Pneumatic Flow Control Valve_Meisonilan Valves (Suzhou) Co., Ltd.

The pneumatic flow control valve adopts a sleeve-guided balanced valve trim and a split-type valve cage combination. It can be optionally equipped with an ordinary double-seat or single-sealed valve seat with a movable sealing ring. The labyrinth-type multi-layer gasket valve cage structure can effectively reduce noise, achieve multi-stage pressure reduction and prevent cavitation damage. It has strong anti-cavitation ability, is suitable for heavy loads, especially for the control of high-differential-pressure fluids, and can be used in very harsh working conditions.

Main technical parameters

Nominal dimeter	mm	20	25	32	40	50	65	80	100	125	150	200	250	300
Nominal dimeter	inch	3/4〞	1〞	1.25〞	1.5〞	2〞	2.5〞	3〞	4〞	5〞	6〞	8〞	10〞	12〞
Travel distance (mm)		16		25			40			60			100
Pressure rating		ANSI class 150 300 600; JIS 10k 20k 30k 40k; PN 1.6 4.0 6.4 10.0Mpa
Valve core shape		Balanced labyrinth gasket valve cage
Traffic characteristics		Improvement percentage, straight line
Rangeability		50:1
Connection type	Flange style	Flange style
Connection type	Welded type	welded type
External dimensions		Please refer to the external dimensions
Upper valve cover form		Standard type: -5℃~230℃
		Heat dissipation type: -45 ℃~5 ℃ or above 230 ℃
		Extended type: -196 ℃~-45 ℃
		Bellows sealed type (formal or welded), steam jacket type
		For the matching and working temperature range of valve body and internal component materials, please refer to the matching and working temperature range of component materials
Filler		PTFE V-shaped packing, PTFE carbon fiber, PTFE asbestos, and flexible graphite
Grommet		Serrated washer (extremely soft carbon steel, SUS316, other alloy steels)
Leakage		The metal valve seat meets the standard ANSI 16.104 Grade III, with a CV value less than 0.1% of the rated CV value
Leakage		The PTFE valve seat meets the standard ANSI 16.104 Grade IV and is less than 0.01% of the rated CV value. Please refer to the leakage rate
Maximum allowable pressure difference		Please refer to the maximum allowable pressure difference
Actuator		Pneumatic please refer to pneumatic actuator, electric please refer to electric actuator

Main parts

Serial Number	Part	Material
1	Valve body	WCB	CF8M	CF8
2	Valve cover	WCB	CF8M	CF8
3	Sleeve	304	316	304
4	Valve core	304	316	304
5	Sealing shaft sleeve	304	316	304
6	Valve stem	304	316	304
7	Filler	PTFE or flexible graphite
8	Packing bushing	304	316	304
9	Balance sealing ring	H461#
10	O-ring seal	NBR or FKM
11	Dust sealing ring	NBR or FKM
12	Packing seat	304	316	304
13	Grommet	304 or 316+flexible graphite
14	Cover bolt	35#	316	304
15	Gland nut	35#	316	304
16	Stem nut	304	304	304

Flow coefficient CV value

Nominal diameter	mm	25		32			40		50	65		80		100		125			150	200	250		300
Nominal diameter	inch	1〞		1.25〞			1.5〞		2〞	2.5〞		3〞		4〞		5〞			6〞	8〞	10〞		12〞
Valve core size (mm)		25		32		40			50	65	80		100			125		150		200	250		300
Rated CV value	Equal percentage	10	17		24			44		68	99		175		275		360			640		1000	1450
	linearity	13	18		32			51		80	205		115		320		513			805		1200	1600
	Porous type	5.8	9.6		16			40.2		51	70		138		177		256			464		761	1090
	level 2	4.7	7.1		10.8			18.3		29.2	49		85		104		143			224		410	492
	level 4	3.8	5.8		8.3			15.2		24.3	40.5		68		83		114			180		326	367
	level 6	3.2	4.8		6.7			12.2		19.6	33		58		70		94			142		273	290
	level 8	2.4	3.4		4.6			9.2		14.5	23.9		43		54		75			109		214	238

