Danfoss CCMT 2, CCMT 8, CCMT 16, CCMT 42 Data sheet

Data Sheet

Electric regulating valve Type CCMT 2, 8, 16 and 42

One valve, 4 applications: HPV, GBV, EV and EPR

The CCMT is an electrically operated valve designed specically for operation in CO

systems.

The CCMT valve concept is designed to full global refrigeration requirements.

The valve is capable of functioning either as an expansion valve, as a pressure regulator for the gascooler or as a gas bypass valve with backpressure regulation in transcritical or subcritical applications.

Features:

• Designed for CO2 systems with maximum working pressure of 140 bar / 2030 psig.

• Applicable to R744 (CO2) and other common refrigerants. The CCMT is compatible with the

oil types PAG, POE and PVE.

• Regulating cone ensures optimum regulating accuracy, particularly at part load.

• Patented cone and balance design.

• The PEEK seat provides excellent valve tightness and robustness.

• Combined butt weld and solder connections.

• Top part with built-in strainer / lter.

• MOPD up to 90 bar / 1305 psi

• CCMT 16 – CCMT 42 is available with or without integrated pressure transmitter.

• Standard M12 connector for simple and exible connection to the motor driver.

• Low weight and compact design.

• Easy to service. Insert easily taken out by removing top part.

• For manual operation and service of the CCMT an AST-g service driver is available.

AI230186439989en-000901

Type

Description

Single pack

Code no.

AK-XM 208C

Stepper output module

080Z0023

EKE 1 Series

Superheat controller / driver

080G5300

080G5350

080G5400

AST-G

Manual service driver1034G0013

Superheat controller / driver, type

EKE 1 series

Electronic controller type EKC 326

and EKC 313

Electronic driver type AK-XM 208C

Temperature sensors type AKS and

pressure transmitters type MBS

Electric regulating valve, type CCMT 2, 8, 16 and 42

Portfolio overview

Related products

Table 1: Related products

Table 2: Portfolio overview

Danfoss

R64-3020.11

3 4

12345678Gas cooler

High pressure valve

Stepper motor driver

Master controller

Gas by-pass valve

Electric expansion valve

Evaporator

Electric pressure regulator

Electric regulating valve, type CCMT 2, 8, 16 and 42

Applications

The CCMT valve is developed for transcritical CO2 applications. The CCMT valve can be used in systems with ash gas bypass, parallel compression as well as in stand-alone applications.

The CCMT valve can be used in transcritical and subcritical conditions.

CCMT valves are typically used as ash gas bypass and high pressure regulation.

Figure 1: Application

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 (see the gure above) 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 the www.danfoss.com/CO2 for more information on CO2 systems.

Application 2 - Gas bypass Valve (GBV)

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 ash 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 applicaton the EKC 326A controller is recommended for CCMT 2 to CCMT 8

Application 3- Expansion Valve (EV)

A liquid expansion valve is typically used for injection in plate heat exchangers of CO2/CO2 cascades, or as an expansion valve for CO2 evaporators. For the liquid injection applications CCMT 2 to CCMT 8 is used with EKC 313 controller.

Application 4 – Electric pressure regulator (EPR)

With CCMT valves, it is possible to obtain an accurate temperature or pressure control by modulating the pressure in the evaporator.

Features

Description

Parameter

CCMT 2 – CCMT 8

CCMT 16 - CCMT 42

Compatibility refrigerants

R744 and other refrigerants. Not applicable for am- mable refrigerants and Ammonia.

Refrigerant oils

PAG, POE and PVE

MOPD

90 bar / 1305 psi

Max. working pressure (PS/MWP)

140 bar / 2030 psig

Refrigerant temperature range

(1)

–40 – 60 °C / -40 – 140 °F

Ambient temperature

–40 – 60 °C / -40 – 140 °F

Material specication

Stainless steel

Expected lifetime

Min. 15 years

Min. 10 years

Build in strainer / lter

Yes, 6 slots, 1.1 mm height x 10 mm wide

Yes, 250 micron

Comply with P.E.D.

Fluid group I / Article 3, paragraph 3

Approval

CE and UL approved

CE, UL, EAC, cUL, CRN

Features

Description

Parameter

CCMT 2 – CCMT 8

CCMT 16 - CCMT 42

Stepper motor type

Bi-polar - permanent magnet

Motor enclosure

IP 67

Step mode

2 phase full step, microstepping (recomended)

Phase resistance

52 Ω ±10%

29 Ω ±10%

Phase inductance

85 mH

36.7 mH

Phase current

Using chopper drive: 100 mA RMS -4 % +15 %

Using chopper drive: 300 mA RMS -4 % +15 %

Holding current

Voltage driver: Depends on application. Current controller: Full current allowed

Not needed. Duty cycle

100% duty cycle is allowed / 20% recommended

Max. total power

Voltage drive: 5.5 W Current drive: 1.3 W (UL: NEC class 2)

Voltage drive: 10W Current drive: 2.8 W

Step rate

Chopper current drive: Max. 300 steps/sec. (Recomended step rate: 200 steps/ sec.) Constant voltage drive: Max. 150 steps/sec.

Total full steps

CCMT 2 , 4 and 8: 1100 steps

CCMT 16 : 800, CCMT 24 : 1400, CCMT 30 : 2300 and CCMT 42 : 2200

Full travel time

CCMT 2, 4 and 8: 5 sec. ( at 220 steps/sec.)

CCMT 16 : 4 sec., CCMT 24 : 7 sec. CCMT 30 : 11.5 sec. and CCMT 42 : 11 sec.( at 200 steps/sec.)

Reference position

Overdriving against full close position

Overdrive in close position

Max. 10% of total full steps

Max. 10% of total full steps and maximum one overdrive performed per hour.

Overdrive in open position

Not Allowed

Electrical connection

M12 male connector with 0.3 m / 1 ft long cable

wire: 0.5 mm2 / 20 AWG)

Integrated M12 male connector

Compatible controllers

EKE 1A, EKE 1B, EKE 1C, EKC 313, EKC 326A , AK-XM 208C

EKE 1A, EKE 1B, EKE 1C, AK-XM 208C Pressure range

- 1 to 159 bar / 14.5 – 2306 psi sealed gauge

Electrical connection

Round Packard Metripack

Output signal

10 - 90 % of V supply

Supply voltage

5V DC ± 0.5V

Process connection

7/16-20 UNF-2A ISO 11926-2; Viton o-ring

Electric regulating valve, type CCMT 2, 8, 16 and 42

Product specication

Technical data

Table 3: Technical data

(1)

Measured at inlet of the valve

Electrical data

Table 4: Electrical data

Table 5: Pressure transmitter MBS 8250 (CCMT 16 - CCMT 42 with integrated pressure transmitter)

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