ZJHP Compact Pneumatic Diaphragm Single-Seat Control Valve

ZJHP Compact Pneumatic Diaphragm Single-Seat Control Valve

The ZJHP compact pneumatic diaphragm single-seat control valve consists of a single-seat valve body and a pneumatic actuator. The compact single-seat design features a tight structure, light weight, sensitive operation, streamlined S-shaped flow channel, low pressure drop, large flow capacity, accurate flow characteristics, and convenient assembly and disassembly.The cage-type quick-removal design solves the problems of traditional threaded-in valve seats, such as difficult on-site maintenance and high servicing costs.It is suitable for applications requiring strict leakage control, low differential pressure across the valve, and media with certain viscosity or small amounts of fibrous content.

European-style precision construction, accurate control, excellent sealing performance, advanced design, and superior quality

Exceptional craftsmanship, optimized structure, smooth flow, fast response, and a reliable alternative to imported products

Low pressure loss, stable output force, high flow coefficient, smooth flow channels with equal cross-sections, wide control range, high flow-characteristic accuracy, top-guided structure, and easy handwheel operation

Technical Parameters and Performance - Valve Body
Type	Straight-through single-seat cast ball valve
Nominal Diameter	15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200mm
Nominal Pressure	PN16, 40, 64bar
Flange Standard	JB/T79.1-94, 79.2-94, etc.
Material	Cast steel (ZG230-450), Stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti), etc.
Upper Bonnet	Standard type: -17~230℃Heat dissipation type: 230~450℃Low temperature type: -60~-196℃Bellows sealed type: -40~350℃
Bonnet Type	Bolted type
Packing	V-type PTFE packing, Impregnated PTFE asbestos packing, Asbestos textile packing, Graphite packing
Structural Type	(See Figure 1~Figure 5 for details)

Technical Parameters and Performance - Inner Valve Components
Valve Core Type	Single-seat plunger type valve core
Flow Characteristic	Equal percentage characteristic and linear characteristic
Material	Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), Stainless steel surfacing Stellite alloy, Titanium and corrosion-resistant alloy, etc.

Technical Parameters and Performance - Actuator
Type	ZHA/B multi-spring diaphragm actuator
Model	ZHA/B-22ZHA/B-23ZHA/B-34ZHA/B-45ZHA/B-56
Effective Area (cm²)	3503505609001400
Stroke (mm)	10, 16254040, 60100
Spring Range (KPa)	20~100 (Standard), 20-60, 60-100, 40-200, 80-240
Diaphragm Material	Nitrile rubber with nylon fabric, EPDM rubber with nylon fabric
Supply Pressure	140~400KPa
Air Source Interface	RC1/4"
Ambient Temperature	-30~70℃

Performance
Item			Without Positioner	With Positioner
Basic Error %			±5.0	±1.0
Hysteresis %			≤3.0	≤1.0
Dead Band %			≤3.0	≤0.4
Start-End Point Deviation %	Flow Open	Start Point	±2.5	±1.0
	Flow Open	End Point	±5.0	±1.0
	Flow Close	Start Point	±5.0	±1.0
	Flow Close	End Point	±2.5	±1.0
Rated Stroke Deviation %			≤2.5
Leakage l/h			0.01%×Valve Rated Capacity
Adjustable Range R			30:1

Rated Flow Coefficient Kv, Rated Stroke, Matched Actuator Model
Nominal Diameter DN (mm)	15/20				25	32	40	50	65	80	100	125	150	200
Valve Seat Diameter DN (mm)	10	12	15	20	25	32	40	50	65	80	100	125	150	200
Rated Flow Coefficient Kv - Linear	1.8	2.8	4.4	6.9	11	17.6	27.5	44	69	110	176	275	440	690
Rated Flow Coefficient Kv - Equal Percentage	1.6	2.5	4.0	6.3	10	16	25	40	63	100	160	250	400	630
Rated Stroke L (mm)	10				16	25			40			60
Matched Actuator Model	ZHA/B-22					ZHA/B-23			ZHA/B-34			ZHA/B-45

Allowable Pressure Difference
Nominal Diameter DN (mm)			15/20				25	32	40	50	65	80	100	125	150	200
Seat Diameter DN (mm)			10	12	15	20	25	32	40	50	65	80	100	125	150	200
Actuator			ZHA/B-22					ZHA/B-23			ZHA/B-34			ZHA(B)-45
Action Mode	Air Supply Pressure (Kpa)	Spring Range (Kpa)	Allowable Pressure Difference Δ(bar)
Air-to-Close	140	20~100	64	61.9	39.6	22.3	21.4	8.7	5.6	3.5	3.4	2.2	1.4	1.5	1	0.6
	250	20~100	64	64	64	64	64	56.8	36.4	23	22.1	14.3	9.1	9.5	6.6	3.7
	400	40~200	64	64	64	64	64	64	50.4	31.8	30.6	19.8	2.6	13.2	9.2	5.2
Air-to-Open	140	20~100	44.6	30.9	19.8	11.6	7	4.4	2.8	1.8	11.7	1.1	0.7	0.7	0.5	0.3
	250	40~200	64	64	59.4	33.4	21.4	13.1	8.4	5.3	5.1	3.3	2.1	2.2	1.5	0.9
	400	80~240	64	64	64	64	49.9	30.5	19.5	12.5	11.8	7.8	5	5.1	3.6	2.1

Note：For bellows-sealed control valves, the maximum allowable pressure difference is 10 bar. If the value in the table is less than 10 bar, it remains unchanged; if it is greater than 10 bar, it is taken as 10 bar.

