Features of bellows seal valves:
●Double wall bellows seal as standard.
●Plug with marginal seat
●Bellows seal welded to cover
●Welded seat
● Bellows seal 10,000 load cycles
● External stem thread
●Secondary sealing: graphite+bellows sealing
Technical specification
Design standard: DIN EN 13709:2003
Face to face dimension: DIN EN 558-1
Flange ends: DIN EN 1092-1
Test & inspection: DIN EN 12266:2003
Advantage：
1.Bellow seal element. The key part of bellow sealed globe valves is metal bellow. It is the connection between cover and stem with automatic roll welding. The metal bellow can keep the stem part no leakage.
2.Benefit from the con and streamline shape design, the disc has a reliable seal and longer service life.
3.Double seal design(bellows+packing). Bellow and packing can protect against leakage and provide a excellent seal.
4.Grease nipple. It can direct lubricate the stem, nut and sleeve.
5.Ergonomic hand wheel. It provide longer service life and easier operation.
Pressure-Temperature
ratings
Material
PN
PRESSURE-TEMPERATURE
RATINGS ACC.TO DIN EN 1092-1 ( Bar )
-29 to 38 ℃
50
100
150
200
250
300
350
400
425
WCB
1.0619
PN16
16
16
15
14.2
13.4
12.3
11.1
10.4
9.6
8.3
PN25
25
25
23.4
22.2
21.0
19.2
17.4
16.2
15.0
13.0
PN40
40
40
37.4
35.5
33.6
30.7
27.8
25.9
24.0
20.8
PN63
63
63
59.0
55.9
52.9
48.4
43.8
40.8
37.8
32.7
PN100
100
100
93.6
88.8
84.0
76.8
69.6
64.8
60.0
51.9
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