Vacuum shut-off valve J61H

DESCRIPTION

【stop valve】Also known as a cut-off valve, it is the most widely used type of valve! It is widely popular because①The friction between the sealing surfaces is small during the opening and closing process.②More durable.③The opening height is not large.④Easy to manufacture.⑤Easy maintenance.⑥Not only suitable for medium and low voltage, but also for high voltage. The closing principle of the vacuum isolation globe valve is to rely on the pressure of the valve stem to tightly fit the sealing surface of the valve disc and the sealing surface of the valve seat, preventing the flow of the medium. The shut-off valve only allows one-way flow of the medium and has directionality during installation. Structure of globe valveThe length is greater than that of a gate valve, and the fluid resistance is high. During long-term operation, the sealing reliability is not strong.

Overview of vacuum isolation globe valve:

flangeVacuum isolation shut-off valveApplicable to nominal pressurePN4.0～10.0MpaWorking temperature≤200℃Cut off or connect the medium in the return water condensation system pipeline of the thermal power plant. Applicable media include water, steam, etc. The sealing surface has low friction during movement, easy opening and closing, and automatic compensation for sealing surface wear. The structure is simple, compact, easy to maintain, and has a long service life. The valve cover packing chamber is equipped with a vacuum sealing structure, which has a self expanding and compressing effect, and is sealed with high-strength expansion materials, completely isolating the system from the atmosphere and having good system airtightness. This series of valves has two connection forms: flange and welding, and there are two driving modes: manual and electric. This valve is suitable for operating temperature≤425℃and≤550℃As an opening and closing device on pipelines with working media such as water, steam, or air; Especially suitable for steam turbine condensation and vacuum negative pressure systems in thermal power plants, it plays a role in vacuum isolation and sealing.

Product Structure Features:
1.Product byJB/T3595Standard design and manufacturing to meet the requirements for supporting the use of power station equipment.
2.A vacuum sealed structure packing chamber has been designed to ensure reliable vacuum isolation.
3.The valve stem has undergone quenching and surface nitriding treatment, providing excellent corrosion resistance, abrasion resistance, and wear resistance.
4.The flange gasket is made of composite material, with a large expansion coefficient and good air tightness performance, ensuring reliable isolation between the system and the atmosphere.
5.The reverse seal is made by connecting the sealing seat with stainless steel threads or welding austenitic stainless steel on the body, ensuring reliable reverse sealing. Packing replacement and maintenance can be carried out without stopping the machine, which is convenient, fast and does not affect the operation of the system.
Material Description of Main Components:

valve body	25、WCB	Cr5Mo
valve cover	25、WCB	Cr5Mo
bracket	25、WCB	Cr5Mo
Valve flap	2Cr13、WCB	Cr5Mo
valve stem	2Cr13	38CrMoAL、25Cr2MoV
valve seat	25、304	304
Sealing ring	Expanded flexible graphite
filler	Expanded flexible graphite
stem nut	ZCuA110Fe3

Nominal Diameter DN(mm)	nominal pressurePN(MPa)	Main appearance and connection dimensions(mm)
Nominal Diameter DN(mm)	nominal pressurePN(MPa)	L	Hhand	D	Do	D1	L1	α	W
10	4.0	130	245	36	11	18.4	10		120
15		130	245	36	16	22.5	10		120
20		150	265	44	21	28.5	11		160
25		160	270	48	26	34.5	12		200
32		180	285	48	34			37.5°	200
40		200	320	55	40			37.5°	240
50		230	365	64	48			37.5°	320
65		290	410	82	66			37.5°	300
80		310	430	95	78			37.5°	3000
100		35	470	117	100			37.5°	350
125		400	500	143	126			37.5°	350
150		480	533	167	150			37.5°	400
10	6.4	130	245	36	10	18.4	10		120
15		130	245	36	15	22.5	10		120
20		150	265	44	20	28.5	11		160
25		160	270	48	25	34.5	12		200
32		180	280	48	33			37.5°	200
40		200	320	55	39			37.5°	240
50		230	365	64	48			37.5°	320
65		290	410	82	65			37.5°	320
80		310	430	95	76			37.5°	360
100		350	470	117	98			37.5°	400
125		480	500	143	123			37.5°	400
150		480	533	167	148			37.5°	500
10	10.0	130	245	36	10	18.4	10		120
15		130	245	36	14	22.5	10		120
20		150	265	44	20	28.5	11		160
25		160	270	48	25	34.5	12		200
32		180	285	48	32			37.5°	200
40		200	320	55	38			37.5°	240
50		230	355	64	48			37.5°	320
65		290	410	82	63			37.5°	320
80		310	430	95	74			37.5°	360
100		350	470	117	97			37.5°	400
125		400	500	143	123			37.5°	400
150		480	533	167	148			37.5°	500

Vacuum shut-off valve J61H

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