Description
Globe valve (also called stop valve) is mainly composed of valve body, disc, shaft pin and stem. Flanged forged steel globe valve is a valve with closure member (disc) moving along with the center line with valve seat. Since it has relative short opening and closing stroke, this valve is very suitable for cutting off and regulating medium flow. Our flanged globe valve is widely applied on tap water, sewage, building, petroleum, chemical, food, medicine, textile, electricity, ship, metallurgy, energy and other pipeline systems.
Advantages
1. It needs small torsion to open the valve.
2. Flanged forged steel globe valve is featured by fine sealing performance and long service time.
3. Friction is small between sealing surfaces.
4. Precision casting technology is adopted to manufacture valve body.
5. Two times shot blasting makes exquisite outward appearance of the flanged globe valve.
6. CNC processing is applied on valve disc.
7. All our products have passed CE and JB/T9092 certification.
8. 18 months warranty and lifetime technology service are offered for our products.
Applications
1. Flanged globe valve is suitable for high temperature and pressure medium pipelines and devices, such as petrochemical pipelines systems in thermal power plants and nuclear power stations.
2. It is applicable for pipelines with small requirement on flow resistance, that is, it is suitable for pipelines where too much consideration of pressure loss is not necessary.
3. Low requirement on regulating precision and small diameter (nominal diameter ≤ 50 mm) pipeline should employ flanged forged steel globe valve.
4. In compound industry, chemical fertilizer production should utilize high pressure angle type globe valve.
5. In alumina production process, straight flow globe valve (with cemented carbide sealing and removable valve seat) should be employed on easy coking pipeline in desilication workshop.
6. The flanged globe valve is extensively used on water and heat supply engineering in urban construction.
Features
1. Globe valve (stop valve) is much easier than gate valve in structure, manufacturing and maintenance.
2. When opened or closed, there is no relative sliding between valve body and disc.
3. Globe valve is lower but longer than gate valve.
4. Since medium channel twists and turns in valve body, the fluid resistance is big.
5. The medium in the flanged forged steel globe valve can only flow in one direction and the flowing direction can not be changed when the flanged globe valve is in operation.
Classifications of Globe Valve
1. According to channel direction of globe valve, it can be classified into straight through type/straight flow type/angle type/plunger type globe valve.
2. According to the location of the thread on valve stem, it can be divided into upper/lower threaded stem globe valve.
3. According to application, it can be classified into heating jacket/forged steel/oxygen dedicated/bellows/low temperature globe valve (stop valve).
Pressure: CLASS900-2500 PN16.0-42.0
1. Welded Bonnet/Pressure Sealed Bonnet
2. Reduced Port
3. General Disc
4. Flange Ends/Butt-Welding Ends
Technical Specification of Flanged Globe Valve
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Technical Specification
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ASME/API/BS
|
GB/JB
|
|
Design Standard
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ASME B16.34/BS5352
|
GB/T12235 GB/T12224
|
|
Pressure-Temperature Rating
|
ASME B16.34
|
GB/T12224
|
|
Face-Face
|
ASME B16.10
|
GB/T12221 JB/T96-95
|
|
Flange Ends
|
ASME B16.5
|
GB/T9113 JB/T82.1~82.4
|
|
Buttwelding Ends
|
ASME B16.25
|
GB/T12224
|
|
Inspection & Test
|
API598
|
JB/T9092
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Material List for Main Parts of Flanged Globe Valve
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No.
|
Part Name
|
ASTM
|
|
Carbon Steel
|
Tailess Steel
|
Alloy Steel
|
|
1
|
Body
|
A105
|
LF2/LF3
|
A182 F304
|
A182 F11/F22
|
|
2
|
Disc
|
A182F6a
|
A182F6a
|
A182 F304
|
A182 F6a
|
|
3
|
Stem
|
A276-410
|
A276-410
|
A276-304
|
A276-410
|
|
4
|
Gasket
|
Graphite+304
|
|
5
|
Sealing Ring
|
Graphite
|
|
6
|
Yoke
|
A216-WCB
|
A216-WCB
|
A351 CF8
|
A216-WCB
|
|
7
|
Bonnet
|
A105
|
LF2/LF3
|
A182 F304
|
A182 F11/F22
|
|
8
|
Gland
|
A216-WCB
|
A216-WCB
|
A351 CF8
|
A216-WCB
|
|
9
|
Bolt
|
A193 B7
|
A320L7
|
A193 B8
|
A193 B16
|
|
10
|
Packing
|
Graphite
|
|
11
|
Stem Bushing
|
A276-410
|
A276-410
|
A276-304
|
A276-410
|
|
12
|
Gland
|
A216-WCB
|
A216-WCB
|
A351 CF8
|
A216-WCB
|
|
13
|
Eye Blot
|
A193 B7
|
A320 L7
|
A193 B8
|
A193 B7
|
|
14
|
Stem Nut
|
A276-410
|
|
15
|
Hand Wheel
|
A197 or A47-32510
|
Main Dimensions & Weight of Flanged Forged Steel Globe Valve
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Pressure
|
Size
|
Main Dimension of Flanged Globe Valve
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Weight(kg)
|
|
mm
|
in.
