Danfoss Electronics KVL Data Sheet

Data sheet
Crankcase pressure regulator Type KVL
Crankcase pressure regulator type KVL is fitted in the suction line ahead of the compressor.
KVL protects the compressor motor against overload during start-up after long standstill periods or after defrost periods (high pressure in evaporator).
Features • Accurate, adjustable pressure regulation
• Wide capacity and operating ranges
• Pulsation damping design
• Stainless steel bellows
• Compact angle design for easy installation in any position
• “Hermetic” brazed construction
• Available in a wide size range of flare and ODF solder types
• KVL 12 – KVL 22: may be used in the following EX range: Category 3 (Zone 2)
© Danfoss | DCS (az) | 2018.03
DKRCC.PD.HH0.D8.02 | 1
Data sheet | Crankcase pressure regulator, type KVL
Approvals
Technical data
UL LISTED, file SA7200 EAN
Refrigerants
Regulating range
Maximum working pressure PS/MWP = 18 bar
Maximum test pressure Pe = 19.8 bar
Medium temperature range -60 – 130 °C
Maximum P-band
Kv-value1) with maximum P-band
1
) The Kv value is the flow of water in [m3 / h] at a pressure drop across valve of 1 bar, ρ = 1000 kg / m3.
This product (KVL 12 – KVL 22) is evaluated for R290, R600, R600a, R1270 by ignition source assessment in accordance with standard EN13463-1.
R22, R1270*, R134a, R290*, R40 4A, R407A, R407C, R407F, R448A, R449A, R450A, R452A, R507A, R513A, R600*, R600a* * KVL 12 – KVL 22 only
0.2 – 6 bar
Factory setting = 2 bar
KVL 12 – 22: 2 bar
KVL 28 – 35: 1.5 bar
KVL 12 – 22: 3.2 m3 / h
KVL 28 – 35: 8.0 m3 / h
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.
Ordering
Rated capacity 1)
Type
KVL 12
KVL 15 7.1 5.3 6.3 6.5
KVL 22 7.1 5.3 6.3 6.5
KVL 28
KVL 35 17.8 13.2 15.9 16.4 1 3⁄8 35 034L0052
1
) Rated capacity is the regulator capacity at: suction temperature ts = -10 °C condensing temperature tc = 25 °C pressure drop in regulator Δp = 0.2 bar To select the product for other conditions or refrigerants, use Danfoss Coolselector®2.
2
) KVL supplied without flare nuts. Separate flare nuts can be supplied: 1⁄2 in / 12 mm, code no. 011L1103 5⁄8 in / 16 mm, code no. 011L1167
R22 R134a
7.1 5.3 6.3 6.4
7.1 5.3 6.3 6.4 12 034L0048
17.8 13.2 15.9 16.4 1 1⁄8 034L0046
17.8 13.2 15.9 16.4 28 034L0051
[kW]
R404A/
R507
R407C [in] [mm] [in] [mm]
Flare
connection 2)
1
2 12 034L0041
5
8 16 034L0042
Code no.
Solder ODF
1
2 034L0043
5
8 16 034L0049
7
8 22 034L0045
Code no.
The connection dimensions chosen must not be too small, as gas velocities in excess of 40 m / s at the inlet of the regulator can result in flow noise.
REACH requirements
© Danfoss | DCS (az) | 2018.03
All Danfoss products fulfill the requirements in REACH. One of the obligations in REACH is to inform customers about presence of Candidate list substances if any, we hereby inform you about one substance on the candidate list: an O-ring used in this product contains Diisopentylphthalat (CAS no: 605-50-5) in a concentration above 0.1% w/w.
