Danfoss Motorised valve, type MRV Data Sheet
Danfoss Motorised valve, type MRV is a compact, high-performance valve suitable for regulating pressure and temperature in HVAC&R applications. It features spring return, allowing the valve to close automatically in case of power failure. MRV can be used in dry and wet suction lines, hot gas lines, and liquid lines without phase change. With its balanced design, it operates with low opening and closing forces, making it ideal for systems where pressure drop across an open valve is critical.
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Refrigeration and Air Conditioning Controls
Technical leaflet
Motorised valve
Type MRV
R E F R I G E R A T I O N A N D A I R C O N D I T I O N I N G
Technical leaflet
Contents
Motorised valve, type MRV
Page
Introduction .................................................................................................................................. 3
Features ....................................................................................................................................... 3
Design ......................................................................................................................................... 4
Technical data ............................................................................................................................. 4
Function ....................................................................................................................................... 5
Application examples for MRV .................................................................................................... 6
Nominal capacity R 717 - Wet suction line ................................................................................. 7
Nominal capacity R 717 - Dry suction line (pump operation) ..................................................... 8
Nominal capacity R 717 - Dry suction line DX (dry expansion) ................................................. 9
Ordering ..................................................................................................................................... 10
Material specification ................................................................................................................. 11
Dimensions and weight ............................................................................................................. 13
2 RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet
Introduction
Motorised valve, type MRV
Features
Danfoss A/S (RC-CM / hbs), 08 - 2002
MRV motorised valve, complete with SMV/SMVE motor and spindle heater
Motor Regulating Valves (MRV) are direct operated motorised valves controlled by
SMV/SMVE motors.
MRV valves are used to regulate pressure and temperature in dry and wet suction lines, in hot gas lines and in liquid lines without phase change (i.e. where no expansion occurs in the valve).
automatically when no voltage is applied to the motor, e.g. in the event of power failure).
This function is incorporated in the SMV/
SMVE motor, but can be disconnected if it is not required.
MRV does not require differential pressure across the valve to be able to regulate. The valve is therefore ideal in systems where pressure drop across an open valve cannot be accepted.
MRV valves are designed so that the opening and closing forces are balanced, therefore the same size of SMV/SMVE motor can be used for the complete range of MRV's (from DN 5 to
DN 65). Consequently, MRV valves in combination with SMV/SMVE motors are compact motorised units of comparatively small dimensions.
MRV + SMV/SMVE are supplied as standard with spring return (i.e. the valve closes
The MRV valve is based on a PM valve body and has the same dimensions, connections and flanges.
The SMV motor controls the MRV valve by an ordinary three-point control (open-neutralclose) while the SMVE motor uses a signal
(4 - 20 mA).
Applicable to all common non-flammable refrigerants, including R 717, and noncorrosive gases/liquids dependent on sealing material compability
The valve can be used as a soft opening solenoid valve to prevent liquid hammer and pulsation
The valve and motor is supplied as standard with spring return (can be disconnected) so that the valve closes automatically when no voltage is applied to the SMV/SMVE motor
The valve has a pressure gauge connection for measuring valve inlet pressure
The valve can be operated manually using the SMV/SMVE motor manual operation facility
The valve has a built-in filter and a teflon sealing disc that ensures there is a tight seal across the valve port
The valve can be fitted with an AKS 45 electronic position indicator (available as an accessory)
A spindle heater is also available as an accessory, for use with media at te mperatures lower than 0°C
SMV/SMVE motors are supplied with motor heaters as standard
RD4AI202 3
Technical leaflet
Design
Technical data
4
Motorised valve, type MRV
MRV is designed as a balanced valve which is held closed by a built-in spring.
With counter-flow, the valve is only capable of closing tight against a differential pressure, less than the force of the return spring
(approx. 3 bar).
Valve cone
A logarithmic regulating cone provides optimum regulation accuracy.
Push pin seal assembly
Replaceable seal assembly in stainless steel with double sealing system.
Depending on the control signal requirement, an SMV or SMVE motor is fitted to open the valve by acting on the valve spindle push pin.
