SINGLE-SEAT PNEUMATIC CONTROL VALVE

group name: CONTROL VALVE

Min Order: 1 piece

brand name: KRV

model: DN20-DN250

Nearest port for product export: Tianjin, Shanghai, Qingdao, Dalian

Delivery clauses under the trade mode: FOB, CFR, CIF, EXW

Acceptable payment methods: T/T, L/C, Credit Card, Westem Union, Cash

update time: Tue, 11 May 2021 17:26:38 GMT

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Packging & Delivery

Min Order1 piece

Briefing

SINGLE-SEAT PNEUMATIC CONTROL VALVE

Detailed

Product features

Zjhp fine and small pneumatic single seat control valve is composed of pneumatic multi spring diaphragm actuator and low flow resistance single seat valve. The new actuator is low in height, light in weight, easy to install, compact in structure, unobstructed in flow passage, large in flow coefficient, reliable in action, small in seat leakage, accurate in flow characteristic and wide in adjustable range.

Main performance specifications

Main technical parameters of regulating mechanism

Nominal diameter（mm）			20				25	40		50	65	80	100	150		200
Seat diameter（mm）			10	12	15	20	25	32	40	50	65	80	100	125	150	200
Rated flow coefficient Kv		straight line	1.8	2.8	4.4	6.9	11	17.6	27.5	44	69	110	176	275	440	690
		Equal percentage	1.6	2.5	4	6.3	10	16	25	40	63	100	160	250	400	630
Nominal pressure（MPa）			0.6 1.6 4.0 6.4
trip mm			10				16	25			40			60
Flow characteristics			Straight line, equal percentage
Medium temperature ℃			-15~200、-40~250（Normal temperature type）、230~450（Medium temperature type）
Flange size			Cast iron flange size according to JB/T78，Cast steel flange size according to JB/T79
flange type			Flange sealing surface type JB/T77，The cast iron flange is smooth type and the cast steel flange is concave type
body material	PN(MPa)	0.6,1.6	WCB(ZG230-450)
		4.0,6.4	WCB(ZG230-450)，ZG1Cr18Ni9Ti、ZG0Cr18Ni12Mo2Ti
Material of valve core			1Cr18Ni9、0Cr18Ni12Mo2Ti
Type of upper valve cover			Common type (constant temperature type),hot plate type (medium temperature type)
Adjustable ratio R			50:1
Air supply connector			M16*1.5

Note: ANSI, API, JIS and other foreign flange standard products can be provided for users, and the structural length can also be determined according to the needs of users.

Main technical parameters of actuator

model	ZHA/ZHB-22	ZHA/ZHB-23	ZHA/ZHB-34	ZHA/ZHB-45
Effective area cm²	350	350	560	900
trip mm	16	25	40	60
Spring range KPa	20~100（标准）；40~200；80~240；20~60;60~100

Drawing of pneumatic single seat control valve

Main connecting dimensions of pneumatic single seat control valve

Nominal diameter （DN）	L			H		H1				weight（Kg）		ΦA
Nominal diameter （DN）	PN6/16	PN40	PN64	ordinary	high temperature	PN6	PN16	PN40	PN64	PN6/16	PN40/64	ΦA
20	184	194	206	398	548	45	52		65	19	23	285
25	185	197	210	410	560	50	57		70	20	24
32	200	210	220	418	578	56	70		78	24	31
40	222	235	251	455	620	65	75		85	26	35
50	254	267	286	475	627	70	82		90	30	40
65	276	292	311	610	790	80	92		102	47	66	360
80	298	317	337	622	807	95	100		107	55	78
100	352	368	394	640	850	105	110	117	125	65	99
125	410	425	440	864	1122	120	125	135	148	120	140
150	451	473	508	870	1130	132	142	150	175	130	160	470
200	600	620	650	890	1150	160	170	187	207	175	250	470
250	650	670	690	1203	1523	187	202	225	235	350	470	580
300	740	770	800	1234	1554	220	230	257	265	500	660	580

Material of main parts of pneumatic single seat control valve

Part name	Material Science	temperature range
Body / bonnet	HT200	-15~200℃
	WCB	-20~425℃
	ZG1Cr18Ni9Ti	-40~550℃
	ZG0Cr18Ni12Mo2Ti	-40~600℃
Spool / seat	1Cr18Ni9	-40~550℃
Spool / seat	0Cr18Ni12Mo2Ti	-40~550℃
filler	teflon PTFE	-40~200℃
diaphragm	NBR clip reinforced polyester fabric
Compression spring	60Si2Mn
Membranous cap	A3