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  • KOSCN-MV301-1
  • KOSCN-MV301-2

KOSCN Scientific's MV301 Manual Diaphragm Valve

The KOSCN Control Valves MV301 Manual Diaphragm Valve is our latest innovation, incorporating a multifunctional adjustment module that integrates ergonomic principles, featuring limit and locking functions. Its new diaphragm coupling and void-free suspension structure, along with a smooth flow path, ensure throughput, delivering superior performance.

Apply for
• Landfill leachate, photovoltaics, printed circuit boards, electroplating
• Glass panels, electronic semiconductors
• Power generation, steel metallurgy, petrochemicals
• Papermaking, chlor-alkali, biopharmaceuticals
• Food and beverages

Manual Data sheet Company Product Brochure

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Easy and Convenient Installation and Maintenance

Easy and Convenient Installation and Maintenance

  • Utilizes numerous clasps and threaded connections for easy assembly and disassembly.
  • All-plastic exterior design, aesthetically pleasing and corrosion-resistant.
  • Precise screw fit with minimal gap, smooth operation without the need for maintenance.
  • All connection types and installation lengths are consistent with international market valves.
  • Integrated visual position feedback for easy monitoring.
  • Adjustment module designed for ergonomic operation.
  • Handwheel features locking grooves every 22.5° for precise control of opening and closing.

High Safety Performance

  • Diaphragm stop limit design for torque overload protection.
  • Suspended, air-gap diaphragm coupling mechanism fully protects the diaphragm.
  • Handwheel adjustment module includes an integrated lock switch for lockout capability.
High Safety Performance
High Flexibility

High Flexibility

  • Connection types include order, socket, butt weld, and flange.
  • Interface standards include metric, JIS (Japanese Industrial Standard), and ANSI (American National Standards Institute).
  • Diaphragm materials: EPDM, FPM, EPDM-PTFE.
  • Valve body materials: PVC-U, PVC-C, PP-H, PP-Natural, PVDF.
  • Some products offer an oil-restriction option.

Optimal Flow Performance

  • Good linear fluid characteristics enable regulation function.
  • Smooth transitional duckbill channel provides double the flow capacity of traditional diaphragm valves.
  • Suitable for media containing small particles and solids.
Optimal Flow Performance

Disassembled Components

NO Component Names
1 Indicator Rod
2 Handwheel
3 Lead Screw Nut
4 Lead Screw
5 Coupling
6 Diaphragm Pressure Block
7 Valve Seat Cover
8 Diaphragm
9 Valve Seat
10 Port
11  Base

PVC-U Manual Diaphragm Valve
- Union Socket-end

D DN GD D D1 D2 H H1 L L2 L3 M Z W W1 Lift=Hx
20 15 1 65 37 43 73 14 128 96 25 6 90 57 57 7
25 20 1-1/4 65  37 51 81 18 152 114 25 6 108 70 70 10
32 25 1-1/2 87  54 58 115 26 166 122 40 8 116 82 94 15
40 32 2 87 54 72 115 26 192 140 40 8 134 82 94 15
50 40 2-1/4 135 69 83 166 39 222 160 45 8 154 109 122 22
63 50 2-3/4 135 69 100 166 39 266 190 45 8 184 109 122 22
 

PVC-U Manual Diaphragm Valve
- Flanged Connection

D DN D D1 D2 D3-DIN D3-JIS D3-ANSI D4 H H1 L L3 M W W1 Lift=Hx
20 15 65 37 95 65 70 60,45 14'16 81 18 145 25 6 70 70 10
25 20 65 37 105 75 75 69,85 14'16 81 18 150 25 6 70 70 10
32 25 87 54 115 85 90 79,25 14'19 115 26 170 40 8 82 94 15
40 32 87 54 140 100 100 88,90 16'19 115 26 180 40 8 82 94 15
50 40 135 69 150 110 105 98,55 16'19 166 39 210 45 8 109 122 23
63 50 135 69 165 125 120 120,65 18'20 166 39 230 45 8 109 122 23
75  65 135 69
 185 145 139 139,70 18'20 173 46 245 45 8 109 122 24

PVC-C Manual Diaphragm Valve
- Union Socket-end

D DN GD D D1 D2 H H1 L L2 L3 M Z W W1 Lift=Hx
20 15 1 65 37 43 73 14 128 96 25 6 90 57 57 7
25 20 1-1/4 65 37 51 81 18 152 114 25 6 108 70 70 10
32 25 1-1/2 87 54 58 115 26 166 122 40 8 116 82 94 15
40 32 2 87 54 72 115 26 192 140 40 8 134 82 94 15
50 40 2-1/4 135 69 83 166 39 222 160 45 8 154 109 122 22
63 50 2-3/4 135 69 100 166 39 266 190 45 8 184 109 122 22