Valve sizes
MRV is available in sizes from:
MRV 5 (k v
: 1.6 m 3 /h) to MRV 65 (k v
: 72 m 3 /h)
Valve body incl. covers
Material: EN-GJS-400-18-LT
Installation
MRV + SMV/SMVE can be installed in vertical or horizontal pipelines (with motor upwards).
Pressure Equipment Directive (PED)
MRV valves are approved according to the
European standard specified in the Pressure
Equipment Directive and are CE marked.
For further details / restrictions - see
Installation Instruction.
Nom inal bore
Class ified for
Category
MRV valves
DN
≤
25 (1 in.) DN32-65 m m (1¼ - 2½ in.)
Fluid group I
Article 3, paragraph 3 II
Refrigerants
Applicable to all common non flammable refrigerants including R 717 and non corrosive gases/liquids dependent on sealing material compatibility.
Flammable hydrocarbons are not recommended. For further information please contact your local Danfoss sales company.
Temperature range:
Media: –50/+120°C (a spindle heater must be used for temperatures below 0°C).
Ambient: –20/+60°C.
Pressure
Max. permissible working pressure:
PB = 28 bar (406 psi)
Max. permissible test pressure:
P’= 42 bar (609 psi)
Valve size k v
-value C v
-value Max.
∆ p Max.
∆ p Min. opening/closing times Lifting m 3 /h USgal/min bar psi 50 Hz
Closing
60 Hz height, L 1 ) time 2 )
MRV 5
MRV 10
MRV 15
MRV 20
MRV 25
MRV 32
MRV 40
MRV 50
MRV 65
1.6
3.0
4.0
7.0
11.5
17.2
30.0
43.0
72.0
1.9
3.5
4.6
8.1
13.3
20.0
34.8
49.9
83.5
28
28
28
28
28
20
18
18
18
1) In a closed condition there will be a clearance of 0.6 mm
- 1.0 mm between the SMV/SMVE motor spindle and the
MRV valve push pin (27).
2) Closing time with spring return:
When an MRV is closed solely by the spring return system (because of current failure) the stated closing times can vary, slightly, due to various conditions including the viscosity of the medium.
406
406
406
406
406
290
261
261
261
SMV/SMVE motor spindle speed
Spindle speed at 50 Hz 3 s/mm
Spindle speed at 60 Hz 2.4 s/mm
33 s
33 s
33 s
33 s
33 s
40 s
50 s
62 s
63 s
26 s
26 s
26 s
26 s
26 s
32 s
40 s
49 s
51 s
10.0
10.0
10.0
10.0
10.0
12.3
15.5
19.5
20.5
8 s
8 s
8 s
8 s
8 s
10 s
13 s
16 s
17 s
RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet
Function
Motorised valve, type MRV
18 Cylinder liner
21 Regulating cone
26 Bottom plug
27 Push pin
30 Element for spindle heater
33 Pressure gauge connection
35 Balancing piston
39 Closing spring
MRV incorporates a balancing piston (35) that ensures the valve operates with low opening and closing forces. Therefore the differential pressure across the valve has minimal effect on the valve opreration.
Inlet pressure P
1
acting on the underside of the regulating cone (21) is led via internal channels in the valve body to the top of the balancing piston. The pressure on the underside of the regulating cone is thus equalised.
In the same way, outlet pressure P
2
, which acts on the top of the regulating cone, is led via an internal channel to the underside of the balancing piston.
The balancing piston operates in a cylinder liner (18) and is fitted with a sealing ring for tight sealing.
MRV is fitted with a spring (39) that closes the valve when the push pin (27) is not activated.
The SMV/SMVE motor is fitted with a return spring that forces the motor spindle closed when no voltage is being applied to the motor.
This means that the MRV valve closes automatically when, for example, the power fails. (This is a function of the SMV/SMVE motor, but can be disconnected, by using the angle bracket accessory).
An AKS 45 electronic position indicator can be fitted instead of the MRV bottom plug (26).
An output signal (4 - 20 mA)) of the exact position of the valve cone can be obtained during operation, together with digital on/off signals for fully open and fully closed valve.
A heating element can be fitted on the MRV valve neck to keep the pressure pin free of ice
(for use with media temperatures under 0°C).
MRV has a pressure gauge connection (33) for registering valve inlet pressure P
1
.
