Purpose:
Gate valve with bellow seal acc.to ANSI is applicable to the cutting and connection of pipelines medlum that are used in various indus-tries such as peroleum,chemical industry,pharmacy.chemical fertilizer,electric power industry etc under nominal pressure of CLASS150-1500LBS and working temperature of-29-350.
Structural features:
1.This product has logical structure.reliable seal.excellent performance and nice design.
2.The seal surface is build-up welding with Co hard alloy,which is attrition-resistant,corrosion-resistant,has good friction resistant and long life.
3.The stem is quenched and tempered.and its surface is treated by nitriding treatment,thus it has good corrosion resistant and friction resistant.
4.It has double seal capability.thus is more reliable.
5.The stem may show the position of lift,thus it is chearer.
6.The part material,flange and butt weld end dimension may be selected accordng to current operating condition and users'requirement,so that meet the requirements of various engineering.
Technical specification
Structural formation: BB-BG-OS&Y
Driving manner: Hand-operated Electric-actuated
Design standard: DIN3356
Face to face: DIN3202
Flange ends: DIN2543-2545
Test & inspection: DIN3230
Notes: The size of serial, valve connecting flange can be design according to customers requirement,
Products performance specification
|
Nominal pressure(MPa)
|
Shell test(MPa)
|
Sealing test(MPa)
|
Suitable temp.(℃)
|
Suitable medium
|
|
1.6
|
2.4
|
1.76
|
≤350℃
|
Water oil & gas
|
|
2.5
|
3.75
|
2.75
|
|
4.0
|
6.0
|
4.4
|
|
6.4
|
9.6
|
7.04
|
Main parts materials
|
NO.
|
Part name
|
Material
|
|
1
|
Body
|
GS-C25 1.7363、1.4308、1.4408、1.4306、1.4301
|
|
2
|
Disc
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
3
|
Pin
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
4
|
Bellow assemble
|
1Cr18Ni9Ti、304、316
|
|
5
|
Stem
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
6
|
Bonnet
|
GS-C25 1.7363、1.4308、1.4408、1.4306、1.4301
|
|
7
|
Packing
|
Flexible graphite、PTFE
|
|
8
|
Gland
|
GS-C25 1.7363、1.4308、1.4408、1.4306、1.4301
|
|
9
|
Guide piece
|
25、45、304、316
|
|
10
|
Yoke nut
|
ZQA19-4
|
|
11
|
Hand wheel
|
WCB、QT400-18
|
|
12
|
Bolt
|
ASTM A193-B7、A193-B8、A193-B8M
|
|
13
|
Nut
|
ASTM A194-2H、A194-8、A194-8M
|
|
14
|
Gasket
|
Flexible graphite + stainless steel、PTFE
|
Main dimension and weight
|
Model
|
LFDWJ41-16
|
|
Pressure
|
PN16
|
|
Size
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
730
|
850
|
980
|
|
H
|
195
|
200
|
220
|
225
|
235
|
250
|
260
|
265
|
370
|
400
|
515
|
550
|
600
|
630
|
680
|
|
W
|
120
|
140
|
140
|
160
|
160
|
180
|
200
|
220
|
250
|
300
|
350
|
400
|
450
|
500
|
500
|
|
Weight
|
4
|
4.5
|
5
|
7
|
9
|
12.5
|
18
|
23
|
41
|
54
|
90
|
160
|
260
|
410
|
610
|
|
Model
|
LFDWJ41-25
|
|
Pressure
|
PN25
|
|
Size
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
730
|
850
|
980
|
|
H
|
195
|
200
|
220
|
225
|
235
|
250
|
260
|
265
|
370
|
400
|
515
|
550
|
600
|
630
|
680
|
|
W
|
120
|
120
|
140
|
160
|
160
|
180
|
200
|
220
|
250
|
300
|
350
|
400
|
450
|
500
|
500
|
|
Weight
|
4
|
4.5
|
5
|
7.5
|
9.5
|
13
|
19
|
24
|
43
|
57
|
95
|
168
|
300
|
510
|
680
|
|
Model
|
LFDWJ41-40
|
|
Pressure
|
PN40
|
|
Size
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
730
|
850
|
980
|
|
H
|
195
|
200
|
220
|
225
|
235
|
250
|
260
|
265
|
370
|
400
|
515
|
550
|
600
|
630
|
680
|
|
W
|
120
|
120
|
140
|
160
|
160
|
180
|
200
|
220
|
250
|
300
|
350
|
400
|
450
|
500
|
500
|
|
Weight
|
4
|
4.5
|
5
|
8
|
10
|
13.5
|
20
|
25
|
45
|
60
|
98
|
171
|
340
|
580
|
780
|