范文一:丹佛斯膨胀阀
制冷剂
阀型号
压力
平衡方1)
毛细管
接口尺寸
产品代码
进口×出口
N系列
-40至+10℃
N系列
-40至-5℃
NL系列
-40至-15℃
NL系列
-60至-25℃
m
in.×in.
mm×mm
不带mop
带mop
带mop
带mop
不带mop
带mop
R22
TX 2
内平衡式
1.5
3/8*1/2
10*12
068Z3206
068Z3208
068Z3224
068Z3226
068Z3207
068Z3228
TEX 2
外平衡式
1.5
3/8*1/2
10*12
068Z3209
068Z3211
068Z3225
068Z3227
068Z3210
068Z3229
R134a
TN 2
内平衡式
1.5
3/8*1/2
10*12
068Z3346
068Z3347
068Z3393
068Z3369
TEN 2
外平衡式
1.5
3/8*1/2
10*12
068Z3348
068Z3349
068Z3392
068Z3370
R404A
/R507
TS 2
内平衡式
1.5
3/8*1/2
10*12
068Z3400
068Z3402
068Z3406
068Z3408
068Z3401
068Z3410
TES 2
外平衡式
1.5
3/8*1/2
10*12
068Z3403
068Z3405
068Z3407
068Z3409
068Z3404
068Z3411
R12
TF 2
内平衡式
1.5
3/8*1/2
10*12
068Z3202
068Z3236
068Z3220
068Z3222
TEF 2
外平衡式
1.5
3/8*1/2
10*12
068Z3204
068Z3237
068Z3221
068Z3223
R502
TY 2
内平衡式
1.5
3/8*1/2
10*12
068Z3212
068Z3214
068Z3230
068Z3232
068Z3213
068Z3234
TEY 2
外平衡式
1.5
3/8*1/2
10*12
068Z3215
068Z3217
068Z3231
068Z3233
068Z3216
068Z3235
N系列:-40℃至+10℃
流口编号
名义制冷量,单位:冷吨(TR)
名义制冷量,单位:KW
产品代码
R22
R134a
R404A
R507
R12
R502
R22
R134a
R404A
R507
R12
R502
0X
0.15
0.11
0.11
0.5
0.4
0.38
068-2002
00
0.3
0.25
0.21
0.2
0.2
1.0
0.9
0.7
0.7
0.7
068-2003
01
0.7
0.5
0.45
0.3
0.3
2.5
1.8
1.6
1.0
1.0
068-2010
02
1.0
0.8
0.6
0.5
0.5
3.5
2.6
2.1
1.7
2.1
068-2015
03
1.5
1.3
1.2
1.0
1.0
5.2
4.6
4.2
3.5
3.5
068-2006
04
2.3
1.9
1.7
1.5
1.5
8.0
6.7
6.0
5.2
5.2
068-2007
05
3.0
2.5
2.2
2.0
2.0
10.5
8.6
7.7
7.0
7.0
068-2008
06
4.5
3.0
2.6
3.0
3.0
15.5
10.5
9.1
10.5
10.5
068-2009
B系列:-60℃至-25℃
0X
0.15
0.11
0.5
0.38
068-2002
00
0.2
0.21
0.2
0.7
0.7
0.7
068-2003
01
0.3
0.45
0.3
1.0
1.6
1.0
068-2010
02
0.6
0.6
0.5
2.1
2.1
1.7
068-2015
03
0.8
1.0
0.8
2.8
3.5
2.8
068-2006
04
1.2
1.4
1.2
4.2
4.9
4.2
068-2007
05
1.5
1.7
1.5
5.2
6.0
5.2
068-2008
06
2.0
1.9
2.0
7.0
6.6
10.5
068-2009
丹佛斯膨胀阀
连接的铜管外径尺寸
缩径连接的铜管外径尺寸
产品代码
in.
mm
in.