DKRCC.PD.HH0.D8.02 | 2
Data sheet | Crankcase pressure regulator, type KVL
Capacity
Max. regulator capacity Qe 1)
Pressure
drop in
Type
KVL 12 KVL 15 KVL 22
KVL 28 KVL 35
1
) The values in the capacity tables refer to the evaporator capacity and are based on liquid temperature tl = 25 °C
regulator
∆p
[bar] [bar] -35 -30 -25 -20 -15 -10 -5 0 5 10 15
0.1 1 1.9 1.2
0.1 2 3.0 3.3 3.1 2.1 0.2
0.1 3 3.0 3.3 3.7 4.1 4.0 2.2
0.1 4 3.0 3.3 3.7 4.1 4.6 5.0 3.9 0.1
0.1 5 3.0 3.3 3.7 4.1 4.6 5.0 5.5 5.2 1.0
0.1 6 3.0 3.3 3.7 4.1 4.6 5.0 5.5 6.0 6.2 1.3
0.2 1 2.6 1.7
0.2 2 4.2 4.7 4.4 3.0 0.2
0.2 3 4.2 4.7 5.3 5.9 5.6 3.1
0.2 4 4.2 4.7 5.3 5.9 6.5 7.1 5.5 0.1
0.2 5 4.2 4.7 5.3 5.9 6.5 7.1 7.8 7.3
0.2 6 4.2 4.7 5.3 5.9 6.5 7.1 7.8 8.5 8.7 1.9
0.3 1 3.2 2.0
0.3 2 5.2 5.8 5.4 3.7 0.3
0.3 3 5.2 5.8 6.5 7.2 6.9 3.8
0.3 4 5.2 5.8 6.5 7.2 8.0 8.8 6.7 0.2
0.3 5 5.2 5.8 6.5 7.2 8.0 8.8 9.6 9.0 1.7
0.3 6 5.2 5.8 6.5 7.2 8.0 8.8 9.6 10.5 10.7 2.3
0.1 1 4.1 2.6
0.1 2 7.4 7.9 7.0 4.6 0.4
0.1 3 7.4 8.3 9.3 10.3 8.9 4.7
0.1 4 7.4 8.3 9.3 10.3 11.4 12.3 8.5 0.2
0.1 5 7.4 8.3 9.3 10.3 11.4 12.6 13.8 11.6 2.2
0.1 6 7.4 8.3 9.3 10.3 11.4 12.6 13.8 15.1 13.9 2.8
0.2 1 5.8 3.6
0.2 2 10.6 11.2 9.8 6.5 0.5
0.2 3 10.6 11.8 13.2 14.7 12.5 6.6
0.2 4 10.6 11.8 13.2 14.7 16.2 17.5 12.0 0.3
0.2 5 10.6 11.8 13.2 14.7 16.2 17.8 19.6 16.4 3.1
0.2 6 10.6 11.8 13.2 14.7 16.2 17.8 19.6 21.4 19.6 4.0
0.3 1 7.0 4.4
0.3 2 13.0 13.8 12.1 8.0 0.6
0.3 3 13.0 14.6 16.3 18.0 15.4 8.1
0.3 4 13.0 14.6 16.3 18.0 19.9 21.5 14.7 0.3
0.3 5 13.0 14.6 16.3 18.0 19.9 21.9 24.1 20.0 3.7
0.3 6 13.0 14.6 16.3 18.0 19.9 21.9 24.1 26.3 24.1 4.9
Maximum
suction
pressure
PS
Capacity Qe in [kW] at suction temperature ts after the regulator [°C]
R22
© Danfoss | DCS (az) | 2018.03
Correction factors for liquid temperature t
tl [°C] 10 15 20 25 30 35 40 45 50
R22 0.90 0.93 0.96 1.0 1.05 1.10 1.13 1.18 1.24
Plant capacity × correction factor = the values in the table
l
DKRCC.PD.HH0.D8.02 | 3
Data sheet | Crankcase pressure regulator, type KVL
Capacity (continued)
Max. regulator capacity Qe 1)
Pressure
drop in
Type
KVL 12 KVL 15 KVL 22
KVL 28 KVL 35
1
) The values in the capacity tables refer to the evaporator capacity and are based on liquid temperature tl = 25 °C