Danfoss A/S (RC-CM / hbs), 08 - 2002
RD4AI202 5
Technical leaflet
Application examples for MRV
Motorised valve, type MRV
MRV can be used for pressure and temperature regulation in dry and wet suction lines, in hot gas lines and in liquid lines without phase change
(i.e. where no expansion occurs in the valve).
Hot gas bypass or defrost line
Wet suction line
Dry suction line
Discharge line
Liquid line without phase change
Liquid line with phase change
6 RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet
Nominal capacity R 717
Wet suction line
Motorised valve, type MRV
Location of valve in system (marked with grey)
Hot gas bypass & defrost line
Highpressure line
Wet suction line
Dry suction line
MRV
Wet suction line
When sizing, multiply the evaporator capacity by the appropriate correction factor in order to obtain the nominal valve capacity; or divide the nominal valve capacity by the correction factor to obtain the evaporator capacity.
Correction factor for recirculation rate (f rec.
)
Recirculation rate
2.0
3.0
4.0
6.0
8.0
10.0
Correction factor
0.77
0.90
1.00
1.13
1.20
1.25
Correction factor for
∆
P (f
∆
P
∆
P (bar) Correction factor
)
0.01
2.24
0.03
0.05
0.08
0.10
0.14
1.29
1.00
0.79
0.71
0.60
Correction factor for recirculation rate (f rec.
)
Recirculation rate
2.0
3.0
4.0
6.0
8.0
10.0
Correction factor
0.77
0.90
1.00
1.13
1.20
1.25
Correction factor for
∆
P (f
∆
P
∆
P (psi) Correction factor
)
0.15
2.24
0.45
0.75
1.25
1.75
2.25
1.29
1.00
0.77
0.65
0.58
Liquid line without phase change Liquid line with or without phase change
Capacity table at nominel conditions (Q
N
[kW] ,
∆
P = 0.05 bar, recirculation rate = 4.0)
Type
MRV 5
MRV 10 k v m 3 /h
1.6
3.0
Evaporating temperatureT e
–50°C –40°C –30°C
1.5
1.9
2.4
2.7
3.5
4.4
–20°C –10°C
2.9
3.4
5.4
6.4
0°C
4.0
7.5
10°C
4.6
8.7
MRV 15
MRV 20
MRV 25
MRV 32
MRV 40
MRV 50
MRV 65
4.0
7.0
11.5
17.2
30.0
43.0
72.0
3.7
6.4
11
16
27
39
66
4.7
8.3
14
20
35
51
85
5.9
10
17
25
44
63
106
7.2
13
21
31
54
78
130
8.5
15
25
37
64
92
154
10
18
29
43
75
108
180
12
20
33
50
87
124
208
Calculation example
An application has the following operating conditions: T e
= –30°C
Q
0
= 36 kW
Recirculation rate = 3
Max.
∆
P = 0.03 bar
The capacity table is based on nominal conditions (recirculation rate = 4, pressure drop
∆
P = 0.05 bar). Using the appropriate correction factor, the actual capacity must be corrected in relation to the nominal capacity.
Correction factor for:
Recirculation rate 3 (f rec.
∆
P 0.03 bar (f
∆
P
) = 1.29
) = 0.90
Q
N
= Q
0
×
f rec.
×
f
∆
P
= 36
×
0.90
×
1.29 = 41.8 kW
From the capacity table MRV 40 is selected with
Q
N
capacity 44 kW.
Capacity table at nominal conditions (Q
N
[Tons of Refrigeration],
∆
P = 0.75 psi, recirculation rate = 4.0)
Type
MRV 5
MRV 10
MRV 15
MRV 20
MRV 25
MRV 32
MRV 40
C v
USgal/min –60°F *) –40°F
1.9
0.4
0.5
3.5
4.6
8.1
13.3
20.0
34.8
0.8
1.0
1.8
2.9
4.4
7.6
MRV 50 49.9
11
MRV 65 83.5
18
*) 2°F under min. operating temperature
1.0
1.4
2.4
3.9
5.8
10
15
24
Evaporating temperature T e
–20°F
0.7
0°F
0.9
20°F
1.0
40°F
1.2
1.3
1.7
3.1
5.0
1.6
2.2
3.8
6.2
2.0
2.6
4.6
7.5
2.3
3.1
5.4
8.8
7.5
13
19
31
9.3
16
23
39
11
20
28
47
13
23
33
55
60°F
1.4
2.7
3.6
6.2
10
15
27
38
64
80°F
1.6
3.1
4.1
7.1
12
18
31
44
73
20°C
5.2
10
13
23
38
56
98
141
236
Calculation example
An application has the following operating conditions: T e
= –20°F
Q
0
= 26 TR
Recirculation rate = 3
Max.