Outline Dimensions and Weight（mm）
Nominal Diameter	15/20	25	32	40	50	65	80	100	125	150	200
L - PN16/40	181	184	220	222	254	276	298	352	410	451	600
L - PN64	206	210	251	251	286	311	337	394	457	508	650
A	285	285	285	285	285	360	360	360	470	470	470
H1 - PN16/40	128	128	152	152	160	205	205	208	273	330	364
H1 - PN64	140	140	160	160	180	210	210	220	290	340	370
H2	298	298	298	298	298	380	380	380	510	510	510
H3 - PN16/40	208	208	224	228	228	334	334	342	408	453	482
H3 - PN64	220	220	240	240	240	350	350	360	420	470	500
H4	238	338	402	402	405	627	628	635	698	702	728
H5 - PN16/40	53	58	68	73	80	90	98	108	123	140	168
H5 - PN64	63	68	75	83	88	100	105	125	148	170	203
C	220	220	220	220	220	270	270	270	320	320	320
H6	180	180	180	180	180	236	236	236	310	310	310
Weight (kg) - PN16/40	21	22	24	32	38	62	67	83	132	160	245
Weight (kg) - PN64	24	25	30	42	52	78	82	102	170	190	285

Note

1. The weight in the table is standard data without accessories. Side-mounted handwheels can also be installed.

2. Valve flanges and flange end face distances can be manufactured according to user-specified standards, such as ANSI, JIS, DIN standards.

Outline Dimensions and Weight（mm）
Nominal Diameter	15/20	25	32	40	50	65	80	100	125	150	200
L - PN16/40	181	184	220	222	254	276	298	352	410	451	600
L - PN64	206	210	251	251	286	311	337	394	457	508	650
A	285	285	285	285	285	360	360	360	470	470	470
H1	700	700	700	700	700	700	700	700	700	700	700
H2	298	298	298	298	298	380	380	380	510	510	510
H3	88	88	88	88	88	94	94	94	110	110	110
H5 - PN16/40	53	58	68	73	80	90	98	108	123	140	168
H5 - PN64	63	68	75	83	88	100	105	125	148	170	203
D1 - PN16/40	230	230	250	270	305	342	375	430	490	556	665
D1 - PN64	270	270	305	342	375	430	490	556	665	665	765
D2 - PN16/40	310	310	335	355	390	430	465	520	585	660	770
D2 - PN64	355	355	390	430	465	520	585	600	770	770	890
h	15	15	15	15	15	18	18	18	20	20	20
n-d - PN16/40	8-12	8-12	8-12	8-14	8-14	10-14	10-14	12-16	14-16	16-16	18-16
n-d - PN64	8-14	8-14	8-14	10-14	10-14	12-16	14-16	16-16	18-16	18-16	18-16
Y	45	45	60	65	75	90	104	135	165	195	245
C	220	220	220	220	220	270	270	270	320	230	320
H6	180	180	180	180	180	236	236	236	310	310	310
Weight (kg)	40	48	52	60	68	90	105	143	210	282	315

Note:

1. The insulation length is taken as 700mm. The weight in the table represents the PN16 data. Side-mounted handwheels can also be installed.

2. The valve flange and the distance from the flange end face can be manufactured according to the user's specified standards, such as ANSI, JIS, and DIN standards.

Outline Dimensions and Weight（mm）
Nominal Diameter	15/20	25	32	40	50	65	80	100	125	150	200
L	181	184	220	222	254	276	298	352	410	451	600
A	285	285	285	285	285	360	360	360	470	470	470
H1	152	152	177	177	183	221	221	230	315	355	385
H2	298	298	298	298	298	380	380	380	510	510	510
H3	220	220	240	240	240	350	350	360	420	470	500
H5	75	81	89	95	109	121	133	146	160	180	210
L1	101	101	108	108	108	123	123	123	140	140	140
L2	126	126	126	130	141	156	170	180	200	220	265
C	220	220	220	220	220	270	270	270	320	320	320
H6	180	180	180	180	180	236	236	236	310	310	310
Flange Specification DN	40	40	50	65	80	100	125	150	200	250	300
Weight (kg)	26	27	35	44	56	84	88	109	185	202	305

Note:

1. The weights shown in the table are for PN16 data. Side-mounted handwheels can also be installed.

2. The flange and the flange end face distance can be manufactured according to the user's specified standards, such as ANSI, JIS, or DIN standards.