mm
1/4
6
011L1101
3/8
10
011L1135
1/2
12
011L1103
1/4
6
011L1107
热力感温元件
阀型号
压力平衡方式
毛细管
产品代码
N系列
-40至+10℃
B系列
-60至-25℃
1/4in.6mm
m
不带MOP
带MOP
不带MOP
带MOP
TEX? 5
外平衡式1)
3
067B3250
067B3267
067B3263
067B3251
TEX? 12
外平衡式2)
3
067B3210
067B3227
067B3211
TEX? 12
外平衡式2)
5
067B3209
067B3212
TEX? 20
外平衡式2)
3
067B3274
067B3286
067B3276
TEX? 20
外平衡式2)
5
067B3290
067B3287
TEX? 55
外平衡式2)
3
067G3205
067G3220
067G3207
TEX? 55
外平衡式2)
5
067G3209
067G3217
流口组件
阀型号
名义制冷量N系列
-40至10 ℃ KW
名义制冷量B系列
-60/55至-25 ℃ KW
流口编号
产品代码
TEX? 5-3
19.7
11.9
01
067B2089
TEX? 5-4.5
26.9
16.7
02
067B2090
TEX? 5-7.5
38.8
24.8
03
067B2091
TEX? 5-12
55.3
35.4
04
067B2092
TEX? 12-4.5
26.8
17.2
01
067B2005
TEX? 12-7.5
43.4
28.2
02
067B2006
TEX? 12-12
64.0
41.4
03
067B2007
TEX? 12-18
84.4
55.9
04
067B2008
TEX? 20-30
108.0
70.0
01
067B2172
TEX? 55-50
239.0
148.0
01
067G2005
TEX? 55-85
356.0
228.0
02
067G2006
热力感温元件
阀型号
压力平衡方式
毛细管
产品代码
N系列
-40至+10℃
NM系列
-40至-5℃
1/4in.6mm
m
不带MOP
带MOP
带MOP
TEX? 5
外平衡式1)
3
067B3297
067B3298
067B3360
TEX? 12
外平衡式2)
3
067B3232
067B3233
TEX? 12
外平衡式2)
5
067B3363
TEX? 20
外平衡式2)
3
067B3292
067B3293
TEX? 20
外平衡式2)
5
067B3370
TEX? 55
外平衡式2)
3
067G3222
067G3223
TEX? 55
外平衡式2)
5
067G3230
流口组件
阀型号
名义制冷量N系列
KW
流口编号
产品代码
TEX? 5-3.7
12.9
01
067B2089
TEX? 5-5.4
19.1
02
067B2090
TEX? 5-8.3
29.1
03
067B2091
TEX? 5-11.2
39.6
04
067B2092
TEX? 12-4.7
16.7
01
067B2005
TEX? 12-7.7
27.2
02
067B2006
TEX? 12-11.4
40.0
03
067B2007
TEX? 12-15
53.0
04
067B2008
TEX? 20-18
65.0
01
067B2170
TEX? 55-41
145.0
01
067G2001
TEX? 55-62
220.0
02
067G2002
热力感温元件
阀型号
压力平衡方式
毛细管
产品代码
N系列
-40至+10℃
B系列
-60至-25℃
1/4in.6mm
m
不带MOP
带MOP
不带MOP
带MOP
TEX? 5
外平衡式1)
3
067B3342
067B3344
067B3343
TEX? 12
外平衡式2)
3
067B3347
067B3349
TEX? 12
外平衡式2)
5
067B3346
067B3350
TEX? 20
外平衡式2)
3
067B3352
067B3354
TEX? 20
外平衡式2)
5
067B3356
067B3355
TEX? 55
外平衡式2)
3
067G3302
067G3305
TEX ?55
外平衡式2)
5
067G3301
067G3306
流口组件
阀型号
名义制冷量N系列
-40至10 ℃ KW
名义制冷量B系列
-60/55至-25 ℃ KW
流口编号
产品代码
TEX? 5-3.7
13.0
8.0
01
067B2089
TEX? 5-5.0
17.6
11.2
02
067B2090
TEX? 5-7.2
25.3
16.6
03
067B2091
TEX? 5-10.3
36.2
23.7
04
067B2092
TEX? 12-4.2
14.8
11.6
01
067B2005