∆
P = 0.45 psi.
The capacity table is based on nominal conditions (recirculation rate = 4, pressure drop
∆
P = 0.75 psi). Therefore, using the appropriate correction factor, the actual capacity must be corrected in relation to the nominal capacity.
Correction factor for:
Recirculation rate 3 (f rec.
) = 0.90
∆
P 0.45 psi (f
∆
P
) = 1.29
Q
N
= Q
0
×
f rec
×
f
∆
P
= 26
×
0.90
×
1.29 = 30.2 TR
From the capacity table MRV 65 is selected with
Q
N
capacity 31 TR.
Danfoss A/S (RC-CM / hbs), 08 - 2002
RD4AI202 7
Technical leaflet
Nominal capacity R 717
Dry suction line
(pump operation)
Motorised valve, type MRV
Location of valve in system (marked with grey)
Hot gas bypass & defrost line
Highpressure line
Wet suction line
Dry suction line
MRV
Dry suction line
(pump operation)
When sizing, multiply the evaporator capacity by the appropriate correction factor in order to obtain the nominal valve capacity; or divide the nominal valve capacity by the correction factor to obtain the evaporator capacity.
Correction factor for liquid temperature (T liq.
)
Liquid
temperature
–20°C
–10°C
0°C
10°C
20°C
30°C
40°C
50°C
Correction factor
0.82
0.86
0.88
0.92
0.96
1.00
1.04
1.09
Correction factor for
∆
P (f
∆
P
∆
P (bar) Correction factor
)
0.01
2.24
0.03
0.05
0.08
0.10
0.14
1.29
1.00
0.79
0.71
0.60
Correction factor for liquid temperature (T liq.
)
Liquide temperature
–10°F
10°F
30°F
50°F
70°F
90°F
110°F
130°F
Correction factor
0.82
0.85
0.88
0.92
0.96
1.00
1.04
1.09
Correction factor for
∆
P (f
∆
P
∆
P (psi) Correction factor
)
0.15
2.24
0.45
0.75
1.25
1.75
2.25
1.29
1.00
0.77
0.65
0.58
8
Liquid line without phase change Liquid line with or without phase change
Capacity table for nominal conditions (Q
N
[kW],
∆
P = 0.05 bar, T liq.
= 30°C)
Type
MRV 5
MRV 10
MRV 15
MRV 20
MRV 25
MRV 32
MRV 40
MRV 50
MRV 65 k v m 3 /h
1.6
3.0
4.0
7.0
11.5
17.2
30.0
43.0
72.0
Evaporating temperature T e
–50°C –40°C –30°C
2.1
2.7
3.5
–20°C
4.4
–10°C
5.4
0°C
6.6
3.9
5.2
9.0
15
5.1
6.8
12
20
6.5
8.7
15
25
8.2
11
19
32
10
14
24
39
12
16
29
47
22
39
55
93
29
51
73
122
38
65
94
157
47
82
118
197
58
101
145
243
70
123
176
295
Calculation example
An application has the following operating conditions: T e
= –20°C
Q
0
= 98 kW
T liq.
= 10°C
Max.
∆
P = 0.03 bar
The capacity table is based on nominal conditions (T liq.
= 30°C, pressure drop
∆
P =
0.05 bar). Using the appropriate correction factor, the actual capacity must be corrected in relation to the nominal capacity.
Correction factors for:
∆
T
Q
P 0.03 bar [f liq
N
. 10°C [f
= Q with Q
N
0
T liq
× f
∆
P
∆
P
] = 1.29
.] = 0.92
× f
T liq.
