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Butt Welded Forged Steel Globe Valve

Description

Kerui Valve is a main manufacturer and supplier of forged steel valves (check valve, globe valve, gate valve, etc.). Butt weld forged steel globe valve is a valve with closure member (disc) moving along with the center line with valve seat. It is mainly composed of valve body, disc, shaft pin and stem. Since it has relative short opening and closing stroke, this valve is very suitable for cutting off and regulating medium flow.

Applications of Globe Valve with Butt Weld End

Our butt weld forged steel globe valve is widely applied on tap water, sewage, building, petroleum, chemical, food, medicine, textile, electricity, ship, metallurgy, energy and other pipeline systems, such as
1. High temperature and pressure petrochemical pipelines systems in thermal power plants and nuclear power stations
2. Pipelines with small requirement on flow resistance (pressure loss)
3. Low requirement on regulating precision and small diameter (nominal diameter ≤ 50 mm) pipelines
4. Chemical fertilizer production line
5. Alumina production process (easy-coking pipeline in desilication workshop)
6. Water and heat supply engineering in urban construction

Features of Globe Valve with Butt Weld End

1. Butt weld forged steel globe valve is much easier than gate valve in structure, manufacturing and maintenance.
2. Two times shot blasting makes exquisite outward appearance of this forged steel valve.
3. Precision casting technology is adopted to manufacture valve body.
4. CNC processing is applied on valve disc.
5. When opened or closed, there is no relative sliding between valve body and disc.
6. Butt weld forged steel globe valve is lower but longer than gate valve.
7. Since medium channel twists and turns in valve body, the fluid resistance is big.
8. It needs small torsion to open the valve.
9. This globe valve is featured by fine sealing performance and long service time.
10. Friction is small between sealing surfaces.
11. All our products have passed CE and JB/T9092 certification.
12. 18 months warranty and lifetime technology service are offered for our products.
13. The medium in this forged steel valve can only flow in one direction and the flowing direction can not be changed when butt weld forged steel globe valve is in operation.

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 Globe Valve with Butt Weld End


Technical Specification ASME/API/BS GB/JB
Design Standard 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

Material List for Main Parts Butt Weld Forged Steel Globe Valve


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 Handwheel A197 or A47-32510

Main Dimensions & Weight


Pressure Size Main Dimension of Butt Weld Forged Steel Valve 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:
H means the height when valve is fully opened.
The size chart of butt weld forged steel globe valve is just for reference.

Malfunction 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 this Butt Weld Forged Steel 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