TEX? 12-6.8
23.9
18.9
02
067B2006
TEX? 12-10.0
35.2
27.7
03
067B2007
TEX? 12-13.4
47.1
37.5
04
067B2008
TEX? 20-16.5
59.041.0
01
067B2175
TEX
范文二:艾默生丹佛斯膨胀阀工作原理
1楼
1 概述
热力膨胀阀是组成制冷装置的重要部件,是制冷系统中四个基本设备之一。
它实现从冷凝压力至蒸发压力的压降,同时控制制冷剂的流量;它的体积虽小,
但作用巨大,它的工作好坏,直接决定整个系统的运行性能。但是在实际工作中,
热力膨胀阀的运行情况往往被忽视,使热力膨胀阀成为设备维护中的一个死角。
而定期检查和调整热力膨胀阀,对制冷设备的运行寿命,节约能源,降低运行成本,
却有着重要的意义。
2 热力膨胀阀的工作过程分析
2.1 热力膨胀阀工作原理
热力膨胀阀是通过感受蒸发器出口气态制冷剂的过热度来控制进入蒸发器的制冷剂流量。
按照平衡方式不同,热力膨胀阀分为外平衡式和内平衡式。在工业冷却设备中,
一般采用外平衡式热力膨胀阀。热力膨胀阀由感应机构、执行机构、调整机构和阀体组成。
感应机构中充注氟利昂工质,感温包设置在蒸发器出口处,
其出口处温度与蒸发温度之间存在温差,通常称为过热度。感温包感受到蒸发器出口温度后,
使整个感应系统处于对应的饱和压力Pb。该压力将通过膜片传给顶杆直到阀芯。
在压力腔上部的膜片仅有Pb存在,膜片的下方有调整弹簧的弹簧力Pt和蒸发压力P0,
三者处于平衡时有Pb=Pt+Po 。当蒸发器热负荷增大时,
出口过热度偏高,Pb增大,Pb>Pt+Po,合力使顶杆、阀芯下移,热力膨胀阀开启增大,
制冷剂流量按比例增加。反之,热力膨胀阀开启变小,制冷剂流量按比例减小。因此,
制冷设备是由热力膨胀阀通过控制过热度实现制冷系统的自我调整。
2.2 确定正确的过热度
要保证热力膨胀阀工作在最佳匹配点,就必须保证热力膨胀阀有合适的过热度。
热力膨胀阀的过热度由静装配过热度与有效过热度组成。使阀门开始开启所需要的
过热度称为开启过热度,又叫静装配过热度,一般的静装配过热度约为3℃。
从热力膨胀阀开始开启至额定开度所需要的过热度增量,称为热力膨胀阀的
有效过热度或可变过热度。其数值的大小与弹簧的刚度及阀芯的行程有关,
一般有效过热度约为2~5℃,通常把热力膨胀阀的静装配过热度与有效过热度之和
称为工作过热度,即平时所说的过热度。因此,我们只有保证过热度在合适的范围内,
制冷系统才能达到最大冷量,又不会引起湿冲程。工业油冷却机过热度都要求在5~8℃之间。
如果发现过热度不在该范围内,就要进行调整。
3 检查调整热力膨胀阀的必要性
制冷设备刚投入运行,热力膨胀阀是不用调整,但是在设备连续使用几年后,
由于阀针的磨损、系统有杂质、阀孔部分有堵塞及
弹簧弹力减弱等原因,
影响了热力膨胀阀的开启度,使得热力膨胀阀偏离了它的工作点,表现为热力膨胀阀开启度偏小或过大。
热力膨胀阀开启度太小的话,就会造成供液不足,使得没有足够的氟利昂在蒸发器内蒸发,
制冷剂在蒸发管内流动的途中就已经蒸发完了,在这以后的一段,蒸发器管中没有液体制冷剂可供蒸发,
只有蒸汽被过热。因此,相当一部分的蒸发器未能充分发挥其效能,造成制冷量不足,
降低了设备的制冷效果。工业油冷却机的压缩机大多采用蒸发器回来的蒸汽来冷却压缩机,
如果热力膨胀阀开启不够,就造成蒸汽过热度过大,对压缩机冷却作用减小,
压缩机的排气温度会增高,润滑油变稀,润滑质量降低,压缩机的工作环境恶化,
会严重影响压缩机的工作寿命甚至烧毁压缩机。据分析与过热度过大有关。
另外由于被冷却介质温度降不下来,又增加了压缩机的运行时间,也增加了耗电量。
与此相反,如果热力膨胀阀开启过大,即热力膨胀阀向蒸发器的供液量大于蒸发器负荷,
会造成部分制冷剂来不及在蒸发器内蒸发,同气态制冷剂一起进入压缩机,
引起湿冲程,甚至冲缸事故,损坏压缩机。同时,热力膨胀阀开启过大,
使蒸发温度升高,制冷量下降,压缩机功耗增加,增加了耗电量。因此,
有必要定期检查调整热力膨胀阀,尽量让热力膨胀阀工作在最佳匹配点。
范文三:丹佛斯电子膨胀阀AKV Catalogue
MAKING MODERN LIVING POSSIBLE
DKRCC.PD.VA1.A5.02 / 520H65881
Technical brochure
Electrically operated expansion valves,type AKV 10, AKV 15 and AKV 20
HCFC and Non-flamable HFC The valve requires no adjustment Wide regulation range Replaceable orifice assembly
Both expansion valve and solenoid valve. Wide range of coils for d.c. and a.c.