= 98
×
1.29
×
0.92 = 116 kW
From the capacity table MRV 50 is selected
capacity 118 kW.
Capacity table for nominal conditions (Q
N
) [Tons of Refrigeration],
∆
P = 0.75 psi, T liq.
= 90°F)
Type
MRV 5
MRV 10
MRV 15
MRV 20
C v
USgal/min –60°F *) –40°F
1.9
0.6
0.8
3.5
4.6
8.1
1.1
1.4
2.5
1.5
1.9
3.4
MRV 25
MRV 32
MRV 40
13.3
20.0
34.8
4.1
6.1
11
MRV 50 49.9
15
MRV 65 83.5
26
*) 2°F under min. operating temperature
5.6
8.4
15
21
35
Evaporating temperature T e
–20°F
1.0
0°F
1.3
20°F
1.7
40°F
2.0
1.9
2.6
4.5
7.4
11
19
27
46
2.5
3.3
5.8
9.4
14
25
35
59
3.1
4.1
7.3
12
18
31
45
75
3.8
5.1
8.9
15
22
38
55
92
18
26
46
66
111
60°F
2.5
4.6
6.2
11
80°F
2.9
5.5
7.3
13
21
32
55
79
132
Calculation example
An application has the following operating conditions: T e
= 0°F
Q
0
= 20 TR
Max.
∆
P = 0.45 psi
T liq.
= 50°F
T s
= 20°F
The capacity table is based on nomial conditions (T liq.
= 90°F, pressure drop
∆
P =
0.75 psi).
Using the appropriate correction factors, the actual capacity must be corrected in relation to the nominal capacity.
Correction factors for:
∆
P 0.45 psi (f
∆
P
) = 1.29
T liq.
50°F (f
Tliq
.) = 0.92
Q
N
= Q
0
×
f
∆
P
×
f
Tliq.
= 20 × 1.29 × 0.92 = 23.7 TR
From the capacity table MRV 40 is selected with Q
N
capacity 25 TR.
10°C
7.8
15
20
34
56
84
147
210
352
20°C
9.3
17
23
41
67
100
174
249
417
RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet
Nominal capacity R 717
Dry suction line
DX (dry expansion)
Motorised valve, type MRV
Location of valve in system (marked with grey)
Hot gas bypass & defrost line
Dry suction line
DX (dry expansion)
Dry suction line MRV
Highpressure line
When sizing, multiply the evaporator capacity by the appropriate correction factor in order to obtain the nominal valve capacity; or divide the nominal valve capacity by the correction factor to obtain the evaporator capacity.
Correction factor liquid temperature (T liq.
)
Liquid temperature
Correction factor
–20°C
–10°C
0°C
10°C
20°C
30°C
0.82
0.86
0.88
0.92
0.96
1.00
40°C 1.04
50°C 1.09
Correction factor for
∆
P (f
∆
P
∆
P (bar) Correction factor
)
0.01
2.24
0.03
0.05
0.08
0.10
0.14
1.29
1.00
0.79
0.71
0.60
Correction factor for superheat (T s
)
Superheat Correction factor
6 K
8 K
10 K
12 K
1.00
1.00
1.00
1.00
Correction factor liquid temperature (T liq.
)
Liquide temperature
–10°F
10°F
30°F
50°F
70°F
90°F
Correction factor
0.82
0.85
0.88
0.92
0.96
1.00
110°F 1.04
130°F 1.09
Correction factor for
∆
P (f
∆
P
∆
P (psi)
)
Correction factor
0.15
2.24
0.45
0.75
1.25
1.75
2.25
1.29
1.00
0.77
0.65
0.58
Correction factor for superheat (T s
)
Superheat Correction factor
10°F 1.00
14°F
18°F
20°F
1.00
1.00
1.00
Danfoss A/S (RC-CM / hbs), 08 - 2002
Liquid line with/without phase change
Capacity table for nominal conditions (Q
N
[kW],
∆
P = 0.05 bar, T liq.
