Pneumatic converging 3-way control valve

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Wechat:17717520739
Email：info@shxvalve.com

Address: NO.720, Suide Road, Jiading District,Shanghai, China.

Model：

Pneumatic 3-way control valve Body type:	3-way casting globe type
Spool type:	3-way double seat spool
Nominal size:	DN20~300 NPS 3/4〞~ 12〞
Nominal pressure:	PN16 ~ 100、 CLASS 150LB ~ 600LB
Connection: flange:	FF、RF、MF、RTJ
Welding:	SW、BW
Flange dimension:	According to to IEC 60534
Pneumatic 3-way control valve Bonnet type:	Ⅰ:standard type（-20℃~230℃） Ⅱ:Radiator type: （-45℃~ high than 230℃ occasion） Ⅲ:Low temperature extended type（-196℃~ -45℃） Ⅳ:Bellow seal type Ⅴ:Warm insulation Jacket type
Packing:	V type PFTE packing, flex. graphite packing, etc.
Gasket:	Metal graphite packing
Control valve Actuator:	Pneumatic:multi-spring diaphragm actuator, piston type actuator.

Component name	Control Valve Material
Body/Bonnet	WCB/WCC/WC6/CF8/CF8M/CF3M
Valve spool/Seat	304/316/316L(overlaying stellite alloy)
Packing	Normal:-196～150℃ is PTFE,RTFE,>230℃ is flexible graphite
Bellow	304,316,316L
Gasket	Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
Stem	2Cr13/17-4PH/304/316/316L
Diaphragm Cover	Normal:Q235,Special:304
Diaphragm	NBR with reinforced polyester fabric
Spring	Normal:60Si2Mn,Special:50CrVa

3-way control valve Flow characteristic	Linear, percentage
Allowable range	30: 1
Rated Cv value	Percentage / linear CV8.5~1280
Pneumatic 3-way control valve Allowable leakage	Metal seal: IV grade（0.01% rated capacity） Leakage standard: GB/T 4213
Pneumatic 3-way control valve Performance
Intrinsic error(%)		±1.5
Return difference(%)		≤1.5
Dead zone(%)		≤0.6
Difference from beginning to end point(%)		±2.5
Rated travel difference(%)		≤2.5

Special test	Material penetration flaw detection (PT), radiator test (RT), flow characteristic test, low temperature test.
Special treatment	Trim nitrogen treatment, seat hard alloy treatment.
Special rinse	Degreasing and dehydration treatment
Special condition	Special piping or connection, vacuum condition, S.S fastener, special coating.
Special dimension	Customized face to face length or dimension
Test and inspection	Third party test report

Pneumatic 3-way control valve Type\ Method	Pneumatic diaphragm actuator
	ZH23～ZH56
	Multi-spring type
Usage	Regulating type, ON-OFF type
Air supply pressure or Power supply voltage	Air supply pressure (Spring range) 140（20～100）Kpa G 240 (40～200) Kpa G 280 (80～240) Kpa G
Connector	Air pipe connector: RC1/4
Direct action	Pressure increase, stem descend, valve close.
Reaction	Pressure increase, stem ascend, valve open.
Input signal	40～20mA.DC（with positioner）
Lag	≤1%FS（with positioner）
Linear type	2%FS（with positioner）
Environmental temperature	-10℃～+70℃
Pneumatic 3-way control valve Accessories	E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch Non-standard accessories, need special customized notes.

Seat diameter（mm）		25	32	40	50	65	80	100		125	150	200	250	300
Rated flow coefficient, CV		8.5	13	21	34	53	85	135		210	340	535	800	1280
Nominal size	Travel	Option flow coefficient Cv（★standard ●recommended）
DN25	16 mm	★
DN32	25 mm		★
DN40			●	★
DN50			●	●	★
DN65	40mm					★
DN80						●	★
DN100						●	●	★
DN125	60mm									★
DN150										●	★
DN200										●	●	★
DN250	100mm										●	●	★
DN300	100mm											●	●	★
Pneumatic actuator Diaphragm area, Ae (cm2)		ZHA/B-23				ZHA/B-34			ZHA/B-45				ZHA/B-56
Pneumatic actuator Diaphragm area, Ae (cm2)		350				560			900				1600
Action	Spring range	pneumatic 3-way control valve Metal sealing allowable pressure difference（MPa）
Air open	20-100KPa	0.7	0.44	0.28	0.18	0.17	0.11	0.07		0.07	0.05	0.03	0.05	0.03
	40-200 KPa	2.14	1.31	0.84	0.53	0.51	0.33	0.21		0.22	0.15	0.09	0.11	0.07
	80-240 KPa	4.99	3.05	1.95	1.25	1.18	0.78	0.5		0.51	0.36	0.21	0.21	0.15
Air close	20-100KPa	2.14	0.87	0.56	0.35	0.34	0.22	0.14		0.15	0.1	0.06	0.05	0.03
	40-200 KPa	6.4	5.86	3.64	2.3	2.21	1.43	0.91		0.95	0.66	0.37	0.11	0.07
	80-240 KPa	6.4	6.4	5.04	3.18	3.06	1.98	1.26		1.32	0.92	0.52	0.21	0.15

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