Nkj41h Power Plant Steam Turbine Flanged Vacuum Globe Valve

Product Description

NKJ41H Power Plant Steam Turbine Flanged Vacuum Globe Valve

Product Description

NKJ41H Power Plant Steam Turbine Flanged Vacuum Globe Valve
NKJ41H Vacuum Flanged Globe Valve Overview:
The main body of the vacuum isolation shut-off valve adopts a cast-forging structure, and has a parallel double-sealed pair and a half-forced two-way seal, and the sealing surface in-position movement and the wedge-shaped wedge wedge movement are step-by-step action to realize zero leakage. The friction coefficient between the sealing surfaces is small and the opening and closing are convenient. Moreover, the wear of the sealing surface has an automatic compensation function. The structure is simple, compact, easy to repair and long service life. The bonnet filling chamber is provided with a vacuum sealing mechanism, which has a self-expanding deposit tightly, and each connecting surface is sealed with a high-strength expanding material to isolate the system from the atmosphere and has a good vacuum sealing performance. This series of valve connection is divided into flange connection and welding connection. The drive mode is manual and electric. This series of valves is suitable for operating temperature ≤ 425 °C and ≤ 550 °C, working medium for water, air, steam pipeline, as a starting and closing device. It is especially suitable for the steam turbine condensation and vacuum negative pressure systems in thermal power plants and plays a role in vacuum sealing and isolation.

Product Features

NKJ41H Power Plant Steam Turbine Flanged Vacuum Globe Valve

NKJ41H vacuum globe valve product structure features:
1. The product is designed and manufactured according to the JB/T3595 standard, which meets the requirements for supporting the use of power station equipment.
2. The vacuum sealed packing room is designed to isolate the vacuum reliably.
3. The valve stem is tempered and nitrided on the surface to provide good corrosion resistance, scratch resistance and wear resistance.
4. The flange gasket is made of composite material, which has a large expansion coefficient and good airtight performance, ensuring the system and the atmosphere are isolated and reliable.
5. Inverted seal is made of stainless steel threaded connection seal base or body austenitic stainless steel, reliable sealing. Filler replacement and maintenance can be performed without stopping the machine. It is convenient and quick to not affect the system operation.

Product Details

NKJ41H Power Plant Steam Turbine Flanged Vacuum Globe Valve

Valve Body 25, WCB Cr5Mo
Valve cover 25, WCB Cr5Mo
Support 25, WCB Cr5Mo
Valve flap 2Cr13, WCB Cr5Mo
Valve stem 2Cr13 38CrMoAL, 25Cr2MoV
Valve seat 25,304 304
Seal ring Expanded flexible graphite
Filling Expanded Flexible Graphite
Stem nut ZCuA110Fe3

NK/J41H-25 MAIN DIMENSION AND WEIGHT

DN(mm)	DIMENSION(mm)								WEIGHT(kg)
	L	D	D1	D2	b	Z-φd	H	D0
10	130	90	60	40	16	4-14	272	120	6
15	130	95	65	45	16	4-14	272	120	6
20	150	105	75	55	16	4-14	280	120	6
25	160	115	85	65	16	4-14	332	160	10
32	190	135	100	78	18	4-18	342	160	11
40	200	145	110	85	18	4-18	395	200	17
50	230	160	125	100	20	4-18	431	240	24
65	290	180	145	120	22	8-18	457	280	33
80	310	195	160	135	22	8-18	505	320	47
100	350	230	190	160	24	8-23	549	360	62
125	400	270	220	188	28	8-25	621	400	96
150	480	300	250	218	30	8-25	703	400	128
200	600	360	310	278	34	12-25	828	400	168

NK/J41H-40 MAIN DIMENSION AND WEIGHT

DN(mm)		DIMENSION(mm)									WEIGHT(kg)
	L		D	D1	D2	b	Z-φd	D6	H	D0
10	130		90	60	40	16	4-14	35	272	120		6
15	130		95	65	45	16	4-14	40	272	120		7
20	150		105	75	55	16	4-14	51	280	120		8
25	160		115	85	65	16	4-14	58	332	160		10
32	190		135	100	78	18	4-18	66	342	160		11
40	200		145	110	85	18	4-18	76	395	200		17
50	230		160	125	100	20	4-18	88	437	246		25
65	290		180	145	120	22	8-18	110	457	280		34
80	310		195	160	135	22	8-18	121	505	320		47
100	350		230	190	160	24	8-23	150	549	360		62
125	400		270	220	188	28	8-25	176	621	400		96
150	480		300	250	218	30	8-25	204	705	400		128
200	600		360	310	278	34	12-25

 

Product Parameters

NKJ41H Power Plant Steam Turbine Flanged Vacuum Globe Valve
NKJ41H Vacuum Flanged Globe Valve

Product Name	Vacuum flange valve
Product Model	NKJ41H
Product caliber	DN10-150
Product pressure	1.0-10.0Mpa
Connection form	flange, welding two
Product materia	cast steel (forged steel A105), stainless steel (F304), alloy steel (F11, F22), etc
Drive mode	manual, electric

NKJ41H Power Plant Steam Turbine Flanged Vacuum Globe Valve
NKJ41H vacuum globe valve technical parameters:
Vacuum isolation valve is suitable for medium pressure of PN4.0~10.0Mpa nominal pressure and operating temperature ≤200°C in the backwater condensing system of thermal power station. Suitable media: water, steam and so on. The sealing surface has a small frictional force, easy opening and closing, and automatic compensation for the wear of the sealing surface. The structure is simple, compact, easy to repair and long service life. The bonnet filling chamber is provided with a vacuum sealing structure, which has a self-expanding and compacting effect, and the sealing is sealed with a high-strength expansion material, so that the system is completely isolated from the atmosphere, and has a good system tightness.

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