= 30°C, T s
= 8 K)
Type
MRV 5
MRV 10
MRV 15
MRV 20
MRV 25
MRV 32
MRV 40
MRV 50
MRV 65 k v m 3 /h
1.6
3.0
4.0
7.0
11.5
17.2
30.0
43.0
72.0
Evaporating temperatureT e
–50°C –40°C –30°C
2.1
2.7
3.5
–20°C
4.4
–10°C
5.4
0°C
6.5
3.9
5.1
9.0
15
5.1
6.8
12
19
6.5
8.7
15
25
8.2
11
19
31
10
13
24
39
12
16
29
47
22
39
55
93
29
51
73
122
37
65
93
156
47
82
117
196
58
101
145
242
70
123
176
294
10°C
7.8
15
20
34
56
84
146
210
352
Calculation example
An application has the following operating conditions: T e
= –30°C
Q
0
= 42 kW
Max.
∆
P = 0.08 bar
T liq.
= 40°C
T s
= 12 K
The capacity table is based on nominal conditions(T liq.
= 30°C, pressure drop
∆
P = 0.05
bar, superheat T s
= 8 K). Using the appropriate correction factor, the actual capacity must be corrected in relation to the nominal capacity
Correction factor for:
∆
P 0.08 bar f
∆
P
= 0.79
T liq.
40°C f
Tliq.
= 1.04
T s
Q
12 K f
N
= Q
0
Ts
= 1.00
×
f
∆
P
×
f
Tliq.
×
f
Ts
= 42
×
0.79
×
1.04
×
1.00 = 34.5 kW
From the capacity table MRV 32 is selected with
Q
N
capacity 37 kW.
Capacity table for nominal conditions (Q
N
[Tons of Refrigeration],
∆
P = 0.75 psi, T liq.
= 90°F, T s
= 20°F)
Type
MRV 5
MRV 10
MRV 15
MRV 20
MRV 25
MRV 32
C v
USgal/min –60°F *) –40°F
1.9
3.5
4.6
8.1
13.3
20.0
0.6
1.1
1.4
2.5
4.1
6.1
MRV 40
MRV 50
MRV 65
34.8
49.9
83.5
11
15
25
*) 2°F under min. operating temperature
0.8
1.5
1.9
3.4
5.6
8.4
15
21
35
Evaporating temperatureT e
–20°F 0°F 20°F 40°F
1.0
1.9
2.6
1.3
2.5
3.3
1.6
3.1
4.1
2.0
3.8
5.1
4.5
7.4
11
19
27
46
5.8
9
14
25
35
59
7.2
12
18
31
44
74
8.9
15
22
38
54
91
60°F
2.5
4.6
6.1
11
18
26
46
66
110
80°F
2.9
5.5
7.3
13
21
31
55
78
131
20°C
9.2
17
23
40
66
99
173
247
414
Calculation example
An application has the following operating conditions: T e
= –20 ° F
Q
0
= 25 TR
Max.
∆
P = 0.45 psi
T liq.
= 130 o F
T s
= 20 o F
The capacity table is based on nominal conditions (T liq.
= 90 ° F, pressure drop
∆
P =
0.75 psi, superheat T s
= 20 ° F). Using the appropriate correction factor, the actual capacity must be corrected in relation to the nominal capacity
∆
P 0.45 psi (f
∆
P
) = 1.29
T liq.
50 o F (f
Tliq
.) = 0.92
T s
20 ° F (f
Ts
) = 1.00
Q
N
= Q
0
×
f
∆
P
×
f
Tliq.
×
f
Ts
= 25
×
1.29
×
0.92
×
1.00 = 29.7 TR
From the capacity table MRV 65 is selected with
Q
N
capacity 46 TR .
RD4AI202 9
Technical leaflet Motorised valve, type MRV
Ordering
1) Code no. applies to flange set consisting of one inlet and one outlet flange.
2) Dimensioned sketch, see spare parts catalogue.
Motorised valve
Valve size
MRV 5
MRV 10
MRV 15
MRV 20
MRV 25
MRV 32
MRV 40
MRV 50
MRV 65 k v value
1.60
3.00
4.00
7.00
11.50
17.20
30.00
43.00
72.00
Code no.
027F3080
027F3081
027F3082
027F3083
027F3084
027F3085
027F3086
027F3087
027F3088
Spindle heater
A heating element can be fitted around the
MRV push pin seal assembly to keep the push pin free of ice. The element is described in more detail on the SMV/SMVE motor datasheet.