regulator
∆p
[bar] [bar] -30 -25 -20 -15 -10 -5 0 5 10 15 20
0.1 1 1.8 1.2
0.1 2 2.9 3.3 3.1 2.2 0.3
0.1 3 2.9 3.3 3.7 4.1 4.1 2.4
0.1 4 2.9 3.3 3.7 4.1 4.6 5.1 4.2 0.7
0.1 5 2.9 3.3 3.7 4.1 4.6 5.1 5.6 5.6 1.8
0.1 6 2.9 3.3 3.7 4.2 4.6 5.1 5.6 6.2 6.7
0.2 1 2.6 1.6
0.2 2 4.2 4.7 4.4 3.1 0.4
0.2 3 4.2 4.7 5.3 5.9 5.8 3.4
0.2 4 4.2 4.7 5.3 5.9 6.5 7.2 5.9 0.9
0.2 5 4.2 4.7 5.3 5.9 6.5 7.2 7.9 8.0 2.6
0.2 6 4.2 4.7 5.3 5.9 6.5 7.2 7.9 9.5 8.7
0.3 1 3.2 2.0
0.3 2 5.2 5.8 5.5 3.8 0.5
0.3 3 5.2 5.8 6.5 7.2 7.1 4.2
0.3 4 5.2 5.8 6.5 7.2 8.0 8.9 7.3 1.1
0.3 5 5.2 5.8 6.5 7.2 8.0 8.9 9.8 9.8 3.2
0.3 6 5.8 6.5 7.2 8.0 8.9 9.8 10.7 10.7 11.7
0.1 1 4.0 2.5
0.1 2 7.3 7.8 6.9 4.8 0.6
0.1 3 7.3 8.2 9.3 10.3 9.1 5.2
0.1 4 7.3 8.2 9.3 10.3 11.5 12.7 9.2 1.4
0.1 5 7.3 8.2 9.3 10.3 11.5 12.7 14.0 12.6 3.9
0.1 6 7.3 8.2 9.3 10.3 11.5 12.7 14.0 15.4 15.3
0.2 1 5.6 3.5
0.2 2 10.5 11.1 9.8 6.7 0.9
0.2 3 10.5 11.8 13.2 14.7 12.9 7.3
0.2 4 10.5 11.8 13.2 14.7 16.3 18.1 13.1 2.0
0.2 5 10.5 11.8 13.2 14.7 16.3 18.1 19.9 17.8 5.6
0.2 6 10.5 11.8 13.2 14.7 16.3 18.1 19.9 21.9 21.7
0.3 1 6.9 4.3
0.3 2 12.9 13.7 12.1 8.2 1.1
0.3 3 12.9 14.5 16.2 18.1 15.8 9.0
0.3 4 12.9 14.5 16.2 18.1 20.1 22.2
0.3 5 12.9 14.5 16.2 18.1 20.1 22.2 24.5 21.9 6.8
0.3 6 12.9 14.5 16.2 18.1 20.1 22.2 24.5 26.9 26.6
Maximum
suction
pressure
PS
Capacity Qe in [kW] at suction temperature ts after the regulator [°C]
R134 a
© Danfoss | DCS (az) | 2018.03
Correction factors for liquid temperature t
tl [°C] 10 15 20 25 30 35 40 45 50
R134a 0.88 0.92 0.96 1.0 1.05 1.10 1.16 1.23 1.31
Plant capacity × correction factor = the values in the table
l
DKRCC.PD.HH0.D8.02 | 4
Data sheet | Crankcase pressure regulator, type KVL
Capacity (continued)
Max. regulator capacity Qe 1)
Pressure
drop in
Type
KVL 12 KVL 15 KVL 22
KVL 28 KVL 35
1
) The values in the capacity tables refer to the evaporator capacity and are based on liquid temperature tl = 25 °C
regulator
∆p
[bar] [bar] -35 -30 -25 -20 -15 -10 -5 0 5 10 15
0.1 1 0.9
0.1 2 2.5 2.4 1.7 0.3
0.1 3 2.5 2.9 3.2 3.2 1.9
0.1 4 2.5 2.9 3.2 3.6 4.0 3.4 0.5
0.1 5 2.5 2.9 3.2 3.6 4.0 4.5 4.5 1.5
0.1 6 2.5 2.9 3.2 3.6 4.0 4.5 4.9 5.5 2.1
0.2 1 1.3
0.2 2 3.6 3.4 2.5 0.4