Features
AKV are electrically operated expansion valves designed for refrigerating plant. The AKV valves can be used for HCFC and HFC, R744 refrigerants. The AKV valves are normally controlled by a con-troller from Danfoss’ range of ADAP- KOOL? con-trollers.
The AKV valves are supplied as a component pro-gramme, as follows: Separate valve
Separate coil with terminal box or cable
Spare parts in the form upper part, orifice and filter
The individual capacities are indicated with a number forming part of the type designation. The number represents the size of the orifice of the valve in question. A valve with orifice 3 will for example be designated AKV 10-3. The orifice assembly is replaceable.
The AKV 10 valves covers a capacity range from0.6 kW to 14 kW (R404A/R507) and are divided up into 7 capacity ranges.
The AKV 15 valves cover a capacity range from14 kW to 85 kW (R404A/R507) and are divided up into 4 capacity ranges.
AKV 15 valves can be used for cold rooms.The AKV 20 valves cover a capacity range from56 kW to 530 kW (R404A/R507) and are divided up into 5 capacity ranges.
The AKV 20 can be used for water chiller units.
DKRCC.PD.VA1.A5.02 / 520H6588
2Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Technical data
Rated capacity and Ordering
Condensing temperature t c = 32°C Liquid temperature t l = 28°C Evaporating temperature t e =
5°C
Filter.
On plants using AKV 15 or AKV 20 a filter must be mounted in front of AKV 15 and AKV 20.
AKV 10 has built-in filter and ex-ternal filter is not necessary.
DEMKO, DenmarkSETI, Finland
SEV, Switzerland
UL listed (separate code. nos.) CSA certified (separate code. nos.)
Approvals
DKRCC.PD.VA1.A5.02 / 520H65883
Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Filter: Contents:
Code no. 068F054010 pcs. filters
10 pcs. Al. gaskets
Upper part: Contents: Code no. 068F05411 pc. armature ass.
1 pc. armature tube1 pc. Al. gasket
Gasket for upper part: Contents:
Code no. 068F054925 pcs. Cu/Tn gaskets
Spare partsAKV 10
AKV 15
AKV 20Filter: Contents:
Code no. 068F054010 pcs. filters
10 pcs. Al. gaskets
Upper part: Contents:Code no. 068F50451 pc. armature ass.
1 pc. armature tube1 pc. Al. gasket
Gasket for upper part: Contents:
Code no. 068F054925 pcs. Cu/Tn gaskets
Gasket set: Contents:
Code no. 042H0160Complete gasket set for new and old
valves
Upper part: Contents:Code no. 068F50451 pc. armature ass.
1 pc. armature tube1 pc. Al. gasket
Gasket for upper part: Contents:
Code no. 068F0549
25 pcs. Cu/Tn gaskets
Orifice
Piston
Gasket set:Contents:
Code no. 068F526330 pcs. O-rings10 pcs. Cu. gasket
10 pcs. gasket
Piston
Orifice set
Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
DKRCC.PD.VA1.A5.02 / 520H6588 4
DKRCC.PD.VA1.A5.02 / 520H65885
Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Capacity
The evaporator capacity used must be corrected, if the subcooling deviates from 4 K.