Code numbers include:
MRV motorised valve, flange gaskets and flange bolts.
SMV/SMVE motor, flanges and spindle heater are ordered seperately.
Flange set
Weld flange Solder flange
Valve size Flange type
MRV 5 - 25
MRV 32
MRV 40
MRV 50
MRV 65
3
10
11
12
13 in.
3 /
1
4
1 1 /
4
1 1 /
4
1 1 /
2
1 1 /
2
2
2
2 1 /
2
2 1 /
2
3
Code. no.
027N1220
027N1225
027N1230
027N2332
027N2340
027N2440
027N2450
027N2550
027N2565
027N2665
027N2680 in.
7 /
1 1 /
8
8
1 3 /
8
1 5 /
8
2 1 /
8
2 5 /
8
Code no.
027L1223
027L1229
027L2335
027L2441
027L2554
027L2666 mm
22
28
35
42
54
76
Code no.
027L1222
027L1228
027L2335
027L2442
027L2554
027L2676
Stainless steel: flanges, flange bolts and bolts for top and bottom covers, see spare parts list for ordering.
Accessories
Description
Pressure gauge connection, Ø 6.5/Ø 10 mm weld/solder
Pressure gauge connection, ¼ in. flare (self-sealing).
Must not be used in systems with ammonia.
Pressure gauge connection, self-cutting connection
Pressure gauge connection
Electronic position indicator, AKS 45
6 mm
10 mm
1 /
4
NPT
Code no.
027B2035
027B2041
027B2063
027B2064
027B2062
084H4045
10 RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet
Material specification
Motorised valve, type MRV
Push pin seal assembly
No.
Part
1 Nut
2 Dirt seal
3 Bush
4 Seal
5 O-ring
6 O-ring
7 Insert
12 Locking screw
13 Nipple
14 Gasket
15 Top cover
16 Gasket
17 O-ring
18 Cylinder liner
19 Spindle
20 Valve body
21 Regulating cone
22 Gasket
23 Bottom cover
MRV 65 only
Material
Stainless steel
DIN/EN
X8CrNiS 18-9 14440
EN 10088 W. no. 1.4305
PTFE (Teflon)
Stainless steel X8CrNiS 18-9 14440
EN 10088 W. no. 1.4305
PTFE (Teflon)
Cloroprene (Neoprene)
Cloroprene (Neoprene)
Stainless steel X8CrNiS 18-9 14440
EN 10088 W. no. 1.4305
ISO
683/13 type 17
683/13 type 17
683/13 type 17
Steel
Stainless steel
X5CrNi 18-9 W. no. 1.4301
683/13
X8CrNiS 18-9 14440
EN 10088 W. no. 1.4305
683/13 type 17
Aluminium
Low temperature,
EN-GJS-400-18-LT cast iron (spherical)
EN 1563
Asbestos-free
Cloroprene (Neoprene)
Cast iron GG-20 1691
W. no. 0.6020
Steel 9S Mn Pb 28, 1651
W. no. 1.0716
Low temperature,
EN-GJS-400-18-LT cast iron (spherical)
EN 1563
Steel 9S Mn Pb 28, 1651
W. no. 1.0716
Asbestos-free
Low temperature,
EN-GJS-400-18-LT cast iron (spherical)
EN 1563
1085, class 200
Type 2, R 683/9
Type 2, R 683/9
ASTM
AISI 303
AISI 303
AISI 303
AISI 316
AISI 303
1213, SAE J 403
1213, SAE J 403
Danfoss A/S (RC-CM / hbs), 08 - 2002
RD4AI202 11
Technical leaflet Motorised valve, type MRV
Material specification (continued)
Push pin seal assembly
MRV 65 only
12
No.