|
D
|
LRF
|
LBW
|
LRTJ
|
H
|
W
|
|
WB
|
PB
|
WB
|
PB
|
|
CLASS900 PN16.0
|
15
|
1/2
|
10
|
216
|
216
|
216
|
310
|
333
|
180
|
13.5
|
12.5
|
|
20
|
3/4
|
13
|
229
|
229
|
229
|
310
|
333
|
180
|
12.6
|
11.8
|
|
25
|
1
|
19.1
|
254
|
254
|
254
|
310
|
333
|
180
|
11.8
|
11.5
|
|
32
|
1-1/4
|
25
|
279
|
279
|
279
|
389
|
420
|
200
|
24.4
|
23.4
|
|
40
|
1-1/2
|
32
|
305
|
305
|
305
|
389
|
420
|
200
|
22.5
|
21.7
|
|
50
|
2
|
38.1
|
368
|
368
|
371
|
498
|
524
|
300
|
45.5
|
43.5
|
|
CLASS1500 PN26.0
|
15
|
1/2
|
10
|
216
|
216
|
216
|
310
|
333
|
180
|
13.5
|
12.5
|
|
20
|
3/4
|
13
|
229
|
229
|
229
|
310
|
333
|
180
|
12.6
|
11.8
|
|
25
|
1
|
19.1
|
254
|
254
|
254
|
310
|
333
|
180
|
11.8
|
11.5
|
|
32
|
1-1/4
|
25
|
279
|
279
|
279
|
389
|
420
|
200
|
24.4
|
23.4
|
|
40
|
1-1/2
|
32
|
305
|
305
|
305
|
389
|
420
|
200
|
22.5
|
21.7
|
|
50
|
2
|
38.1
|
368
|
368
|
371
|
498
|
524
|
300
|
45.5
|
43.5
|
|
CLASS2500 PN42.0
|
15
|
1/2
|
10
|
264
|
264
|
264
|
310
|
333
|
180
|
14.3
|
13.3
|
|
20
|
3/4
|
13
|
273
|
273
|
273
|
310
|
333
|
180
|
13.1
|
12.5
|
|
25
|
1
|
19.1
|
308
|
308
|
308
|
310
|
333
|
180
|
12.4
|
11.8
|
|
32
|
1-1/4
|
25
|
349
|
349
|
352.2
|
389
|
420
|
200
|
25.
|
25.5
|
|
40
|
1-1/2
|
32
|
384
|
384
|
387.2
|
389
|
420
|
200
|
24.2
|
24.6
|
|
50
|
2
|
38.1
|
451
|
451
|
454.2
|
498
|
524
|
300
|
49
|
47.2
|
Notes:
1. H means the height when flanged globe valve is fully opened.
2. The above parameters are for your reference only.
Possible Malfunction, Reason and Solution
|
Possible Malfunction
|
Reason
|
Solution
|
|
Leakage Between Disc and Valve Seat Sealing Surface
|
1.Dirty Stuff Attachment on Sealing Surface 2.Wear or Erosion of Sealing Surface 3.Deformation of Disc Caused by Excessive Closing Torsion
|
1.Cleaning Dirty Stuff 2.Regrinding Sealing Surface for Surfacing and Processing 3.Replacing Flanged Globe Valve
|
|
Leakage Between Bolted Bonnet Valve Body and Bonnet Joint
|
1.Uneven Fastening of Connection Studs 2.Damage on Flange Joint Sealing Surface 3.Wear or Invalidity of Gasket
|
1.Refastening Evenly 2.Repairing 3.Repalcing Gasket
|
|
Leakage at Valve Stem Packing Position
|
1.Malcompression of Packing Grand 2.Wear of the Packing 3.Damage of Contact Surface between the Stem and Packing
|
1.Tightening Compression Packing Gland Nut Evenly 2.Increasing Packing Properly 3.Grinding Stem Surface or Replacing Stem
|
|
Inflexible Falling and Rising of Valve Stem
|
1.Too Tight Packing Gland 2.Skewing Packing Gland 3.Clutter in Rotating Parts 4.Damage on Stem and Thread of Valve Stem Nut 5.Stem Bending
|
1.Appropriate Release of Packing Grand 2.Adjusting Packing Gland 3.Removing Clutters and Coating Lubricating Grease 4.Truing Thread or Replacing Stem and Valve Stem Nut 5.Adjusting or Replacing Valve Stem
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