Self-Operated Pressure Control Valve (Model V230)_Meisonilan Valves (Suzhou) Co., Ltd.

Model Specifications

Category	Pressure Control Regulating Valves				Differential Pressure Control Regulating Valves
	Post-Valve Pressure Regulating Valves		Pre-Valve Pressure Regulating Valves		Valves Close When Differential Pressure Rises		Valves Open When Differential Pressure Rises
	Hard Seal	Soft Seal	Hard Seal	Soft Seal	Hard Seal	Soft Seal	Hard Seal	Soft Seal
Model	V230D01	V230D01	V230D02	V230D02	V230D03	V230D03	V230D04	V230D04
Specification	DN15 - 250

Main Technical Parameters

Nominal Diameter (mm)		15	20	25	32	40	50	65	80	100	125	150	200	250
Rated Flow Coefficient Kvs		3.2	5	8	12.5	20	32	50	80	125	160	320	450	630
Nominal Pressure (Mpa)		1.6; 4.0
Z Value		0.6	0.6	0.6	0.55	0.55	0.5	0.5	0.45	0.4	0.35	0.3	0.2	0.2
Maximum Operating Temperature (℃)	V230 V231	Liquid ≤ 140; Gas ≤ 80
	Hard Seal V230	With Isolation Tank ≤ 200											With Isolation Tank and Extension Piece ≤ 300
	Hard Seal V230	With Isolation Tank and Heat Sink ≤ 200											With Isolation Tank and Extension Piece ≤ 300
Pressure Balancing Element		Bellows											Rolling Diaphragm
Flange Standard		DIA (Flange standards can also be provided according to user requirements)
Valve Body Material		PN16: Cast Iron (Operating Temperature ≤ 200℃); PN40: Cast Steel, Cast Stainless Steel (Operating Temperature ≤ 350℃)
Valve Core Material		Stainless Steel: Soft seal is stainless steel inlaid with rubber ring
Maximum Operating Pressure (MPa)		Nominal Pressure (Note the relationship between △Pmax, operating pressure, and operating temperature)

Note:
1. When the liquid temperature is > 140℃ or the gas temperature is > 80℃, the valve should be installed upside down.
2. Z value: Noise measurement system, which is used to measure the noise level. For specific calculations, please refer to the Self - Acting Regulating Valve Selection Guide.

Main Technical Parameters of the Actuator

Model	V230 D01(D03) V231D01(D03)				V230 D02(D04) V231D02(D04)
Effective Area (cm²)	23※	80※	250	630	23※	80※	250	630
Pressure Setting Range (MPa)	0.3 - 1.2	0.1 - 0.6	0.015 - 0.15	0.005 - 0.035	0.3 - 1.1	0.1 - 0.5	0.015 - 0.12	0.005 - 0.035
Pressure Setting Range (MPa)	0.8 - 1.6	0.05 - 0.3	0.01 - 0.07	0.005 - 0.035	1.0 - 1.6	0.05 - 0.25	0.01 - 0.06	0.005 - 0.035
Minimum Pressure Difference △P (MPa) to Ensure Normal Operation of the Pressure Valve	≥ 0.05	≥ 0.04	≥ 0.01	≥ 0.005	≥ 0.05	≥ 0.04	≥ 0.01	≥ 0.05
Maximum Permissible Pressure Difference (MPa) between the Upper and Lower Diaphragm Chambers	2.0	1.25	0.4	0.15	2.0	1.25	0.4	0.15
Stroke (mm)	18	18	23	23	18	18	23	23
Material	Diaphragm: EPDM or FKM with fiber; Diaphragm Cover: Galvanized Steel Plate
Control Pipeline and Joint	Copper or Steel Pipe 10×1; Compression Fitting

Note:
1. This pressure setting range is not applicable to DN150 - 250.
2. EPDM is suitable for water, steam, and gas media, while FKM is suitable for oil, water, steam, and gas media. Please note the type of medium when placing an order.

Performance Indicators

Control Accuracy	±8%
Permissible Leakage (Under Specified Test Conditions) (l/h)	Hard Seal	4×10⁻⁴ of the valve's rated capacity
	Soft Seal	DN15 - 50	DN65 - 125	DN150 - 250
		10 bubbles/min	20 bubbles/min	40 bubbles/min

Permissible Pressure Difference

Nominal Diameter (mm)	15	20	25	32	40	50	65	80	100	125	150	200	250
Maximum Pressure Difference △P (MPa) for PN16	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.5	1.5	1.2	1.0	1.0
Maximum Pressure Difference △P (MPa) for PN40	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	1.5	1.5	1.2	1.0	1.0

External Dimensions

Dimensions and Weights

Nominal Diameter (mm)	20	25	32	40	50	65	80	100	125	150	200	250
L (mm)	150	160	180	200	230	290	310	350	400	480	600	730
B (mm)	212	238	238	240	240	275	275	380	380	295	325	372
Approximate Weight (kg)	6.7	9.7	13	14	17	29	33	60	70	80	140	220

Dimensions and Weights of D02 (D04) Actuators

Effective Area (cm²)	32	80	250	630
D (mm)	172	172	263	380
H (mm)	435	430	470	520
Approximate Weight (kg)	7.5	7.5	13	28

Dimensions and Weights of D01 (D03) Actuators

Effective Area (cm²)	32	80	250	630
D (mm)	172	172	263	380
H (mm)	440	435	440	520
Approximate Weight (kg)	7.5	7.5	13	28

Operating Temperature Ranges of Main Component Materials

Material	Temperature Range (℃)	Remarks
HT200	-20 - 200
QT400 - 18, QT400 - 15	-20 - 350
ZG230 - 450	-40 - 450
ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti	-250 - 550
2Cr13	-20 - 450
1Cr18Ni9	-196 - 550
0Cr18Ni12Mo2Ti	-196 - 600
Polytetrafluoroethylene	-40 - 200
Carbon Fiber	-120 - 350
Flexible Graphite	-200 - 600
5860 Glue - Bonded 480D551 Nylon Canvas	-40 - 80

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.