Danfoss Electronics KVP Data Sheet

Data sheet

Evaporator pressure regulator
Type KVP

The KVP is mounted in the suction line after the
evaporator and is used to:

1. Maintain a constant evaporating pressure and
thereby a constant surface temperature on the
evaporator. The regulation is modulating.
By throttling in the suction line, the amount of
refrigerant gas is matched to the evaporator
load.

2. Protect against an evaporating pressure that is
too low (e.g. as protection against freezing in
a water chiller). The regulator closes when the
pressure in the evaporator falls below the set
value.

3. Differentiate between the evaporating
pressures in two or more evaporators in
systems with one compressor.

Features • Accurate, adjustable pressure regulation

• Wide capacity and operating range

• Pulsation damping design

• Stainless steel bellows

• Compact angle design for easy installation in
any position

• “Hermetic” brazed construction

• 1⁄4 in. Schrader valve for pressure testing

• Available with flare and ODF solder
connections

• KVP 12 – KVL 22: may be used in the following
EX range: Category 3 (Zone 2)

© Danfoss | DCS (az) | 2018.03

DKRCC.PD.HA0.D8.02 | 1

Data sheet | Evaporator pressure regulator, type KVP

Approvals

Technical data

UL LISTED, file SA7200

R22, R1270*, R134a, R290*, R404A, R407A, R407C, R407F, R448A, R4 49A,

Refrigerants

Regulating range

Maximum working pressure PS/MWP PS = 18 bar

Maximum test pressure Pe = PS × 1.1 = 19.8 bar

Medium temperature range -45 – 130 °C

Maximum P-band

Kv-value 1) with offset 0.6 bar

Kv-value 1) 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 (KVP 12 – KVP 22) is evaluated for
R290, R600, R600a and R1270 by ignition source
assessment in accordance with standard
EN13463 -1.

R450A, R452A, R507A, R513A, R600*, R600a*
* KVP 12 – KVP 22 only

0 – 5.5 bar

Factory setting = 2 bar

KVP 12 – 22: 1.7 bar

KVP 28 – 35: 2.8 bar

KVP 12 – 22: 1.7 m3 / h

KVP 28 – 35: 2.8 m3 / h

KVP 12 – 22: 2.5 m3 / h

KVP 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

REACH requirements

Rated capacity 1)

Type

KVP 12

KVP 15 4.0 2.8 3.6 3.7

KVP 22 4.0 2.8 3.6 3.7 – – –

KVP 28

KVP 35 8.6 6.1 7.7 7.9 – – – 1 3⁄8 35 034L0032

1

) Rated capacity is the regulator capacity at
evaporating temperature te = -10 °C
condensing temperature tc = 25 °C
pressure drop in regulator Δp = 0.2 bar
offset = 0.6 bar
To select the product for other conditions or refrigerants, use Danfoss Coolselector®2.

2

) KVP 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

4.0 2.8 3.6 3.7

4.0 2.8 3.6 3.7 – – – – 12 034L0028

8.6 6.1 7.7 7.9 – – – 1 1⁄8 – 034L0026

8.6 6.1 7.7 7.9 – – – – 28 034L0031

[kW]

R404A/

R407C [in] [mm] [in] [mm]

R507

Flare

connection 2)

1

⁄2 12 034L0021

5

⁄8 16 034L0022

Code no.

Solder

connection

1

⁄2 – 034L0023

5

⁄8 16 034L0029

7

⁄8 22 034L0025

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.

Note:

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.

© Danfoss | DCS (az) | 2018.03

DKRCC.PD.HA0.D8.02 | 2

Data sheet | Evaporator pressure regulator, type KVP

Capacity

Regulator capacity Qe 1) [kW] with offset = 0.6 bar

Pressure drop

Type

KVP 12
KVP 15
KVP 22

KVP 28
KVP 35

in regulator

∆p

[bar] -30 -25 -20 -15 -10 -5 0 5

0.1 1.9 2.1 2.3 2.6 2.9 3.2 3.5 3.8

0.2 2.5 2.9 3.2 3.6 4.0 4.4 4.9 5.3

0.3 3.0 3.4 3.8 4.3 4.8 5.3 5.9 6.5

0.4 3.3 3.8 4.3 4.9 5.5 6.1 6.7 7.4

0.5 3.4 4.1 4.7 5.3 6.0 6.7 7.4 8.2

0.6 3.6 4.2 5.0 5.7 6.4 7.2 8.0 8.8

0.1 4.0 4.5 5.0 5.6 6.2 6.8 7.5 8.2

0.2 5.4 6.2 6.9 7.7 8.6 9.5 10.4 11.4

0.3 6.3 7.3 8.2 9.3 10.3 11.5 12.6 13.9

0.4 7.0 8.1 9.2 10.4 11.7 13.0 14.4 15.8

0.5 7.4 8.7 10.0 11.4 12.8 14.3 15.9 17.5

0.6 7.6 9.1 10.6 12.2 13.8 15.4 17.1 18.9

Regulator capacity Qe 1) [kW] with offset = 0.6 bar

Pressure drop

Type

KVP 12
KVP 15
KVP 22

KVP 28
KVP 35

1

) The capacities are based on
liquid temperature ahead of expansion valve tl = 25 °C
regulator offset = 0.6 bar
Dry saturated gas ahead of regulator

in regulator

∆p

[bar] -15 -10 -5 0 5 10 15 20

0.1 1.8 2.1 2.3 2.6 2.9 3.2 3.6 3.9

0.2 2.5 2.8 3.2 3.6 4.0 4.5 5.0 5.5

0.3 2.9 3.4 3.8 4.3 4.9 5.4 6.0 6.6

0.4 3.2 3.7 4.3 4.9 5.5 6.1 6.8 7.6

0.5 3.4 4.0 4.6 5.3 6.0 6.8 7.5 8.3

0.6 3.5 4.2 4.9 5.7 6.4 7.3 8.1 9.0

0.1 3.9 4.5 5.0 5.6 6.2 6.9 7.6 8.4

0.2 5.3 6.1 6.9 7.8 8.7 9.6 10.6 11.7

0.3 6.3 7.2 8.2 9.3 10.4 11.6 12.9 14.2

0.4 6.9 8.0 9.2 10.5 11.8 13.2 14.6 16.2

0.5 7.3 8.6 10.0 11.4 12.9 14.5 16.1 17.9

0.6 7.5 9.0 10.5 12.1 13.8 15.6 17.4 19.3

Evaporating temperature t

[°C]

Evaporating temperature te [°C]

R22

e

R134 a

© Danfoss | DCS (az) | 2018.03

Correction factors for liquid temperature t

t

l

[°C]

R22 0.93 0.96 1.0 1.04 1.08 1.13

R134a 0.92 0.96 1.0 1.05 1.10 1.16

15 20 25 30 35 40

l

Correction factors for offset

Offset

[bar]

KVP 12
KVP 15
KVP 22

KVP 28
KVP 35

0.2 0.4 0.6 0.8 1.0 1.2 1.4

2.5 1.4 1.0 0.77 0.67 0.59 –

2.5 1.4 1.0 0.77 0.67 0.59 –

2.5 1.4 1.0 0.77 0.67 0.59 –

– 1.4 1.0 0.77 0.67 0.59 0.53

– 1.4 1.0 0.77 0.67 0.59 0.53

DKRCC.PD.HA0.D8.02 | 3