Part
24 Bolt
25 Gasket
26 Bottom plug
27 Push pin
28 Distance piece
(MRV 5 - 25 only)
29 Adjusting screw
30 Heating element housing
31 Locking screw
32 Gasket
33 Blanking plug
34 Nut
35 Balancing piston
36 Piston seal
37 O-ring
38 O-ring
39 Spring
41 Sealing disc
42 Valve plate
43 Nut
44 Filter
45 Nipple
(MRV 65 only)
46 Blanking plug
Material
Stainless steel
Asbestos-free
Steel
DIN/EN
A2-70
ISO
A2-70
ASTM
Type 308
Stainless steel
Stainless steel
Stainless steel
9S Mn Pb 28, 1651
W. nr. 1.0716
X8CrNiS 18-9 14440
EN 10088 W. nr. 1.4305
X8CrNiS 18-9 14440
EN 10088 W. nr. 1.4305
X8CrNiS 18-9 14440
EN 10088 W. nr. 1.4305
Type 2, R 683/9
683/13 type 17
683/13 type 17
683/13 type 17
1725 W. nr. 3.3206
X5CrNi 18-9 W. no. 1.4301
683/13
1213, SAE J 403
AISI 303
AISI 303
AISI 303
AISI 316
Aluminium
Steel
Aluminium
Steel 9S Mn Pb 28, 1651
W. nr. 1.0716
Steel
Cast iron GG-20 1691
W. nr. 0.6020
PTFE (Teflon)
Cloroprene (Neoprene)
Cloroprene (Neoprene)
Steel
PTFE (Teflon)
Steel 9S Mn Pb 28, 1651
W. nr. 1.0716
Steel
Stainless steel
Stainless steel
Steel
X8CrNiS 18-9 14440
EN 10088 W. nr. 1.4305
9S Mn Pb 28, 1651
W. nr. 1.0716
Type 2, R 683/9
185, class 20
Type 2, R 683/9
683/13 type 17
Type 2, R 683/9
1213, SAE J 403
1213, SAE J 403
AISI 303
1213, SAE J 403
RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet
Dimensions and weight
Motorised valve, type MRV
A/F 2.5
A/F 32
Danfoss A/S (RC-CM / hbs), 08 - 2002
Dimensions
Valve size
MRV 5 - 25 ( 7 /
32
- 1 in.)
MRV 32 (1 1 /
4
in.)
MRV 40 (1 1 /
2
in.)
MRV 50 (2 in.)
MRV 65 (2 1 /
2
in.)
H
1
H
2
H
3
H
4
L L
1
B
1
B
2
B
3 mm in.
mm in.
mm in.
mm in.
mm in.
66 105 79 266 177 106 75 Oval 87
2.60
4.13
3.11
10.47
6.97
4.17
2.95
flange 3.43
72 121 96 282 240 170 84 82 94
2.83
4.76
3.78
11.10
9.45
6.69
3.31
3.23
3.70
79 128 105 289 254 170 94 89 102
3.11
5.04
4.13
11.38
10.00
6.69
3.70
3.50
4.02
95 151 123 312 288 200 104 106 113
3.74
5.94
4.84
12.28
11.34
7.87
4.09
4.17
4.45
109 167 146 352 342 250 127 113 135
4.29
6.57
5.75
13.86
13.46
9.84
5.00
4.45
5.31
Weight
Valve size
MRV 5 - 25 ( 7 /
32
- 1 in.)
MRV 32 (1 1 /
4
in.)
MRV 40 (1 1 /
2
in.)
MRV 50 (2 in.)
Valve Motor without motor and flanges
5.8 kg (12.8 lb)
10 kg (22.0 lb)
12 kg (26.5 lb)
17 kg (37.5 lb)
MRV 65 (2 1 /
2
in.) 25 kg (55.1 lb)
Specified weights are approximately values only.
2.0 kg (4.4 lb)
2.0 kg (4.4 lb)
2.0 kg (4.4 lb)
2.0 kg (4.4 lb)
2.0 kg (4.4 lb)
Flange set
1.1 kg (2.4 lb)
1.5 kg (3.3 lb)
1.9 kg (4.2. lb)
2.8 kg (6.2. lb)
3.3 kg (7.3 lb)
RD4AI202 13
Technical leaflet Motorised valve, type MRV
14 RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
Technical leaflet Motorised valve, type MRV
Danfoss A/S (RC-CM / hbs), 08 - 2002
RD4AI202 15
Technical leaflet Motorised valve, type MRV
16 RD4AI202
Danfoss A/S (RC-CM / hbs), 08 - 2002
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