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