Throttle Drain Vent Sleeve Type Globe Valve

• Customization: Available
• Media: Wog
• Temperature: High Temperature
• Model NO.: GAFJ41YF
• Material: Alloy Steel Wc6, Wc9
• Connection Form: Flange
• Pressure: High Temperature
• Actuator: Manual
• Seal Surface: Metal Sealing
• Thread Position of Valve Rod: OS&Y
• Usage: Regulation
• Application: Industrial Usage
• Transport Package: Plywood Case
• Trademark: GOOLE, OEM, ODM
• Origin: China(Mainland)
• HS Code: 8481804090

Product Description

Throttle Drain Vent Sleeve Type Globe Valve

Product Description

Throttle globe vent valves are widely used as closed-circuit devices in pipelines for petroleum, natural gas, coal gas, liquefied petroleum gas, refining, airports, chemical industries, oil and gas storage and transportation, etc.

Working Principle

1. Normally closed state: The hard seal of the valve disc is pressed against the protrusion of the valve seat, forming a hard seal. At the same time, the soft seal embedded in the valve disc is tightly pressed against the end face of the valve seat, forming a second seal. The dual quality sealing structure ensures zero leakage of the valve. Moreover, due to the balance hole opened in the valve disc, the valve disc receives less force when closing and opening, and also has less torque when opening and closing the valve.
2. Slow pressure state: When the bottom end of the valve disc leaves the sealing surface of the valve seat, due to the proximity of the bottom end surface of the valve disc to the bottom edge of the cage shaped sleeve opening, a seal is formed between the valve disc and the inner diameter of the cage shaped sleeve. And there is no direct release of pressure, thus achieving a mitigating effect.
3. Throttle state: The carbonyl at the bottom of the valve disc leaves the valve seat and further opens, forming a first stage throttling at the small flow head. High speed fluid flows directly to the small valve disc after slow pressure throttling. As the edge of the valve sleeve window is the final throttling surface, when high-pressure medium directly flushes the throttling channel, eddy currents are generated at the bottom of the valve disc due to the change of medium direction, reducing the direct flushing of the medium on the valve disc. Therefore, the valve seat seal also avoids direct flushing of the medium. At the same time, because the sealing surface of the valve disc is conical, it can blow away dirt and impurities on the sealing surface of the valve seat, protect the sealing surface, and extend the service life of the valve.
4. Fully open state: When the valve disc is fully open, the entire valve is in a fully vented state, reducing the resistance of the fluid in the cold valve, shortening the venting time, and improving the venting effect of the valve.

Application

1. This valve is a new type of throttling, shut-off, and venting product. It adopts cage shaped labyrinth throttling, with multi-stage throttling effect, obvious throttling effect, reliable sealing, and convenient operation and maintenance.
2. The valve adopts dual sealing (hard and soft sealing) to ensure reliable sealing. The hard alloy cover can be more resistant to air flow erosion and wear, and the dual sealing can achieve zero leakage under high-pressure gas medium conditions. The valve has a long service life.
3. The sealing surface of the valve seat adopts a tapered seal, which is conducive to cleaning the dirt attached to the sealing surface of the valve itself.
4. The valve disc of the valve is equipped with a balance hole and a piston type seal, ensuring stable operation under full pressure difference conditions for opening/closing, with light and flexible opening and small opening/closing torque.
5. The throttling cut-off vent valve and the double acting throttling valve have both throttling and shut-off (zero leakage sealing) functions. The throttling part is separated from the sealing surface to reduce the erosion of the seal by the airflow.
6. The double acting throttling globe valve also has multi-stage throttling function, with a large throttling pressure difference, which can be applied to throttling and shut-off under high pressure.
7. The packing adopts a V-shaped packing structure with self sealing ability, which does not require adjustment and is extremely lightweight to open and close. There is an auxiliary sealing grease injection structure at the packing box, which ensures reliable sealing performance of the valve packing.
8. This valve can be repaired online, and the pipeline can replace a series of vulnerable parts such as packing under pressure.
9. This valve is equipped with a large drain hole at the bottom of the valve, which should be opened if necessary to clean the dirt inside the valve.

Product Parameters

 

DN	L	α	H	DO	PNl.6/MPa		PN2.5/MPa
					D	D1	D	D1
50	250	37^o30'	334	250	58	50	64	4g
65	270	37^o30'	439	250	75	65	82	67
80	280	37^o30'	495	300	91	79	95	77
100	300	37^o30'	575	350	11O	97	117	101
125	325	37^o30'	587	350	136	121	144	126
150	350	37^o30'	607	350	163	146	172	158
200	400	37^o30'	740	400	223	202	223	202
250	450	37^o30'	863	400	278	254	278	254
300	500	37^o30'	990	400	330	305	330	305
350	550	37^o30'	1137	500	382	352	382	352
400	600	37^o30'	1523	500	432	399	432	39g
450	650	37^o30'	1618	600	485	451	485	451
500	700	37^o30'	1657	600	535	501	535	499
600	800	37^o30'	1746	700	636	601	636	599

 

DN	L	D	α	PN4.0MPa			PN6.4/MPa			PN10.0MPa
				D1	H	D0	D1	H	DO	D1	H	D0
50	250	64	37^o30'	49	345	300	50	350	300	49	350	300
65	270	83	37^o30'	67	441	300	66	447	300	64	447	300
80	280	96	37^o30'	79	495	350	77	499	350	75	499	350
100	300	117	37^o30'	101	575	350	99	582	400	87	582	400
125	325	144	37^o30'	126	587	400	129	590	400	125	590	400
150	350	172	37^o30'	152	607	400	150	611	450	145	611	450
200	400	223	37^o30'	200	740	450	198	745	550	190	747	550
250	450	278	37^o30'	252	863	550	246	867	650	236	869	650
300	500	330	37^o30'	302	1008	650	294	1008	750	282	1013	750
350	550	382	37^o30'	350	1142	750	342	1148	800	334	1148	850
400	650	432	37^o30'	397	1527	850	387	1531	900	377	1533	950

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