Sleeve-guided Single-seat Control Valve_Meisonilan Valves (Suzhou) Co., Ltd.

The ZJHP pneumatic diaphragm single-seat control valve consists of a pneumatic multi-spring diaphragm actuator and a low-flow-resistance single-seat valve. The new-type actuator is low in height, light in weight, and easy to install and calibrate. The new-type valve body is compact in structure, with smooth flow paths and a large flow coefficient.

The pneumatic diaphragm single-seat control valve operates stably, with reliable action characteristics, precise flow characteristics, and a large adjustable range. High-quality control effects have been achieved in a wide range of applications.

Pneumatic diaphragm single-seated control valve Technical parameters and performance:

Valve body part:

Valve body type:	Straight-through cast spherical valve
Nominal diameter:	DN20, 25, 32, 40, 50, 65, 80, 100, 200
Nominal pressure:	PN 1.6, 2.5, 4.0, 6.4, 10.0Mpa
	ANSI 150, 300, 600Lb
	JIS 10K, 20K, 30K, 40K
Connection method:	Flange: FF, RF, RTJ, etc.
	Thread: (Suitable for below 1")
	Welding: SW, BW
Flange distance:	Complies with IEC 534
Bonnet type:	Standard type, extended type (heat dissipation, low temperature, bellows seal)
Packing:	V-type PTFE, flexible graphite packing, etc.
Gasket:	Metal-clad graphite gasket, PTFE gasket
Actuator:	Pneumatic: Multi-spring actuator, single-spring actuator
Actuator:	Electric: 3810L series, SL series

Valve internal parts:

Plug type:	Single-seated plunger
Flow characteristic:	Equal percentage, linear, quick opening
Internal parts material:	Refer to the appendix for the standard material combination and the applicable temperature and pressure range.

User options available

Valve body	Type	Straight-through	Bonnet	Type	Standard, extended type
Valve body	Material	WCB, WC9, 304, 316, etc.	Bonnet	Material	WCB, WC9, 304, 316, etc.
Plug	Characteristic	Linear, equal percentage, quick opening	Packing	"V"-type PTFE, flexible graphite, bellows
Plug	Material	304, 304 + STL/PTFE, 316, 316 + STL/PTFE	Packing	"V"-type PTFE, flexible graphite, bellows
Actuator	Pneumatic: See Table 8
Actuator	Electric: See Table 7
Positioner	Electro-pneumatic valve positioner, intelligent digital positioner
Accessories	Solenoid valve, valve position feedback device, manual operator, position holding valve, air filter regulator, etc.

Materials and internal structure

The body material is carbon steel

1	Valve body	WCB	LCB	WC9
2	Gasket	316 + graphite/PTEF
3	Bolt	35	40MnB	25Cr2Mo1VA
4	Seat	304	304	304
5	Plug (stem)	304	304	304
6	Gasket	316 + graphite/PTEF
7	Guide sleeve	304	304	304
8	Bonnet	WCB	LCB	WC9
9	Nut	25	35	25Cr2Mo1VA
10	Packing gland	304	304	304
11	Packing	PTFE/flexible graphite
12	Compression sleeve nut	304	304	304

The body material is stainless steel

1	Valve body	CF8	CF8M	CF3M
2	Gasket	316 + graphite/PTEF
3	Bolt	304	316	316L
4	Seat	304	316	316L
5	Plug (stem)	304	316	316L
6	Gasket	316 + graphite/PTEF
7	Guide sleeve	304	316	316L
8	Bonnet	CF8	CF8M	CF3M
9	Nut	304	316	316L
10	Packing gland	304	316	316L
11	Packing	PTFE/flexible graphite
12	Compression sleeve nut	304	316	316L

Note:

1. The above is the standard configuration structure. The seat is metal-to-metal, and the PTFE soft seat is an optional part for Class VI sealing. Hardened valve internal parts with Stellite alloy coating can also be provided. For specific operating temperatures, we have more reasonable bolt and nut selections.

2. The PTFE V-ring valve stem packing is the standard configuration, and flexible graphite can also be selected. An extended bonnet equipped with graphite packing can be used in applications where the temperature exceeds 232°C (450°F).

3. The standard valve body materials are carbon steel and stainless steel. Various alloy materials for highly corrosive applications can also be provided.