0.2 3 3.6 4.0 4.6 4.5 2.7
0.2 4 3.6 4.0 4.6 5.1 5.7 4.8 0.8
0.2 5 3.6 4.0 4.6 5.1 5.7 6.3 6.4 2.2
0.2 6 3.6 4.0 4.6 5.1 5.7 6.3 7.0 7.8 2.9
0.3 1 1.6
0.3 2 4.4 4.2 3.0 0.4
0.3 3 4.4 5.0 5.6 5.6 3.3
0.3 4 4.4 5.0 5.6 6.3 7.0 5.9 1.0
0.3 5 4.4 5.0 5.6 6.3 7.0 7.8 7.8 2.6
0.3 6 4.4 5.0 5.6 6.3 7.0 7.8 8.6 9.6 3.5
0.1 1 2.0
0.1 2 5.9 5.4 3.7 0.5
0.1 3 6.2 7.1 8.0 7.2 4.2
0.1 4 6.2 7.1 8.0 9.1 10.0 7.4 1.2
0.1 5 6.2 7.1 8.0 9.1 10.0 11.2 10.1 3.3
0.1 6 6.2 7.1 8.0 9.1 10.0 11.2 12.4 12.4 4.4
0.2 1 2.7
0.2 2 8.4 7.6 5.4 0.9
0.2 3 8.9 10.1 11.4 10.3 5.9
0.2 4 8.9 10.1 11.4 12.9 14.3 10.6 1.7
0.2 5 8.9 10.1 11.4 12.9 14.3 15.9 14.4 4.6
0.2 6 8.9 10.1 11.4 12.9 14.3 15.9 17.5 17.6 6.3
0.3 1 3.4
0.3 2 10.4 9.3 6.5 1.1
0.3 3 10.9 12.5 14.0 12.5 7.2
0.3 4 10.9 12.5 14.0 15.8 17.6 13.0 2.1
0.3 5 10.9 12.5 14.0 15.8 17.6 19.6 17.7 5.6
0.3 6 10.9 12.5 14.0 15.8 17.6 19.6 21.6 21.7 7.7
Maximum
suction
pressure
PS
Capacity Qe in [kW] at suction temperature ts after the regulator [°C]
R404A/R507
© Danfoss | DCS (az) | 2018.03
Correction factors for liquid temperature t
tl [°C] 10 15 20 25 30 35 40 45 50
R404A/R507 0.84 0.89 0.94 1.0 1.07 1.16 1.26 1.40 1.57
Plant capacity × correction factor = the values in the table
l
DKRCC.PD.HH0.D8.02 | 5
Data sheet | Crankcase pressure regulator, type KVL
Capacity (continued)
Max. regulator capacity Qe 1)
Pressure
drop in
Type
KVL 12 KVL 15 KVL 22
KVL 28 KVL 35
1
) The values in the capacity tables refer to the evaporator capacity and are based on liquid temperature tl = 25 °C
regulator
∆p
[bar] [bar] -35 -30 -25 -20 -15 -10 -5 0 5 10 15
0.1 1 1.6 1.0
0.1 2 2.5 2.8 2.7 1.9 0.2
0.1 3 2.5 2.8 3.2 3.6 3.6 2.0
0.1 4 2.5 2.8 3.2 3.6 4.1 4.6 3.6 0.1
0.1 5 2.5 2.8 3.2 3.6 4.1 4.6 5.1 4.9 1.0
0.1 6 2.5 2.8 3.2 3.6 4.1 4.6 5.1 5.6 6.0 1.3
0.2 1 2.2 1.5
0.2 2 3.5 4.0 3.8 2.7 0.2
0.2 3 3.5 4.0 4.6 5.3 5.0 2.9
0.2 4 3.5 4.0 4.6 5.3 5.9 6.5 5.1 0.1
0.2 5 3.5 4.0 4.6 5.3 5.9 6.5 7.3 6.9
0.2 6 3.5 4.0 4.6 5.3 5.9 6.5 7.3 8.0 8.4 1.8
0.3 1 2.7 1.7
0.3 2 4.4 5.0 4.7 3.3 0.3
0.3 3 4.4 5.0 5.7 6.4 6.2 3.5
0.3 4 4.4 5.0 5.7 6.4 7.2 8.1 6.2 0.2
0.3 5 4.4 5.0 5.7 6.4 7.2 8.1 8.9 8.5 1.6
0.3 6 4.4 5.0 5.7 6.4 7.2 8.1 8.9 9.9 10.3 2.2
0.1 1 3.4 2.2
0.1 2 6.2 6.8 6.1 4.1 0.4
