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