Sinopec Shanghai Valve Manufzcturing Co.,LTD.

Home > Products > Oil valve > Throttle stop venting valveFJ41、FJL41、CJ41

Description Material Performance Product Size Specifications

Closed circuit device of pipe throttle stop venting valve is widely used in petroleum, natural gas, coal gas, liquefied petroleum gas engine oil refinery, airport, chemical, oil and gas storage and transportation and so on.
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.

Part name	Valve body, valve cover	Valve	The stem	valve seat	Stem nut	Seal ring	filler	Seal finger
Base name	WCB	Alloy steel (special treatment)	Stainless steel	Alloy steel (special treatment)	Aluminum bronze	Filled PTFE	Expanded graphite filled PTFE	Oil resistant sealing grease
Anti sulfur type			Sulfur resistant stainless steel					Anti sulfur sealing grease

Pressure class	Pressure test at room temperature（MPa）				Applicable temperature℃				Applicable medium
Pressure class	Seal up	Upper seal	housing	Gas seal	"G" type	"D" type	Ordinary type	Anti sulfur type	Basic type
Nominal pressurePN（MPa）	1.6	1.76	1.76	2.4	0.6	-29～250	-46～121	-29～121	Media containing H 2 S and Co 2 > 500Mg/m 3	Petroleum, natural gas, water, etc.
	2.5	2.75	2.75	3.75	0.6
	4.0	4.4	4.4	6.0	0.6
	6.4	7.04	7.04	9.6	0.6
	10.0	11.0	11.0	15.0	0.6
	16.0	17.6	17.6	24.0	0.6

Nominal pressurePN(MPa)	size(mm)
Nominal pressurePN(MPa)	DN(mm)	25	40	50	80	100	150	200	250
1.6	L	216	230	230	310	350	480	600	730
	H	243	265	346	409	484	521	594	621
	H1	86	108	115	146	163	202	292	355
	D0	180	250	250	300	300	350	350	400
	weight(Kg)	17	24	27	52	60	125	165	285
2.5	L	216	230	230	310	350	480	600	730
	H	243	265	346	409	433	521	594	621
	H1	86	108	115	146	163	202	292	355
	D0	180	250	250	300	300	350	350	400
	weight(Kg)	17	24	27	55	66	140	180	310
4.0	L	216	230	230	310	350	480	600	730
	H	243	265	346	409	433	521	594	621
	H1	86	108	115	146	163	202	292	355
	D0	180	250	250	300	300	350	350	400
	weight(Kg)	20	29	32	67	80	168	215	372
6.4	L	216	230	230	310	350	480	600	730
	H	243	265	346	409	433	521	594	621
	H1	86	108	115	146	163	202	292	355
	D0	180	250	250	300	300	350	350	400
	weight(Kg)	20	29	32	67	80	168	215	372
10.0	L	230	20	300	380	430	559	660	787
	H	245	265	287	409	433	531	709	817
	H1	78	106	110	152	169	225	321	399
	D0	200	250	300	350	250	400	500	500
	weight(Kg)	29	42	55	95	120	240	310	530
16.0	L	230	260	300	390	450
	H	215	265	237	414	440
	H1	78	105	110	155	175
	D0	200	250	300	350	350
	weight(Kg)	35	50	65	116	145

1, normally closed: valve seal for pressure in the seat on the boss, to form a hard seal, soft and embedded on the valve flap and the valve seat sealing surface is pressed to form second sealing, double sealing structure ensures zero leakage of the valve, then the valve clack opened balance hole in the closing and opening of the valve, when the valve is a small force, the valve open and closed with a small torque.
2, slow pressure state: the bottom of the valve seat to leave the valve seat sealing surface, due to the end of the valve flap close to the cage shaped set on the bottom edge of the bottom, this time the valve and the cage shaped sleeve inner diameter to form a seal. Without direct vent relief, so as to achieve the relaxation effect.
3, throttle state: valve bottom carbonyl left seat, further open, at the head of a throttle throttle, high-speed flow after the slow pressure after throttling flow directly to the small valve, because the valve cover the edge of the window is the ultimate throttle, high pressure direct scouring medium throttle valve at the bottom of the channel, due to change of medium eddy current, reduce the direct scouring medium valve seat seal, so as to avoid direct scouring medium, at the same time as the valve sealing surface is tapered, can blow the dirt and impurities and the valve seat sealing surface of the sealing surface protection, so as to prolong the service life of the valve.
4, fully open state: valve in the fully open state, the valve in full emptying, less resistance in fluid in the popular, shorten the venting time, improve the venting valve effect.

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