Use the actual correction factor indicated in the table.
Multiply the evaporator capacity by the correc-tion factor to obtain the corrected capacity.
Correction for subcooling
DKRCC.PD.VA1.A5.02 / 520H6588
6Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Capacity
(continued)
The evaporator capacity used must be corrected, if the subcooling deviates from 4 K.
Use the actual correction factor indicated in the table.
Multiply the evaporator capacity by the correc-tion factor to obtain the corrected capacity.
Correction for subcooling
DKRCC.PD.VA1.A5.02 / 520H65887
Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Capacity (continued)
Correction for subcooling
The evaporator capacity used must be corrected, if the subcooling deviates from 4 K.
Use the actual correction factor indicated in the table.
Multiply the evaporator capacity by the correc-
tion factor to obtain the corrected capacity.
DKRCC.PD.VA1.A5.02 / 520H6588
8Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
To obtain an expansion valve that will function correctly under different load conditions it is necessary to consider the following points when sizing the valve:
These points must be dealt with in the following sequence:
1) Evaporator capacity
2) Pressure drop across the valve3) Correction for subcooling
4) Correction for evaporating temperature5) Determination of valve size
6) Correctly dimensioned liquid line
Valve sizing
1) Evaporator capacity
The evaporator capacity is found in the specifi-cations from the evaporator supplier.
2) Pressure drop across the valve
The pressure drop across the valve directly determines the capacity and must therefore be considered.
The pressure drop across the valve is normally calculated as the condensing pressure less the evaporating pressure and sundry other pressure drops in the liquid line, distributor, evaporator, etc.It is indicated in the following formula:?p valve = pc – (pe + ?p 1 + ?p 3 + ?p 4) ?p 3 pressure drop across the distributor system?p 4 pressure drop across the evaporator
Note!
distributor system must be calculated on thebasis of the valve’s max. capacity, as the valveoperates with pulse-width modulation.Example of calculation of pressure drop acrossa valve:
Refrigerant: R22
Condensing temperature: 35°C (pc = 13.5 bar)Evaporating temperature: 0 - 6°C (pe = 4.1 bar)?p 1 = 0.2 bar?p 3 = 0.8 bar?p 4 = 0.1 bar
This will give you the following equation:?p valve = pc – (pe + ?p 1 + ?p 3 + ?p 4) = 13.5 – (4.1 + 0.2 + 0.8 + 0.1) = 8.3 barThe found value for “pressure drop across the valve” is used later in the section “Determination of valve size” .
DKRCC.PD.VA1.A5.02 / 520H65889
Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
3) Correction for subcooling
The evaporator capacity used must be cor-rected, if the subcooling deviates from 4 K. Use the actual correction factor indicated in the table.
Multiply the evaporator capacity by the correc-tion factor to obtain the corrected capacity.
Valve sizing (continued)
The corrected capacity is used in the section “De-termination of valve size” . Example of corection:Refrigerant: R22
Evaporator capacity Qe : 5 kWSubcooling: 10 K
Correction factor according to the table = 0.94Corrected capacity = 5 × 0.94 = 4.7 kW.Note: Too little subcooling may cause flash gas.
4) Correction for evaporating temperature (te ) To obtain a correctly dimensioned valve it is important that the application is considered. Depending on the application, the valve should have an overcapacity enabling it to cope with the extra amount of refrigeration needed during certain periods, e.g. during the defrost recovery process.
The valve’s opening degree should therefore be between 50 and 75% when regulating. In this way it is ensured that the valve has a sufficiently wide regulation range, so that it can manage changed loads at or near the normal working point.
Correction factors based on the evaporating tem-
perature are indicated below:
5) Determination of valve size
When the valve size meeting the required ca-pacity is selected it is important to note that the capacity indications are the valve’s rated capacity, i.e. when the valve is 100% open.
In this section we tell you how the valve’s size is determined.
There are three factors that have an influence on the choice of the valve:
- the pressure drop across the valve - the corrected capacity (correction for subcooling)
- the corrected capacity for evaporating temperature
The three factors have been described earlier in this section on dimensioning. When these three factors have been established, the selec-tion of the valve can be made:
- First you multiply the “corrected capacity” by a value stated in the table.
