve is typically used to regulate the intermediate pressure in a transcritical CO₂ refrigeration system, in order to keep the intermediate pressure low. By venting flash gas generated through a gas bypass valve to the suction side of the compressor after the transcritcal expansion, the pressure can be kept at a safe level for all components situated in the liquid lines of a transcritical CO₂ system. The two phase mixture from the CCMT valve has to be separated before gas enters the gas bypass. For use in the gas bypass application the Danfoss AK controllers are recommended.
Product Specification
Technical Data
Table 2: Technical data
| Parameter | CCMT 3L, 5L, 8L and 10L |
| Compatibility refrigerants | R744 |
| Refrigerant oils | PAG and POE |
| MOPD | 90 bar / 1305 psi |
| Max. working pressure (PS/MWP) | 140 bar / 2030 psig with steel connections 130 bar / 1885 psig (120 bar / 1740 psig for UL approval) with Bi-metal connections |
| Refrigerant temperature range | -20–55 °C / 4–131 °F on valve inlet -40–55 °C / 40–131 °F on valve outlet |
| Ambient temperature | -40–50°C / -40–122 °F |
| Internal leak rate | < 2000 cm³ @dp=40 barg air |
| Valve body material specification | Stainless steel |
| Built-in strainer / filter | No(1) |
| Comply with P.E.D. | Fluid group I / Article 3, paragraph 3 |
| Approval | cURus, EAC |
| (1) Filter with a maximum mesh of 100 µm recommended to install on the inlet line that can resists particles size above 100 µm | |
Electrical Data
Table 3: Electrical data
| Parameter | CCMT 3L, 5L, 8L and 10L |
| Stepper motor type | Bi-polar - permanent magnet |
| Motor enclosure | IP 67 |
| Step mode | 2 phase full step, microstepping (recommended) |
| Phase resistance | 15 Ω ±10% |
| Phase inductance | 16 mH |
| Phase current | Using chopper drive: 350 mA RMS +/- 10% |
| Holding current | No voltage driver. Current controller: 20% of max. current |
| Duty cycle | 20% duty cycle of period time 50 sec |
| Max. total power | Current drive: 1.8 W |
| Step rate | Chopper current drive: 100 steps/sec |
| Total full steps | 210 steps |
| Full travel time | 2.1 sec. (at 100 steps/sec.) |
| Reference position | Overdriving against full close position |
| Overdrive in close position | Max. 10% of total full steps |
| Overdrive in open position | Not Allowed |
| Electrical connection | Integrated M12 male connector |
| Compatible controllers | EKE 1P, EKE 2U, AK-PC 572, AK-PC 7xx, AK-XM 208C(1) |
| (1) Please refer to CCMT Light installation guide for correct valve insulation recommendation related to usage of electronic driver type AK-XM 208C | |
WARNING: At power failure the CCMT Light valve will remain in the actual opening position it has at the moment of power failure, unless a safety device in the form of a battery backup is installed.
Design
An exploded view of the CCMT Light valve, detailing its internal components. Key parts include: 1. Connector socket, 2. Top nut, 3. Actuator cover, 4. Lock ring for motor, 5. Motor, 6. Motor housing, 7. O-ring, 8. Valve housing with connectors, 9. Actuator joint, 10. Slider, 11. Seal, 12. Nozzle holder assembly, 13. Nozzle, 14. O-ring.
Stepper Motor Switch Sequence
Table 4: Stepper motor switch sequence
| STEP | Coil I (B) | Coil II (A) | |||
| Red | Green | White | Black | ||
| 1 | + | + | + | + | CLOSING |
| 2 | + | + | + | + | |
| 3 | - | - | - | - | OPENING |
| 4 | - | - | - | - | |
| 1 | + | + | + | + |
Danfoss Cable Connections
Table 5: Danfoss cable connections
| Pin | Wire color |
| A1 | White |
| A2 | Black |
| B1 | Red |
| B2 | Green |
A diagram showing the M12 connector pins and their corresponding wire colors for the CCMT Light valve. Pin 1 is White (A1), Pin 2 is Black (A2), Pin 3 is Red (B1), and Pin 4 is Green (B2).
If the controller driving the CCMT Light valve is from another manufacturer than Danfoss or a custom design, the following points must be considered in order to overcome potential step loss. To ensure total closing of the valve, and to compensate the lost steps after a defined number of changes in opening degree, the controller should have a function to overdrive the valve in the closing direction. It is recommended to overdrive ten percent of the full steps range at appropriate intervals.
Flow Characteristic
A line graph plotting 'Y' (% of capacity full open) against 'X' (Opening %). Four distinct lines represent the flow characteristics for CCMT 3L, CCMT 5L, CCMT 8L, and CCMT 10L valves, showing how their flow capacity changes with the valve's opening percentage.
Accessories
M12 angle cable
M12 angle cable. The M12 angle female connector is intended for use with the standard M12 male connector on CCMT Light valves. The Danfoss cable is designed to offer high flexibility and proper tensile strength. The Danfoss M12 cable also consists of paired, twisted wires, which decreases mutual influence between signals transmitted along the cable and reduces influence of external sources of interference. The cable thus provides a higher degree of protection against lost steps compared to other cables.
