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KOSCN Scientific SMV323 Pneumatic Metal Diaphragm Valve

The KOSCN SMV323 valves are standard industrial-grade and hygienic pneumatic diaphragm valves made of SS316L, featuring electro and mechanical polishing for an enhanced mechanical design. Rated at PN10, they're ideal for high-performance chemical and pure fluid systems.

Apply for
• Water treatment/ Marine engineering
• Circuit boards/ Semiconductors
• Chemicals/ Power generation
• Renewable energy
• Food and beverage
• Biopharmaceuticals/ Medical

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Ease of Installation and Maintenance

Ease of Installation and Maintenance

  • Stand-alone actuator, replaceable, easy disassembly
  • Built-in solenoid valve mounting base for quick installation
  • Position feedback with protective cover, suitable for outdoors and harsh environments
  • Fully plastic exterior, aesthetic and corrosion-resistant
  • Superior lubrication performance, maintenance-free
  • Air intake direction adjustable every 90° for compact space installation
  • Welded valve seat for easy disassembly and reassembly

High Safety Performance

  • Embedded nozzle thread design for various installation strengths
  • Valve body and pneumatic actuator designed with overpressure margin for safety
  • Diaphragm diameter contacts with valve body weir surface, minimizing area and achieving zero leakage
     
High Safety Performance
High Flexibility

High Flexibility

  • Welded connection, hygienic clamp connection
  • Connection standards DIN 11850, ISO 1127, ASME-BPE
  • Diaphragms EPDM, EPDM-PTFE
  • Valve body SUS 316L

Optimal Flow Performance

  • Valve installation ensures a specific angle with the horizontal line for complete drainage
  • Superior flow path for precise flow control
  • Suitable for hygienic applications or those with a small amount of particles and solids
Optimal Flow Performance

Disassembled Components

NO Component Name
1 Pneumatic Actuator
2 Manual Actuator
3 Diaphragm
4 Valve Body
5 Locking Bolts
6 Smooth Flow Transition Channel
 

Size

Inch DN W D4_G DIN 11850-2 ISO 1127 DIN 11850 ASME BPE (DIN EN 558-1)
D S L D S L D1 D2 D3 L D1 D2 D3 L
1/2 15 96 1/4 19,0 1,5 108 21,3 1,6 108 16,0 19,0 34,0 108 9,40 12,7 25,0 108
3/4 20 96 1/4 23,0 1,5 117 26,9 1,6 117 20,0 23,0 34,0 117 15,75 19,0 25,0 117
1 25 120 1/4 29,0 1,5 127 33,7 2,0 127 26,0 29,0 50,5 127 22,10 25,4 50,5 127
1-1/4 32 120 1/4 35,0 1,5 146 42,4 2,0 146 32,0 35,0 50,5 146
1-1/2 40 120 1/4 41,0 1,5 159 48,3 2,0 159 38,0 41,0 50,5 159 34,80 50,8 50,5 159
2 50 120 1/4 53,0 1,5 190 60,3 2,0 190 50,0 53,0 64,0 190 47,50 63,5 64,0 190
Inch DN W H H1 H2 H3 H4 W1 W2 M
1/2 15 M5 129 13 13 24 58 57 57 5
3/4 20 M5 134 16 16 24 58 70 70 6
1 25 M5 169 19 19 24 71 82 94 8
1-1/4 32 M5 173 24 24 24 71 82 94 8
1-1/2 40 M5 218 26 26 32 88 109 122 10
2 50 M5 224 33 33 32 88 109 122 10
Unit：mm

