CPCE Hot gas bypass regulator, Liquid gas mixer, type LG (accessory)
CPCE hot gas bypass regulator adapt compressor capacity to actual evaporator load.
They are designed for installation in a bypass line between the low and high pressure sides of the refrigeration system, for hot gas injection between the evaporator and thermostatic expansion valve.
Injection should be arranged to occur through an LG liquid gas mixer (purchased separately).
FEATURES
CPCE hot gas bypass regulator
- Superior control accuracy
- Direct connection to system suction line regulates hot gas injection independent of evaporator pressure drop
- The regulator increases evaporator gas velocity, thus ensuring better oil return to compressor
- Protection against too low an evaporating temperature, i.e. prevents evaporator icing
May be used in the following EX range: Category 3 (Zone 2)
LG liquid gas mixer (purchased separately)
- LG provides homogeneous mixing of the liquid and hot gas refrigerant injected into the evaporator
- Prevents high suction superheat by combining hot gas injection with expansion valve characteristics
- LG can be used for hot gas defrosting or reverse cycle systems
| Refrigerants | R22, R1234ze *), R1270 *), R134a, R290 *), R404A, R407A, R407C, R407F, R448A, R449A, R450A, R452A, R507A, R513A, R600 *), R600a *) *) only LG 12-16 and LG 16-22 |
| Regulating range | pe = 0 – 6 bar (0 – 87 psig) |
| Factory setting = 0.4 bar (5.8 psig) |
| Maximum working pressure | PS/MWP PS = 28 bar (406 psig) |
| Maximum test pressure | Pe = 31 bar (449 psig) |
| Medium temperature range | -45 – 130 °C |
| Maximum differential pressure | Δp = 18 bar (261 psig) |
| Maximum media temperature | 140 °C |
| Minimum media temperature | -50 °C |
This product is evaluated for R290, R600, R600a, R1234ze, R1270 by ignition source assessment in accordance with standard EN13463-1.
For complete list of approved refrigerants, visit www.products.danfoss.com and search for individual code numbers, where refrigerants are listed as part of technical data.
Nominal Capacity
Danfoss
Code
Number | Valve
Type | Connection Type | Rated capacity 1) [kW] |
| R22 | R134a | R404A/R507 | R407C |
| 034N0082 | CPCE 12 | 1/2 Solder | 17.4 | 7.9 | 16.4 | 19.0 |
| 034N0083 | CPCE 15 | 5/8 Solder | 25.6 | 11.6 | 24.2 | 27.9 |
| 034N0084 | CPCE 22 | 7/8 Solder | 34.0 | 15.2 | 32.0 | 37.1 |
1) Rated capacity is the regulator capacity at
evaporating temperature te = -10 °C
condensing temperature tc = +30°C
reduction of suction temperature / suction pressure Δts = 4 K.
Danfoss
Code
Number | Valve
Type | Connection |
| Outlet - ODM | Inlet hot gas - ODF | Inlet liquid - ODF |
| (inches) | (mm) | (inches) | (mm) | (inches) | (mm) |
| 069G4001 | LG 12-16 | 5/8 | 16 | 1/2 | 12 | 5/8 | 16 |
| 069G4002 | LG 12-22 | 7/8 | 22 | 1/2 | 12 | 7/8 | 22 |
| 069G4003 | LG 16-28 | 1-1/8 | 28 | 5/8 | 16 | 1-1/8 | 28 |
| 069G4004 | LG 22-35 | 1-3/8" | 35 | 7/8 | 22 | 1-3/8" | 35 |
For optimum performance it is important to select a CPCE valve according to system conditions and application.