KOSCN Scientific MV304 Electric Diaphragm Valve

The KOSCN Control Valves MV304 Electric Diaphragm Valve is a modular product that can be upgraded from manual valves to automate applications online. It can also serve as an automated valve in entirely new installations. Its smooth flow path combined with a high-precision electric actuator results in superior linear regulation performance.

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Data Sheet PRODUCT MANUAL Company Product Brochure

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Convenience and Maintenance

The automation module adopts a clamping connection, making it easy to assemble and disassemble.
Features a fully plastic exterior structure, which is aesthetically pleasing and corrosion-resistant.
Precise screw fit with clearance for smooth, maintenance-free operation.
Does not rely on the presence of a compressed air system.
Integrated LED interface for easy setting and monitoring.
Allows manual upgrades without interrupting the production line.

High Safety Performance

Stronger casing, suitable for more corrosive environments.
Suspended diaphragm coupling mechanism provides full protection to the diaphragm.
All products' torque is independently verified to ensure product longevity.

High Flexibility

Connection types include socket fusion and butt welding.
Interface standards include metric, JIS (Japanese Industrial Standards), and ANSI (American National Standards Institute).
Diaphragm materials: EPDM, FPM, EPDM-PTFE.
Valve body materials: PVC-U, PVC-C, PP-H, PP-N, PVDF. * Some products offer oil-free options.

Optimal Flow Performance

Rated voltage: AC/DC24V, AC95-265V.
Control methods: 4-20mA, 0-20mA, 0-5V, 1-5V, 2-10V.
Feedback method: 4-20mA.
Alarm output signal: Relay contact, optional.
Position accuracy: ±1%. * Equipped with a high-performance brushless motor with built-in overcurrent and overload protection.

Disassembled Components and Material Structure Selection

NO	Part Names	Materials
A	Electric Actuator	- Upgrades and expands on existing manual diaphragm valves in pipeline systems. - Enables online installation without the need for shutdown. - Features IP67 protection rating. - Offers online closed position calibration settings. - Beyond on/off functionality, it is suitable for proportional control adjustments. - Offers a variety of input and output options to meet different system requirements. - Has an all-plastic housing for chemical resistance. - Includes an intuitive valve position indicator window.
B	Mounting Bracket	- Chemical-resistant PP wrapped bracket. - Equipped with mounting nuts at the base for easy installation. - Simplifies installation when expanding manual diaphragm valves online. - Features a rotation mechanism with superior wear resistance compared to manual diaphragm valves. - Standard in white, with custom colors available upon request.
C	Diaphragm Valve Body	- Exhibits excellent linear fluid dynamics for control functions. - Smooth transitional flow paths provide double the flow capacity of traditional diaphragm valves. - Suitable for media containing small particles and solids. - Seamless integration of diaphragm and valve body eliminates dead zones. - Enhanced diaphragm structure for improved fatigue life. - Applicable for both on/off and control adjustments in vacuum systems.

Size

d	DN	GD	D1	H	H1	H2	L	L1	N	W	W1	W2	M
20	15	1	46	29	97	90	128	196	70	102	89	60	M6
25	20	1-1/4	56	35	109	90	152	221	70	102	112	60	M6
32	25	1-1/2	66	39	143	90	166	234	70	102	139	80	M8
40	32	2	79	44	148	90	192	260	70	102	139	80	M8
50	40	2-1/4	86	53	196	120	222	284	111	132	164	80	M8
63	50	2-3/4	108	63	206	120	266	321	111	132	184	80	M8

Pressure-Temperature Curves

Data based on clean water media and a 25-year safety life; applications with other media must reduce temperature and pressure.

Flow Capacity

Data based on 20°C clean water media and a 1 bar pressure difference;
Cv = Kv X 0.07
Fv = Kv X 0.0585
Kv (l/min)
Cv (gal/min) US
Fv (gal/min) GB

Relative Flow Linearity Graph

The relative flow linearity coefficient refers to flow variation as a function of valve opening travel.

KOSCN

Founded in 2005 and headquartered at the forefront of China's reform and opening-up in Shenzhen, KOSCN Industrial Manufacturing (Shenzhen) Co., Ltd. has expanded its presence with subsidiaries and offices in Suzhou, Chengdu, Changsha, Hong Kong, and even overseas in Germany. With a robust network of pre-sales and after-sales agency teams spread across China and abroad, KOSCN stands as a global enterprise specializing in the manufacture of fluid control products for ultra-pure and corrosive systems, including automation valves and instrumentation.

Holding numerous patents, KOSCN is recognized as a high-tech and specialized enterprise. Its products are widely used across various sectors, including semiconductors, glass panels, electroplating, wastewater treatment, waste fluid solidification, photovoltaics, leachate from landfills, circuit boards, metallurgy, steel, ultra-wastewater, recycling, chemical, food and beverage, power, paper, biopharmaceuticals, and bio-fermentation.

As a system supplier offering countless solutions across a broad spectrum of industries, KOSCN boasts a professional team that covers every aspect from research and development to design, from quality assurance to production, and from mold making to injection molding. Adhering to ISO9001, ISO140001, and ISO45001 standards, KOSCN commits to quality, environmental sustainability, and health, ensuring high-end product quality for modern production methods.

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