Siemens 599-02005 Technische Anweisungen - Seite 8

Blättern Sie online oder laden Sie pdf Technische Anweisungen für Kontrolleinheit Siemens 599-02005 herunter. Siemens 599-02005 12 Seiten. Mt series terminal unit two-way valves

Seite drucken
Siemens 599-02005 Technische Anweisungen
Technical Instructions
Document Number 155-196P25
April 9, 2009
A
2W NC
2W NO
B

Operation

Sizing
Page 8
2W, NC, SQS...
100
690
90
621
95
80
552
(655)
70
483
60
414
50
345
50
40
276
(345)
40
30
207
(276)
20
138
10
69
0
0
1/2",
1/2",
3/4" and 1"
Cv>0.4
Cv>2.5
Cv <1.6
Cv <4
Line Size (in)
2W, NO, SQS...
180
1241
160
1103
160
140
966
(1103)
120
828
100
690
80
552
85
60
70
414
(586)
(483)
40
276
20
138
0
0
1/2",
1/2",
3/4" and 1"
Cv>0.4
Cv>2.5
Cv <1.6
Cv <4
Line Size (in)
SQS...
Figure 2. Close-off Pressures.
Figure 3 shows the normally open valve in the open or full flow position and the
normally closed valve in the closed or zero flow position. The valve spring provides the
necessary force to hold the stem in the raised or normal position.
In the event of power failure, a spring return actuator returns the valve to its normal
position. Non-spring return actuators will hold the last commanded position. See the
Technical Instructions of the various actuators for additional information.
The sizing of a valve is important for correct system operation. An undersized valve will
not have sufficient capacity at maximum load. An oversized valve can initiate cycling,
and the seat and throttling plug can be damaged because of the restricted opening.
Correct sizing of the control valve for actual expected conditions is considered essential
for good control.
See Tables 3 through 6 for valve capacities.
Powermite 599 MT Series Terminal Unit 2-way Valves
2W, NC, SSC...
100
690
90
621
95
80
552
(655)
70
483
60
414
50
345
50
40
276
(345)
40
30
207
(276)
20
138
10
69
0
0
1/2",
1/2",
3/4" and 1"
Cv>0.4
Cv>2.5
Cv <1.6
Cv <4
Line Size (in)
2W, NO, SSC...
140
996
120
828
120
100
690
(828)
80
552
60
414
65
55
(448)
40
276
(379)
20
138
0
0
1/2",
1/2",
3/4" and 1"
Cv>0.4
Cv>2.5
Cv <1.6
Cv <4
Line Size (in)
SSC...
NORMALLY OPEN
Figure 3.
2W, NC, 10 - 15 psi
100
690
90
621
95
80
(655)
552
70
483
60
414
50
345
50
40
276
(345)
40
30
207
(276)
20
138
10
69
0
0
1/2",
1/2",
3/4" and 1"
Cv <1.6
Cv <4
Cv<10
Line Size (in)
2W, NO, 3 - 8 psi
100
690
90
95
621
(655)
80
552
70
483
60
414
50
345
40
45
276
(310)
30
35
207
(241)
20
138
10
69
0
0
1/2",
1/2",
3/4" and 1"
Cv <1.6
Cv <4
Cv<10
Line Size (in)
2-in Pneumatic
NORMALLY CLOSED
Siemens Building Technologies, Inc.