Specification
Table 6: Specification
| Parameter | M12 standard |
| Jacket | PVC - black |
| Cable outer sheath | Oil - resistant |
| Water proof rating | IP 67 |
| Operating temperature range | -40–+80 °C |
| Wire type | Twisted pair, cross section 20 AWG / 0.5 mm² |
| Cable outer diameter | 7.0 mm |
| Minimum bending radius | 10 x cable diameter |
| Cable combustibility / test | Flame retardant / VW-1 / CSA FT - 1 |
| Reference standard | EN 61076-2-101 |
| LVD directive | UL style 2464 and DIN VDE 0812 73/23/EEC and 93/68/EEC |
Identification
Illustrates the label on the valve, showing fields for: A. Product type Code no., B. Manufacturing date, C. Meters/Feets, D. Country.
Connections and Dimensions
A diagram showing the M12 connector pinout, indicating which pin corresponds to which wire color (A1=White, A2=Black, B1=Red, B2=Green).
A simplified wiring diagram showing the color coding for the M12 connector pins: 1-White, 2-Black, 3-Red, 4-Green.
Shows the physical dimensions of the valve with steel connections, providing measurements in mm and inches for height, width, and connection sizes. Key dimensions include approximately 6.3 mm / 1/4 inch, 35 mm / 1.4 inch, 49 mm / 1.9 inch, and cable lengths of 2 + 0.089 meters / 6.6 + 0.3 feet and 8 + 0.3 meters / 26.2 + 1 feet.
Dimensions
Table 7: Valve dimensions with steel connections
146 mm [5.7 in] |
41 mm MIN [1.6 in] |
146 mm [5.7 in] |
41 mm MIN [1.6 in] |
Dimensions
Table 8: Valve dimensions with bi-metal connections
143 mm [5.6 in] |
41 mm MIN [1.6 in] |
141 mm [5.6 in] |
41 mm MIN [1.6 in] |
Ordering
Valve including actuator
Table 9: Valve including actuator
| Type | Connections [in] | Flow rate | Packing format | Code no. | ||
| Bi-metal | Steel | kv [m³/h] | Cv [gpm] | Single pack | ||
| CCMT 3L | 3/8 x 3/8 | - | 0.26 | 0.3 | 1 | 027H7239 |
| CCMT 3L | 1/2 x 1/2 | - | 0.26 | 0.3 | 1 | 027H7240 |
| CCMT 3L | - | 5/8 x 5/8 | 0.26 | 0.3 | 1 | 027H7241 |
| CCMT 3L | - | 7/8 x 7/8 | 0.26 | 0.3 | 1 | 027H7273 |
| CCMT 5L | 3/8 x 3/8 | - | 0.5 | 0.57 | 1 | 027H7242 |
| CCMT 5L | 1/2 x 1/2 | - | 0.5 | 0.57 | 1 | 027H7243 |
| CCMT 5L | - | 5/8 x 5/8 | 0.5 | 0.57 | 1 | 027H7245 |
| CCMT 5L | - | 7/8 x 7/8 | 0.5 | 0.57 | 1 | 027H7274 |
| CCMT 8L | 3/8 x 3/8 | - | 0.8 | 0.92 | 1 | 027H7275 |
| CCMT 8L | 1/2 x 1/2 | - | 0.8 | 0.92 | 1 | 027H7247 |
| CCMT 8L | - | 5/8 x 5/8 | 0.8 | 0.92 | 1 | 027H7250 |
| CCMT 8L | - | 7/8 x 7/8 | 0.8 | 0.92 | 1 | 027H7272 |
| CCMT 10L | 1/2 x 1/2 | - | 1.10 | 1.28 | 1 | 027H7277 |
| CCMT 10L | - | 5/8 x 5/8 | 1.10 | 1.28 | 1 | 027H7278 |
| CCMT 10L | - | 7/8 x 7/8 | 1.10 | 1.28 | 1 | 027H7279 |
Spareparts
Table 10: Spareparts
| Type | Description | Single pack | Code no. |
| Gasket | O-ring spare part kit for CCMT Light 3L, 5L, 8L and 10L | 1 | 027H7276 |
Ordering
Table 11: Ordering
| Cable | Cable length (L) | Insulation | Packing format | Code no. |
| PVC - black | 2 + 0.089 m / 6.6 + 0.3 ft | SR-PVC | Single pack | 034G7073 |
| PVC - black | 8 + 0.3 m / 26.2 +1 ft | SR-PVC | Single pack | 034G7074 |
Certificates, Declarations, and Approvals
The list contains all certificates, declarations, and approvals for this product type. Individual code number may have some or all of these approvals, and certain local approvals may not appear on the list. Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.
Table 12: Certificates, declarations, and approvals
| File name | Document type | Document topic | Approval authority |
| 19.10034.262 | Marine - Safety Certificate | PED | RMRS |
| RU Д-DK.АИ30.B.04995 | EAC Declaration | EAC | EAC |
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