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Aseptic diaphragm valve

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Aseptic Diaphragm Valve

The WJ6 Aseptic Diaphragm Valve features CNC precision machining for optimal diaphragm sealing and extended service life. Available in mechanically or electropolished finishes (up to Ra 0.25μm), it meets GMP cleanliness requirements. Its soft elastic diaphragm material offers excellent chemical resistance and temperature stability, making it ideal for pharmaceutical, biotech, and food-grade applications. FDA-compliant diaphragms and other certifications (e.g., USP, CE) are available upon request.

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Detailed Description

 

WJ6 Aseptic Diaphragm Valve – CNC Precision Machining & FDA-Grade Diaphragms

 

The WJ6 aseptic diaphragm valve features CNC precision machining, ensuring a perfect match between the sealing surface of the valve body and the diaphragm curvature. This reduces friction, extends diaphragm lifespan, and enhances performance in sterile fluid transfer, biopharmaceutical processing, and high-purity applications.

The internal valve chamber can be mechanically polished or electropolished upon request. Surface finish can reach as low as Ra 0.25μm, meeting stringent GMP cleanability standards.

 

Soft Elastic Material Diaphragm – Chemical Resistance & Flexibility

 

Crafted from soft elastic materials, the diaphragm resists chemical attack from media containing fibrous residues, solid particles, or catalysts. This property ensures consistent sealing performance even under challenging conditions such as CIP/SIP cleaning, pharmaceutical production, or biotech fermentation systems.

Depending on the working temperature, disinfection process, and media chemistry, we offer various diaphragm materials including EPDM, PTFE, and others tailored to your application.

 

FDA & Other Compliance Certifications

 

All AOMI diaphragm valves conform to FDA standards, making them ideal for pharmaceutical, food, and biotechnology industries. Other certifications, such as USP Class VI, 3A Sanitary, CE, ISO, can be provided upon request.

 

Material Selection – Safety First

 

Before selecting diaphragm and valve body materials, users should perform a full application analysis, especially in chemical processing and pharmaceutical environments. Chemical compatibility must be confirmed with reliable data or third-party validation to ensure long-term safety, integrity, and durability of the valve.

 

Diaphragm Fixation Method – Vacuum-Proof Design

 

Our valves use a screw-fixed diaphragm retention method, which distributes mechanical load across the full surface of the bolt. Compared to perforated fixation designs, this method significantly reduces the risk of mechanical failure under vacuum conditions, ensuring superior reliability and tight sealing.

 

Aomi’s unique aseptic diaphragm seal structure eliminates hygiene risk areas, ensures complete self-draining, and is more compatible with CIP/SIP processes.

  

Parameter

 

Body type Code
2/2way body D
Tank bottom valve body B**
T valve body T
L valve body L
Multi-port body M**
NOTE:According to customer requirements

 

Valve body material    Code
316L(1.435)Forged body F6
CF3M(1.4435)casting body C6

 

Mode opration   Code
Manually    M
No rmally   NO
Nc rmally   NC
Double acting   AA

 

Diaphragm material   Code
FPM max200℃*   FPM
EPDM max130℃*   EPDM
Silicone max180℃*   SI
PTFE/EPDM max150℃*   PTFE
 *Steam sterilization temperature<20min

 

Connections   Code
Butt weld
DIN11850 series0 D0
DIN11850 series 1 D1
DIN11850 series 2 D2
DIN11850 series 3 D3
DIN11866 series 1 D6
ASTM BPE AB
ISO1127 series 1 ISO
BS 4825 part 1 BS
JS 3459 JIS
JS 3447 JIS7
Clamp
DIN 32676 series 1 DC
ASTM BPE ABC
DIN 32676 series B ISOC
BS2825-3 BSC

 

Valve body surface finish,internal contour Code
Mechanically Polished WITH Product Contact Surface:RA<0.51um,other:No finish requirement SF1-1
Mechanically Polished WITHProduct Contact Surface:RA<0.51um,other:Mechanically Polished SF1-2
Electropolished WITHProduct Contact Surface:RA<0.51um,other:No finish requirement SF4-1
Electropolished WITH Product Contact Surface:RA<0.51um,other:Mechanically Polished SF4-2
Electropolished WITH Product Contact Surface:RA<0.51um,other:Electropolished SF4-3

 

Based on the structural characteristics of aseptic diaphragm valves, the following installation orientations are recommended. These configurations facilitate complete drainage after cleaning and minimize the risk of fluid retention inside the valve.