Dimensions, reduced-port internal parts, and rated Cv values for stroke:

Valve size inch(mm)	Plug size(mm)	Rated stroke(mm)	Rated Cv values
			Valve opening % stroke
			Equal percentage characteristic					Linear characteristic
			10%	30%	50%	70%	100%	10%	30%	50%	70%	100%
3/4	8	16	0.09	0.17	0.34	0.95	1.6	0.27	0.68	1.09	1.49	1.8
-20	10		0.14	0.27	0.53	1.48	2.5	0.42	1.06	1.69	2.32	2.8
	15		0.22	0.43	0.85	2.37	4	0.67	1.66	2.65	3.65	4.4
	20		0.34	0.68	1.35	3.74	6.3	1.05	2.6	4.16	5.72	6.9
1	15	16	0.22	0.43	0.85	2.37	4	0.67	1.66	2.56	3.65	4.4
-25	20		0.34	0.68	1.35	3.74	6.3	1.05	2.6	4.16	5.72	6.9
	25		0.55	1.08	2.14	5.93	10	1.67	4.15	6.64	9.11	11
1 1/4	20	25	0.34	0.68	1.35	3.74	6.3	1.05	2.6	4.16	5.72	6.9
-32	25		0.55	1.08	2.14	5.93	10	1.67	4.15	6.64	9.11	11
	32		0.87	1.73	3.42	9.49	16	2.67	6.63	10.62	14.58	17.6
1-1/2	25	25	0.55	1.08	2.14	5.93	10	1.67	4.15	6.64	9.11	11
-40	32		0.87	1.73	3.42	9.49	16	2.67	6.63	10.62	14.58	17.6
	40		1.36	2.72	5.35	14.82	25	4.17	10.37	16.59	22.79	27.5
2	32	25	0.87	1.73	3.42	9.49	16	2.67	6.63	10.62	14.58	17.6
-50	40		1.36	2.72	5.35	14.82	25	4.17	10.37	16.59	22.79	27.5
	50		2.18	4.32	8.54	23.71	40	6.67	16.68	26.56	36.46	44
2 1/2	40	40	1.36	2.72	5.35	14.82	25	4.17	10.37	16.59	22.79	27.5
-65	50		2.18	4.32	8.54	23.71	40	6.67	16.58	26.56	36.46	44
	65		3.34	6.81	13.45	37.35	63	10.47	20.01	41.63	57.17	69
3	50	40	2.18	4.32	8.54	23.71	40	6.67	16.58	26.56	36.46	44
-80	65		3.34	6.81	13.45	37.35	63	10.47	26.01	41.63	57.17	69
	80		5.45	10.81	21.36	59.28	100	16.69	41.46	66.37	91.14	110
4	65	40	3.34	6.81	13.45	37.35	63	10.47	26.01	41.63	57.17	69
-100	80		5.45	10.81	21.36	59.28	100	16.69	41.46	66.37	91.14	110
	100		8.72	17.29	34.17	94.85	160	26.7	66.34	106.2	145.8	176
5	80	60	13.62	10.81	21.36	59.28	100	16.69	41.46	66.37	91.14	110
-125	100		21.8	17.29	34.17	94.85	160	26.7	66.34	106.2	145.8	176
	125		13.62	27.06	53.4	148.2	250	41.72	103.7	165.9	227.9	275
6	100	60	21.8	17.29	34.17	94.85	160	26.7	66.34	106.2	145.8	176
-150	125		13.62	27.06	53.4	148.2	250	41.72	103.7	165.9	227.9	275
	150		21.8	43.23	85.42	237.1	400	66.75	165.85	265.5	364.6	440
8	125	60	13.62	27.06	53.4	148.2	250	71.72	103.7	165.9	227.9	275
-200	150		21.8	43.23	85.42	237.1	400	66.75	165.85	265.5	364.6	440
	200		34.34	68.08	134.5	373.5	630	104.7	260.1	416.3	571.7	690

Maximum allowable pressure difference:

Multi-spring diaphragm actuator Unit: Mpa

Pneumatic actuator specification	Air supply pressure Kpa	Spring range Kpa	Plug size inch(mm)
Pneumatic actuator specification	Air supply pressure Kpa	Spring range Kpa	3/4 20	1 25	1	1	2 50	2	3 80	4 400	5 125	6 150	8 200
ZHB22	140	20 - 100	1.17	0.75	-	-	-	-	-	-	-	-	-
	240	40 - 200	2.73	1.75	-	-	-	-	-	-	-	-	-
	300	80 - 240	5.85	3.75	-	-	-	-	-	-	-	-	-
ZHB23	140	20 - 100	1.64	1.05	0.63	0.4	0.26	-	-	-	-	-	-
	240	40 - 200	3.82	2.45	1.49	0.96	0.61	-	-	-	-	-	-
	300	80 - 240	8.19	5.24	3.19	2.05	1.31	-	-	-	-	-	-
ZHB34	140	20 - 100	-	-	1.02	0.66	0.42	0.24	0.16	0.1	-	-	-
	240	40～200	-	-	2.38	1.53	0.98	0.58	0.38	0.24	-	-	-
	300	80～240	-	-	5.12	3.28	2.1	1.24	0.82	0.52	-	-	-
ZHB45	140	20～100	-	-	-	-	-	0.4	0.26	0.17	0.11	0.07	0.02
	240	40～200	-	-	-	-	-	0.93	0.61	0.39	0.25	0.17	0.07
	300	80～240	-	-	-	-	-	1.98	1.32	0.84	0.54	0.37	0.16

※The above recommendations for using pressure differentials are only relative. There are multiple configuration combinations for various pressure differentials. For complex control systems, please contact our technical department. We have many years of experience in process control product production and can provide you with more reasonable actuator configurations.