PVC-C Manual Diaphragm Valve
- Flanged Connection

D DN D D1 D2 D3-DIN D3-JIS D3-ANSI D4 H H1 L L3 M W W1 Lift=Hx
20 15 65 37 95 65 70 60,45 14'16 81 18 145 25 6 70 70 10
25 20 65 37 105 75 75 69,85 14'16 81 18 150 25 6 70 70 10
32 25 87 54 115 85 90 79,25 14'19 115 26 170 40 8 82 94 15
40 32 87 54 140 100 100 88,90 16'19 115 26 180 40 8 82 94 15
50 40 135 69 150 110 105 98,55 16'19 166 39 210 45 8 109 122 23
63 50 135 69 165 125 120 120,65 18'20 166 39 230 45 8 109 122 23
75  65 135 69
 185 145 139 139,70 18'20 173 46 245 45 8 109 122 24

PP-H Manual Diaphragm Valve
- Union Socket-end

D DN GD D D1 D2 H H1 L L2 L3 M Z W W1 Lift=Hx
20 15 1 65 37 43 73 14 128 96 25 6 90 57 57 7
25 20 1-1/4 65  37 51 81 18 152 114 25 6 108 70 70 10
32 25 1-1/2 87  54 58 115 26 166 122 40 8 116 82 94 15
40 32 2 87 54 72 115 26 192 140 40 8 134 82 94 15
50 40 2-1/4 135 69 83 166 39 222 160 45 8 154 109 122 22
63 50 2-3/4 135 69 100 166 39 266 190 45 8 184 109 122 22
 

PP-H Manual Diaphragm Valve
- Flanged Connection

D DN D D1 D2 D3-DIN D3-JIS D3-ANSI D4 H H1 L L3 M W W1 Lift=Hx
20 15 65 37 95 65 70 60,45 14'16 81 18 145 25 6 70 70 10
25 20 65 37 105 75 75 69,85 14'16 81 18 150 25 6 70 70 10
32 25 87 54 115 85 90 79,25 14'19 115 26 170 40 8 82 94 15
40 32 87 54 140 100 100 88,90 16'19 115 26 180 40 8 82 94 15
50 40 135 69 150 110 105 98,55 16'19 166 39 210 45 8 109 122 23
63 50 135 69 165 125 120 120,65 18'20 166 39 230 45 8 109 122 23
75  65 135 69
 185 145 139 139,70 18'20 173 46 245 45 8 109 122 24

PP-Natural Manual Diaphragm Valve
- Union Socket-end

D DN GD D D1 D2 H H1 L L2 L3 M Z W W1 Lift=Hx
20 15 1 65 37 43 73 14 128 96 25 6 90 57 57 7
25 20 1-1/4 65  37 51 81 18 152 114 25 6 108 70 70 10
32 25 1-1/2 87  54 58 115 26 166 122 40 8 116 82 94 15
40 32 2 87 54 72 115 26 192 140 40 8 134 82 94 15
50 40 2-1/4 135 69 83 166 39 222 160 45 8 154 109 122 22
63 50 2-3/4 135 69 100 166 39 266 190 45 8 184 109 122 22
 

PVDF Manual Diaphragm Valve
- Union Socket-end

D DN GD D D1 D2 H H1 L L2 L3 M Z W W1 Lift=Hx
20 15 1 65 37 43 73 14 128 96 25 6 90 57 57 7
25 20 1-1/4 65  37 51 81 18 152 114 25 6 108 70 70 10
32 25 1-1/2 87  54 58 115 26 166 122 40 8 116 82 94 15
40 32 2 87 54 72 115 26 192 140 40 8 134 82 94 15
50 40 2-1/4 135 69 83 166 39 222 160 45 8 154 109 122 22
63 50 2-3/4 135 69 100 166 39 266 190 45 8 184 109 122 22
 

PVDF Manual Diaphragm Valve
- Flanged Connection

D DN D D1 D2 D3-DIN D3-JIS D3-ANSI D4 H H1 L L3 M W W1 Lift=Hx
20 15 65 37 95 65 70 60,45 14'16 81 18 145 25 6 70 70 10
25 20 65 37 105 75 75 69,85 14'16 81 18 150 25 6 70 70 10
32 25 87 54 115 85 90 79,25 14'19 115 26 170 40 8 82 94 15
40 32 87 54 140 100 100 88,90 16'19 115 26 180 40 8 82 94 15
50 40 135 69 150 110 105 98,55 16'19 166 39 210 45 8 109 122 23
63 50 135 69 165 125 120 120,65 18'20 166 39 230 45 8 109 122 23
75  65 135 69
 185 145 139 139,70 18'20 173 46 245 45 8 109 122 24
Pressure-Temperature Curve

Pressure-Temperature Curve

Data is based on pure water media and a safety lifespan of 25 years; application with other media requires reduced temperature and pressure.

Flow Capacity

Data based on pure water media at 20°C and a pressure differential of 1 bar;
Cv = Kv X 0.07
Fv = Kv X 0.0585
Kv (liters/min)
Cv (gallons/min) US
Fv (gallons/min) GB

Flow Capacity
Relative Flow Linearity Graph

Relative Flow Linearity Graph

Relative flow linearity coefficient refers to the change in flow rate as a function of the valve opening stroke.

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.

KOSCN
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