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ZJHF Type Pneumatic 3-Way Control Valve

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Control Valve

ZJHF Type Pneumatic 3-Way Control Valve includes disverging and converging actions, it can replace two sets two-way valve and widely used in many occasions to regulate pressure, flowrate, temperature and liquid level. Spool structure with side guiding, well stability, no vibration, low noisy, can bear high pressure difference, easy for connection, etc. While with low nominal size and pressure difference, converging valve can be used in disverging occasion. However, while nominal size higher than DN100 and high pressure difference, converging valve and disverging valve can’t be exchanged.

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ZJHF Type Pneumatic 3-Way Control Valve overview manuals guides Live photos

Specification

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:	acc. to IEC 60534
Bonnet type:	standard type（-5℃~230℃） Radiator type: （-45℃~higher than 230℃occasion） Low temperature extended type（-196℃~ -45℃） Bellow seal type
Packing:	V type PFTE packing, flex. graphite packing, etc.
Gasket:	Metal graphite packing
Actuator:	pneumatic: multi-spring diaphragm actuator, piston type actuator. electric: 3810L series smart actuator, PSL series actuator.
Surface painting:	Green color, acrylic acid polyurthene ceramic paint.

Code

Z	Actuator	H	Structure	Nominal pressure	Body material	Nominal size
Z series control valve	J: pneumatic diaphragm type H: pneumatic piston type	H: direct travel	F: disverging type H: converging type F(H)G: radiator disverging(converging) type F(H)V: bellow seal disverging (converging) type F(H)D: low temperature disverging(converging) type	PN16=16 CL150LB=150 LB JIS10K=10K	C=WCB LC=LCB P=CF8 PL=CF3 R=CF8M RL=CF3M D= special material	DN25= DN25 NPS1〞= NPS 1〞
Such as: Pneumatic diaphragm converging (disverging) 3-way control valve, radiator type, pressure PN16, valve material WCB, nominal size DN50, type: ZJHFG-16C DN50

Performance

Flow characteristic		Linear, percentage
Allowable range		30: 1
Rated Cv value		Percentage \ linear CV8.5~1280
Allowable leakage		Metal seal: IV grade（0.01% rated capacity）
Performance		Pneumatic	Electric
	Allowable tolerance, %	±1.5	±1.0
	Return difference, %	≤1.5	≤1.0
	Dead zone, %	≤0.6	≤1.0
	Difference from beginning to end point, %	±2.5	±2.5
	Rated travel difference, %	≤2.5	≤2.5
Note : specification on the basis of control valve with positioner and PTFE packing.

Special specification

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

3-way Control Valve Actuator

Type/ Method	Pneumatic diaphragm actuator	Electric actuator
	ZH23～ZH56	3810L series
	Multi-spring type	Intelligent integrated type
Usage	Regulating type, ON-OFF type	Regulating
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	Power: AC 200V±10% 50Hz Or Power: AC 380V±10% 50Hz
Connector	Air pipe connector: RC1/4	Nomal type: cable inlet 2-PF(G1/2〞) Explosive proof: Protection jacket PF(G3/4〞)
Positive action	Pressure increase, stem descend, valve close.	Input signal increase, stem descend, valve close.
Negative action	Pressure increase, stem ascend, valve open.	Input signal increase, stem ascend, valve open.
Input signal	40～20mA.DC（with positioner）	Input/output4～20mA.DC
Lag	≤1%FS（with positioner）	≤0.8%FS
Linear type	2%FS（with positioner）	≤+1%FS
Environmental temperature	-10℃～+70℃	Standard type: -10℃～+60℃ With space heater : -35℃～+60℃ Explosive proof: -10℃～+40℃
Surface coating	Green, acrylic acid polyurethane coating	Blue, acrylic acid polyurethane coating
Accessories	Electric-air (air-air) valve positioned, filter regulator, valve converter, solenoid valve, limited switch	Space hearter (normal type)
Note : non-standard accessories, need special customized notes.

3-way Control Valve Parameter

Nominal size	Travel	Option flow coefficient Cv（★standard ●recommended）
Seat diamter（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
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	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
Electric actuator		Metal sealing max. allowable pressure difference（MPa）
Type	Thrust（N）	Metal sealing max. allowable pressure difference（MPa）
3810L-08	800	1.52
3810L-20	2000	3.05	1.86	1.19	0.76
3810L-30	3000		2.79	1.79	1.14
3810L-50	5000		4.66	2.98	1.91	1.13	0.6	0.47
3810L-65	6500					1.35	0.8	0.57		0.39	0.26	0.16
3810L-99	10000									0.61	0.42	0.20	0.17	0.11
3810L-160	16000									0.97	0.67	0.35	0.27	0.18