Configure ZH series pneumatic actuator control valve with external dimensions in mm

Valve Dimension		L						H1	H2	h1	H3	C	B	A	L2	执行机构
inch	mm	ANSI150 N16、25		ANSI300 N40		ANSI600PN64、100		H1	H2	h1	H3	C	B	A	L2	执行机构
3/4	20	184	7.25	184	7.25	206	8.12	425	53	213	704	288	200	200	289	ZHB-22
1	25	184	7.25	184	7.25	210	8.25	435	58	218	710	288	200	200	289	ZHB-22
1 1/4	32	200	7.87	200	7.87	251	9.88	448	70	231	722	288	200	200	289	ZHB-22
1 1/2	40	222	8.75	222	8.75	251	9.88	448	75	231	722	288	200	200	289	ZHB-23
2	50	254	10	254	10	286	11.25	487	83	255	740	288	200	200	289	ZHB-23
2 1/2	65	276	10.88	276	10.88	311	12.25	628	93	311	884	360	355	355	347	ZHB-34
3	80	298	11.75	317	12.5	337	13.25	645	98	328	902	360	355	355	347	ZHB-34
4	100	352	13.88	368	14.5	394	15.5	656	115	328	913	360	355	355	347	ZHB-34
5	125	420	16.53	400	15.75	500	19.69	806	125	389	1274	470	570	570	476	ZHB-45
6	150	451	17.75	473	18.62	508	20	857	143	440	1325	470	570	570	476	ZHB-45

Valve Installation:
(1) Before installation, check that the product model, tag number, and specifications match the requirements. Inspect the entire valve for missing or loose parts.
(2) Prior to installation, clean the pipeline. Ensure there is sufficient straight pipe section at the valve inlet and install a filter. When connecting the valve body to the pipeline flanges, ensure coaxiality.
(3) Thoroughly clean the pipeline before installing the valve.
(4) The installation site should ensure the safety of personnel and equipment, facilitating operation, disassembly, and maintenance.
(5) The valve should be installed vertically upright on horizontal pipelines. If necessary, it can be installed at an angle, but horizontal installation should be avoided. For occasions with heavy valve weight or vibration, use a support frame.
(6) The medium flow direction must align with the arrow on the valve body. The air supply should be dry and oil-free. The valve should be used in environments with temperatures ranging from -20℃ to 55℃.

Valve Maintenance:
(1) Cleaning the Valve: For general media, cleaning with water is sufficient. For media harmful to health, first understand their properties and then select an appropriate cleaning method.
(2) Disassembly: Remove rust from exposed rusted parts first. Before derusting, protect the machined surfaces of precision parts such as the valve seat, valve plug, valve stem, and push rod. Use special tools when disassembling the valve seat.
(3) Valve Seat: Minor rust or wear on the sealing surface can be repaired by machining. If damage is severe, replace the seat. However, both repaired and replaced hard sealing surfaces must be lapped.
(4) Valve Stem: If the surface is damaged, it must be replaced.
(5) Damage to Push Rod, Guide, and Sealing Surfaces: Reverse-acting actuators must be replaced; direct-acting actuators can be reused after proper repair.
(6) Compression Spring: If there are cracks or other defects affecting strength, replace it immediately.
(7) Wear Parts: Packing, gaskets, and O-rings must be replaced entirely during each maintenance. Check the valve plug and diaphragm for cracks, aging, or corrosion that may cause future failures. Decide whether to replace them based on inspection results, but the diaphragm service life should not exceed 2-3 years.
(8) When reassembling the valve, ensure alignment. Tighten bolts diagonally and lubricate sliding parts. After reassembly, debug the valve according to the factory test items and methods. During this period, accurately adjust the packing compression force and the valve plug closing position.

When placing an order, please fill in the Specification Sheet or specify the following information:

If the model has not been selected before ordering, please provide us with the operating parameters:
(1) Nominal diameter DN (mm);
(2) Nominal pressure (MPa or bar);
(3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
(4) Pressure before and after the valve (pressure differential);
(5) Requirements for flow characteristics;
(6) Materials of valve body and valve core;
(7) Connection type;
(8) Driving method (provide air supply pressure, driving voltage);
(9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
(10) On-site working conditions.
If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.