0.1 3 6.2 7.1 8.1 9.2 8.0 4.3
0.1 4 6.2 7.1 8.1 9.2 10.3 11.3 7.9 0.2
0.1 5 6.2 7.1 8.1 9.2 10.3 11.6 12.8 10.9 2.1
0.1 6 6.2 7.1 8.1 9.2 10.3 11.6 12.8 14.2 13.3 2.7
0.2 1 4.9 3.1
0.2 2 8.9 9.6 8.5 5.8 0.2
0.2 3 8.9 10.1 11.5 13.1 11.3 6.1
0.2 4 8.9 10.1 11.5 13.1 14.6 16.1 11.2 0.3
0.2 5 8.9 10.1 11.5 13.1 14.6 16.4 18.2 15.4 3.0
0.2 6 8.9 10.1 11.5 13.1 14.6 16.4 18.2 20.1 18.8 3.9
0.3 1 5.9 3.8
0.3 2 10.9 11.9 10.5 7.1 0.5
0.3 3 10.9 12.6 14.2 16.0 13.9 7.5
0.3 4 10.9 12.6 14.2 16.0 17.9 19.8 13.7 0.3
0.3 5 10.9 12.6 14.2 16.0 17.9 20.1 22.4 18.8 3.6
0.3 6 10.9 12.6 14.2 16.0 17.9 20.1 22.4 24.7 23.1 4.8
Maximum
suction
pressure
PS
Capacity Qe in [kW] at suction temperature ts after the regulator [°C]
R407C
© Danfoss | DCS (az) | 2018.03
Correction factors for liquid temperature t
tl [°C] 10 15 20 25 30 35 40 45 50
R407C 0.88 0.91 0.95 1.0 1.05 1.11 1.18 1.26 1.35
Plant capacity × correction factor = the values in the table
l
DKRCC.PD.HH0.D8.02 | 6
Data sheet | Crankcase pressure regulator, type KVL
Sizing
For optimum performance, it is important to select a KVL valve according to system conditions and application.
Valve selection Example
When selecting the appropriate valve it may be necessary to convert the actual evaporator capacity using a correction factor. This is required when your system conditions are different than the table conditions.
The selection is also dependant on the acceptable pressure drop across the valve.
The following data must be used when sizing a KVL valve:
• Refrigerant
• Evaporator capacity: Qe in [kW]
• Liquid temperature ahead of expansion valve: tl in [°C]
• Suction temperature ahead of compressor: ts in [°C]
• Maximum suction pressure after the regulator: PS in [bar]
• Connection type: flare or solder
• Connection size in [in.] or [mm]
The following example illustrates how this is done:
• Refrigerant: R404A
• Evaporating capacity: 4.0 kW
• Liquid temperature ahead of expansion valve: 35 °C
• Suction temperature ahead of compressor:
-25 °C
• Maximum suction pressure after the regulator:
3.8 bar ~ -7 °C
• Connectiontype: solder
• Connection size: 5⁄8 in.
Step 1
Determine the correction factor for liquid temperature tl ahead of expansion valve.