External dimensions of the actuator

Valve Dimension	L			p	A	Standard type		Heat dissipation type		Elongate type		Connection size of actuator
	PN1.6	PN4.0	PN6.4			h1	H1	h1	H1	H1	B	H3	M	D	d1	z-d
	PN1.6	PN4.0	PN6.4			h1	H1	h1	H1	h1=800	B	H3	M	D	d1	z-d
3/4"	184	194	206	52	285	132	482	282	632	1226	290	105	M12*1.25	60	80	4-10
1"	184	197	210	52	285	132	482	282	632	12 26	290	105	M12*1.25	60	80	4-10
1.5"	222	235	251	68	285	179	529	349	699	1246	370	105	M12*1.25	60	80	410
1.5"	222	235	251	68	360	179	615	349	785	1330	370	135	M16*1.5	80	105	4-12
2.5"	276	292	311	93	360	214	650	414	850	1367	410	135	M16*1.5	80	105	4-12
2.5"	276	292	311	93	470	214	802	414	1002	1519	410	160	M20*1.5	95	118	4-14
3"	298	317	337	98	360	221	657	421	857	1367	440	135	M16*1.5	80	105	4-12
3"	298	317	337	98	470	221	809	421	1009	1519	440	160	M20*1.5	95	118	4-14
4"	352	368	394	117	360	234	670	434	870	1367	490	135	M16*1.5	80	105	4-12
4"	352	368	394	117	470	234	822	434	1002	1519	490	160	M20*1.5	95	118	4-14
5"	403	425	460	133	470	270	858	527	1115	1536	560	160	M20*1.5	95	118	4-14
6"	451	473	508	150	470	294	882	554	1142	1536	630	160	M20*1.5	95	118	4-14
8"	543	568	610	186	470	331	919	591	1179	1536	760	160	M20*1.5	95	118	4-14
10"	673	700	770	245	580	387	1054	637	1305	-	-	178	M20*1.5	100	130	4-18
12"	737	775	819	248	580	465	1132	715	1382	-	-	178	M20*1.5	100	130	4-18

External dimensions of the actuator

Valve Dimension	PN1.6/4.0		L3			Standard type		Heat dissipation type		Elongate type		A	Connection size of actuator
	PN1.6/4.0		PN1.6	PN4.0	PN6.4	h1	H1	h1	H1	H1	B		H3	M	D	d1	z-d
	L1	L2	PN1.6	PN4.0	PN6.4	h1	H1	h1	H1	h1=800	B		H3	M	D	d1	z-d
3/4"	75	75	-	-	-	-	-	-	-	1301	290	285	105	M12*1.25	60	80	4-10
1"	75	75	-	-	-	-	-	-	-	1301	290	285	105	M12*1.25	60	80	4-10
1.5"	85	85	111	117	125	149	616	319	786	1329	335	360	135	M12*1.25	60	80	4-10
1.5"	85	85	111	117	125	149	702	319	872	1415	370	285	105	M16*1.5	80	105	4-12
2"	110	110	127	133	143	159	639	326	809	1354	370	285	105	M12*1.25	60	80	4-10
2"	110	110	127	133	143	159	725	326	895	1440	370	360	135	M16*1.5	80	105	4-12
2.5"	140	140	138	146	156	188	780	388	980	1517	410	360	135	M16*1.5	80	105	4-12
2.5"	140	140	138	146	156	188	922	388	1122	1669	410	470	160	M20*1.5	95	118	4-14
3"	160	150	149	159	168	194	789	394	898	1517	440	360	135	M16*1.5	80	105	4-12
3"	160	150	149	159	168	194	941	394	1141	1669	440	470	160	M20*1.5	95	118	4-14
4"	170	160	176	184	197	234	854	413	1033	1517	560	360	135	M16*1.5	80	105	4-12
4"	170	160	176	184	197	234	1006	413	1185	1669	560	470	160	M20*1.5	95	118	414
5"	-	-	200	-	-	270	1047	527	1307	1615	560	470	160	M20*1.5	95	118	4-14
6"	-	-	240	-	-	294	1071	554	1334	1615	630	470	160	M20*1.5	95	118	4-14
8"	-	-	300	-	-	331	1108	591	1371	1615	760	470	160	M20*1.5	95	118	4-14

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.