- Use the new value in the capacity table in com-bination with the pressure drop value.- Now select the valve size.
Example of selection of valve
Use as starting point the two earlier mentioned examples, where the following two values have been obtained:?p valve = 8.3 barQ e corrected = 4.7 kW
The valve should be used in a coldroom. Conse-quently, 1.25 should be selected as “correction factor for the evaporating temperature” .
The dimensioned capacity will then be: 1.25 x 4.7 kW = 5.88 kW.
Now select a valve size from one of the capacity tables.
With the given values ?p valve = 8.3 bar and a ca-pacity of 5.88 kW, select the valve size for AKV 10-5.
This valve will have a capacity of approx. 7 kW.
Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Valve sizing(continued)6) Correctly dimensioned liquid line
To obtain a correct supply of liquid to the AKV valve, the liquid line to the individual AKV valve must be correctly dimensioned.
The liquid flow rate should not exceed 1 m/sec. This must be observed on account of the pressure drop in the liquid line (lack of subcooling) and pulsations in the liquid line.
with which it is operating (cf. capacity table), and not on the evaporator’s capacity.
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AKV 15
AKV 20
AKV 10
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Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
Design
1. I nlet 2. Outlet 3. Orifice 4. Filter
5. Valve seat 6. Armature
7. Copper gasket 8. Coil
9. DIN plug 12. O-ring
1. I nlet 2. Outlet 3. Orifice
4. Piston assembly 7. Coil
8. Armature 9. Pilot orifice 10. Filter 11. Cover
12. Valve body 13. Spring
14. Orifice assembly
1. I nlet 2. Outlet 3. Orifice 4. Valve seat 5. Filter
6. Pilot orifice 7. O-ring 8. Coil
9. Terminal box
AKV 15
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12Electrically operated expansion valves, type AKV 10, AKV 15 and AKV 20
The valve capacity is regulated by means of pulse-width modulation. Within a period of six seconds a voltage signal from the controller will be transmitted to and removed from the valve coil. This makes the valve open and close for the flow of refrigerant.
The relation between this opening and closing time indicates the actual capacity. If there is an intense need for refrigeration, the valve will remain open for almost all six seconds of the period. If the re-quired amount of refrigeration is modest, the valve will only stay open during a fraction of the period. The amount of refrigeration needed is de-termined by the controller.
When no refrigeration is required, the valve will remain closed and thus function as a solenoid valve.
Function
Dimensions and weights
AKV 10 solder
AKV 20
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Dimensions and weights
(continued)
范文四:丹佛斯热力膨胀阀TE5
DKRCC.PD.AB0.A3.02 / 520H5227
MAKING MODERN LIVING POSSIBLE
The TE series expansion valve regulate the injection of refrigerant into evaporators. It controls the refrigerant flow based on the superheat. The exchangeable power element is produced with the well known Danfoss laser welding technology for extended lifetime capability. The TE series is available with a wide range of orifices which will cover a wide range
of applications.
Technical brochure
Thermostatic expansion valvestype TE5 to TE55
Features Large operating range: N-range -40°C to +10°C / B-range -60°C to -25°C
Interchangeable orifice assembly.
Stainless steel power element, capillary tube and bulb.
Wide capacity range. MOP function is available.
Superior charge performance. Patented bulb strap design.
MWP (maximum working pressure) 28 bar. Wide capacity range to minimize capacity gap and overlap.
TE55 has balanced orifice design.
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Identification
Element label
Orifice assembly marking
for TE5 to TE55
The thermostatic element is fitted with a label (on top of the diaphragm). The code refers to the refrigerant for which the valve is designed:X = R22N = R134a
S = R404A/R507Z = R407C
The label holds information like valve type, evaporating temperature range, MOP point, refrigerant, and max. test pressure, PS.Orifice assembly for TE5, TE12, 20 and 55
The orifice assembly is marked on top of the spring cup, e.g. as shown in the figure.For a given size of valve, the same orifice
assembly can be used for valves with ranges N and B.