 

aseptic diaphragm valve factory

 

Body Angle
Forged Body                              Casting Body
DIN        β ASTM
BPE
β SO1127
series1
M      DIN        β ASTM
BPE
β SO1127
series1
M
DN10 26° 13.5 26° DN10 31° 13.5 31°
DN15 21° 1/2" 27° 17.2 24° DN15 26° 1/2" 31° 17.2 26°
DN20 32° 3/4" 21° 21.3 17 DN20 32° 3/4" 26° 21.3 26°
DN25 26° 1.0" 30° 26.9 29° DN25 32° 1.0" 32° 26.9 32°
DN32 29° 1.25" 31° 33.7 30° DN32 31° 1.25" 31° 33.7 31°
DN40 24° 1.5" 27° 42.4 24° DN40 28° 1.5" 28° 42.4 28°
DN50 25° 2.0" 25° 48.3 27° DN50 31° 2.0" 31° 48.3 31°
DN65 21.5° 2.5" 21.5° 60.3 23° DN65 27° 2.5" 27° 60.3 27°
DN80 20.1 3.0" 25.1° 76.2 27° DN80 31° 3.0" 31° 76.2 31°

 

AVM aseptic diaphragm valves feature a unique sealing structure that eliminates hygienic dead zones, allowing for complete media drainage and enhanced compatibility with CIP/SIP processes.

The picture diagram illustrates the difference between AVM’s unique sealing design and that of a conventional valve.

 

Bult Weld
Actuator DN NPS  DIN ASTM-BPE ISO 1127
series 1
BS4825-
series 1 series 1 series 2 series 3
10 4 6×1.0
6 8×1.0 10.2×1.6
8 1/4" 10×1.0 6.35×0.89 13.5×1.6 6.35×1.2
10 3/8" 12×1.5 12×1.0 13×1.5 14×2.0 9.53×0.89 9.53×1.2
15 1/2" 12.7×1.65 12.7×1.6
15 10 3/8" 12×1.5 12×1.0 13×1.5 14×2.0 9.53×0.89 17.2×1.6 9.53×1.2
15 1/2" 18×1.5 18×1.0 19×1.5 20×2.0 12.7×1.65 21.3×1.6 12.7×1.6
20 3/4" 19.05×1.65 19.05×1.6
25 DN15 1/2" 18×1.5 18×1.0 19×1.5 20×2.0 12.7×1.65 21.3×1.6 12.7×1.6
DN20 3/4" 22×1.5 22×1.0 23×1.5 24×2.0 19.05×1.65 26.9×1.6 9.05×1.6
DN25 1.0” 28×1.5 28×1.0 29×1.5 30×2.0 25.4×1.65 33.7×2.0 25.4×1.6
40 DN32 1-1/4" 34×1.5 34×1.0 35×1.5 36×2.0 31.75×1.65 42.4×2.0 31.75×1.
DN40 1-1/2" 40×1.5 40×1.0 41×1.5 42×2.0 38.1×1.65 48.3×2.0 38.1×1.6
50 DN40 1-1/2" 48.3×2.0
DN50 2.0" 52×1.5 52×1.0 53×1.5 54×2.0 50.8×1.65 60.3×2.0 50.8×1.6
65 DN65 2.5" 70×2 63.5×1.65 76.2×2.3
80 DN80 3.0" 85×2 76.2×1.65 88.9×2.3

 

aseptic diaphragm valve factory

 

Size of diaphragm
Actuator A B C D d    K N PTFE                      EPDM
Operating
Pressure
SIP
Temperature
Operating
Pressure
SIP
Temperature
 DN10 22 22 32 32 4.5 4 6bar max 150℃ 10bar max 130℃
 DN15 39 44 49 54 6    M5 4 6bar max 150℃ 10bar max 130℃
 DN25 54 46 72 57 9 1/4"-20UNC 4 6bar max 150℃ 10bar max 130℃
 DN40 70 65 100 90 11 1/4"-20UNC 4 6bar max 150℃ 10bar max 130℃
 DN50 82 78 133 105 13 1/4"-20UNC 4 6bar max 150℃ 10bar max 130℃
 DN65 102 95 145 133 13 M8 4 6bar max 150℃ 10bar max 130℃
 DN80 127 114 175 156 18 M8 4 6bar max 150℃ 10bar max 130℃

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