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J41H Cast steel globe valve

Update: 2016/12/2??????View:

Brand: ???GK
Type: ???J41H-25C DN50

Introduction

The opening and closing component of J41H cast steel globe valve is a cylindrical valve disc with a flat or conical sealing surface. The valve disc moves linearly along the centerline of the fluid. The national standard globe valve is only suitable for fully open and fully closed, and is generally not used to regulate flow. When customized, it is allowed to be adjusted and throttled. Suitable for cutting off or connecting media on pipelines in various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, and power industries with a nominal pressure of PN1.6~16.0Mpa and a working temperature of -29~550 ℃. Applicable media include water, oil, steam, acidic media, etc. The operation modes include manual, gear transmission, electric, pneumatic, etc.

Working principle of J41H cast steel globe valve
J41H cast steel globe valve belongs to the forced sealing type valve. When the valve is closed, pressure is applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the frictional force between the valve stem and the packing, as well as the thrust generated by the pressure of the medium. The force required to close the valve is greater than the force required to open it, so the diameter of the valve stem should be larger, otherwise the valve stem bending fault may occur. In recent years, with the emergence of self sealing valves, the flow of medium in shut-off valves has shifted from above the valve disc into the valve chamber. Under the pressure of the medium, the force required to close the valve is small, while the force required to open the valve is large, resulting in a corresponding reduction in the diameter of the valve stem. Meanwhile, under the influence of the medium, this type of valve is also relatively tight. The flow direction of the shut-off valve shall be from top to bottom.

Main component materials and performance parameters of J41H cast steel globe valve

Body/Cover/Plate	Stem	Sealing	Gasket	Filler	Temperature℃	Medium
WCB	2Cr13	13Cr ST	1Crl3／Flexible graphite 0Cr18Ni9Ti OCr18Ni12Mo2Ti	Flexible graphite SFB-260 SFP-260	≤425	Water, steam, oil products
WC1	38CrMoAI 25Cr2MoV				≤450
WC6					≤540
WC9					≤570
ZGCr5Mo					≤540
ZG1Cr18Ni9Ti	1Cr18Ni9Ti				≤200	Nitric acid
ZGCr18Ni12Mo2Ti	1C18Ni12Mo2Ti				≤200	Acetic acid

Main appearance and connection dimensions of J41H cast steel globe valve

J41H鑄鋼截止閥結(jié)構(gòu)圖

1.6MPa	DN	L	D	D1	D2	b	n-Φd	H	D0
RF J41H J41Y J41W J41F J41N 16C 16P 16R 16I	10	130	90	60	40	14	4-Φ14	198	120
	15	130	95	65	45	14	4-Φ14	218	120
	20	150	105	75	55	14	4-Φ14	258	140
	25	160	115	85	65	14	4-Φ14	275	140
	32	180	135	100	78	16	4-Φ18	280	160
	40	200	145	110	85	16	4-Φ18	330	180
	50	230	160	125	100	16	4-Φ18	350	200
	65	290	180	145	120	18	4-Φ18	370	280
	80	310	195	160	135	20	8-Φ18	400	280
	100	350	215	180	155	20	8-Φ18	415	320
	125	400	245	210	185	22	8-Φ18	460	360
	150	480	280	240	210	24	8-Φ23	510	450
	200	600	335	295	265	26	12-Φ23	710	500
	250	650	405	335	320	30	12-Φ25	786	550
	300	750	460	410	375	30	12-Φ25	925	600

2.5MPa	DN	L	D	D1	D2	b	n-Φd	H	D0
RF J41H J41Y J41W J41F J41N 25C 25P 25R 25I	10	130	90	60	40	16	4-Φ14	198	120
	15	130	95	65	45	16	4-Φ14	218	120
	20	150	105	75	55	16	4-Φ14	258	140
	25	160	115	85	65	16	4-Φ14	275	140
	32	180	135	100	78	18	4-Φ18	280	160
	40	200	145	110	85	18	4-Φ18	330	180
	50	230	160	125	100	20	4-Φ18	350	200
	65	290	180	145	125	22	8-Φ18	400	280
	80	310	195	160	135	22	8-Φ18	355	280
	100	350	230	190	160	24	8-Φ23	415	320
	125	400	270	220	188	28	8-Φ25	460	360
	150	480	300	250	218	30	8-Φ25	510	450
	200	600	360	310	278	34	12-Φ25	710	500
	250	622	425	370	332	36	12-Φ30	786	550
	300	698	485	430	390	40	16-Φ30	925	600