TE12 = For valve type05 = Orifice no.
067B2708 = Orifice code no. for sales order1009 = Production date (Week, Year)
Capillary tube tag for TE5 to TE55
The label gives the orifice size (04). A new label always accompanies a new orifice assembly.
TE5 to TE55
Max. temperature
Bulb, when valve is assembled: 100°C
Complete valve when not assembled: 70°C
SS = static superheatOS = opening superheat
SH = SS + OS = total superheatQ nom = rated capacity
Q max = maximum capacity
Static superheat SS can be adjusted with setting spindle.
The standard factory superheat setting SS is 4 K.The opening superheat OS is 4 K from when opening begins to where the valve reaches its rated capacity Qnom .
Superheat
Example
Static superheat SS = 4 KOpening superheat OS = 4 KTotal superheat SH = 4 + 4 = 8 K
Using orifice with range B element, please check superheat under running conditions and re-adjust superheat setting, if necessary.
Min. temperature: –60°CMax. test pressure: 32 bar
Maximum working pressure:
28 bar
Technical data
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Design/Function
General
All TE valves have an interchangeable orifice assembly.
TE5 to TE55 valves are built up of three main components:
1 - Thermostatic element2 - Orifice assembly
3 - Valve body with connections
The orifice is refrigerant and range independend.
All valves are equipped with external pressure equalization.
To ensure long operating life, the valve cone and seat are made of a special alloy with particularly good wear properties.
1. Thermostatic element (diaphragm)2. Interchangeable orifice assembly 3. Valve body
4. Superheat setting spindle (see instructions)
5. Ext. pressure equalizing connection with 1?4 in./6 mm flare nut
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Ordering
Bulb strap for TE5 to TE55 delivered with the element
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
5
2
) ODF × ODM3) ODM × ODM
ODF = Internal diameterODM = External diameter
Ordering
(continued)
Evaporating temperature t e = +4.4°CCondensing temperature
t c = +38°CRefrigerant temperature ahead of valve
t l =
+37°C
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Subcooling correction factor 'fsub'
Capacity in kW, range N, -40°C to +10°C, opening superheat sh= 4 K Q (capacity) = 45kW
Tcon (condensing temperature) = 25°CTevap (evaporator temperature) = -30°CTsub (subcooling temperature) =10KDpd (distributer pressure drop) = 2 bar
Q (capacity) = 45kW
fsub (subcooling correction factor) = 1.09fp (distribution correction factor) = 0.85
Q = Selected capacityfsub x fp
45= 48.6 kW
1.09 x 0.85
The selection will be:
TE55 orifice 10 (52.70 kW > 48.6 kW)
How to select a valve:Example:
Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Technical brochure
Thermostatic expansion valves, type TE5 to TE55
Subcooling correction factor ‘fsub’
Distributer correction factor ‘fp’
Capacity in kW, range N, -40°C to +10°C, opening superheat sh= 4 K
Q (capacity) = 45kW
Tcon (condensing temperature) = 25°CTevap (evaporator temperature) = -30°CTsub (subcooling temperature) =10KDpd (distributer pressure drop) = 2 bar
Q (capacity) = 45kW
fsub (subcooling correction factor) = 1.10fp (distribution correction factor) = 0.92
