China Hot-selling Pneumatic Directional Control Valve Types - cryogenic pneumatic control valve – Hoyee factory and manufacturers

Hot-selling Pneumatic Directional Control Valve Types - cryogenic pneumatic control valve – Hoyee

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Hot-selling Pneumatic Directional Control Valve Types - cryogenic pneumatic control valve – Hoyee Detail:

Technical specification

2.1Date sheet

Pneumatic cryogenic control valve Body type:	straight through casting globe type
Valve plug type:	non-balanced single seat plug type
Nominal size:	DN20~200,、 NPS 3/4〞~ 8〞
Nominal pressure:	PN16 ~ 100、 CLASS 150LB ~ 600LB
Connection: flange:	FF、RF、MF、RTJ
Welding:	SW、BW
Flange dimension:	According to to IEC 60534
Pneumatic cryogenic regulating valve Bonnet type:	Ⅲ:Low temperature extended type（-196℃~ 45℃）
Packing:	V type PFTE packing, flex. graphite packing, etc.
Gasket:	Metal graphite packing
Pneumatic cryogenic regulating valveActuator:	Pneumatic: multi-spring diaphragm actuator, piston type actuator.

2.2 Cryogenic control valve structure drawing

2.3 Cryogenic control valve material list

Component name	Control Valve Material
Body/Bonnet	LCB/LCC/LF2/CF8/CF8M/CF3M
Valve spool/Seat	304/316/316L(overlaying stellite alloy)
Packing	Normal:-196～150℃ is PTFE
Gasket	Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
Diaphragm Cover	Normal:Q235,Special:304
Diaphragm	NBR with reinforced polyester fabric
Spring	Normal:60Si2Mn,Special:50CrVa
Control valve stem	2Cr13/17-4PH/304/316/316L

2.4 Low temperature material suitable temperature list

Casting		Forging
Materials	Lowest working temperature	Materials	Lowest working temperature
LCB	-46°C	LF2	-46°C
LCC	-46°C	LF2	-46°C
LC1	-59°C	LF5	-59°C
LC2	-73°C	LF9	-73°C
LC3	-101°C	LF3	-101°C
CF8	-254°C	F304	-254°C
CF8M	-254°C	F316	-254°C
CF3	-254°C	F304L	-254°C
CF3M	-254°C	F316L	-254°C

2.5 Cryogenic control valve performance

Pneumatic cryogenic regulating valve Flow characteristic	Linear, percentage, quick open
Allowable range	50: 1 (CV<6.3 30: 1)
Rated Cv value	Percentage CV1.6~630 ，linear CV1.8~690
Pneumatic cryogenic regulating valve Allowable leakage	Metal seal: IV grade（0.01% rated capacity） Soft seal: VI grade（foam grade） Leakage standard: GB/T 4213
Pneumatic cryogenic regulating 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

2.6 Cryogenic control valve actuator parameter

Control Valve Type Method	Pneumatic diaphragm actuator
	PZMA-4~PZMA-7
	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 cryogenic regulating valve Accessories	E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch Non-standard accessories, need special customized notes.

2.7 Cryogenic control valve technical parameter

Seat diameter(mm)		10	12	15	20	25	32	40	50	65	80	100	125	150	200
Rated Cv	Percentage	1.6	2.5	4.0	6.3	10	16	25	40	63	100	160	250	400	630
Rated Cv	Linear	1.8	2.8	4.4	6.9	11	17.6	27.5	44	69	110	176	275	440	690
Nom. size	Travel	Option flow characteristic Cv. (★standard ●recommanded ○customized)
DN20	16mm	●	●	●	★
DN25	16mm	●	●	●	●	★
DN32	25 mm	○	○	○	○	○	★
DN40			○	○	○	○	●	★
DN50				○	○	○	●	●	★
DN65	40mm						○	○	○	★
DN80							○	○	○	●	★
DN100							○	○	○	●	●	★
DN125	60mm									○	○	○	★
DN150											○	○	●	★
DN200											○	○	●	●	★
Pneumatic actuator Diaphragm area, Ae(cm2)		PZMA-4					PZMA-5			PZMA-6			PZMA-7
Pneumatic actuator Diaphragm area, Ae(cm2)		280					400			600			1000
Action	Spring range	Pneumatic cryogenic regulating valve Metal sealing allowable pressure difference (MPa)
Air open	20-100KPa	4.46	3.09	1.98	1.16	0.7	0.44	0.28	0.18	0.17	0.11	0.07	0.07	0.05	0.03
	40-200 KPa	6.4	6.4	5.94	3.34	2.14	1.31	0.84	0.53	0.51	0.33	0.21	0.22	0.15	0.09
	80-240 KPa	6.4	6.4	6.4	6.4	4.99	3.05	1.95	1.25	1.18	0.78	0.5	0.51	0.36	0.21
Air close	20-100KPa	6.4	6.19	3.96	2.23	2.14	0.87	0.56	0.35	0.34	0.22	0.14	0.15	0.1	0.06
	40-200 KPa	6.4	6.4	6.4	6.4	6.4	5.86	3.64	2.3	2.21	1.43	0.91	0.95	0.66	0.37
	80-240 KPa	6.4	6.4	6.4	6.4	6.4	6.4	5.04	3.18	3.06	1.98	1.26	1.32	0.92	0.52

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