Threaded Forged Steel Globe Valve

Description

Threaded 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. The stem axis of this threaded globe valve is vertical to sealing surface of valve seat. With short opening and closing stroke and reliable cutting off performance, this forged steel valve is widely used for cutting off and regulating medium flow.

Application

Our threaded 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.

Advantages of Threaded Globe Valve

1. Globe valve is much easier than gate valve in structure, manufacturing and maintenance.
2. It needs small torsion to open the forged steel valve.
3. Threaded forged steel globe valve is featured by fine sealing performance and long service time.
4. Friction is small between sealing surfaces.
5. All our products have passed CE and JB/T9092 certification.
6. 18 months warranty and lifetime technology service are offered for our products.

Features

1. Precision casting technology is adopted to manufacture valve body.
2. Two times shot blasting makes exquisite outward appearance of the threaded globe valve.
3. CNC processing is applied on valve disc.
4. When opened or closed, there is no relative sliding between valve body and disc.
5. Globe valve is lower but longer than gate valve.
6. Since medium channel twists and turns in valve body, the fluid resistance is big.
7. The medium in threaded forged steel globe valve can only flow in one direction and the flowing direction can not be changed when the forged steel valve is in operation.
8. The disc often endures erosion when fully opened.

Classifications of Threaded 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: CLASS900-1500 PN16.0~26.0

1. Bolted Bonnet/Welded Bonnet Pressure Sealed Bonnet
2. Full Port
3. General or Needle Type Disc
4. Treaded Ends or SW Ends

Technical Specification of Threaded Globe Valve

Technical Specification	ASME/API/BS	GB/JB
Design Standard	BS5352	GB/T7746
Pressure-Temperature Rating	ASME B16.34	GB/T12224
Face-Face	Factory Standard	GB/T7746
Socket-Welded Ends	ASME B16.11	GB/T1751
Threaded Ends	ASME B1.20.1	GB/T306
Inspection & Test	API598	JB/T9092

Material List for Main Parts of Threaded 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 of Threaded Globe Valve

Pressure	Size		Main Dimension of Forged Steel Valve								Weight(kg)
	mm	in.	D		L		H		W
			BB/WB	PB	BB/WB	PB	BB/WB	PB	BB/WB	PB	WB	PB
CLASS900 PN16.0	8	1/4	7	-	111	-	207	-	100	-	2.4	-
	10	3/8	10	-	111	-	207	-	100	-	2.2	-
	15	1/2	13	13	111	140	207	207	100	125	2.0	11.2
	20	3/4	18	18	130	140	240	207	125	125	3.8	10.5
	25	1	24	24	152	140	258	240	160	160	4.2	10.1
	32	1-1/4	29	29	172	178	290	258	160	160	8.0	21.0
	40	1-1/2	36.5	36.5	220	178	337	290	180	180	13.2	19.6
	50	2	46.5	46.5	235	216	354	337	240	240	16.8	40.4
CLASS1500 PN26.0	8	1/4	7	-	111	-	207	-	100	-	2.4	-
	10	3/8	10	-	111	-	207	-	100	-	2.2	-
	15	1/2	13	13	111	140	207	207	100	125	2.0	11.2
	20	3/4	18	18	130	140	240	207	125	125	3.8	10.5
	25	1	24	24	152	140	258	240	160	160	4.2	10.1
	32	1-1/4	29	29	172	178	290	258	160	160	8.0	21.0
	40	1-1/2	36.5	36.5	220	178	337	290	180	180	13.2	19.6
	50	2	46.5	46.5	235	216	354	337	240	240	16.8	40.4

Note: H means the height when valve is fully opened.

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 the Forged Steel Valve
Leakage Between Bolted Bonnet Valve Body and Bonnet Joint	1.Uneven Fastening of Connection Studs 2.Damage on 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