Q = Selected capacityfsub x fp
45= 44.5 kW
1.10 x 0.92
The selection will be:
TE20 orifice 8 (48.4 kW > 44.5 kW)
How to select a valve:Example:
Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Technical brochure
Thermostatic expansion valves, type TE5 to TE55
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Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Technical brochure
Thermostatic expansion valves, type TE5 to TE55
Subcooling correction factor ‘fsub’
Distributer correction factor ‘fp’
Capacity in kW, range N, -40°C to +10°C, opening superheat sh= 4 K
Q (capacity) = 45kW
Tcon (condensing temperature) = 25°CTevap (evaporator temperature) = -30°CTsub (subcooling temperature) =10KDpd (distributer pressure drop) = 2 bar
Q (capacity) = 45kW
fsub (subcooling correction factor) = 1.08fp (distribution correction factor) = 0.92
Q = Selected capacityfsub x fp
45= 45.3 kW
1.08 x 0.92
The selection will be:
TE12 orifice 7 (46.5 kW > 45.3 kW)
How to select a valve:Example:
Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Technical brochure
Thermostatic expansion valves, type TE5 to TE55
Capacity in kW, range N, -40°C to +10°C, opening superheat sh= 4 K
Subcooling correction factor 'fsub'Q (capacity) = 45kW
Tcon (condensing temperature) = 25°CTevap (evaporator temperature) = -30°CTsub (subcooling temperature) =10KDpd (distributer pressure drop) = 2 bar
Q (capacity) = 45kW
fsub (subcooling correction factor) = 1.07fp (distribution correction factor) = 0.90
Q = Selected capacityfsub x fp
45= 46.7 kW
1.07 x 0.90
The selection will be:
TE12 orifice 7 (53.1 kW > 46.7 kW)
How to select a valveExample:
Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Technical brochure
Thermostatic expansion valves, type TE5 to TE55
16DKRCC.PD.AB0.A3.02 / 520H5227 Danfoss A/S (AC-SMC / sw), 03 - 2011
Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Technical brochure Thermostatic expansion valves, type TE5 to TE55
Dimensions and weights
TE5
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Technical brochure Thermostatic expansion valves, type TE5 to TE55
Danfoss A/S (AC-SMC / sw), 03 - 2011 DKRCC.PD.AB0.A3.02 / 520H5227
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Dimensions and weights (continued)
范文五:丹佛斯热力膨胀阀现场应用分析及建议
据统计,2016年客户投诉热力膨胀阀共计84只。其中安装不当导致膨胀阀故障的有27只。通过检测,膨胀阀为正常的有22只。现场环境腐蚀导致故障的有20只。另外还有选型不当、系统脏堵、运输磕碰等原因导致膨胀阀故障的15只(详如下表)。
膨胀阀安装不当(投诉率占比32.14%)。力矩过大导致丝口脱丝、变形。
使用建议:对于丹佛斯T2阀的安装,建议使用力矩扳手操作,力矩要求在丹佛斯安装指导规定下作业。只有在装入阀芯条件下,才可对纳子施加力。(详如下图所示)
阀体受热破损
使用建议:焊接时,请务必用湿水纱布对阀体进行全方位包裹。避免火焰直接对准阀体、感温包、毛细管等部位。(阀体所能承受温度如下图所示)
投诉件检测为正常件(投诉率占比26.19%)。现将几种常见的疑似膨胀阀故障的情况进行列举,以供参考。故障原因:系统缺失制冷剂/系统制冷剂过多。故障现象:开机后系统报低压/系统报高压易误判为:膨胀阀不通处理方法:添加适量制冷剂/排放适量制冷剂。故障原因:系统有水分,蒸发温度低于冰点温度时,膨胀阀节流部位冰堵。故障现象:系统刚开机时正常,运行一段时间后低压越来越低。易误判为:膨胀阀不通。处理方法:1、更换干燥过滤器。2、排除制冷剂,重新抽真空充注。故障原因:平衡管不通(a、铜管焊接堵塞b、软管连接针阀没有被顶开),高压侧制冷剂由阀体内部泄露进入膜片下方,导致膨胀阀处关闭状态。故障现象:开机后机组频频低压报警。易误判为:膨胀阀不通。处理方法:疏通平衡管。腐蚀导致膨胀阀故障(投诉率占比23.80%) ?。通过与客户沟通得知,腐蚀阀件多应用于化工厂、消毒冷库、船舶、盐水池等环境(具有一定的重复性,频发性)。因腐蚀破坏膨胀阀案例中,腐蚀穿孔部位多发生在膨胀阀毛细管。(详如下图)
由腐蚀部位元素分析得知,腐蚀区多富含氯的腐蚀物
建议解决方案:机组远离腐蚀环境,勿使用含氯消毒剂。使毛细管保持自由状态,清洁,勿使用绝缘套管(大部分绝缘材料都是含氯化物)。对于一些用于腐蚀环境的膨胀阀,可将其阀体、毛细管及感温包表面涂抹清漆,尽量避免阀与空气中腐蚀物质的接触。感温包处保温工作要认真,避免形成水蒸气在感温包处凝结。