How to Order

Please refer to the table below based on your valve body material, air nozzle mechanism, applicable pipe diameter, pressure, and other information. Click on the product name to link to the order number table. Refer to the order number table for the product number you need to inquire about and inform your sales representative during the inquiry. 
Butt-weld DIN 11850
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 10 323.922.5020 323.972.5020
3/4 20 10 323.922.5025 323.972.5025
1 25 10 323.922.5032 323.972.5032
1-1/4 32 10 323.922.5040 323.972.5040
1-1/2
 40 10 323.922.5050 323.972.5050
2 51 10 323.922.5063 323.972.5063
Normally Open (NO)
1/2
 15 10 323.924.5020 323.974.5020
3/4 20 10 323.924.5025 323.974.5025
1 25 10 323.924.5032 323.974.5032
1-1/4 32 10 323.924.5040 323.974.5040
1-1/2
 40 10 323.924.5050 323.974.5050
2 50 10 323.924.5063 323.974.5063
Double Acting (DA)
1/2
 15 10 323.926.5020 323.976.5020
3/4 20 10 323.926.5025 323.976.5025
1 25 10 323.926.5032 323.976.5032
1-1/4 32 10 323.926.5040 323.976.5040
1-1/2
 40 10 323.926.5050 323.976.5050
2 50 10 323.926.5063 323.976.5063
Butt-weld ISO 1127
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 10 323.922.5120 323.972.5120
3/4 20 10 323.922.5125 323.972.5125
1 25 10 323.922.5132 323.972.5132
1-1/4 32 10 323.922.5140 323.972.5140
1-1/2
 40 10 323.922.5150 323.972.5150
2 50 10 323.922.5163 323.972.5163
Normally Open (NO)
1/2
 15 10 323.924.5120 323.974.5120
3/4 20 10 323.924.5125 323.974.5125
1 25 10 323.924.5132 323.974.5132
1-1/4 32 10 323.924.5140 323.974.5140
1-1/2
 40 10 323.924.5150 323.974.5150
2 50 10 323.924.5163 323.974.5163
Double Acting (DA)
1/2
 15 10 323.926.5120 323.976.5120
3/4 20 10 323.926.5125 323.976.5125
1 25 10 323.926.5132 323.976.5132
1-1/4 32 10 323.926.5140 323.976.5140
1-1/2
 40 10 323.926.5150 323.976.5150
2 50 10 323.926.5163 323.976.5163
Sanitary clamp DIN 11850
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 10 323.922.8020 323.972.8020
3/4 20 10 323.922.8025 323.972.8025
1 25 10 323.922.8032 323.972.8032
1-1/2
 40 10 323.922.8050 323.972.8050
2 84 10 323.922.8063 323.972.8063
Normally Open (NO)
1/2
 15 10 323.924.8020 323.974.8020
3/4 20 10 323.924.8025 323.974.8025
1 25 10 323.924.8032 323.974.8032
1-1/2
 40 10 323.924.8050 323.974.8050
2 80 10 323.924.8063 323.974.8063
Double Acting (DA)
1/2
 15 10 323.926.8020 323.976.8020
3/4 20 10 323.926.8025 323.976.8025
1 25 10 323.926.8032 323.976.8032
1-1/2
 40 10 323.926.8050 323.976.8050
2 80 10 323.926.8063 323.976.8063
Sanitary clamp ASME-BPE
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 10 323.922.8420 323.972.8420
3/4 20 10 323.922.8425 323.972.8425
1 25 10 323.922.8432 323.972.8432
1-1/2
 40 10 323.922.8450 323.972.8450
2 80 10 323.922.8463 323.972.8463
Normally Open (NO)
1/2
 15 10 323.924.8420 323.974.8420
3/4 20 10 323.924.8425 323.974.8425
1 25 10 323.924.8432 323.974.8432
1-1/2
 40 10 323.924.8450 323.974.8450
2 80 10 323.924.8463 323.974.8463
Double Acting (DA)
1/2
 15 10 323.926.8420 323.976.8420
3/4 20 10 323.926.8425 323.976.8425
1 25 10 323.926.8432 323.976.8432
1-1/2
 40 10 323.926.8450 323.976.8450
2 80 10 323.926.8463 323.976.8463
Butt-weld DIN 11850
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 6 323.922.5020C 323.972.5020C
Normally Open (NO)
1/2
 15 6 323.924.5020C 323.974.5020C
Double Acting (DA)
1/2
 15 6 323.926.5020C 323.976.5020C
Butt-weld ISO1127
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 6 323.922.5120C 323.972.5120C
Normally Open (NO)
1/2
 15 6 323.924.5120C 323.974.5120C
Double Acting (DA)
1/2
 15 6 323.926.5120C 323.976.5120C
Sanitary clamp DIN 11850
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 6 323.922.8020C 323.972.8020C
Normally Open (NO)
1/2
 15 6 323.924.8020C 323.974.8020C
Double Acting (DA)
1/2
 15 6 323.926.8020C 323.976.8020C
Sanitary clamp ASME-BPE
d (mm) DN (mm) PN (bar)
 EPDM (per)
 EPDM-PTFE KG
Normally Closed (NC)
1/2
 15 6 323.922.8420C 323.972.8420C
Normally Open (NO)
1/2
 15 6 323.924.8420C 323.974.8420C
Double Acting (DA)
1/2
 15 6 323.926.8420C 323.976.8420C
 
Flow Capability

Flow Capability

Based on data at 20°C with clean water and a 1 bar pressure differential;
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 the variation of flow as a function of the valve's opening stroke.

 
Relative Flow Linearity Graph
Pneumatic Actuator Working Pressure

Pneumatic Actuator Working Pressure

The maximum control force required for diaphragms made of EPDM, PTFE material, based on actual driving data per size, see maintenance manual for details.

Maximum Tolerance Temperature

Plastic actuation mechanisms with pneumatic and manual control, standard design temperature resistance up to 80°C (176°F).

 
Maximum Tolerance Temperature
Actuator Functionality Features

Actuator Functionality Features

 

Actuator Air Consumption

The amount of compressed air needed for the valve to fully open or close under required driving pressure, measured in dm².

Actuator Air Consumption
Drive Air Source Connection

Drive Air Source Connection

  • Air source interface sizes: A air inlet G1/4, B air inlet G1/4
  • Normally Closed NC: Control pressure connected to B air side, valve opens
  • Normally Open NO: Control pressure connected to A air side, valve closes
  • Double Acting DA: Control pressure connected to A air side, valve closes; control pressure connected to B air side, valve opens
  • Electrical Control: NC/ NO actuators use a 3-way solenoid valve; DA actuators use a 5-way solenoid valve Note: The driving pressure for all actuators must not exceed the upper limit to ensure safe use and optimal functionality. Deviation in control pressure may lead to malfunction. In this case, a new actuator configuration is required.

KOSCN

KOSCN Industrial Manufacturing (Shenzhen) Co., Ltd., founded in 2005 and headquartered in Shenzhen, China, operates globally with subsidiaries and agent teams. It offers comprehensive pre-sales and after-sales services worldwide. KOSCN has a professional R&D, design, and production team, adhering strictly to ISO9001, ISO14001, and ISO45001 standards to ensure the highest product quality.

KOSCN's products, mainly automated valves for ultra-pure and corrosive systems, are widely used in semiconductor, glass panel, electroplating, wastewater treatment, waste liquid solidification, solar energy, landfill leachate, PCB, metallurgy, steel, ultra-pure water, recycling, chemical, food and beverage, power, paper, biopharmaceutical, and biofermentation industries

KOSCN
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