Correction factors for liquid temperature t
tl [°C] 10 15 20 25 30 35 40 45 50
R134a 0.88 0.92 0.96 1.0 1.05 1.10 1.16 1.23 1.31
R22 0.90 0.93 0.96 1.0 1.05 1.10 1.13 1.18 1.24
R404A/R507 0.84 0.89 0.94 1.0 1.07 1.16 1.26 1.40 1.57
R407C 0.88 0.91 0.95 1.0 1.05 1.11 1.18 1.26 1.35
l
From the correction factors table (see below) the correction factor for a liquid temperature at 35 °C (R404A) corresponds to a factor of 1.16.
Step 2
Corrected evaporator capacity is: Qe = 4.0 × 1.16 = 4.64 kW
Step 3
Now select the capacity table for R404A and choose the column with a suction temperature of -25 °C. Using the corrected replacement capacity, select a valve that provides an equivalent or greater
KVL 12 / KVL 15 / KVL 22 delivers a capacity of
4.6 kW at a pressure drop of 0.2 bar across
the valve and 5.6 kW at a pressure drop of 0.3 bar across the valve. Based on the required connection size of 5⁄8 in. the KVL 15 valve is the proper selction for this example.
capacity than required.
Step 4
KVL 15, 5⁄8 in. solder connection: code no. 034L0049, see ordering table.
© Danfoss | DCS (az) | 2018.03
DKRCC.PD.HH0.D8.02 | 7
Data sheet | Crankcase pressure regulator, type KVL
Design / Function KVL
1. Protective cap
2. Gasket
3. Setting screw
4. Main spring
5. Valve body
6. Equalization bellows
7. Valve plate
8. Valve seat
9. Damping device
The Crankcase pressure regulator type KVL opens at pressure fall on the outlet side, i.e. when the suction pressure ahead of the compressor drops below the set value.
The KVL only regulates based on the outlet pressure. Pressure variations on the inlet side of the regulator do not affect the degree of opening since the KVL is equipped with an equalization bellows (6). This bellows has an effective area corresponding to that of the valve seat.
The regulator is also equipped with an effective damping device (9) against pulsations, which normally occur in a refrigeration plant. The damping device helps to ensure long life of the regulator without impairing regulation accuracy.
© Danfoss | DCS (az) | 2018.03
DKRCC.PD.HH0.D8.02 | 8
Data sheet | Crankcase pressure regulator, type KVL
P-band and Offset Example with 4 bar setting
Capacity
Set point
[bar]
Min. setting point
P-band
Adjustment
range
Proportional band
The p-band is defined as the difference between the pressure at which the valve plate starts to open (set point) and the pressure at which the valve is completely open.
Example
If the valve is set to open at 4 bar and the valve p-band is 2 bar, the valve will give maximum capacity when the outlet pressure reaches 2 bar.
Offset
Offset
The offset is defined as the difference between the pressure at which the valve plate starts to open (set point) and the pressure at which the valve reaches the necessary opening for the actual load.
The offset is always a part of the p-band
Because optimal function of a refrigeration plant is best reached with fully open KVL, the term offset is normally not used in connection with the KVL valve.
Max. setting point
© Danfoss | DCS (az) | 2018.03
DKRCC.PD.HH0.D8.02 | 9
Danf already on order pro All trademarks in this material are property of the respec
Dimensions and weights
Danfoss
34L05.13
Type
Connection
Flare Solder ODF
H
H
1
2
1
B
C
solder
øD
Net
weight
[in.] [mm] [in.] [mm] [mm] [mm] [mm] [mm] [mm] [Kg]
KVL 12
KVL 15
1
2 12
5
8 16
KVL 22
1
2 12 179 99 64 10 30 0.4
5
8 16 179 99 64 12 30 0.4
7
8 22 179 99 64 17 30 0.4
KVL 28 1 1⁄8 28 259 151 105 20 43 1.0
3
KVL 35 1
8 35 259 151 105 25 43 1.0
oss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
vided that such alterations can be made without subsequential changes being necessary eady agreed.
© Danfoss | DCS (az) | 2018.03
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
DKRCC.PD.HH0.D8.02 | 10
Loading...